Document By8ykdxodNJoEQZDVoKLgpnvo

LEAD INDUSTRIES ASSOCIATION, 292 Madison Avenue, New York, N.Y. 10Q17 ENGINEERING Soldering alloys (Revised) Where to use terne coated steel es for terne. a lead coated stee; 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 Classification of inorganic enamels Two part description of inorganic gias enamels and application techniques Th tables, si* pages Follow the safety line with chrome yellow pages. Lead paint systems for bridges Red lead based pamt systems Porcelain enamels: TERNE-COATED STEEL DIAPHRAGMS Assure Long Meter Life Whether of the natural or manufac tured type, gas is one of our most useful and valuable resources. It is employed almost universally in homes, offices, public buildings and manu facturing plants throughout the coun try. The gas meter was introduced when gas came into use for illumina tion in the city of London in 1810. These first meters were of the wet type and were very accurate but the fact that they contained water as a sealant caused many problems. To overcome these inherent faults, the drv or diaphragm type of meter was developed. It was the forerunner of the displacement type in use todav. Perhaps the most readily recog nized type of gas meter is that used in residential service. It is the famil iar box-shaped, four chamber unit known in the trade as the "tin meter." It is made from tin plate carefully sealed with lead alloy solder. This type of meter, however, is not suited for heavy duty industrial use because of its limited working pressure and easily damaged housing. Industrial meters like most modern, positive displacement gas meters, are similar in operation to the working of a double acting steam pump. The pump has four cvlinders. two for steam, two for the fluid being moved. A series of valves, controlled hv the movement of the opposed pump pis tons. change the direction of the steam from one cylinder to the other and at the same time perform a like function on the fluid cylinders. In the case of the pump, the steam is vented to atmosphere while the fluid is carried to its destination. Most large capacity, high pressure meter? for heavv duty service are similar in design to the Rockwell Manufac turing Company 3000 meter made in their De Bois. Pa. plant. Here the cylinders are replaced by chambers, the pistons by diaphragms with valving similar to that in a steam pump. Two chambers are cast integrally with the meter body and the two dia phragms placed within the body are completely sealed from each other and have a 00 phase relationship. Each reaches its potential everv 90c of rotation creating a smooth running uninterrupted gas flow meter. The breathing motion of the diaphragms, moving back and forth, is trans formed into rotary motion which turns the index dials of the meter. This is also used to control the valves. The diaphragms have a double duty to perform, first to propel the meter index and second to displace the proper amount of gas. The valves control the time at which the gas is admitted and also the amount passed through the unit. Because these meters must meet j kinds of environmental conditions u j measuring everything from sewage propane, natural, manufactured and other types of gas. they must be built to withstand the most severe service The units must be trouble free t0 provide for long, uninterrupted ser vice. On Rockwell's 3000 meter thf diaphragm bellows are of rubber and the diaphragm pans are made of terne. a lead-alloy coated steel that provides for maximum servicp UfP Terne was selected for this applic*. tion because it is sufficiently rigid, is easily worked and is highly corrosion resistant. The complete diaphragm includes an outer and inner pan, a bellows and clamps to hold the assembly together. The outer terne pan is stationary and has an inlet-outlet port as wiell as & drain to permit accumulated liquids, that have condensed inside, to be drawn off. The inner terne pan is movable and the linkage that drives the valve movement and the index dials are connected to it. Two of these completed diaphragm units mount on the valve plate which in turn fits on top of the valve body. The design, with inlet and outlet flanges on the body permit? the meter to be proved, inspected or repaired without remov ing it from the line. Back Case is emptying, Back Diaphragm is filli ng, Front Diaphragm is empty and the Front Case has just filled. Back Case is now empty. Sack Dia phragm is full, Front Diaphragm is filling, and the Front Case is empty- Sack Case filling. Back Dia phragm is ptymg. Front Dia- phragm ha filled, and the Front Case is emptied. Back Case is now completely filled. Back Diaphragm is empty. Front Diaphragm is emptying and Back Diaphragm is filling. OUTLET INLET CUTLET NLT _ ,1^OUTLET -OJ; ---- t, - - 2 \l ir .1 2 2 LIA26533 STTU OOUBM w imuc ... TAW MI JOBETV LAO ASBESTOS HD TO* or SLAB LEAD ASBESTOS HD ... GAUGE 9TT SsoTEctl.o*ATaTAeCrHr STEEl BOX TO BOTTOM WATT or bo x n of the the other rm a like inders. In steam is the fluid ion. Most ire meters re similar Manufacr made in Herr the chambers, ms with a steam tie gai is passed l ead Lowers the Curtain on Vibration and Noise at CAABSAOPBVPAELSESAPMVE MSMCEI D4UTTTEBLCTXMCSS LEAD-ASBESTOS MC WSnITrHFtNSTMEEGL CXM Because these meters must meet dT- kinds of environmental condition* measuring everything from sewan^s propane, natural, manufactured Bwjfe other types of gas. they must be huiW* \ to withstand the most severe servi^lo The units must be trouble free provide for long, uninterrupted * vice On Rockwell's 3000 meter - diaphragm bellows are of rubber anfl - the diaphragm pans are made o|. terne. a lead-alloy coated steel thaj^ provides for maximum service mm Terne was selected for this applicable tion because it is sufficiently rigid, if*7? easily worked and is highly corrosion!',; resistant. Tlie complete diaphragm include*^ an outer and inner pan. a bellows and clamps to hold the assembly together. The outer terne pan is stationary and has an inlet-outlet port as well as *T. drain to permit accumulated liquids, that have condensed inside, to be drawn off. The inner terne pan U movable and the linkage that drives the valve movement and the indei dials are connected to it. Two of these completed diaphragm units mount on the valve plate which in turn fits on top of the valve bodv. The design, with inlet and outlet flanges or the body permits the meter to be proved, inspected or repaired without remov ing it from the line. Kennedy Center There's hardly a concert hall in the p jv where one might find Brahms. Bi^e!. and Eugene O'Neill all being placed in the same room--back to back. But in 1969 this may conceiv ably occur at the new John F. Ken nedy Center for the Performing Arts in W ashington. D. C. The 6(X~I ft. x 360 ft. Kennedy Cen ter building is a steel frame structure that incorporates all three functions of concert hall, opera house and theatre, Each of the three was de sign ed as an independent "box" con tained within an o\erall shell. Con ceived by architect Edward Durell Stone of New ^ ork City, the Center also houses a smaller. 510 seat theatre, a multipurpose roof-terrace pa\ilion, restaurant, coffee house and exhibit areas. Parking for 1.600 cars is provided on three levels in the building's substructure. The building itself is located on a seventeen acre site on the East bank of the Potomac River which overlooks Theodore Roosevelt Island. To achieve acoustical separation for each of the three halls, architect Stone located two long galleries be tween them. In addition to using heavy double masnnrv walls and roof, each building rests on lead anti vibration pads that completely isolate each structure from vibration gener ated in nearhv buildings, the Rock Creek and Potomac Parkwav that passes beneath the building's canti levered terrace, and from ncarbv Washington National Airport. The pads were of standard 1-in. thick construction. They consist of an envelope of 8-!b. U^-in. thick) lead enclosing two layers of ^k-in. thick asbestos roll fire felt, with a 12-ga. steel stiffening sheet in the center to facilitate handling. They wore placed in elevated positions on the columns for engineering reasons involving ac cessibility and a desire to keep them close to the areas they were intended to isolate. A total of 82 pads were installed, about evenly divided be tween the three halls. Thev totaled about 1.000 sq. ft. in area and util ized approximately 10 tons of lead. The box into which the individual pads were placed l see illustration!, is unusual although not unique. Thpurpose of the box was to avoid `.i necessity for through-bolts, which, no matter how carefully detailed, run the risk of short circuiting the pads. Crediti: Architect, Edword Durell Stone Struct yrel Engineer*, Severud-Perrone-Sturm-Conlin-Rondel Generol Controctor. John McShoin, !n< Lead Work, John F. Abernethy Powered by lead-acid batteries, the Jeffery Ramcar no longer needs route restricting trailing cables Batteries Cut the Umbilical Cord In the mining industry, because of the heaw power demands for tram- standard, time proved traction mo tors and controls. The new hatterie- -leering svsten, is accomplished W7 mean- of a universal type mine big loud*, the job has long been assigned to cable ree]-t\pe ebuttle cars. Power to drive these unit? pt-rmit the car to operate fui a full shift, under m<M operating condi tion?. before a hatterv chance is re < nupling that join? th. trartor t*. the load carrying trailer permanent unit. ^ ; comes from a large insulated trailing quired. ith this higher nominal < hie of tiie .-utstandins feature cable that winds o- unwind* on a voltage battery, the voltage drop-off trie .a.' i? its method nf loading*^ reel as the tram moves awav from is ?low and gradual ?o that the bat unloading--irotn which it derivn the power source. This trailing cable ten works at practically full efficiency name, do start an unloading eygV severelv limits the total length of during the entire discharge eyrie the eumhination bumper'tailgate u travel and the ability of the vehicle without the vehicle slowing down for )11w rred hydraulicallv. Then a be#v> to move around obstructions. Tech the last half of the shift. The ear dutv hvdraulh ram pushes an inner nological advances during the last 15 takes advantage of high strength teles- oping portion of the hopper "half years in the design of lead-acid bat materials and modern design appli w a\ d"W ri its length. When this Wop*, teries with Td''.' more capacity into cations to increase payload and range the rear panel of the movable "raa*' the same space, have made it prac of the unit. hopper continue? to push until 0* tical to produce a mine haul vehicle The unique design of the Ramcar load is completely discharged. It b which eliminates the range limiting * *trailing cable and frees the units from Hi |Climited haulage routes. makes a battery change possible with a minimum of manual labor and im external machinery. The battery liter- operated in reverse for the loading cycle. The operator sits sideways in the Jeffrey Mining Machinery Com allv lifts itself out of the vehicle onto o- kpit so that he - an see equally vtdl pany of Columbus. Ohio, with its new the charging rack and conversely lift? in either direction without having to RAMCAR has introduced an en a charged replacement batten back turn around while driv ing or during tirely different concept in a haulage vehicle. It has resulted in the design and use of a vehicle which has an easily changeable lead-acid batten and handles the roughest of heavvdutv coal or ore haulage assignments. The Ramcar is available in three basic models with load capacities into the ear. Built for minimum maintenance, the Ramcar has no me chanical differentials, no trailing cable, no complex wheel units or steering arrangements and no < on vevor chain drive. Drive is hv indi vidual motor on each of the two drive wheel* through peed reducers and roller chains. The vehicle j> articu the load unload cv-le. Steering b controlled bv a simple hand lever to b- pushed in the direction that the rar is to travel. Throttle and brakn arc fnot operated. Economic justification for the u*e uf these unit- 'which initially row sliuhtb more than cable reel type ranging up to a maximum of 30 tons. lated and i? steered with two hvdrnu- shuttle cars1 is in the fad that their U ith a new battery design, rated at lir jacks activated hv an electric mo rfheienev increases the annua! ton a nominal 250 \o!ts. the vehicle uses tor pump hvdraulic nstem. Thi- nage per unit hauled up to dS'-r . Activated by a hydraulic ram. the car can be completely unloaded m a matte- o` second! Battery operated hydraulic rams omv,ot hw easy steering of the ameuiatec! vefficf* E t\ LIA26535 As illustrated in the sectional view, 10-lb. sheet lead is used to protect the sides and 20-lb. sheet lead the base of this Peabody designed scrubber for sulphuric acid production. 1 Gas Scrubbers Stop Corrosion With Lead ii ' 0 One of the largest single uses for lead boilers and following heat recovery, with sheet lead. Over the lead lining, calls for it to be continuously im the gas is sent to an SO- purification acid brick is installed to protect the s mersed in a sulphuric acid solution. system. Since the gas contains solid, lead against the high temperature of 0 That application is the lead-acid bat liquid and gaseous impurities which the incoming gas. The scrubber inlet p tery which provides reliable electric must be removed efficiently, cyclone and main tower section, up to a 5 energy for the starting, lighting, and dust collectors, electrostatic precipita height of approximately 15 to 25 ignition of nearly 20U million cars tors and Peabody scrubbers are used feet, require this multi-wall construc p and trucks throughout the world. in various combinations. .Normally, tion of carbon steel, lead and brick as t Lead's ability to resist corrosive at the Peabody scrubber is the final dust a suitable confinement for the hot tack makes it the logical choice also collector. It removes the residual fine corrosive gas. A lining of 10-lb. lead for use in sulphuric acid production solids by direct contact scrubbing on the sides and 20-lb. lead in the equipment. with water. At the same time the gas base provides reliable service and is One firm that utilizes much lead in is washed, it is also cooled bv the used throughout the sulphuric acid this field is Peabody Engineering water. This helps to maintain a low industry where wet-process purifica Corporation who design and manu water vapor content in the exit gases. tion is required. facture S02 gas scrubbers. A typical Cleaned gas then enters the acid Normally, the sheet lead is sup application for a Peabody scrubber plant, is dried, and the S02 is oxi ported by lead covered steel straps is in the nonferrous metals industry. dized to S03. From the converter, the bolted to the wail. However, in many Here, sulphuric acid is produced S03 is absorbed by 98% H-SCL in cases strapping is not necessary as the from S02 gas generated by roasting the absorption tower. brick lining holds the acid resistant sulphur bearing ores at high tempera In handling the hot SO? gas, the lead sheathing in place. On special ture. In the roasting operation, along lower humidification section of the applications, the gas cooling and con with a considerable evolution of heat Peabody scrubber must resist hot gas. tacting trays as well as the other in and the formation of SO-, a high and, intermittently, high concentra ternal fixtures in the upper portion of percentage of the calcine is entrained tions of sulphuric and sulfurous the scrubber can be made of homog in the gas stream leaving the roaster. acids. This lower humidifier section enous lead bonded steel. This hot gas then enters waste heat is fabricated of carbon steel, lined LIA26536 5 Looking west toward the Delaware shore, the twin bridges stand majestically against the n,, Red Lead Primer Gets... DOUBLE The driver who is Washington bound on the New Jersey Turnpike for the first time in several years need not think he is getting double vision as he approaches the town of Deepwater. N. J. He is realiv seeing two identical bridges as he speeds toward the Dela ware River. The second span, con necting Deepwater with New Castle, Delaware, was built to ease heavy traffic congestion. It now makes pos sible four lanes of traffic in each di rection on this heavily traveled route. The twin bridge was started in 196-1. It was dedicated in early Sep tember. 1968, with ceremonies at tended bv Hubert H. Humphrey, the Vice President of the United States. Charles L. Terry. Jr., Governor of Delaware, and Richard J. Hughes. Governor of New Jersey. The new span, designed as a joint venture by E. Lionel Pavlo and How ard. Needles, Tammen & Bergendoff, both of New York City, runs parallel to the older one just 250 feet to the North. The contract for the foundations and sub structures was handled as a joint venture by J. Rich Steer. Inc., Perini Corp. and J. H. Pomeroy & Co .. Inc. Fabrication and erection of the steel work for the West approach super structure and the suspension bridge superstructure was handled bv the Bethlehem Steel Corporation, the Fast superstructure bv Harris Struc tural Steel Company. In developing the specifications for the new span, the consulting engi- Driving piling to form the cofferdams in which the massive cable anchorages were constructed. Amid a cluster of barge mounted cranes, the two 418-foot high towers start to take form. L IA26537 s the first line of protection against corrosion for the old as well as the new structure. OSURE ON THE DELAWARE leers and the office of Mr. W illiam J. ililler, Jr.. Director of the Delaware diver & Bay Authority, specified lead is the first line of defense against the nroads of corrosion. After spinning was completed, the .impacted cable was given a coat of red lead in oil paste in advance if w rapping. The paste contained 100 inunds of red lead powder to 8JA nounds of linseed oil. The joints between the wrapping ind the cable bands were made water tight by calking with lead wool. After the cable wrappings were completed, the openings between the halves of the cable bands were lightly calked with oakum saturated with red lead and then covered with a layer of lead wool, thoroughly compacted. All of the superstructure was pro tected with a shop coat of proven red lead primer. A field applied coat con taining red lead pigment was next. Two more coats of paint, one gray and the final grav-green were then applied. The system is expected to supply the same good service as has been experienced on the new bridge's twin. With its main suspension span of 2.150 feet, the new bridge will also tie its twin as the 14th longest sus pension span in the world. Clearance on both bridges is 175 feet above mean high water. Erection of the sky-high foot walks take place as a prelude to the spinning of the main cables. It takes 484 wires 0.196" in diameter to form a strand and 19 strands for each of the main cables that support the span. New Tool for Metalworking Designers... SOLDER AND FLUX MIXTURES ! Typical paste solder applicator machine. Needle on reservoir varies in size and shao to suit solder placement needs. p# Manv firms are discovering that sol der powder blended with fluxes and neutral suspending agents (called "paste solders"') can improve quality, lower costs and boost production of assemblies. The reasons? Fluxing and solder placement are accomplished in one step: precise amounts of solder metal can be metered out hv new automated dispensers: and nearly anv allov or flux can be incorporated into the paste. As with nearlv anv soldering op eration. the heating method used with paste solders is more dependent upon joint configuration and properties of the materials to be joined than upon the solder allov or flux. All forms of heating have been successfully used with paste solders, It is worth noting, however, that those methods which pro\ ide the most uniform increase in temperature to the melting point of the solder are most desired. Xalurallv. in automated joining op erations a method that brings heat to the joint quickly is important. In duction and focused infrared heat are two rapid and uniform heating meth ods. In addition to being clean, noncontact methods, both are reliable and swift, depending on the size of the solder joint and conductivitv of the materials to be joined. Other good heating methods include flame, resistance, ovens, radiant heat. and. of course, the soldering iron. In addition to the above inherent advantages, other production advan tages can be realized. Paste solders are highlv advantageous in soldering vertical surfaces. Fixturing is simpli fied in these cases because the fix ture does not have to locate the part in an unnatural position to hold al loy on the joint area. In some in stances. this enables the parts to relain their self-locating nature. Preposilioning of the paste solder de posit on the assemblv prior to heat ing is also possible w ith this technique To further the increased produc- tivitv available with paste solders automatic paste applicating equip, ment has been developed. Bv auto matically dispensing paste deposits directly to the joint area, a high de gree of speed and mechanization is now available that was previously unrealized. The applicator units generally con sist of metering tvpe guns with suit able control systems and paste stor age tanks. The applicator guns are pneumatically operated, but mechani cally controlled. Positive cut-off and positive displacement principles are followed to insure that consistent paste alloy deposits result. Auto matic paste applicators can be ad justed to apply deposits in dot or stripe form with accurate repeatabil ity automatically or can be adjusted to give an operator complete control of the placement and the deposit size. Automotive applications for mechanized paste solder operations are many. Here oil filler tube on a power steering assembly receives paste stripe prior to soldering with a gas flame. Here automatic machine places paste solder stripe around an oil filter tube assembly--and subsequently fixtures and solders the unit--all in one machine. LIA26539 9 The 12" transistorized TV set at the left incorporates the newly-developed, winding-free piezoelectric flyback transformer while the model at the right has the conventional type. New TV Transformer Design The piezoelectric transformer center, is >/5 the size and V, the weight of the conventional unit, left. If you are one of those traditionalists who visualize a transformer as being made up of primary and secondary windings on an air or iron core, you will soon have to adjust to "space age" thinking. Now transformers are going "solid state.' For example, wire windings are no longer necessary in a transformer that supplies high volt age for television picture tubes. In their place is a newly developed high voltage transformer for transis tor and tube applications. It utilizes leaded piezoelectric transducers. The device steps up voltage from 200V to 10.000V. This has eliminated many thou sands of turns of copper wire and the special insulation that enabled it to resist the heat and the high voltages involved. In the new transformer, the piezo electric element is a ternary solid solution of lead magnesium niobate, titanate and zirconate with various additives . . . PbTiO .PbZrO.PbtMg1/3 Nb? ,)03. About 70% of the material by weight is PbO. This transducer converts electrical energy to mechanical vibration and back to electrical energy of a higher voltage. When 200 volts AC is applied to the driving section of the trans former. mechanical vibrations are created. When it strikes the driven section mechanicallv. it creates a volt age of between 10.000 to 12.000 volts at 150uA. The new transformer, designed by Wireless Research Laboratories, is mounted in a plug-in, 9-pin module that includes the high voltage rectifier tube. It is onlv the size and 1 \ the weight of conventional transform ers which is extremely helpful in view of the present trend to miniaturiza tion. Because there is no possibility of insulation failure and subsequent shorting of windings, the new trans former is expected to nave a long ser vice life. In addition to its use in television receivers, the unit has ap plication to oscilloscopes and devices using Gieger and Muller tubes. Wire less Research Labs points out that with more than 11 million black-and- white and color television sets sold in this country in 1967 and with an equal number likely for 1968, a large potential for the device exists. L I A 26540 LEAD CABLE Contributes Reliability to... Ultra Modern Mass Transit The 75-mife long BART System uses reliable lead sheathed cable for critical 12-mile por tion of electrical system that required direct underground burial. I nlike the New York City subway system that was built by interconnect ing three totally unrelated lines, the designers of BART started from scratch. BART is short for Bay Area Rapid Transit District . . . San Fran cisco's answer to the increasing prob lem of traffic congestion. A three-county subway, surface and elevated rapid transit system, it will rover some 75 miles and boast many innovations. And, being all new. the engineers and designers took advan tage of lechnologies and materials that were non-existent when the New York subways were built. BART has spared nothing to assure absolute safety and reliability throughout the system. In line with these aims, as in volving the electrical system, consult ing engineers, working with BART's own staff of technical engineering ex perts. recommended highly reliable lead sheathed cable for that portion of the line requiring direct burial. For absolute rertainty thev felt that there was no better choice. As an outstanding example of some of the departures from the design lim iting parameters of older svstems. BART will employ a wide gage track that measures 5'6" as compared to the standard gage of 4' fi3/;", giving mu ch more room within the ears as well as assuring greater car stability. This will permit the use of light weight. 70' cars that w ill seat 72 pas sengers with greater riding stabilityarid comfort. Plushly appointed, the cars will have wall-to-wall carpeting, wide aisles, recessed directional light ing, air conditioning and large tinted windows. Welded rails, installed in 1.400' lengths will provide a smooth, almost noiseless ride. The first portion of the system to become operational will be the 20mile section between the northern portion of Oakland and Hayward. This segment of the system is sched uled to open late in 1970. The trans hay link to San Francisco will be added sometime in 1970. The entire system is being built at an estimated cost of SI.2 billion. It will connect communities in Alameda. Contra Costa and San Francisco Counties and will require about 100 contract ing firms and about 7 years to com plete. All-in-all. construction will de mand a force of 8,000 workers. The system's 1-mile, twin, trans hay tunnel will be the longest under water tube in the world. The subwav and tunnel portions of the road will account for 19 miles of the total 75 mile distance with the balance made up of surface and elevated trackage. A total of 31 passenger stations are planned. These will be placed ap proximately 2 miles apart to sene the riding public. When in full opera tion. BART is expected to carry about 200.000 passengers a day. LIA 2654 1 in t er es t in g o dds and ends abo ut LEAD BATTERY OPERATED b e h e mo t h This lead-acid battery powered lift truck, according to the manufacturer Elwell-Parker Electric Company, is believed to be the largest ever built. It can handle up to 80.000-Ib coils .f st:teel with ease. The truck features a split and tilting ram that can handle one and two coils or a skid loaded with steel. The split rams ran be operated together or separate ly. SCR pulse controls provide for maximum utilization of battery cur rent. For all of its huge size, the unit has a remarkably short turning radius for excellent maneuverability. A "con trol bridge" allows for standup op eration from either side of the truck, high visibility and ease of handling. X-RAY TESTER FROM ELECTRON BEAM WELDER A simple method for temporarily transforming a lead shielded electron beam welder into an X-ray testing device was developed by manufac turing engineers at a large aircraft plant recently. An electron beam in regular position is directed at a tungsten block that is mounted at a 45 angle. This target emits X-rays which are projected through the weld specimen to the film. By using Polaroid Type 55 P/X. positive-nega tive film, positive prints, obtained in 10 seconds, can be viewed immedi ately in a standard illuminator. This technique allows for immediate in spection of the weld. fl LEAD SPRINGS ANYONE? If you envision a lead spring as some thing heavy and without resiliency, you couldn't be further from the truth. The helix spring, shown here, of dispersion strengthened lead, dra matizes the material's higher levels of tensile and creep strength. It was successful in supporting tw ice the load of a spring made of pure lead show ing remarkable recovery powers. Another spring, at left, provides air suspension. It utilizes ceramic per manent magnets. The doughnut shaped magnets were placed on a plastic rod and stacked with like poles facing so that they repel each other to create a floating spring. Lead is used to improve the ceramic's mag netic properties. BATTERY POWERED CAR LIFT Here is a way to take the hard work out of changing, a tire. It is done with a jack, powered by the car's lead-acid battery. It lifts the ve hicle at the touch of a button. The new jack will replace anv conven tional jack now in everyday use. i 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 CHANGE OF ADDRESS Fmm Name, Title Company Street City, state, zip code Ta Name, Title Company Street City, state, zip code Q ADD ME TO YOUR MAILING LIST (please check one) PLEASE CHECK INTEREST ,, . .. .. Health & Safety Architectural & Building Design & Radiation Engineers G Ceramics G Chemical Engrs. Q Battery Power G Miscell. (please specify) i LIA265A2 11 NEW LISTINGS An Exposed Lead Membrane for Reflecting Pools A reprint of an article describing LIA's new research developed expansion joint for use with exposed lead membranes in reflecting pools. All lead building Two reprints describing this unique use of lead for the roof and sidewalls. Cool soldering developments A six-page reprint describing eight new soldering techniques. Better batteries spark new interest in electric trucks An inside view on the latest developments in lead-acid batteries. GENERAL The lead matrix A 26-min color film describing the diverse uses for lead. For group showings. Design engineering data New developments in organolead chemistry Latest trends in using organoleads for variety of purposes. Eight page reprint gives data and reactions. BATTERIES Picture book of power batteries Industrial truck costs in a jiffy Check lift truck truths CONSTRUCTION Working with Lead -- and Adhesives Twelve-page manual tells how to do it. what adhesive to use. Covers acoustical, X-ray, laboratory, outdoor waterproofing, and special projects. Architectural & Construction Bulletin No. 1 Eight-page brochure on Acoustical Plenum Barriers and how to install them. Practical Designs for Noise Barriers An eight-page reprint which covers seven actual cases. Lead to control sound and vibration Isolation of buildings from vibration Two reprints discuss a number of case histories of the use of lead-asbestos pads to control ground-borne vibration. Ways to reduce press vibration 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 in cast iron plumbing pipe Waterproofing with sheet lead Lead work for modern plumbing $2 per copy; $1.50 for 10 or more. ENGINEERING Soldering alloys (Revised) Where to use terne coated steel Four page reprint summarizes new Industrial 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 Classification of inorganic enamels Two part description of inorganic glass enamels and application techniques. Three tables, six pages. Follow the safety line with chrome yellow Formulations and suggested applications for chrome yellow safety paints. Eight pages. Lead paint systems for bridges Red lead based paint systems Porcelain enamels: For aluminum Low temperature steel Glazes for brick This magazine is reproduced from lead type V 1 I i % * j \ MAIL TO: LEAD INDUSTRIES ASSN., INC., 292 MADISON AVE., NEW YORK, N.Y. 10017 Name, Title Company Street CityStateZip Please send L IA 26 5A3 <-TO REQUEST LITERATURE a