Document ppwjg2mBR4pzB5vjBZ0dG0axE

Cgaute pec A to T* ZapotitTltr^"'} Tiaitenc(\ ?. yTppn df.. ,, v >__ Xochlmilco TTil^4h. ua.cr- San GragdtaiTAtlaDufc -- r*piciinipn* kttifc(J^rw^rhuico,N. n Matao Xaipa* ^Sn Juan ixtayoaoar Tin-Lead Alloy Speeds Printed Circuit Board Manufacture Considering the millions of compo nent leads which are soldered to cir cuit boards each day, it becomes obvious that anv improvement in soldering or assemble processing can mean big savings to the volume man ufacturer. Camden Wire Company, Camden, New ''lork. manufacturers of copper wire used as w ire leads for capacitors, resistors, and other electronic com ponents for printed circuit boards, are able to effect such processing im provements by electroplating the wire with a tin-lead allov so that the actual manufacture of the boards will be easier and faster. Plating of the wire with this alloy enables board manufacturers to more easily dip solder the already assem bled board. This is a result of the improved concentricity and uni formity of coating thickness com pared to other tinning methods. Camden produces plated wires in sizes ranging from 16 to 26 A\^G. Capacity ranges from 50 to 500 feet per minute dependent upon the thick ness of the plate. Thickness of the coatings range from 300 to 500 mil lionths of an inch. At Camden the procedure is auto mated as follows: From 5 to 20 reels of copper wire are fed into the entryend of the electroplating line at which point the wire is first electronically cleaned. The second step consists of an acid neutralizing bath to remove the cleaning salts. And finally the wire is fed into the electroplating solution. The electrode used in the electro plating bath consists of a 20 to 35 pound tin-lead alloy anode. The anodes are made by Camden. These are melted and alloyed in an elec tric furnace and ladled into molds to form pigs of the desired size for the particular plating machine for which they are intended. ^ eight of the pig is dependent on which machine in which line is involved. A typical anode lasts approximately 10 days. One of two electroplating lines at Camden Wire used for coating copper wire with a tin-lead alloy for easier manufacture of printed circuit boards. Lead Fiber Glass Combination Silences Air Conditioning Noise dl,rrl ;1ir conditioning is unques- V a ('0ml",rt and often. a ncccssitv. annovingly noi-y. for this althe are l hiteet made sound insula- ,_i 111ia 1 part of the construction o,,, m.u S 10.000.000 Medical I":,,;,.; i..TM itv in Clc\eland. Several thousand n,,i-\ raltlinE air conditioning ducts hardi\ haw provided the ideal atmos- ill pie I rh(1I me teaching of medicine, dentistry nursini'. The <,ri2ina1 specifications for the com;T'\ 1 ,||,.d for a duet wrapping of 1 >" t nek liber lass blanket covered with :T4" plaster over metal lath. However, knowl- , 4 ,ither installations }>1 us some on- n-carch convinced Richard Wilson, inreman for the Parker-Fallis Insulation t ,,mpanv. Inc.. Dallas, sub-contractors for ih,. insulation phase, that a 1" fiber glass Manket and Mb. sheet lead l 1/64" thick) mnikl do the job with less labor and equal ciTrctiveiiess. In actual fact, the lead sheet-fiber glass material and installation cost proved to be iine-third of what the originally specified plaster harrier would have cost. And the installation was relatively simple. (Tot-land Fabricating. Inc. laminated 1" liber glass to a 1/64" thick lead sheeting in rolls 36" wide and 35' long. The rolls ere delivered to the job on skids. The Parker-Fallis ten-man crew then completed the installation. The sheeting was installed mi three sides of any duct when the fourth side abutted against a concrete ceiling or wall. ^ here the duct was completely in the clear, it was wrapped on all four sides. Using a conventional installation method, the lead and fiber glass laminate was affixed to the duct bv forcing it over projecting -tads or stick dips. These had previously been fastened to the duct surface. The lead and fiber glass laminate was then held securel y in place by means of lock nuts or speed washers slipped over the studs. The sound attenuation system involved the use of 44.000 square feet of lead sheet ing around the duct work used for air con ditioning and ventilation. Twenty-one sepa rate fan systems feed the three-building and garage complex. The three schools, Medicine. Dentistry and Nursing, all have total year-round air conditioning controlled from fourteen equipment rooms. Fan motors ranging from 44 to 100 hp gener ate the noise and vibration that dictate the sound attenuation svstem. As for the effectiveness of the system, two views: Mr. E. H. Parker of ParkerFallis estimated that the svstem cost thirtyfour cents per square foot as opposed to an estimated one dollar for the plaster bar rier--a saving of S30.000 to the school. Mr. Parker savs. "The use of fiber glasslead sheeting is the cheapest and easiest to install and it does the job best." M r. Ben De John. Director of Physical Planning for the l niversity. reports that the svstem has proved highly effective in the reduction of what would have been a disturbing noise level. "To date, not one complaint ha^ been registered about noise from the air conditioning svstem." Exterior view of Medical School complex. Seven-story School of Medicine at right. Garage roof promenade between buildings. Cioseup view of an installation showing the speed washers holding the sheeting to the stick clips. Also shown is the use of outward clinching staples to hold two pieces of sheeting together. LOCK MASKER OR "SPEEDNUT" " r 1 : John Uilliam- A A--oMati Cleveland Con: inng Engineers: Bvers. Urban. Klug & Pittenger, Cleveland Builuer: Turner Construct) i Co., New York Lead Work: Cleveland Fabricating, Inc., Cleveland LIA2 65 9 Inc.. 3 Power and Passengers Trak 7 Over 130 miles of lead-sheath cable contribute to efficiency of new subway system. As with all large cities c\ervwhere. Mexico Lite was laird with an inerrasiiu: problem of mass Iran-portation. I tili/ing all tin- experii in i' acquired hv operating subwax s\slrms in other dtie. the Mexican !' ederal District Department dexisod an electric transportation "ML! HD that easilv classifies as one of the fastest, high capacity and efficient -vstems in the world. When totally finished, the subway will consist of three separate hut interrelated lines totalling o u t 20 miles in length with 50 stations. The basic unit for the subway is a 9-ear train accommodating 1500 passengers. The ears themselves are naturalh of the latest available sub way ear desian. Stations are singular in their carefullyplanned attention to eye-appealing esthetics as well as tile most modern construction and layout. The stations were wry carefully planned since it is the intention of the s\'!em~ designers that these terminals project an ac ceptable imaee of the system to the riding public. Sub-soil conditions in the Mexico Citv area presented construction problems of unusual complexity. The soil ueneralK is a soft, hiah-plasticitv, sensitixe. highlv-eompressihle and expansixe clay. Ground levels, of course. \ar\- I'onsiderablv from locale to locale. The area is hisloricallx subject to earthquakes so that compensations liad to be built into the system to accommodate such possibilities. And finallx. soil conditions include a degree of moisture which had to be taken into consideration in planning the all-important electric power system. 1 nderuruund tunnel construction for the Mexico Citv subway was rejected as economically unfeasible because of the unusual characteristics of the sub-soil. As an al ternate. underground structures are actually reinforced concrete structures built in open excavations of minimum depth and width to meet design specifications. The oxerall control center for the system is located in a sew n story buiidinu in central .Mexico Citv. In addi tion to containing the centralized control equipment for operation of the system, it also contains the necessary controls for distribution of the electric power on which the sv-tem is run. Totally computerized, the control sys tem is capable of virtually instantaneous decisions. >uh-soil conditions and the imperative need for flexi bility were major determining factors in selecting leadsheathed cable for the entire system. Lead's characteris tic imperx iousness to moisture or corrosion, its flexibility Much of the lead sheathed cable used on the "Metro" is carried in cable trays ^rollers ca to the walls of the subway system. console lo L I A 2 65 96 \rst Class in Mexico City Subway s mo*TMrilers can see at a glance the position of every train and switch of the system from ** tonsole located in the central control building. and its lung life when exposed to acids and salts in soil water Idled the bill for the system's specific requirements. The table selected was a 3-rore. sector conductor. 300 Mem. cross-section type, with a rating of !5ky grounded neutral and 100 amps. Altogether, over 130 miles of cable were supplied in shipping lengths of over 1200 feet. Out side diameter of the cable is about 21;; inches. All cables for the system emanate from the central control building and. following the three routes of the subway system, feed the rectifying stations and the pas senger stations I for lighting i. The longest cable route in the system is just o\er 0 miles long and although it contains cable splices, it is not sectionalized. At the cable exit of the central control building all du rables are installed in the main cable gallery. From there they branch off along the different routes and are in stalled in one of c arious w avs. Depending on the spec u.i construction requirement of any given locale, the cables are installed: 1. On cable travs on the side walls of the train tunnels. 2. In a concrete trench fdled with sand, in-between the two track lines where tracks run above ground. 3. In underground duct banks running parallel to the subway lines. The cable joining method used throughout the system is the electrical resistance wipe joint. Four soldersealed joints are used to seal the splice sleeve to the cable sheath. The sheath area to be soldered is first tinned with a torch and solder stick. A loose-fitting lead reducer is then slipped over the sheath and tightened to induce capillary flow of the solder. A heater wire wrapped around the lapped joint raises the temperature evenly to the melt point of the solder. Solder is then fed into the hot joint to capacity. ^ hile the joint is cooling excess solder is wiped away. Perhaps the most significant aspect of the extensive cable joining installation was that it was performed by unskilled personnel who were trained specially to perform this job. Assured of a highly reliable electrical system. Mexico City's subway trains travel their modern, quiet wav on a combination of pneumatic tires and flanged wheels. Guide wheels keep the trains on the tracks. With this new system Mexico joins Paris and Montreal in having tin operation I one of the quietest, most efficient under ground mass transportation systems in the world. And lead is there! LIA26597 Personnel Protected Against Radiation Hazard by Lead Shielding 1. Prototype lead-shielded curing rooms have been developed for the automo tive industry. They are 10' x 6' x 6' with sheet lead shielding (Vi" thick). 2. This lead-lined inspection unit enables hardware manufacturers for America's space program to accomplish X-ray inspections for flaws in complete safety and in 85% less time. 3. This 19" x 18" x 17" safe has a lead door and 2" thick wall liner storage of radioactive isotopes. 4. The special materials that have been developed for radiation protects elude this combinaion of V-shaped lead bricks with an intermediate lay*' boron-impregnated laminate. Advances in medical diagnostic and treatment techniques, involving the in creased use of X-ravs. cobalt and other radioactive materials, have brought with them the increased need for pro tecting operating personnel from ex posure to dangerous levels of radi ation. Industrial use of radioactive iso topes. X-rav machines, accelerators and electron beam welders have neces sitated. as well, elaborate precautions to reduce overall body burdens. Even though other materials can be adapted for this use. lead continues to he the most efficient protective shield for most of these applications. Among lead's advantages are its greater densitv i hence, less volume for a given shielding ability I and its imperviousness to contamination even from continuous exposure to radi ation. How lead is most effectivelv used for radiation shielding depends entirelv on the given situation. Lead alone, as sheet or bricks, or in com bination with other materials as a laminate are all now available to ac commodate given needs. Lead and Boron Mixtures A high-flux radiation room used for the study of the biological effects of neutron radiation, as an example, is lined with an inner laver of lead for protection against gamma ravs. and an intermediate layer of a boronimpregnated laminate that shields against neutrons. The lead is in the special form of \ -shaped bricks that overlap to offer complete protection from the poten tial escape of "straight rav " radiation through the joints. This lead shielding captures the decaving gamma ravs and provides the necessary reduction in the dose rate--in this instance 1 200th of the level that would exist without the use of lead. Another material consists of a lead powder, boron and polyethylene mix ture in a basic rectangular brick form that provides a neutron/gamma shield. Among its numerous special advantages are its availability in many special configure.ions and its ready machinability. When temporare- shields offer the solution to the protection problem, this material pro vides an easy answer, as do the lead bricks previously mentioned. Quality Control for Space Exploration When part of the hardware used in America s space program posed a critical quality control problem, X-ray blocking sheet lead helped solve the dilemma. A special 8-foot high leadlined enclosure was designed within which instrument units can be X-rav inspected for possible flaws without any potential danger to inspectors and other participating workers. The new inspection unit also provided a time boon in that it cut radiographic time of individual inspections from 30 to 4 hours. Open-tc speeds Protection for Commercial Radiation Curing process materials engineer ing experts predict that by 1975. lU to 20fir of the industrial finishing done in the L nited States will rely on some form of radiation processing. Clearly, lead will plav an important part in the development of safe equip ment that will fulfill this prediction. Various radiation curing devices already exist, including an electron gun mounted in a lead-shielded cham ber that has vast potential for the automotive industry. The lead-shielded area replaces the conventional curing o\en. In the room is a 300 kv electron gun which scans the painted material. Curing takes place literally in seconds and the heat generated in oven curing is eliminated altogether. Meanwhile, personnel are protected from the radiation by the shielding. "* aerial ind>cates nt,v cowered LIA265 98 Open to the-vew paviliion cars capable of handling 6 passengers traversed the fair grounds at speeds of up to 9 miles-per-hour. Seen here is the Switzerland Paviliion. Japan - h 0t the fa,r Srounds at E-XPO '70. Osaka, Us "ndicates *he vast ground to be covered by visitors. &an ** s`ghtseers were aided by a fleet of lead acid ^ Powered electric vehicles. Clustered around the Paviliion of the Com monwealth of Australia are lead acid bat tery-powered staff cars and (directly behind the light pole) an electric patrol car. Electrics go to the Fair Latest, and bv all accounts one of the most successful of the world fairs to have domi nated the world's entertainment scene dur ing the 20th Century, u as Japan's brilliant EXPO '70. Held in Osaka. EXPO 70 was distinguished bv a number of features, among them its huge si/e and record at tendance from all oxer the world. Innoticed but prominenL in attendance xxas lead. 'I o help insure a quiet, clean, maxinuimeomfort atmosphere at the fair, all vehicles were lead acid battery-powered . . . almost 300 units in all. For that matter, lead xvas almost cer tainly instrumental in getting all visitors, to the fair. Foreign xisitors most likely flew to Japan in jetliners insulated against engine noise with lead loaded vinvl. Any one driving to Osaka did so in an automo bile that starts with a lead acid battery. Visitors traveling from Tokyo to Osaka aboard the 130 mile-per-hour Tokaido Super Express rode under slider bars made of Bishirallov-. a lead infiltrated iron alloy designed specifically to meet the friction problems presented in electrifying the world's fastest surface transit system. The lead acid battery-powered electric vehicles in operation at EXPO '70 included a variety of types to meet a variety of de mands. Reserved for rental service were 120 open-view paviliion vehicles, each of which accommodated 6 passengers. An al ternate transportation system for the sprawling fair grounds was provided bv a fleet of 70 electric taxi cabs. Security patrols policed the fair grounds in 44 elec tric vehicles. 28 of which were equipped with radios. The Nippon Telephone and Telegraph Company operated a fleet of 10 electric service vehicles. The remaining electrics were used for such diverse pur poses as press and publicity coverage, de liveries. lunch wagons and even a tiny fleet to handle the inevitable lost children. From start to finish, the millions of visi tors to Japan's EXPO "70 saw more, in greater comfort, with more pleasure, be cause lead was there. LIA 2 65 99 7 Lead Pads Quiet Vibration in a Modem Hospital Nine rears of painstaking research have gone into the planning of Bos ton s Tufts-New England Medical Center. All needs were considered: the community, hospital itself and patient. Advanced concepts of patient care dictated horizontal rather than tower layouts. This in turn made it necessary in this complex urban lo cation to secure the air rights over Boston's busy Washington Street and underground transit system. As have designers of other buildings con fronted with the same problem of po tentially annoying vibration, the de signers of the Center specified lead asbestos anti-vibration pads. Design for the Center is the work of The Architects Collaborative of Cambridge. Massachusetts, in close association with the medical center's own planning office. The overall ar chitectural concept consists of con tinuous layers of activity covering most of the 13-acre site. A key factor in selecting a horizontal rather than a tower layout for the complex was ex perience showing that the former al lowed for greater flexibility in assign ment of space and encourages infor mal contact among specialties--a spe cial advantage for a teaching hospital. Another design "first" was a rejec tion of the usual layout of patient rooms along a lengthy corridor in favor of a "cluster" arrangement. Nurses' stations, examination rooms, supplies, etc. are centralized with pa tient rooms surrounding them. The nurse can now enter a patient's room directly from this center core as op posed to the usual time-consuming and largely wasteful walk down cor ridors. To isolate the hospital from the in evitable noise and vibration gener ated by heavy traffic on Washington Street and the underground transit system, it was designed to rest on lead asbestos anti-vibration pads simi lar to those used in such important buildings as those in Lincoln Center in New York and the Kennedy Center for the Performing Arts in Washing ton. The pads themselves as designed for this installation, are 6V2" wide, nominally 2" thick. 4' long--bituminous-coated to protect them from the free lime in the uncured cement. The pads consist of a sandwich en closed in 8-lb. (V8"-thicki sheet lead envelope. The filling has a laver of Vo" asbestos roll fire felt. 12-ga. steel stiffening sheet, Vo" felt, 12-ga. steel and a third felt layer. The illustrated drawing of the ac tual pad and steel base construction shows clearly the engineering detail of this particular installation. LIA2660C the one drawn here depend on lead-clad ^ similar to * the ai| important stage separation. . ve^'e. extrusions <r In space... on the ground lead-clad explosive strips play vital role Li\ now eviTvuiie has spent many anxious moments waiting to see if \niericas manned spacecrafts will -unvsslullv separate at the pro'jiamnied stages for the necessary "an situation. Probably the tensest iiinnient of all was the first staae sepa ration of the APOLLO 11 with its precious cargo of three astronauts le aded for the moon. Separation, of course, went right on schedule -- thanks to a linear explosive charge consisting of \-shaped explosivetilled lead extrusion. But flights to the moon are not everyday occurrences. Demolition and fire fighting are. And varia tions of the lead-clad explosive strips used on APOLLO 11 are used daily for these purposes. Demolitions such as that of an existing bridge over the Snake River near Spokane, ashington. was ac complished by three men in three days us ing 25 pounds of Jetcord at a cost of $5,000. Original estimates of the demolition require ment for the bridge called for 1.800 pounds of explosives. Industry has turned to these new devices for special uses of its ow n. One unique clamp like device has been developed to cut cast iron pipe with almost machine tool precision. Other configurations of the lead-clad shaped charges are currently being used for such applications as bolt breaking and joint separation.!" Fire fighting organizations, faced daily w ith the need to make safe forced entries into burning buildings for ventilating purposes, rescue op erations or simple to fight the fire itself, are making particular use of this ''tool", A new device called "Jet Axe", hv its manufacturer. Explosive Tech nology. a subsidiary of Dunoommun. Inc., is as completely safe to oper ate as a power tool. Its ease of use makes it a valuable adjunct in the hands of the professional fireman. Detonation can be made bv means of a 30 foot firing line from an insur able safe distance. The line actuates a spring loaded firing pin which strikes a primer similar to that con tained in a shotgun shell. The firing pin is in the handle of the device and is not attached to the firing line until the unit is prepared for use. Several sizes of the "Jet Axe" are available with lead sheathing filled w ith different explosive coreloads.This availability makes these units suitable for gaining entry or making ventilat ing openings in various combinations of steel, wood and masonrv con structions. They are used successfully on roll-up steel doors, roof structures, concrete block, steel grill work and sheet steel up to 3y-inch thick. In the hands of trained firefight ers or police, these space age leadclad explosive extrusions have be come a valuable asset in saving both life and property. The forced entry device works equally well on steel gratings, steel fire doors, and cor rugated steel roll-up doors. L ] A26fc 01 ( ! r1 1 I 1 i 9 M Red Lead "Takes the Heat" in Canal Zone Kitchen Tlie' protection of ferrous metal struc ture? in the Panama Canal Zone has hi'toricallv been both costlv and diffi cult. The intense ultraviolet radiation, liitrli humidity and salt-laden air pre sent hazards to ferrous metals that not even the he-t of the traditional organic type coatings could combat. Seeking solutions to an old prob lem. the Panama Canal Company in stituted a painting systems exposure program designed to isolate the best system's' for that type of rugged ex posure. After two-and-a-half years, tests -how eonrlusiyely that for deck and other -plash zone service, epoxy red lead, epoxv-enamel, and vinvl red lead epoxy enamel systems are stand out? among the many paint systems tested. Forty buoys or cans, located in carving exposures, were selected to undergo the test. Exposures included atmospheric, splash zone and under water: locations included heavy sea condition?, brackish water, and fresh water. The buovs were inspected at the end of one year, one and one-half years, and two and one-half year?. The first two inspections entailed an examination of the deck and super structure from a -1 to 6 foot distance while standing in a boat. A large sec tion of the bottom of each buoy was then exposed for examination bv tying a rope to the top and using a second boat to pull it over. The final inspection was twofold: once each buoy was loaded on the re moval ship and again two weeks later at the repair site. This final inspec tion was very thorough, and very re vealing. since the two week exterior storage made all corroded or corrod ing areas highly visible. Inspection standards were exacting. They in cluded both an extensive review of particular conditions noted at each site as well as an over-all rating from excellent to poor. On each buoy, three areas were rated separately: bottoms fsubject to underwater ) : decks I >ubject to splashing l ; and superstruc tures I subject to atmospheric and salt spray corrosion). The net result of this elaborate ex periment proved that there were ex isting paint systems w hich oiler a mini mum of two and one-half years pintertion and probably three or more years protection with verv little main tenance repair work required. Higher initial costs of such systems were scrutinized carefully and shown to result in basically lower annual costs as a result of the much longer life of the protectiv e system. The significant results of the test for red lead based paint s\stems were: 1. Bu o y bottoms primed with vinvl red lead, expoxv red lead or phen olic red lead in numerous instance? showed no rust whatsoever. 2. Decks painted with epoxy-red lead epoxy enamel and with vinvl red lead epoxy enamel were rated ex cellent. 3. Superstructures painted with vinvl red lead epoxv enamel, vinvl red lead 'phenolic enamel, or epoxv red lead/epoxy enamel, were all rated excellent. Several epoxy red lead phenolic enamel systems were rated good. LI A? 6fc 02 Odds "n" ends about Lead Photo courtesy of Science Digest THE 60 FOOT LEAD FACIAL There is hardly an American who isn't aware of world-famous Gutzon Borglum's colossal sculpture at Mount Rushmore in South Dakota. The faces of four American Presidents, George \K ashington, Thomas Jefferson, Abra ham Lincoln and Theodore Roosevelt, each 60 feet long, stand out as a genuinely huge testimonial to Ameri can folk heros. Probably no one knows, however, that the National Park Service each spring gives the four faces their an nual "facial." To preserve the monu ment for posterity, cracks in the stone and solid quartz veins are uncovered and sealed with a special mixture of linseed oil, granite dust and white lead--the solution originally specified by the sculptor when he completed the project in 1941. h ig h s peed ben c h TOP SOLDERING Acccurate positioning and precise heating are major characteristics of the INFRA-DEX soldering system manufactured by Spectra Instruments, Inc., Trenton, New Jersey. The INFRA-DEX is a combination infra-red spot heater and a specially designed index table, making it ideal ly suited for high speed production. The system can repeatedly reach tem peratures in excess of 2300F within dwell times of 8-10 seconds. Work parts are loaded into the ap propriate fixtures along with the sol der (preforms or paste solder). The table is indexed either automatically or by a hand or foot switch which positions the work and triggers the infrared heat. Since the heat cycle time and tem perature are controlled by the power supply which functions independently of the index table, molten solder is able to solidify before the table in dexes, thus avoiding cold joints. CERAMIC REMOTE CONTROL DEVICE Recently developed by RCA is a new solid-state ceramic element with elec tric properties that can be adjusted to turn on. turn off, or smoothly vary current flow in any circuit in which it is installed. The de\ ice uses wafers made of ceramic lead zirconate/lead titanate. K( 1A reports that the device has long life and high reliability. Because it i- made of relatively common mate rial-. its fabrication is inexpensive and the associated circuitry can be quite simple. In addition, the device will retain its last setting indefinitely even if power to the circuit is shut off. Potential uses for the control de vice are both numerous and intrigu ing: remote control of lights, kitchen appliances, television, furnace ther mostat. A sophisticated model could even be used to turn on the heat or air-conditioning in an unoccupied va cation cottage by means of a tele phone call from the owner. The new RCA control element is the tiny rec tangular "tab" projecting from the transistor header. CHANGE OF 1 1 1 1 1 1 | ADDRESS OR l NEW READER Use this side of l 1 the coupon if you have recently changed I your address or if 1 you would like to be added to the mailing j fist for LEAD 1 I 1 1 1 ' L** ---------------------------------------------------------- ~ FOR CHANGE OF ADDRESS PLEASE WRITE IN NUMBER FROM TOP OF ADDRESS OR ATTACH OLD LABEL. ^ ADD ME TO YOUR MAILING LIST (pi ase che A one) ^ v/ To Name, Title Company Street ATTACH MAILING LABEL HERE A PLEASE CHECK INTEREST Painting Health & Safety 0 Architectural & Building 0 Design L Radiation Engineers Ceramics ,, Battery Power Miscellaneous (please specify) City, state, zip code L I 4 2 6603 i \ NEW LISTINGS The new lead belt Reprint of article details operations at the new lead belt m Missouri. Booklet de scribes activities at four mines, four con centrators and three smelters. Twelve pages. M-16. ARCHITECTURAL Waterproofing with sheet lead A description of the use of lead as a membrane waterproofing material for lin ing pools, planters, fountains, shower stalls and floors where positive water proofing is required. Architectural details and specifications are included. Eight pages. A-2 Lead applications for building and construction Reprint of article from Progressive Archi tecture reviewing the latest developments m the use of lead in architecture and construction. Twelve pages. A-10 PAINTS Red lead based paint systems Technical booklet lists properties and ap plications for twenty-four red lead paint systems. Specific uses, e.g. fresh water, marine, etc. suggested for a wide variety of formulations. Preparation of surfaces discussed m detaii. Thirty-two pages, charts. F-l PLUMBING Lead plumbing catalog and specifications Specifications and details for the use of lead in plumbing. Waste connections, shower and safe pans and chemical lab oratory drams are covered. Four pages. 0-2 ANODES FOR CATHODIC PROTECTION Cathodic protection for an off shore structure A description of a lead anode protective system for a large offshore mining com plex. Lead alloy anodes were so sus pended from the structure that they could be pulled up during bad weather. Four pages, tables and illustrations. E-2 CHEMICAL CONSTRUCTION & CORROSION PROTECTION Corrosion resistance of lead in chemical applications A chart presentation of the corrosion re sistance of lead and its alloys against 188 common chemicals from 0 to 3G0F. Six pages. H-3 Lead in modern chemical construction Reprint from Encyclopedia of Chemical Process Equipment. Describes installation, proper design application, and testing of lead liftings. Twelve pages, illustrated. H-l Cladding steel with lead by powder rolling A description of the roll compacting pro cess under investigation by the Interna tional Lead Zinc Research Organization. Four pages. H-4 BATTERIES A primer on the lead-acid battery A condensed story of the principles of the lead-acid battery and its chemistry, in cluding some of the fundamentals and definitions of direct-current electric en ergy. Two pages. L-6 Industrial truck cost calculator Three nomographs permit estimation of costs for gas vs. battery powered indus trial trucks in two or three minutes. Twelve pages, charts and tables. L-l CERAMICS Classification of inorganic enamels Description of glass enamels, where they are used, and their composition. Appli cation and firing is also discussed. Six pages. B-3 SOLDERING AND WELDING Soldering alloys Describes numerous alloys used as solders and discusses advantages and drawbacks of many. Flux requirements for soldering most metals, both ferrous and non-ferrous are listed. Four pages, tables and charts. 1-3 This magazine is reproduced from lead type SOUND BARRIERS Practical designs for noise barriers based on lead Seven case histories describing how sheet lead and soft leaded plastic materials make excellent sound barriers. Eight pages, charts, tables and illustrations. J-2 Plenum barriers and sound rated doors with sheet lead A detailed description of the use of sheet lead as a sound attenuation barrier for both wall plenums and sound rated doors. Bulletin includes installation details, at tenuation statistics and suggested speci fications. Four pages. J-7 ANTI-VIBRATION PADS Lead to control sound and vibration A summary of lead's use as a sound bar rier and vibration damping material. Sam ple specifications for an anti-vibration pad installation are given. Curves showing isolation achieved through use of such pads as well as sound attenuation curves for one pound lead are given. Four pages. J-6 Ways to reduce press vibration Two installations of lead asbestos pads to reduce heavy machinery vibrations. Sec tional drawings and loadings are given. Two pages, illustrated. G-l GENERAL The U.S. Lead Industry--1969 An annual review of activity within the in dustry that contains a general summary for the year and a senes of charts and tables giving current statistics on lead production and consumption. M-14 Publications and films This booklet li$t all the material currently available from Lead Industries Associa tion, Inc. Sixteen pages. M-13 Primary lead production areas in the U.S. For schools, libraries. 11 "x 14" map show ing locations in U.S. of most lead smelters and refineries, and lead mines. M-ll NAME____ TITLE _____ COMPANY ADDRESS CITY ___ STATE PLEASE SEND ME THE PUBLICATIONS MARKED BELOW T WRITE IN CODE NO. *-TO REQUEST LITERA MAIL TO: LEAD INDUSTRIE ASSN. INC. 292 MADISON A NEW YORK, N.Y. 1 2IP L I A 2 66 0 A