Document Dd34xpe6mLpZBb5GXxzk5pyjd

Use of a battery-powered lift truck equipped with a 'Transveyor" platform has halved han dling time in a California lumber yard from the previous method. Formerly it took three men end a regular lift truck to carry timbers from the 'aminating presses to the planer. The Trans veyor, which can move sideways, has replaced doilies, eliminated manual handling and in creased the number of timbers that can be cerried in a load. These beams at the Ed Foun tain Lumber Co., are first glued into one rigid timber and then carried by the Automatic Div. of Yale & Towne Manufacturing Co., truck and Transveyor to the planer which smooths the edges of the timber. LOOK WHAT BATTERIES ARE DOING! Here are four examples of the wide variety of tasks being performed in industry and commerce by reliable lead-acid battery-powered trucks . . . Prototype of a new type battery-powered truck for metropolitan deliveries is expected to speed deliveries while cutting costs from one third to one half. The modern, production-line-assembled "battronic" trucks, soon to appear on the market have sufficient speed and economy to out perform combustion-engine trucks in punishing stop and start service. According to the Battronic officers pic tured, this is the first time a battery-powered street vehicle will be sold in the United States at prices competitive with conven tional trucks. One reason is o "power metering" rental plan that saves the user from having to invest in batteries and chargers, ac cording to the producers, Battronic Truck Corpora tion, 5675 Rising Sun Ave., Phila. Compact, narrow aisle reach trucks powered by lead-acid batteries, have helped E. W. Ferry Screw Products, Inc., to double its stock storage space while cutting handling time by 20 percent. The truck enobled the company to discard its out dated shelf storage system with wide aisles and substitute a narrow aisle system with palletized rocks that uses high air space for storage. The reach truck works easily in the seven-foot aisles and saves order-filling time by quickly removing 3,000 !b. pallet loads from top racks, twelve feet up. 1 A fleet of 16 battery-powered trucks has been instrumental in break ing the last manual handling barrier at a large brewing plant. Conventionally, mechanization stops of the dock where trucks are loaded and unloaded manually. Now, palletized loads are whisked in and out of the trucks by the battery-powered lift trucks at Carling Brewing Company's new Baltimore plant. A fork truck can load or unload a trailer in minutes, but it takes a crew of five from two to four hours to do it manually. In addition, electric power enables the trucks to maneuver through all operations in the brewery without fear of contaminating the potables. Pallets automatically assembled on the palletizing machine are stored in stacks twelve feet high. L 1^26305 if Workman burns lead waterproofing to spray pipe. MIRROR lAllbSbSOfeS Water sprays provide constant movement of water over surface of break the monotony The office building now being com pleted between 43rd and 44th Streets on the Avenue of the Americas in New York City actually "grew up." It be gan as a five story building, added three more stories in 1957 and will now reach its full twenty-one story growth with the addition of thirteen C more floors. Part of this growth of course took place within the building, the lobbyhaving been extended completely through the building from 43rd to 44th Streets. Since the lobby can be entered :: i either street, the approaches to the centrally located elevators are exactiv similar. The problem of monot ony was therefore the architect's first problem. The solution was simple and direct. Pools, verv nearly mirror images, w ere placed on either side of the banks of elevators with the water, bubbling from jets, providing a constantly changing kaleidoscope of pattern and reflected color. Modern sculptures against a white marble background complete the as sembly and create an atmosphere quite in keeping with the distinctive neigh borhood of which it is a part. The presence of a garage partly under the lobby created a major wa terproofing problem to the architects once the pools had been decided upon. The solution in this case was just as direct. Eight pound lead was used throughout, a total of about four tons. All joints were burned and the lead was protected both sides with a coat of asphaltum. Detail sections show a careful regard for good practice. h: 'xT . Architects: Kohn& Jacobs - *-4 > Sy Mech. Eng..: Syska & Hennewy, Inc ? ~ * J lead Worik' john f. Abemetby C<c ~ * ****- * ^ ,r General Contractors: R, It. H. Const, Corp. vc X FtumbtojContractors?*CC Murphy:*; `S* . _-a. *4* . W* CREDIT WHERE CREDIT IS DUE In the last issue of LEAD, principals, architects, and contractors for the new Prudential Building in Boston were listed with the story of lead-asbestos anti-vibration pads for the new building. The editors erred in omitting the most important of the con tractors, the manufacturers of the lead-asbestos pads them selves. These were made by -- Knapp Mills, Inc. 23-15 Borden Avenue Long Island City 1, N. Y. LIA 26 30 6 -3 -- Si ftta#U.ttra-eny teraas tar Sato in tat 0 tT3 * i I Back in 1682. when the General Assembly Another view of the Route 80 bridge. Neorly 80 tons of red lead were used to prime the structural steel of this bridge. Superstructure: American Bridge Div., U.S. Steel Corp. Substructure: Conduit & Foundation Corp. (at left) of the Colony of East Jersey passed an Act fur "making and settling of highways, passages, landings, bridges and ferries ... fit and apt for travelling.'" even that far-sighted little group couldn't have foreseen the vast 2.000 mile net work which now makes up the New Jersey State Highway System. In 1961. New Jersey's state highways carried 5,000 gallons of red lead paint were used to prime the steel of the Route 3 bridge (shown here and on the cover). It is the first in northern New Jersey to be equipped with low-level fluorescent lights. Superstructure: Phoenix Bridge Co. Sub structure: J. Rich Steers Inc. an average of 12.425 cars per mile each day. or more than five times the national average. Faced w ith these impresshe figures -- plus the prospects of a 60 G increase in automobile registration by 1975. New Jersey 's State Highwav Department has been building neyv roads I and improving existing facilities. i Neyv bridges are an important part of this ' expanding road sy stem in Neyv Jersey, and ty\o ; of the latest are the 86.9 million Interstate Route 80 bridge and the Route 3 bridge, both of yvhich span the Hackensack River in north eastern New Jersey. More than 13,000 gallons of paint yvere re quired to cover the structural steel on the Route 80 bridge alone, and trvo-thirds of that yvas the shop and field coat of red lead primer. The Route 3 bridge yvas also protected w ith a shop and field coat of red lead paint. Over 8 million lb. of structural and rein- forcement steel yvere used to build the Route 3 bridge and it required more than 5,000 gallon? of red lead shop and field coat paint. The paint used in both cases conformed U> the New Jersey State Higlnvay Department . Standard Specifications for road and bridge construction; Federal Specification TT-P-86a. Type I; and a a s h o Designation M 72, Type II- LIA26307 ^v oo ORGANOLEAD COMPOUNDS Rediscovery of useful materials is -uiiiething 0{ a commonplace in this centurv. DDT and penicillin are two examples of so-called laboratory curi osities which gathered dust for years before their remarkable usefulness be came clear. It was this familiar fact that lead to [he undertaking of a study of lead chemicals under the direction of the International Lead Zinc Research Or ganization* at the Institute for Or ganic Chemistry TNO in Ltrecht. Holland. Of the hundreds of organolead compounds studied in this pro gram. four have shown such promise [hat they are now being produced in limited quantity for ev aluation. The four related compounds are combinations of lead with the famil iar aromatic chemical, benzene, and are thus called lead aromatics or arvllead compounds. Their structure is analogous to the most common alkvllead, tetraethyl lead, which is widely used as an antiknock additive for gasoline. The full descriptive names of the four are: tetraphenyl lead (CH5)4Pb hexaphenyl dilead (C4H5)4Pbi triphenyl lead acetate {C*H5)3PbC00CH3 diphenyl lead diacetate MshPbpOCH,), Preliminary screening has indicated that all four are generally useful in the following applications: antifoul ing biocide for marine paints, pesti cides. heat and light stabilizers for polymerized chlorinated hydrocar bons. catalysts for polyurethanes and for esterification generally, and as producers of chemical radicals. Their usefulness as toxicants is an indication that they should not be handled by inexperienced or unin formed people and proper precautions in handling materials of this kind are recommended. These include protec tion against ingestion, inhalation and skin absorption. Though supplies of the compounds are limited, they will be made avail able on request for user evaluation. Inquiries should be directed to Prof. G. J. M. van der Kerk, Institute for Organic Chemistry TXO. 79 Croesestraat, Ltrecht. The Netherlands. All inquiries should be accompanied by a description of the field of applica tion to be tried and the plan for evaluation. PROPERTIES OF ARYLLEAD COMPOUNDS Name Crystal color Preferred solvent m.p. for recrystallization Stability Solubil ity grams per liter tetraphenyl colorless lead 225C chloroform (decomposing) (1 g in IS ml) very good chloro* water thflfioi pyridine dioxane acetone ether form benzene hexone insol. 0.1 7.5 12 0.8 0.7 17 9 0.6 hexaphenyl faintly dilead1 yellow decomp 150C Chloroform (1 g in 5 ml) ppt with equal vol ethanol slow degrad, if exposed to light insol. 0.4 100 125 9 6 340 75 0.9 triphenyl lead acetate2 colorless 206 C acetone (decomposing) (1 g in 25 ml) very good 0.15 5 175 32 6 0.7 50 4.5 0.4 diphenyl lead diacetate3 colorless 212 C acetone, 5% acetic very good 7.5 100 190 90 20 0.9 425 14 0.1 (decomposing) acid (1 g in 10 ml) 1) Decomposes on heating into lead and tetraphenyl lead. Decomposition starts at about 90C and is fairly rapid at 150C. 2) Triphenyl lead acetate is a fairly strong base. 3) Formula as given in body of the article, but can also be obtained with one mole of acetic acid of crystallization. With out the acid of crystallization this is a weak base and may hydrolize to some extent in water. 'Formerly the Expanded Research Proqrcm ef `Le Lead IndustLes Assn,. Inc. LIA26308 Overall map of the Sportsmens Center shows: I --the lodge ot the head of the sole entrance road, 2 -- a 60 yard archery range, 3 -- a 28*point progressive archery range, 4 -- pistol ranges, 5 -- the large bore 100, 200, and 300 yard ranges, 6 -- small bore range, 7 -- the skeet and trap area, 8 --the casting pond. Note that all the shooting ranges fan outward from a central point and all shooters must pass through lodge checkpoint in order to get to any range. View of the lodge from the parking lot (at right). PLANNING A Th e CONSTITUTION gives Amer with high fences in the most trafficked area. will have two separate 16-station l icans the right to own and carry fire Willingness of the founding officials to take tol ranges of 15 and 25 (combii arms, yet the average city-dweller responsibility for any unfavorable public re and 50 yards; ranges for larse never has a chance to enjoy shooting action - usually from those least familiar guns of 100, 200. and 300 van or learn the rules that make it safe with shooting. The guiding philosophy must 45-station range for small bore i and satisfying. What Scout Troop or be that the most good is being done for the or 100 vards. and four fields fortl Boys' Club wouldn't welcome the greatest number of persons. and skeet shooting. In addition j, chance to do some supervised shoot is a fly and bait casting pond andt- ing? Industrial plants with organized Establish who has the legal right to build archery ranges for target and S clubs and teams have found shooting the facility. archery. Beyond pure recreation as popular as bowling. Use good judgment in selecting a site. facilities will be used: to ins& Charles E. Pound, Commissioner of Parks in New York's Westchester And most important: live up to the continu ing responsibility to maintain safety. hunters so that they can pasr safety examination required by County, and Charles E. Rapp, Direc state; for police practice, and r tor of Parks and Planning, recently The Sportsmen's Center eventually safety demonstrations. ij built a budget-priced Sportsmen's Center combining shooting, archery, and a casting pond. They laid down these fundamentals in undertaking Marksmen shed in the ffl and 200 yard large bore ! the project: seen at csni Determine the need (it's estimated that 50,000 people may make use of the Sports banked eortk misses. men's Center). Pa pe r m esh Select a remote site - if possible, have a mile or so of "no man's land." The Sports men's Center not only has this buffer zone, buf 1500 warning signs to mark it off, along banked ecrth pit until grd to grow. Dp (note woman is generous tot LIA26309 ) UN CLUB m p ineik ' : bw "ds; i at S ' r trij thm d tw, fid files stne, 5 til V til d fa 1 Other facilities at the center include a main lodge with snack bar, a con crete block ammunition storage room, and a parking lot. Though the price tag of the center was set at about $400,000, it has been built for under $250,000. The saving is largely the result of Commissioner Pound's con centration on utility and safety to the exclusion of frills, and Mr. Rapp's tireless planning and efforts to stav within the $250,000 appropriated for the project. The center plans to be in operation bv earlv fall 1963. Ultrasonic Strip Cleaner and automatic tuning generators that feed power to machine's lead lirconate-titanate transducers individually. Note hand screws for adjusting internal rollers to accommodate varying thicknesses of steel strip. ULTRASOUNp Shrinks a pickling line In the fabrication of steel, hotrolling tends to cause "mill scale" or surface oxidation to form. This oxi dation or scale is then removed before the next operation -- cold rolling -- is carried out. While it sounds very simple, the successful removal of mill scale (pick ling) is a major step in steel fabrica tion. And, up. to now, it has required shot blasting, or some other method of loosening scale, recoiling and then soaking in several vats of acid to complete scale removal, rinsing, and drying. In order to get around this compli cated procedure, the Carpenter Steel Co., of Reading, Pa., has installed the first production model ultrasonic pickling line for continuous strip. While the unit still works in conjunc tion with a shot blaster and an acid bath, thanks to ultrasonic energy and the lead zirconate-titanate transducers that produce it, pickling is done rap idly at a lower cost--and the finished product is uniformly cleaner. Not only that, but to have estab lished the same operation on a con tinuous basis with straight acid-type pickling would have required a great deal more space; initial equipment costs would have been higher, and the disposal problem created by the spent acid would have been greatly magnified. WTiat happens is this: shot-blasted steel strip is fed into an alkaline solu tion at one end of the 18-ft. long machine, and from there it goes be tween a battery of 20 lead zirconatetitanate ceramic transducers vibrating at approximately 25,000 cycles per second. With ten of these 250 watt transducers vibrating in the solution on either side of the steel strip, the remainder of the scale not knocked oS by shot blasting is easily removed by ultrasound. While still in the ma chine the steel is rinsed and "damp dried" by means of a high pressure air knife -- all of this at a maximum rate of 100 ft. per minute. Two acid pickling baths follow right in line after the ultrasonic cleaner, and, depending upon the ma terial being processed, may or may not be used. After that, the strip is given a final rinse, dried and coiled. The ultrasonic cleaner was built and developed by P. C. S. Div., Na tional Ultrasonic Corp., Somerville, N. J., specialists in the field of ultra sonic cleaning. While there are other transducer materials available, Na tional Ultrasonic chose lead zirconatetitanate because it has proved to be about the best piezoelectric material available. And it has been found to be especially important for applica tions involving high power levels over wide temperature ranges. --7 -- LIA 2 6310 Men at work Installing the enclosure give some idea of the size of each of the transformers. They stand about 14 feet high. The en closure Is about 5 x 10 x 14 feet. TRANSFORM! lead-steel-glass fiber housif developed at Portland General Electij lops 15 to 20 decib from transformer's hu] Electric power, and the utilities that provide it. are taken very much for granted. One of the few times when people notice either is when a new transformer or substation is installed in a quiet neighborhood. All trans formers hum. If the environs are quiet enough and the transformer noisv enough, there is a noise prob lem -- a problem which the utilities may pay thousands of dollars to cor rect in just one installation. L ntil now the power company has followed one of two usual paths in subduing such noise. First, the trans former can be replaced with specially built equipment having a lower noise rating. These units are expensive, take time to procure and. of course, mean additional costs for removal of the noisv transformer and reinstallation of the new one. The second approach is to build a partial masonry enclo sure w ith acoustic treatment and w ith or w ithout the addition of supplemen tary panels to the transformer. W hile this may not cost as much as the lownoise equipment, it has the drawback that any decrease in sound level in one direction is accompanied by an in crease in another. Often, too. it means that supplementary cooling must be provided -- an expensive extra if re motely located radiators are needed. WTien Portland General Electric Company received complaints about a bank of three single-phase auto transformers, the first step was a sound level survey to see whether the complaints were valid. Often such a survey will show that the noise prob lem is trifling, the complaints stem ming from resentment that the unit was built at all. Landscaping is often the "solution" to such "noise" prob lems. In this case though, readings taken between midnight and 4 A. M. showed that there was valid reason for the complaints. Four locations at from 140 to 500 feet from the trans formers showed noise levels increased from 10 to 19 decibels above the minimum nighttime level. In a technical paper presented to the Institute of Electrical and Elec tronic Engineers. Mr. P. N. Adkins of Portland General Electric decribed the decision made then in these words: "In consideration of plans for future system additions, and recogniz ing the probability that noise prob lems would arise with increasing frequency in the future, the decision was made not just to solve this prob lem. but to become familiar enough with transformer noise problems in general that analyzing and prescrib ing treatment for future problems would be relatively painless." PGE investigated surrounding the transformer with a close-fitting noise barrier. The idea was to contain the BARRIER TRANSMISSION LOSS IN DECIBELS The plotted data shows the severe penalty paid tor even small gaps In the enclosure. As an extreme example, note that a 40 decibel barrier which covered as much as 90 per cent of the source would only produce a 10 decibel attenuation. noise but keep the enclosure enough so that the radiators con, remain in their normal positions. Sfl eral conditions had to be met if scheme was to work. First, it had be possible to build enough soug transmission loss into the barrier solve the problem. Second, the s<JUq build-up inside the enclosure had be held to some reasonable, vai Third, the transformer had to coi tinue to function effectively. And nally. the cost had to be commensur^ w ith the results. Theoretical examination of the plaj brought home the importance complete coverage of the unit. T]j importance of even small gaps in tfi barrier can be seen in the plot ioj positel. If a 20 decibel attenuation sought and a 30 decibel barrier used, the extent of coverage must at least 99 per cent. It was realized that the last few \ cent of area would he covered onU increased cost and trouble -- esp ciallv in view of the valves and gag which had to be accessible. To stop the build-up of sounC: within the enclosure, it was planned! to mount a two-inch thick blanket oftf glass fiber approximately one im inside the inner face. It was estimati -- and subsequently verified by surement -- that this would hold t! build-up to 3 decibels. In selecting materials for the bal rier walls themselves, the "mass law of acoustics indicated that the heavii the harrier, the more sound would stopped. The mathematics of the siti ation are quite complex, howev since in order for the mass law accurately predict performance of barrier a construction had to found which would not resonate nr Knlr...- frequencies in questiol 8-- -- LIA 263 11 jn * (,or a 60 cycle per second power a line, these are 120. 240. and to a .lightly lesser extent 360 cycles per 7* '^-ond. i Lead, bonded to steel with bi jdhesive. was chosen as the barrier U ,,all because of its weight and be n4 cause it tends not to resonate. to The three transformers, each with n4 , maximum rating of 41.7 MVA in to Mepdown service, dropping 115 kv to Je. 57 kv. were identical. They stood > about 11 feet high. The plan was to S. complete the enclosure for one, then He ,,0 ahead with the other two. profiting b\ the experience gained. The barrier as material was made bv laminating of !0-gage steel to four-pound il ,16 he inch! lead with an epoxv adhesive. he This was formed and cut into fitted P- sections. The enclosure and its frame is sere built to be free standing and iso is? be lated from the transformer. Isolation of the barrier in a design like this is quite important because er anv mechanical coupling between the at barrier and the transformer would have permitted vibration to travel into ' the wall and reradiate as sound. For this reason pipes and fittings piercing the walls were isolated from them hv compliant neoprene gaskets. The transformer itself was supported on rubber pads so that vibration could not travel to the walls via the founda tion. The metal roof of the enclosure has the only exception to this prac tice. It was intentionally fastened to the top of the transformer at a point "Here vibration was minimum. This "as possible because the roof was ( flexible and would not transmit vibrar | bon to the walls well, the small top Mrea of the transformer did not ac tively vibrate due to its high mass l it 'arries heavy bushings), and it. in turn, is partially isolated by the gasSlled cavitv under it. Before and after pictures of one of the three transformers. The enclosure (right) cut 17 decibels from the noise. After completion, but before the radiators were reinstalled, the trans former was tested. The result was a reduction in noise of 22 decibels. When the radiators were again in stalled the noise rose, of course, but a net gain of 17 decibels remained. Calculation showed that it was not practical to seek improvement with a better barrier unless the radiators could be isolated from the source. Based on these results, work went ahead on the additional two trans formers. Less supervision was given these jobs and when they were tested it was found that thev were three to five decibels noisier than the first. The fault was found in spot contact be tween the enclosure and the trans former. When this was corrected the performance improved. Tests were then made to see if the thermal insulation would cause the transformers to run hot. It was found that second and third stage cooling came into action earlier than before, but prolonged tests also showed that the maximum load did not cause the transformers to run hot. Based on the success of the scheme. Portland General Electric is now planning to treat a large three-phase transformer having the same rating as the whole bank described here. Among the modifications planned for the new unit are enlarged clearance between the transformer and the radiator to ease installation of the enclosure and perhaps give a bit more isolation to the radiator. It is also planned to change the ratio of steel to lead in the barrier. The same weight per square foot will be main tained, but the amount of lead will be greater. In reviewing the original design goals it can be seen that enough trans mission loss was realized to solve the problem. Sound build-up inside the enclosure was controlled. The trans former suffered no loss in capacity as a result of the treatment. And finally, the cost was commensurate with the results. The actual cost of treating this transformer bank was $21,000 -- about 0.8 per cent of the cost of the transformer per decibel of noise re duction achieved. Special low-noise transformers, according to PGE's fig ures. cost 1 to 1.3 per cent on the same basis. The partial solution avail able through use of a three-wall ma sonry barrier and supplementarv panels for the transformer would have cost about 0.7 per cent. Copies of Mr. Adkins' paper before IEEE. "Transformer Noise Reduction with a Close-Fitting Mass Law En closure." are available through Lead Industries Association. Inc. A section of the enclosure ready for installation. It is made up of 10-gage steel, 1/16 inch lead, and two inches of glass fiber spaced off from the inner face. In order to get a good tight fit, fairly complex sections were made. This one, show ing the lead inner face fits just under the radiator. A mirror-image of it can be seen in the picture at upper right. --9-- LIA26312 i How porcelain is working for design engineers Tenacity of leaded porcelain is shown in this photo of a variety of signs in green, red, yellow, blue, and, of course, black and white. Applied on thin aluminum sheet, the leaded porcelain doesn't chip or pop off, even when the signs are bent to fit contours of posts, railings, etc. Many such signs are in use aboard ships, in chemical plants, mines, on highways and anywhere corrosion is a problem. Chemical resistance of leaded porcelain is demonstrated by this application. Also, the fact that these enamels were fired on this heavy aluminum casting proves their versatility. This cap is to be used to seal a chemical tank car opening, and it is important that the instructions be pre served for the life of the car. Excellent electrical properties fit leaded porce lain enamel to scores of applications like the blue and white tube shield cans. Made by im pact extrusion of aluminum, the cans were quickly and easily coated without distortion by a permanent porcelain finish. Also shown are two spools of porcelain enameled wire. Leaded porcelains are ideal insulators -- and they work on platinum, silver, copper and other conductive metals as wel Now that porcelain enamel on aluminum has come of age l it has been approximately 15 years since this superior coating was first commercially applied), many diverse and interesting applications are being made with it. For those who are not familiar with it, this porcelain is similar in marry respects to the porcelain you might find on your stove -- it is basically a glass coating fused on a metal sub strate. In the case of porcelain on aluminum, the glass is fused to aluminum at a temperature of 9201000F., the exact temperature de pending upon specific composition of the enamel and weight of metal. The glass used for coating alumi num varies in composition to fit the intended application, but nearlv all contain lead, silica, lithium, sodium, titanium, and a few other glass making chemicals intimately mixed and often prefused into small glass fragments called frits. Enamelers grind the frits, mix them with a liquid and spray the mixture on the metal. A few minutes of firing in the furnace completes the fusing operation. This 2,/gw diameter impact extruded aluminum wheel is used for the friction drive on an office machine. Leaded por celain eliminated the problem of abra sion to the wheel's edge by a friction belt -- yet, maintained the desired co efficient of friction. Practically unlimited choice of color, great durability, thermal shock resistance, and re sistance to impact all account for leaded porcelain's choice for machinery enclosures and architectural panels. Not only that -- the rigidity of aluminum sheet is increased by as much as 60% by a porcelain coating. The ability of leaded enamels to cover cor ners and sharp radii is demonstrated by both the expanded metal and the simulated wood grain panel. Who made them: Wire by Secon Metals Corp.; Signs by Porcenal and Hamlin-Stevens, Inc.; Plates, enclosures, wheel by Hamlin-Stevens, Inc. 10- LIA 2 6313 *)rt,tene<&twfy OeCeU It S*tcU.,. (Uut dlead Lead abstracts -- not recommended for U,,ht reading. But if you have a seri- "4 interest in current research and oUhlications on technical develop ments. LEAD ABSTRACTS, publi-hecl monthly by the Lead Develop ment Association in London can help %0u keep abreast of the literature of a]l countries. Use the coupon on the back cover to request a sample issue, vour company letterhead if you wish to he placed on the regular mailing list for it. Lead draws the line . . . latest tennis court construction wrinkle is marking the lines with strips of lead. Revival of an old English method, lead is weather and wear proof, and outlasts fab ric and plastic lines. Simplv cut the strip off the roll, nail it down and paint it regulation white. LIAZ6314 CHANGE OF ADDRESS OR NEW iDER Use this side of the coupon if you have recently changed your address or if you would like to be added to the mailing list for LEAD INSIDE THE ANTHILL . . . Ever been curious about the underground cities built by ants? So was Bill Abraham of St. Petersburg, Fla., and he did something about it. By pouring a ladle of molten lead into the entrance of an anthill and cooling the casting with water before digging it up he has managed to make good replicas of the nests. Several are pictured here. He's found quite a variety among the 400 or so types of ants and nests in the ELS. Fingers, like ants, don't survive molten lead very well-- if you plan to experiment, get expert advice. Lead's on the mop ... and this map is on lead! Alfred C. Dunn, renowned illustrator, watercolorist, and Professor of Art at the University of Idaho is cutting a map of the campus into a large sheet of lead. The completed map. decora tive as well as useful, will be mounted for permanent display in the new Student Union Building. Researchers at the Bell Telephone Labs have found some difficulty in soldering heavilv gold plated widgetts for electronic gear. They tracked down the difficultv -- when gold con tent of a lead-tin solder reaches 75 per cent, it becomes brittle, c a u t io n : Never mix scrap gold with vour solder! Lead makes fine fibers finer! Bundles of fine glass filaments that are stronger than a monofilament can be drawn into submicron diameters (less than 0.000039 in.) bv a process requiring a protective metal coating. So far an arsenic-bismuth-lead alloy coating is favored bv scientists working on fiber production at Armour Research Foundation. l CHANGE OF ADDRESS NEW READER (please circle one) From__________________ Name, title Company Street City, zone, state To__________________ Nome, title Company PLEASE CHECK INTEREST Architectural & building Design Engineer Ceramics Radiation Other (please specify) Street Stb /TfeKl-M FftSt BRARY OF TECHNICAL INFORMATION JJUJ \3UJJJV UJJJJJJJ!J VijjJjJ The following publications an available free of charge unless otherwise noted. Send request te ^ LEAD INDUSTRIES ASSOCIATION, 292 MADISON AVENUE, NEW YORK 17, N. y NEW LISTINGS Pools and planters Description and design details of seven modern lead lined pools and planters. Also enumerates advantages and architectural specifications. Eight pages. Isolation of buildings from vibrations Eight page reprint of description of vibration isolation of the Place Ville Marie Development in Montreal. Transformer noise reduction Design, construction details of close-fitting moss-law enclosure for electrical transformers. Ten pages, illustrated. GENERAL Discovering the beauty of lead New uses for lead Design engineering data BATTERIES Electric delivery trucks Truck costs in a jiffy Three nomographs for estimating costs of gas or battery powered industrial trucks. The choice of battery systems CONSTRUCTION Silver anniversary roofs Case histories of 4 sheet lead roofs each with 25 or more years at service. Building construction bulletins 1. Specifications - lead waste connections, plumbing 2. Specifications - lead shower and safe pans 3. Specifications-chemical laboratory drain age systems. Lead work for modern plumbing $2 postpaid, $1.50 per copy in orders ol 10 or more. Profusely illustrated 164 poge text presenting clearly to the plumbing student the necessary tools, procedures and methods. Seamless feme for roofing Sheet lead for roofing and flashing Lead plumbing Lead-asbestos anti-vibration pads ENGINEERING Materials of construction reviews lead and lead alloys in design and construc tion for research and engineering use. New ceramic data Transducers for ultrasonics One page reprint describes operating princi ple and uses. Corrosion data -- lead & alloys Chart presentation of the corrosion resistance of lead and its alloys to 188 common chemical materials. Methods of lead lining tanks Four poge review of corrosion performance ond fabrication methods for lead. Cutting press vibrations Oilless bearings -- helicopters 1000F bearings Nuclear materials Eight page reprint from Materials in Design Engineering. Radiation protection Four page reprint describes shielding require ments for pipe or duct through wall openings. X-ray data -- lead ceramics, part II X-roy diffraction data for 10 lead compound! Five poge reprint. Amazing new spark pump Lead to control sound and vibration FINISHES Decorative finishes for lead Red lead based paint systems Properties and compositions for 24 formula tions and systems for a wide variety of uses and exposures. 31 pages. UPON REQUEST, THE LEAD INDUSTRIES ASSOCIATION Will BE GLAD TO MAIL "LEAD" REGULARLY, FREE OF CHARGE, TO THOSE INTERESTED, AND WILL COOPERATE WITHOUT OBLIGATION IN THE SOLUTION OF YOUR LEAD PROBLEMS. Reproduced by letterpress from lead type. PRINTED IN U.S.A. p u b l is h e r s p r in t in g -- Ro g e r s Ke l l o g g LONG ISLAND CITY 1. N. Y. cow. j Mail to: Lead Industries Assn., inc., 292 Madison Ave., New York 17, N. Y. Name, Title Company Street City, Zone, State I : Please send___ TO REQUEST LITFLIA26315