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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WILLIAMS, BROWN EARLE, Ine. D WAT MOTOR ., LEIB ST., Athol.. The nature the support rna· terials and the method applying the active material the plates enable the cell stand dead short circuits without injury. in. Catalog free. bottles., Philadelphia, Pa. swin�."��;::;;·1J-Neatest, simplest and be,t on Ithe market. CRAY MOTOR CO. From 9-in.r MUNN COMPANY, Inc. each ' brought in- Istantly into u,e bal joint ., 308 Park St.. THE SEBASTIAN IS-INCH ENGINE LATHE HIGH GRADE LOW PRICE Automobile Builders. ]6. WE LL DRILLING MACHINES Over sizes and 8tyles, for rilling either deep or shallow wells any kind soi rock., 2109 North Ninth St. 918 Chestnut St. DE P'T , /"'K'# TAPES AND RULES ARE THE BEST. with provision for circulation elec.-SIX IMPORTA� T formulas. State your requirement\> and get our adVIse. The element made very com,;;act. , concern. Price cents. DETROIT. Lowest cost because it delivers greatest available power per horse., Cincinnati, Ohio Fon G NSMITHS. 'Publishers '1. 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.00. pipe. connection."w York and London. For user:" Blue Print Paper pply Lanting Machines for making blue print paper linen. slow speed, high duty engine.ven any inventor furnishing with model sketch and a brief description the device question. I TilE J"., Dept. Send fOl Catalog I>o. "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. Order from your newsdealer from .. STAI-:'RETT CO. All communications are strictly confidential. HOLTZER-CABOT GAS ENGINE JUMP SPARK and M. ���. 1). Easily lucked or released turning handle. The Sebastian Lathe Co•• 120 Culvert SI. LA FAYETTE, IND. Please mention the Scientific American when writing- advertisers through wide range, and may far hig]her than would safe with the lead battery. 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. J\dive Ag'ents wanted. 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. Sold all garages, auto supply dealers, hardware and general stores-10c. vehicle manufacturer using the battery reports that charged ex· hausted battery A·4 cellR the rate of 100 amperes for short tin1('.cyc1e motorS. Write once for generous sample bottle and Magneto Bulletin. 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. ''''ashing . 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. GILSON MFG. S ENTI AME RICAN A ttache(J sny water faucet will deyelop lip to according: s i ze pipe and W:ltB!' pre!;,�llre., 1 Legal Notices IN VENTORS are Invited communicate with Munn o.01' for Mechanics find Tradesmen., 507 Olive Street, St. oxclusively the manufacture 2. a ONE OIL COMPANY, BROADWAY, New York City. 3 One contains carbon residue, foreign matter, acid, impurities like all cylinder (mineral) oils. i\'1ounted on wheels o�· tonl ls. Patents and 11 Paten secured. YOU WILL MAKE MISTAKE YOU NOT WRITE FOR INFORMATIQN. Eight sharp cut­ tmg edges. The Express System Saves Money. /). Ball­ bearing, safety starting handles for all makes cars. BABBITT METALS. "FREE" Write for Catalogue. CIENTTFTC A:\I ERTCAN Sf' PP1. L O. ('at nlog free. sYz single cylinder. SENECA FALLS MFG. 1492-4 in. regard to securing valid patent protpction for their in­ v Trade-:llarks and CopyrightM registered. two cylinder. and states that pays better put over . MO�M.iliu(', in. Yearly subscription, $3., ROCKFORD, h. Garages, Repair and General Jobbing Shops find this the ideal lathe for their work. any battery any time for half the CO'lt bearing of new battery.blisbed 18IiO-ALOl<: Civil Engineering and Surveying Instruments DRA WING MATERIALS SIJPPLIES B . BORBEIN AUTO CO. It will not run out and leave contact points dry. Y. l\Ionev b:lcl;; for allY reason. Ruby St. In charging, the rate can varied 3 One not too heavy-will positively not gum clog, collect dust dirt, harden dry out. Any mechanic can opprat e them easi Send for eatalol!..l1lal'. 361 roadway, New ork, or 625 Street, Washington, C. Sag naw; ich A. 625 Wash . In this "can electricity" the solution s a mere liquid carrier ions-it has, O t speak, moods and tenses its own to catered the battery user. Try One. Equip Your Car With the "Webster" Safely Starting Handle, positive its action, absolutely prevents injury from back-kicks, adopted part 0/regular equipmentfor lco cars. Price cents mail. Both free.l:ulC>. illustrated article published in Scientific meric., 50c. Accepted the authority. THE POWER CONTRACTOR'S FAVORITE ENGINE. PRICE 11<1., Chicago, This our 58th year. BAR . A E-For Sixty Ye:m' the Standard the WOJ'ld for Quality. Let explain. A. MIC . BIotor for grmding, polishing, fans, sewing mtwhines for Doctors, Dl'ntists, Urn;!' �:)��:Il��l�d;�lfe!�$e;:'����f9���ei�� i �:�· tor and pulle:v 'olll)� $2. CO. EMEXT 23., Port Washington, Wis. ALOE CO. Order yonI' motor hom dealer from us. CO.water pres­ sure; lbs. WilliAMS BROS Ithaca.• 46 "St " Foot aml ar Power Screw Cutting Au��t LathesFOR FINE, ACCURATE WORK Send for Catalogue B. (I'or sale everywhere. Write/orcatalogue once, mentioning thispaper. engine made has wide range use. \-Vorl{s day NigJlt-makes prints any lenvth. 25c. Senel )'onr water pres;;nre and silt supply pipe. M Broadway, New York B ranch Office. Net price $5, cas witlt orrle-l'., L'".. . trolyte because the latter constant, chemically, electrically and physically. Send for our Special Offer ! ------ ------ --- fiutomobile Running Gears WITH PRESSED STEEL ANGLE IRON FRAMES Also all styles bodies. 1\[0(.50, cnsh with or­ d(·r. ]8-B.!!!_ and B K TYPES FOR MARINE AUTOMOBILE and STA· TIONARY ENGINES SEND FOR LAT EST BULLETIN 557 THE flOLTZER-CABOT ELECTRIC CO. water during long periods the life t>f the cell., Manufacturers, 417 West 15th SI. THE EDISON CONCRETE HOUSE q How constructed. Esb., and all newsdeal ers.. makes Blue Prints, Black Prints and Brown Prints. Improved bucket wheel construction. Our IIand-Book Patents will sent free on request. , 4" Walnut Street, Philadelphia, Pa. Don't take the side shows and miss the main show i the big tent.L, Write for Free Sample Manufactured by T Y C CO. St. Louis, Mo. Ours the Oldest agency for securing patents ; it was established over sixty-five years ago. Louis, Mo. Arrane-ed for Steam or Foot Power, Velocipede or Stand-up rrreadle. Send for catalo. One boy does the work four men. -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. Scale drawings of mac hine, construction details, subscribers' forum. A. Established 1872. 3 One not too light properly lubricate and keep lubricated any bearing (ballbearing ordinary bearing). W..00 SI'JIId tor 232 page catalog No. Strong, sirupie and durable. Lowest fuel cost for runs Gasoline, Kerosene- Distillate, Gas Alcohol and has perfect ubrication. Send for Lathe Catalog. pipe, Ibs. TOOL MAKERS, EXPER I· M ENTAL PAIR WO ETC. 695 Water Street, Seneca Falls, Y. - Every User Blue Prints Should Investigate the New EXPRESS System Blue Printing Automatic, saves half the cost. how much it will cost, practical from archi· tecturaI and engineering standpoint ? These and other important questions relating the structure are discussed good, thorough. For sale uno Co• Inc. 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. Don't scoff. 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. Only pel'feet small motor made. 361 Broadway, New York WHAI ONE MAGNETO OIL ? January 4. four cylinder. l3-in.,an Supplement 685. Sent FREE" A.. Manufactured the The Ke)Jstone Safety Starling Handle Co. THE TEMPLE PUMP CO. With engines llorse powerR. 1 for complete catalog today••teU8 all about how these high grade lilotors are built tbe largost plant the world devoted. A Free Opinion the probable patenta­ bility iTlventi�n will readily gi. The Bible ofthe aero enthusiast, experi­ menter, builder, aviator and advertiser