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