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