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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ALOE CO. regard to securing valid patent protpction for their in­ v Trade-:llarks and CopyrightM registered. The nature the support rna· terials and the method applying the active material the plates enable the cell stand dead short circuits without injury. 1). Arrane-ed for Steam or Foot Power, Velocipede or Stand-up rrreadle. Price cents.. 918 Chestnut St., Dept. Eight sharp cut­ tmg edges. trolyte because the latter constant, chemically, electrically and physically. \-Vorl{s day NigJlt-makes prints any lenvth. swin�. 'Publishers '1. Send for our Special Offer ! ------ ------ --- fiutomobile Running Gears WITH PRESSED STEEL ANGLE IRON FRAMES Also all styles bodies. With engines llorse powerR. S ENTI AME RICAN A ttache(J sny water faucet will deyelop lip to according: s i ze pipe and W:ltB!' pre!;,�llre., ROCKFORD, h. Sag naw; ich A. BABBITT METALS. Any mechanic can opprat e them easi Send for eatalol!. ''''ashing . It will not run out and leave contact points dry. 25c. CRAY MOTOR CO.ven any inventor furnishing with model sketch and a brief description the device question.L, Write for Free Sample Manufactured by T Y C CO. CO. Esb. D WAT MOTOR . DETROIT.water pres­ sure; lbs. oxclusively the manufacture 2."��;::;;·1J-Neatest, simplest and be,t on Ithe market. Only pel'feet small motor made. THE POWER CONTRACTOR'S FAVORITE ENGINE. two cylinder. 625 Wash ., Athol. L O. 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. SENECA FALLS MFG.iliu(', in. PRICE 11<1.l:ulC>. engine made has wide range use.l1lal'. Established 1872..cyc1e motorS. ]8-B.• 46 "St " Foot aml ar Power Screw Cutting Au��t LathesFOR FINE, ACCURATE WORK Send for Catalogue B. four cylinder. The Sebastian Lathe Co•• 120 Culvert SI. YOU WILL MAKE MISTAKE YOU NOT WRITE FOR INFORMATIQN. 361 Broadway, New York WHAI ONE MAGNETO OIL ? January 4. A. makes Blue Prints, Black Prints and Brown Prints. MIC ., Cincinnati, Ohio Fon G NSMITHS., and all newsdeal ers. 361 roadway, New ork, or 625 Street, Washington, C. Order yonI' motor hom dealer from us. Accepted the authority... 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. pressure, in. Sent FREE" A. Louis, Mo. vehicle manufacturer using the battery reports that charged ex· hausted battery A·4 cellR the rate of 100 amperes for short tin1('. Louis, Mo. l3-in. WilliAMS BROS Ithaca. For sale uno Co• Inc.. 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. One boy does the work four men. Sold all garages, auto supply dealers, hardware and general stores-10c. in. Our IIand-Book Patents will sent free on request. Yearly subscription, $3. 1\[0(. M Broadway, New York B ranch Office. Please mention the Scientific American when writing- advertisers through wide range, and may far hig]her than would safe with the lead battery. Catalog free., Philadelphia, Pa. Ours the Oldest agency for securing patents ; it was established over sixty-five years ago., 507 Olive Street, St. State your requirement\> and get our adVIse. Send fOl Catalog I>o. (I'or sale everywhere. , 4" Walnut Street, Philadelphia, Pa. J\dive Ag'ents wanted. , concern. Patents and 11 Paten secured. Write/orcatalogue once, mentioning thispaper. Order from your newsdealer from . Y. From 9-in. Both free. pipe.50, cnsh with or­ d(·r. sYz single cylinder. 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.00. Scale drawings of mac hine, construction details, subscribers' forum.r MUNN COMPANY, Inc. /). 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. connection. Strong, sirupie and durable. 1 for complete catalog today••teU8 all about how these high grade lilotors are built tbe largost plant the world devoted. l\Ionev b:lcl;; for allY reason. 3 One contains carbon residue, foreign matter, acid, impurities like all cylinder (mineral) oils. 1492-4 in., 2109 North Ninth St. The Bible ofthe aero enthusiast, experi­ menter, builder, aviator and advertiser. THE TEMPLE PUMP CO. -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. A. Don't take the side shows and miss the main show i the big tent. a ONE OIL COMPANY, BROADWAY, New York City. 695 Water Street, Seneca Falls, Y. ('at nlog free. illustrated article published in Scientific meric. ���. A Free Opinion the probable patenta­ bility iTlventi�n will readily gi. Ruby St. W. I TilE J". CIENTTFTC A:\I ERTCAN Sf' PP1. TOOL MAKERS, EXPER I· M ENTAL PAIR WO ETC. WE LL DRILLING MACHINES Over sizes and 8tyles, for rilling either deep or shallow wells any kind soi rock. Send for Lathe Catalog. CO. each ' brought in- Istantly into u,e bal joint . Write once for generous sample bottle and Magneto Bulletin. GILSON MFG. bottles., 1 Legal Notices IN VENTORS are Invited communicate with Munn o. EMEXT 23., Manufacturers, 417 West 15th SI., 308 Park St.-SIX IMPORTA� T formulas. Improved bucket wheel construction. In charging, the rate can varied 3 One not too heavy-will positively not gum clog, collect dust dirt, harden dry out. THE EDISON CONCRETE HOUSE q How constructed. WILLIAMS, BROWN EARLE, Ine. A E-For Sixty Ye:m' the Standard the WOJ'ld for Quality. with provision for circulation elec. Manufactured the The Ke)Jstone Safety Starling Handle Co. pipe, Ibs. how much it will cost, practical from archi· tecturaI and engineering standpoint ? These and other important questions relating the structure are discussed good, thorough. Don't scoff. Equip Your Car With the "Webster" Safely Starting Handle, positive its action, absolutely prevents injury from back-kicks, adopted part 0/regular equipmentfor lco cars. 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. "Boosting charges"-given a vehicle battery when partially dis· charged, carry through a longer _period than its prescribed day's work-may given for hour's run at a rate two three times the normal charging rate and regular charge may be completed hurry starting at a high rate and gradually dpcreasing the rate., LEIB ST. All communications are strictly confidential. i\'1ounted on wheels o�· tonl ls. Garages, Repair and General Jobbing Shops find this the ideal lathe for their work.., Chicago, This our 58th year. Lowest fuel cost for runs Gasoline, Kerosene- Distillate, Gas Alcohol and has perfect ubrication. LA FAYETTE, IND. . BAR . Try One..,an Supplement 685. Net price $5, cas witlt orrle-l'. The element made very com,;;act. Price cents mail.blisbed 18IiO-ALOl<: Civil Engineering and Surveying Instruments DRA WING MATERIALS SIJPPLIES B . slow speed, high duty engine., 50c., L'". Send for catalo.00 SI'JIId tor 232 page catalog No. THE SEBASTIAN IS-INCH ENGINE LATHE HIGH GRADE LOW PRICE Automobile Builders.!!!_ and B K TYPES FOR MARINE AUTOMOBILE and STA· TIONARY ENGINES SEND FOR LAT EST BULLETIN 557 THE flOLTZER-CABOT ELECTRIC CO. 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. HOLTZER-CABOT GAS ENGINE JUMP SPARK and M. Easily lucked or released turning handle. The Express System Saves Money. 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. any battery any time for half the CO'lt bearing of new battery. 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.01' for Mechanics find Tradesmen. St. water during long periods the life t>f the cell. Ball­ bearing, safety starting handles for all makes cars.. STAI-:'RETT CO. MO�M. Senel )'onr water pres;;nre and silt supply pipe. Let explain. DE P'T , /"'K'# TAPES AND RULES ARE THE BEST. 3 One not too light properly lubricate and keep lubricated any bearing (ballbearing ordinary bearing). ]6. For user:" Blue Print Paper pply Lanting Machines for making blue print paper linen. Lowest cost because it delivers greatest available power per horse. and states that pays better put over . - Every User Blue Prints Should Investigate the New EXPRESS System Blue Printing Automatic, saves half the cost. BORBEIN AUTO CO."w York and London. "FREE" Write for Catalogue., Port Washington, Wis