Document O3J2JK49eDLe9zyyk5oJjvn5j

BIG THINGS IN THE WORKS There are people who have the im pression that battery powered indus trial trucks are used only for dainty little tasks like lifting 6000 pounds of small parts, or clamping onto an 1800 pound roll of newsprint. But it s just that they haven't been to Irvin Works of Lnited States Steel Cor poration near Pittsburgh. In this green valley, there are giants at work! Silent, speedy, but monstrous, these sleek trucks glide about their king-size chores three full shifts a day, seven days a week. The^ pause just long enough to change op erators between shifts, and once a day for a battery switch. In fact, their pace is so relentless that our camerman had to snap his photos on the run! Loads up to 35,000 pounds in coiled sheet are the order of the day and are handled with ease by the ``big ones" at Irvin. They roam the plant in swift strides over wood block floors that cushion their treads. Back and forth, and up and down they go --from rolling to cutting to process ing to coiling, then to bin and ship ping. The stout hearts of these bruisers --the lead-acid batteries--range up to 1250 amp. hour sizes, two to the vehicle, with the average being 1040 2-- -- amp. hours. The materials handling 1 department is now receiving replace ment batteries in the dry charge I state, and so is able to schedule the | inclusion of the new batterv into service at will. Older methods forced installation of new batteries into serv ice immediately in order to avoid shelf loss of energy. } Plant engineering is working on a solution to the problem of standard- ; izing battery container sizes, thus re ducing the variety of physical di mensions and capacitv rating neces sary at present; but, all in all, they still say that 'The batterv bovs do the big things here!" LIA26449 idn swoiioa Interior of one of the lead-lined tanks show ing the cooling coil and heavy bronze agita tor. Some of these tanks have been in service 40 years and still use the original sheet lead. .. after 40 years on the job Fourteen lead lined tanks at a petrochemical plant in St. Louis are no- having their bottoms and part of their sides replaced with fresh heet lead. What is noteworthy about this maintenance is that the tanks have been holding a host of highly corrosive chemicals since they were constructed in the early 1920s. In ad dition to corrosive action the linings also withstood stirring and agitation. Most of the tanks are still using the original ?ie->n. or '''as-in. sheet lead thev started with. The tanks were originally designed for sulfonation of fatty oils. However, as the vears passed, the tanks have been used for blending a wide varietv of chemicals. Among the cor rosives that have been in the tanks are various combinations of the fol lowing: organic acids, sulfuric and phosphoric acids, organic and inor ganic bases, etc. The fourteen tanks are at the St. Louis plant of the Tretolite Div. of Petrolite Corp. They range in diam eters from 8 ft. to 16 ft. and are all 10 ft. high. Cage type construction is utilized on all 14 of the tanks. In this type of construction, a sheet lead vessel is supported by a cage like framework made of steel flats and angles, bolted and welded to gether. Much of the support is given the lead by the stack of flat steel bands that gird each tank. They are closer together at the bottom than they are at the tank top to offset the greater hydrostatic pressure there. The work now in progess consists of replacing the lead bottoms and about six ft. of the lead sides in some of the tanks. At the same time, anv repairs or maintenance work neces sary will be done on the two-in. lead cooling coils or the large agitators in each tank. Larry Goad and Co., St. Louis, is doing the lead work at the Tretolite plant. According to Mr. Goad there are several distinct advantages to this type of tank construction. "Lower materials costs make this type of con struction using ^s-in. or %2'in- lead competitive with other materials and other types of tank construction. And assembly in the field is considerably easier since handling of large, heavy steel sheets is eliminated." In addi tion, he enumerated several other ad vantages. The open framework per mits leaks to be easily found and repaired from the outside without necessarily draining the tank. The outside of the tank can be hosed down to remove corrosives or other dangerous chemicals. Also the open construction makes the tanks effec tive means of cooling liquids that are received hot or where heat is gen erated by the reaction. "And. we should point out," Mr. Goad con tinued, "that this type of construction permits the sheet lead to expand and contract relatively independently of he expansion of the steel frame." --3-- Checting the temperature of a large cagetype lead tank Note that the steel support ing hoops are close together at the bottom and separate at the top where less support Is needed. L I A26450 i'!1  Isotopes at work--1966 Strawberry irradiator Radiation processing of food to halt spoilage and to extend its re frigerated shelf life is now becoming an important practical reality. Grain has been successfully deinfested of insects; potato and onion sprouting has been halted by exposure to gamma radiation from a radioactive isotope, usually cobalt-60. The finned lead source cask showing both the cask and mechanisms that move the source (right). The hydraulic power unit that moves produce through the irradiator is located at far left. One of the most efficient ways of processing produce is to build an ir radiator small enough so that it and its attendant shielding, conveyor, re frigerating. ventilating and instru mentation systems can be hauled to the harvest area on a flat bed truck trailer. This can change the whole distribution set up when the produce can be irradiated as it is packaged and shipped to markets that may be as far awav as the other side of the United Stales. For example, fresh strawberries harvested in California now have to be rushed across the continent in costly high speed serv ice refrigerated railway cars, distrib uted and sold in from four to six days. * Mow, a new mobile irradiator is being started up and checked out by the University of California at its Davis Campus that will double the berries shelf life so they can travel by conventional refrigerator car ship ments. Equally important, spoilage will also be cut from 15 to 25 per cent to as little as 5 to 10 per cent. The Mobile Gamma Irradiator (MG1) was designed by Vitro Engi neering Co., Div. of Vitro Corp., who also supervised the actual construc tion of the irradiator and shielded source cask and other shielding by the Lockheed-Georgia Co. Sponsor of the project was the Department of Isotope Development of the United States Atomic Energy Commission. The mobility concept in irradiator design has already been described in LEAD.* However the MGI source configuration and intensity, mechani cal handling technique and the over all irradiator configuration is differ ent. The cask can be removed from the main irradiator body shielding and serve as the shipping cask for the co balt-60 source at time of initial startup and again at two year intervals when the fuel has to be replenished. The source cask and main body of the irradiator are together approxi mately 16 ft. long. Both arc lead filled steel weldments. The 13-ft. long. 45 .. ft. wide main body weighs approximately 80.000 lbs. Cooling coils carrying brine at approximately 30F are embedded in the lead. The source cask is slightly o\er 4-ft. long and 4-ft. wide. It weighs approximately 15,000 lbs. In operation, the irradiator can process approximately 1,000 lbs. of produce per hour and irradiate them with a dose of from 175,000 to 225.000 rads. An irradiation cycle starts with the cobalt-60 source in position and aluminum carriers containing the strawberries coming through into the truck on a conveyor belt. When they reach the outside of the irradiator they are elevated into a shuttle. This shuttle is then moved into the irradi ator body by a hydraulic cylinder. * "Hot Potatoes", LEAD, 1965, V.29/No. 3 Once inside the irradiator carrier is moved over and u radiating source. On comp total irradiation time, whit from product to product, th is withdrawn from the i bodv. The product carrier deposited on an output elevato lowers it to an output convey output conveyor returns the carrier to the loading station workmen return it to refri storage. Isotope sterilizers for biomedical use Radioactive pharmaceut among modern medicine's must be sterilized since ther used within the human bodv in noses and treatments of man's stubborn ailments. Sterilizatio turn, creates the problem of shi the sterilizers so that operator work in safety. IX hen Abbott Laboratories. J Chicago. Illinois, were faced this problem, their scientists turn engineers with Wigton Abbot! pany at Plainfield. Mew Jersey the American Sterilizer Comp Frie. Pennsylvania, for the design manufacture of completely shie sterilizing equipment and the de of the complete area. pvt American square pressure n sterilizers were specified for E job. These sterilizers were rein a wall fully lined with l/j" tri lead. An overlapping frame de of 1 thick lead was fitted to r exterior of the door. The necesilv exposed hand wheel and lockarms were shielded by a nrk sheet lead on the inside of the 1 tor. Isad was the shielding material -wisen. stated an AMSCO spokesLn. because ``its density provides re radiation shielding per unit of r.iikness than any other available |..id-rial. It is also rasv to fabricate 4 adapts to existing equipment a! minimum extra cost.'' J** bank of five sterilizers for radioactive recessed into a lead lined wall. LEAD SPEEDS HOSE PRODUCTION Newly extruded rubber hose, seen on the pens at the right, go through the weaving machines (behind the spools) and exit with a tightly woven fabric casing. A new half million dollar lead cas ing facility is helping the National Hose Company, Dover, N.J. encase long lengths of reinforced rubber hose in lead and ready them for vulcaniza tion as fast as batteries of rubber extruding machines and cord braid ers can make the raw constructions. In the process lead serves actually as a tool--rather than a material-- that is usable over and over again. The only "wear ' or depreciation on this tool is the small amount of oxide formed, which is skimmed off the molten metal in the melting kettle as dross. Heart of National Hose Company's new equipment is a giant lead press, one of the largest in the l nited States, capable of encasing 3.000 feet of 3_j-inch hose without recharging. In making the reinforced-rubber hose for pumping gasoline, solvents, and chemicals, a "construction'' is firs! built up with suecesssive layers of uncured rubber and braided or wound textile cord or wire. The assembly of uncured rubber and reinforcements must next be cured, or vulcanized to harden the rubber, and cause it to grip to the reinforcement plies, and give the hose its permanent shape. But before uncured hose can be placed in a vulcanization chamber its shape must be preserved. Here is where lead is used. Lead's low melting point, and its easy formability make it an ideal reusable en casement material. A length of new hose construction to be encased is threaded through the die in the press. Hydraulic pressure, forces a billet of lead into the die cavities and uniformly around the hose. Unalloyed lead is used, to give the maximum formability. Under the pressure of the plunger, the lead is at a temperature of approximately 375F when it contacts the hose in the die. .L A spool of lead-encased reiniorcedrubber hose being moved into e vul canization oven. The oven is steamheated to approximately 300F. \ ulcanization is accomplished with steam heat at 300F. A vulcanization cycle requires 45 min. Internal water pressure is used during vulcanization to keep the internal face of the hose from blistering or collapsing. In addition to giving National Hose, wholly owned subsidiary of the Davco Corporation, capacity for increased production, the lead-encase ment method lowers production costs and minimizes defects. LIA26452 Office Planning & Design: Rodgers Associates, New York Associate Architects: Eggers and Higgins, New York General Contractor: Gilbane Building Company, Providence, R. I. Gypsum partition & lead barriers: Wallboard Construction Company, East Natick, Massachusetts Isometric showing light sheet! barrier hung from slab and head of partition below. QUIET PLEASE! The term "astute" is one we very frequently find associated with bank ers. They have to be. The sagacious use of the money entrusted to them is the hallmark of a successful bank ing operation. But what happens when operations involve their own funds? Would they watch construc tion of facilities to house their own affairs with the same scrupulous care given to investment of funds intended to yield a calculated return? A good place to find out was the new quarters built for the State Street Bank and Trust Company in Boston. This handsome tower, whose ma jor tenant is the bank, designed by Pearl Street Associates, a joint ven ture of F. A. Stahl and Associates. Hugh Stubbins and Associates and William J. LeMessurier and Asso ciates. is 34 stories tall. Built of con crete and glass at an approximate cost above S30.000.000, its superb lo cation is intended to provide close contact with the patrons and business interests associated with the hank in Sheet lead barriers before installation of par titioning below. Note ease of joining inter secting surfaces, taping vertical joints and sealing penetrations. this area for many years. Interiors for the bank were designed by Rodgers Associates of New York City whose attention to detail was matched only by the supervisory per sonnel of the bank itself. No item was too small to escape the scrutiny of this team for use, appearance and economy without sacrifice of quality. Office partitions were one of these items. Carried only to the hung ceil ing height, they were terminated at that point in order to enhance flexi bility of partition arrangement. There were two types of partitions used in this job: one a standard metal partition, the other a gypsum laminate. In either case the problem of passage of sound up through the ceiling, over the top of the partition and down through the ceiling on the other side was of paramount impor tance. There are several systems pos sible to use in solving this problem. The most recent, inexpensive, effec tive and more increasiriglv used, is thin sheet lead hung from the slab and dropped to the ceilinJ juncture with the partition Lead's capability for sound ation is well known. Its comS of limpness, mass and forma preeminent. A total of aboutl square feet of one pound shl barrier was used. Installatif lowed specifications included Industries' bulletin: "Practid plication of Sheet Lead for I Barriers." Desired lengths lead, about three feet wide, wj several inches longer than tance from the slab to the top. These were then folded < wood battens and attached tol cleats fastened to the underside! floor slab above. About one iij drape resulted at the bottom served as a seal over the par] head. Penetrations through this were easilv handled with no more than a scissors to provide or apertures for pipes or ducts of duct tape were used to seal Plenum sound barrier using easily fw sheet lead, cut and snugly taped penetrations and folded into tight v panel joints. CLEAT- WOOD BLOCKING --FASTEN TO SLAB m- ,HUNG CEILING -------- 1-------- PARTITION _ "TO CEILING View of the Gibion R.R. Bridge showing some of its 3150 tons of structural steel. Corrosive industrial atmosphere per* vades the area, severely testing the best of paint systems. INDIANA TESTS A NEW LEAD CORROSION FIGHTER i fa cut sheet around these after , passed through. This latter ition is of particular importance m 0f the need to eliminate - potential path for sound leak er "flanking" around the barrier, ^flinty duct sealing tape is ade*te for this purpose and easily ob- ^.31e. Some care is essential, of course, . get the best from the sheet lead iirrier. But it is easier to do a good i with it than with most competing iteriah. The big factor in lead's Ijjvor is its ease of working. In fact, Elbe Wailboard Construction ComIwny of East Natick, Mass., partition Tmitractors at the bank, were quick J lint out that the job was faster rcheaper than if they had used 1 aider methods in place of the lead. |\nd the pleasing bonus for contracItor and bankers alike is that the per formance of the lead, based on pre- ous field tests, will be substantially Ktter than if the other materials had llwen used. To the maintenance engineer, fight ing rust is like running on a treadmill --he has to run hard just to stand still. So naturally,word of a new cor rosion inhibitive paint is good news. But how do you tell if a new paint is good? That's another story. There are salt spray cabinets, fence tests, and numerous "accelerated" tests designed to indicate how well a given paint system might function on the job. When it comes down to the final analysis, however, there is no tougher assignment than maintenance. And that's just the task assigned to tribasic lead phosphosilicate by Mr. F. S. Hill, Chief, Division of Maintenance, Indiana State Highway Commission. After extensive prelim inary testing, the Indiana State High way Commission let Maintenance Contract M-6694, which covered the painting of the steel truss on State Road #152 over the Gibson Railroad Yards. The contract called for appli cation of two coats--the prime coat being red lead (Indiana S103, Type 2), and the finish coat pigmented with 3.4 pounds per gallon of tribasic lead phosphosilicate (Indiana 64-35). In July, 1965, Jordan Paint Manu facturing Company, Inc., Forest Park, Illinois, began making the paint, and in August, the contractor, Northwest ern Industries, Inc., of Gary, Indiana, began applying it to the Gibson Bridge. In all, about 3,000 gallons were used. Of course, with each pass ing month further proof and testi mony is gained as to the system's corrosion-inhibitive effect, but results on the Gibson Bridge so far have been so promising that the State of In diana Highway Commission s Divi sion of Maintenance has indicated ad ditional bridges are being considered for testing. For the typical formulation of a tribasic lead phosphosilicate paint, such as that used by the Division of Maintenance on the Gibson Railroad overpass, see the table below. INDIANA 63-35, GREEN BRIDGE PAINT pl an n in g f o r in t er io r 3UND CONTROL by Sydney G. Rodgers, office planner for the State Street Bank, is a paper pre|*ented at the Lead Industries As- elation annual meeting, March |3l, 1966, at St. Louis, Missouri. [This informative piece is available to the reader, free of charge L IA 2 64 5 4 Pigment % Maximum % Minimum (tribasic lead phosphosilicate, TiO,, mineral extenders and tinting colors as required.) 52.0 50.5 Vejiicle (raw linseed oil, alkyd resin) 49.5 48.0 VehicleNon-_volatile 64.0 62.5 Non Volatile Paint by Weight " " " " Volume 82.5 65.5 81.5 : 64^5 -Weight per Gallon 13.1251b. 12.75 1b. heorefical coverage per gallon at 3 milt dry film fJitcfcnes*...,,........................ _......... . ..345 eg. if. Three Terne Roofs Welcome the Publh The unusual, multi-triangular roof design of the Youth Club of Cape Coral, Fla. is emphasized by the horizontal lines of Ber muda seams. The 22-ft. high center is topped by a cone shaped translucent sky light rising another 10 ft. Architect is Wil liam C. Kreidt. Terne roofs are one of the w q \ skilled designers get "that extrj something" in buildings that mu$ be attractive to the public. Shee terne (steel coated with lead alloy] lets architects make the roof adc accents and strong patterns witf such devices as batten seams, deer eaves and steep pitches. Terne i$ also an excellent base for paint] thus giving the architect additional] design freedom. Here are three ex-] amples of the inviting effects archi-j tects are getting with this tradition-] al but lively material. Interior court of the Snow Flake Motel, St.W Joseph, Mich, showing the blue painted^ saw-tooth roof which encircles the star shaped motel. The strong lines provide a highly dramatic effect and a constantly changing shadow pattern. Architect is Wil liam Wesley Peters. The San Joaquin Country Club, Fresno, Calif, designed by Walter Wagner & Part ners. The pink hexagonal roof and cupola are emphasized and restated by the hori zontal seams. The cupola conceals the kitchen range hood, boiler flues and other utility pipes. Terne metal in all buildings by Foliansbee Steel Corporation, Foliansbee, West Vir ginia. LIA26A55 !i ;N -and your lawn is cut! ^ World ^ ar I air ace with a nosylgic turn of mind could close his fyes most any summer suburban Sat urday and imagine he was back on the tarmac amid a squadron of Nieuports or Spads warming up for pa trol. In fact, the sound of an 18-inch rotary gas mower rounding a tight turn may even bring a picture of an serial dogfight to your mind -- whether a Fokker D-7, a P-35, or a Corsair F4L is your idea of a vintage plane. But nostalgia wears thin with three dozen lawns-to-mow within hearing range and roughly six mow ers running at any instant. If for no reason other than noise, people with lawns to mow ought to look at electric mowers. And if they do look, and also consider cost, durabilitv. ease of use, and power, a good many of them still will change to almost silent, battery-powered mowing. Noise, or the lack of it, is the first thing you notice, of course. The spinning blades are driven by an electric motor and a "whoosh" like that of a powerful fan is all you hear. But start-up is also a revelation-- especially if you are accustomed to a balky gasoline mower--because there is no wrestling with starter cranks, chokes, throttles or other dodads. When you want a battery mower to run you switch it on: when you want it to stop you switch it off! The initial cost of a battery moweT is about the same, or a little higher than that of a quality gasolinepowered machine. The real economy of a battery-powered mower is that there is nothing to wear out! Oh, the blades have to be sharpened, of course, and replaced when they are ground down to the nub and the bat tery has to be replaced with a stan dard automotive battery every sev eral years, but there are no wearing parts to compare with piston rings, valves, mufflers, plugs, and all the other gas engine parts that go oneby-one after the first season. In a try-out of one battery unit, it breezed through 8000 square feet of lawn and lot. More than 1000 square feet of it was a weedy patch not touched previously that season. The mower slashed its way through with out stalling or running out of pep. The electrical power to recharge the batterv was closely checked. It was less than 2c! EL-IAWN-TRIC Electro-Life Industries Inc. p. O. Box 7044 Milwaukee, Wisconsin 53213 Simple and smooth operation are kev features of the EI-lawn-Tric rotary ISinch mower. It is, of course, quiet anc easy starting as any battery powereC mower. The DC motor of this unit Is built by the manufacturer for use in mowers. Having been designed for this service it is highly efficient and the special bearings employed are selflubricated for long life. Recharging is quite simple since the mower has its 3'/2-amp charger built right in. And the lightweight construction make mowing easy enough for wives and teenagers to handle. LAMBERT WHIZZ-Pur Lambert Incorporated 519 Hunter Avenue Dayton, Ohio 45404 "Quiet as a whisper" says the manufac turer and claims that the mower cannot be heard 20 feet away. In fact, a safety indicator is included to show when the mower is running. In addition, it features a height adjustment control at the han dle and has staggered wheels to mini mize any "scalping" on uneven patches of the lawn. Another feature of this 19inch diameter rotary is that the motor is mounted on nylon bearings so that it "floats" for continuously adjustable height control -- even when it is run ning. The charger and its cord are selfcontained for maximum ease in charging. PINCOR Model P9I2 Pioneer Gen-E-Motor Corporation 5841 West Dickens Avenue Chicago, Illinois 60639 This is a 20-inch diameter rotary whose front discharge chute allows it to work right up to trees, walls, and fences. Safety key starting switch is standard, of course, and the operation is typically quiet. The one-piece alloy steel blade provides a suction lift for making the grass stand up in the cutting process. Instant height control is built-in so that by simply moving the control lever, the blade may be moved anywhere in the }% to 3 inch height range. The rugged 12-volt battery drives the motor with over 1200 inch ounces of torque. Charger is included. LI A2M56 Automatic Soldering * Shaves Costs at Schick X Solder coafed brass strip from which end caps are blanked and soldered to the Schick razor shown at left. Millions of solder joints--reliably and economically. In a nutshell that describes the needs and aim of Thomas Bombero. Chief Design En gineer at Schick Safety Razor Co., when his company planned introduc tion of a new razor model recently. In assembling the razor, a car tridge brass end cap was to be joined to each side of a "spider" that sup ported the blade. The cap served two purposes, esthetic, and as a brace. For joining, solder was required only on the inside. Placement of even a preform would have been difficult-- and since it would require hand labor --expensive. Mr. Bombero's solution to the prob lem, worked out with the engineering assistance of American Silver Com pany, was to stamp the end caps from solder-coated strip. Enough solder, 0.004-in. thick, is integrally pre bonded to 70/30 brass strip to com plete a joint without additional solder. Of course, a major hurdle still re mained before production could commence, Mr. Bombero was unable to locate any machinery on the market that would do the soldering job. Herein lies another success story, for he finally perfected a machine that can out perform even the most am bitious production requirements! At High-speed automatic soldering machine de veloped at Schick Safety Razor Company. Millions of razors are made each year using two solderclad end caps of 70/30 brass. In final step, en tire metal portion of razor is chrome finished to improve appearance and eliminate corrosion. LI* 26457 what might be termed cruising speed, the machine turns out finished ''spi ders'* one-per-second. Deceptively small for the Gargantuan task it performs, the soldering unit measures about 12 feet from the point where the "spider" enters onto a keyed belt that locks it into posi tion. to where a finished unit with two soldered end caps drops down a cool ing chute into a metal storage bin. The reject rate for this stage of the operation is practically nil. and since the machine's operation is exceed ingly simple, unit cost; are quite small compared to some other method of joining. Of course, a great many hours went into the development and construction of the soldering unit, and as testimony to its completeness, Mr. Bombero points out that a second unit was built shortly after the first with practically no modifications. "About the only change was to flatten the angle on a wheel which applies flux to the spider ends--but even that change has been questioned' , he says. Concerning the use of solderclad strip for the end caps, Mr. Bom bero says, "Use of this material eliminated the guesswork and vari ables usually associated with making such blind joints and has insured the high quality control standards set by Schick." Miles of this strip, about kU-in. wide, are now furnished to Schick by American Silver Co. , j > ( , I / fjut&iettitufr OdeU 7t St*U a&out ^tead ^ banquet recently held in Lon don celebrated the 600th anniversary 0f the founding of the Plumber's guild- The King's Plumber sat as the respected head of one of the most ancjent of the Livery Companies of the gitv of London. The earliest record 0f g charter was in 1365 and required that each plumber be a Freeman. 5ince most Guilds had their origins jn religious fraternities, the Plumbers took Saint Michael as their Patron. No weights of lead could be wade or sold without being first impressed with the image of Saint Michael. METROPOLITANThe NaMerl Astoria Hotel stands two inches clear ot the sidtwak, and one can actually see under It. Mafic? Net really; the hotel's 42 story twin-tower structure is supported hy lorty-eifht steel MARVELS cohwns sunk eifhty feet and restint an iratn-proaf lead cushions at bedrock. Because the New York Central Railroad runs under Park Avenue, the hotel |Nke other structures built over the tracks| has only a partial basement, and must "apart'' its steam and electricity; the kitchens art on the second floor and the wine cellar to the fifth floor. It is estaated that the Waldorf could accommodate 10,000 persons at one time m its 1900 (nest rooms, famous Brand Baflroom, and the numerous kanpoet rooms and restaurants. mw io m 0<u VUwn Oipekt This interesting car card is currently appearing in most of the 4,225 buses of the New York City Transit Authority. Great importance was attached to "good and honest work'' bv the mem bers and Guild Officials were em powered with rights of search to discover and punish any breach of the privileges of the Company. If a plumber were found practicing with out proof of at least seven years' ap prenticeship he w as fined. If a helper armed on the job without hammer, knife and shave hook he suffered a penalty of four pence subtracted from his wages. CHANGE OF ADDRESS OR NEW READER 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 The country's first major suspen sion bridge was swung over the Ohio River at Cincinnati one hundred years ago. Reference was made in the con struction specifications for that bridge to red lead paste mixed with linseed oil to pack the wires that formed the cables. Over 5000 gallons of the same red lead paste were used to pack the w ires of New \ ork City's huge YerrazanoNarrows Bridge, opened in 1964. Tube drawing's a cinch w ith ultra sonics. Shown here is a eommercialiv available ultrasonic tube drawing sys tem that uses lead zirconate titanate transducers to activate a back sup ported plug. The high frequency (over 20.000 cps) vibration reduces fric- tional forces between work and the plug, plus increasing plasticity of the metal passing through the die. The manufacturer. Aeroprojects Incorpo rated. est Chester, Pennsylvania, says size control is better, ID surface finish is smoother, and thin wall tub ing production is routine with ultra sonic plug drawing. r---------------------------------------------------------------------------------------------I I CHANGE OF ADDRESS ADD ME TO YOUR MAILING LIST I (please circle one) From-----------------------------Name, title Company Street City, state, zip code To----------------------- ------- Name, title Company PLEASE CHECK INTEREST 0 Architectural & building Design Engineer 0 Ceramics 0 Radiation 0 Other (please specify) Street NEW LISTINGS New developments in soldering equipment and methods Five new soldering techniques are de scribed and shown. Best features of each are indicated. Four pages. Classification of inorganic enamels Two part description of inorganic glass enamels and application techniques. Three tables, six pages. GENERAL Lead & zinc supply and demand Authoritative examination of the short and intermediate supply and demand prospects for lead and zinc. Thirty-five pages. Annual review--lead 1964 New uses for lead Design engineering data BATTERIES Something new to know about battery power New developments increase capabilities of battery trucks and truck programs. Picture book of power batteries Industrial truck costs in a jiffy LIBRARY OF TECHNICAL INFORMATIO LUiJJJUJ VL!jjjy UJJiM-LlU \Ij] i iic iwnuwiii| puLHivaiuma LEAD INDUSTRIES ASSOCIATION, 292 MADISON AVENUE. NEW YORK, N. Y \ CONSTRUCTION Lead to control sound and vibration Isolation of buildings from vibration Three reprints discuss a number of case histories of the use of lead-asbestos pads to control ground-borne vibration. Ways to reduce press vibration isolating cooling tower vibrations Practical lead sound barriers Twelve page manual gives specific wall constructions and performances. Lead roofing and flashing Sixteen-page handbook gives all standard lead roofing systems. High-temperature lead joints Waterproofing with sheet lead Pools and planters Lead work for modern plumbing $2 per copy; $1.50 for 10 or more. ENGINEERING Soldering alloys Where to use terne coated steel Four page reprint summarizes new indus trial uses for terne, a lead coated steel. Modern chemical construction Method of lining lead tanks Use epoxies to line tanks with lead Cleaning "hot" parts ultrasonically Piezoelectric transducers Importance of lead in glass New electroceramic data Lead sheathing for power cable Materials of construction review Corrosion data--lead & alloys Nuclear materials Radiation protection Anodes for cathodic protection FINISHES Follow the safety line with chrome yellow Formulations and suggested applicati for chrome yellow safety paints. Ei pages. Lead paint systems for bridges Two reprints Decorative finishes for lead Red lead based paint systems Porcelain enamels: For aluminum low temperature steel Molybdate opacified enamel Glazes for brick 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 PBIJ'fTXD IK L'.S.A. 287 Reproduced by letterpress from leod type, g d id e -k a l k h o f p s l -r e , me rrrw t o r e . k . t . A , Mail to: Lead Industries Assn., Inc:, 292 Madison Ave., New York, N.Y. 10017 iF Name, Title c Company S I Street c 1 i City, State, Zip Code . Please send______________________________________________ LIA 2645 9 TO REQUEST LITERATURE