Scientific American 1941

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Thomas A. Edison's Latest Invention A Storage Battery Designed and Constructed from the Automobile User's Point of View ...

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pressure, in.. The cost of charging current, and hence also the ef· ficiency its recovery the discharge circuit, minor part the total ex· pense operating the vehicle and the low electrical efficiency the battery s offset its extremely light weight­ which 'not only lightens the construction of the vehicle, but increases the propor· tion "paying load" carried the same -and its ruggedness service. -Whereas the lead cell the constitu­ tion (proportions acid and water) con· ductivity and specific gravity all undergo definite changJe during the cycle of charge and discharge, the Edison cell these ql,lalities remain unaltered. The nature the support rna· terials and the method applying the active material the plates enable the cell stand dead short circuits without injury. The Express System Saves Money. Price cents. EMEXT 23. Don't scoff.. makes Blue Prints, Black Prints and Brown Prints.blisbed 18IiO-ALOl<: Civil Engineering and Surveying Instruments DRA WING MATERIALS SIJPPLIES B . in.• 46 "St " Foot aml ar Power Screw Cutting Au��t LathesFOR FINE, ACCURATE WORK Send for Catalogue B. 695 Water Street, Seneca Falls, Y., 50c. Send fOl Catalog I>o. The Bible ofthe aero enthusiast, experi­ menter, builder, aviator and advertiser. Our IIand-Book Patents will sent free on request. ., ROCKFORD, h.iliu(', in. Lowest fuel cost for runs Gasoline, Kerosene- Distillate, Gas Alcohol and has perfect ubrication. DE P'T , /"'K'# TAPES AND RULES ARE THE BEST., 507 Olive Street, St. Sag naw; ich A. Arrane-ed for Steam or Foot Power, Velocipede or Stand-up rrreadle. ALOE CO. Price cents mail., and all newsdeal ers. Write/orcatalogue once, mentioning thispaper. Bill' THELOWESTCOSTENGINE ��{!i�\�;:�leasIest e machine operates, delivering steadier power than any other gasolIne engine, adapting especially for operating farm machinery, with better results and least waste grain. pipe, Ibs. Both free. J\dive Ag'ents wanted. Any mechanic can opprat e them easi Send for eatalol!. with provision for circulation elec. Send for Lathe Catalog. stated that the cell im· proves use, instead deteriorating, and the company guarantees renew 3 One clear oil compound absolutely pure with just enough body oil perfectly the most delicate or sensitive action point. A. Order yonI' motor hom dealer from us. Sold all garages, auto supply dealers, hardware and general stores-10c. A... and states that pays better put over . Yearly subscription, $3. A E-For Sixty Ye:m' the Standard the WOJ'ld for Quality., 308 Park St., Port Washington, Wis. On account the low voltage the cell, a vehicle battery given voltage must contain larger number cells than a lead battery, twenty-fonr lead cells being equivalent forty the nickel-iron cells of same ampere-hour capacity but the low voltage and comparatively high in· ternal resistance are disadvantageo1ls from the purely electrical rather than the vehicle point view. BAR . BIotor for grmding, polishing, fans, sewing mtwhines for Doctors, Dl'ntists, Urn;!' �:)��:Il��l�d;�lfe!�$e;:'����f9���ei�� i �:�· tor and pulle:v 'olll)� $2. WE LL DRILLING MACHINES Over sizes and 8tyles, for rilling either deep or shallow wells any kind soi rock., L'". LA FAYETTE, IND., Manufacturers, 417 West 15th SI. how much it will cost, practical from archi· tecturaI and engineering standpoint ? These and other important questions relating the structure are discussed good, thorough. Strong, sirupie and durable. 361 roadway, New ork, or 625 Street, Washington, C. Accepted the authority. Established 1872. Don't take the side shows and miss the main show i the big tent. Let explain. S ENTI AME RICAN A ttache(J sny water faucet will deyelop lip to according: s i ze pipe and W:ltB!' pre!;,�llre. Try One.. WILLIAMS, BROWN EARLE, Ine. With engines llorse powerR. any battery any time for half the CO'lt bearing of new battery. oxclusively the manufacture 2. YOU WILL MAKE MISTAKE YOU NOT WRITE FOR INFORMATIQN. Catalog free."��;::;;·1J-Neatest, simplest and be,t on Ithe market.L, Write for Free Sample Manufactured by T Y C CO.50, cnsh with or­ d(·r. Y. 918 Chestnut St. STAI-:'RETT CO. The element made very com,;;act.cyc1e motorS. In this "can electricity" the solution s a mere liquid carrier ions-it has, O t speak, moods and tenses its own to catered the battery user. BORBEIN AUTO CO. ]8-B.. water during long periods the life t>f the cell. M Broadway, New York B ranch Office. MO�M. "FREE" Write for Catalogue.ven any inventor furnishing with model sketch and a brief description the device question. 1492-4 in."w York and London. TOOL MAKERS, EXPER I· M ENTAL PAIR WO ETC. ���.00. CO. It will not run out and leave contact points dry. sYz single cylinder. WilliAMS BROS Ithaca. The Sebastian Lathe Co•• 120 Culvert SI. engine made has wide range use. a ONE OIL COMPANY, BROADWAY, New York City. bottles. A Free Opinion the probable patenta­ bility iTlventi�n will readily gi. BABBITT METALS. Ruby St. HOLTZER-CABOT GAS ENGINE JUMP SPARK and M. L O. vehicle manufacturer using the battery reports that charged ex· hausted battery A·4 cellR the rate of 100 amperes for short tin1('. \-Vorl{s day NigJlt-makes prints any lenvth. DETROIT. each ' brought in- Istantly into u,e bal joint .r MUNN COMPANY, Inc. l\Ionev b:lcl;; for allY reason. CO. I TilE J". Please mention the Scientific American when writing- advertisers through wide range, and may far hig]her than would safe with the lead battery. For user:" Blue Print Paper pply Lanting Machines for making blue print paper linen. For sale uno Co• Inc. ''''ashing . Send for catalo. ]6. Patents and 11 Paten secured.-SIX IMPORTA� T formulas., 2109 North Ninth St. Esb. PRICE 11<1. ('at nlog free.00 SI'JIId tor 232 page catalog No. Scale drawings of mac hine, construction details, subscribers' forum.01' for Mechanics find Tradesmen. In charging, the rate can varied 3 One not too heavy-will positively not gum clog, collect dust dirt, harden dry out. THE POWER CONTRACTOR'S FAVORITE ENGINE. CRAY MOTOR CO. Eight sharp cut­ tmg edges. Ours the Oldest agency for securing patents ; it was established over sixty-five years ago. Net price $5, cas witlt orrle-l'. , 4" Walnut Street, Philadelphia, Pa. slow speed, high duty engine. Garages, Repair and General Jobbing Shops find this the ideal lathe for their work. Louis, Mo. 1\[0(., Dept., Chicago, This our 58th year. CIENTTFTC A:\I ERTCAN Sf' PP1. Lowest cost because it delivers greatest available power per horse. swin�.. THE EDISON CONCRETE HOUSE q How constructed.. Manufactured the The Ke)Jstone Safety Starling Handle Co. i\'1ounted on wheels o�· tonl ls. Ball­ bearing, safety starting handles for all makes cars. 1 for complete catalog today••teU8 all about how these high grade lilotors are built tbe largost plant the world devoted. Write once for generous sample bottle and Magneto Bulletin. four cylinder. Starts easier and quicker than any other eng:ine, occupies less space, is ess cum bersome, with less vibration, therefore adapting for either stationary, portable traction use. From 9-in. l3-in. In estimating the true commercial efficiency of road-vehicle transportation, the ton· miles obtained must compared with the total cost operation the vehi- cle, with due allowance for all-around reo liability., 1 Legal Notices IN VENTORS are Invited communicate with Munn o. Sent FREE" A. State your requirement\> and get our adVIse., Cincinnati, Ohio Fon G NSMITHS. connection. SENECA FALLS MFG., Athol. regard to securing valid patent protpction for their in­ v Trade-:llarks and CopyrightM registered. Connections between the cells a battery and with the external cfrcuit are made means heavy niCKel-plated copper·wire connectors, with steel lugs swaged the ends and fitting the taper terminal posts. (I'or sale everywhere. Louis, Mo. Easily lucked or released turning handle. - Every User Blue Prints Should Investigate the New EXPRESS System Blue Printing Automatic, saves half the cost. , concern.,an Supplement 685. 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