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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1).. Established 1872. Send for Lathe Catalog. Send fOl Catalog I>o., L'". Our IIand-Book Patents will sent free on request. Manufactured the The Ke)Jstone Safety Starling Handle Co.. 361 Broadway, New York WHAI ONE MAGNETO OIL ? January 4. regard to securing valid patent protpction for their in­ v Trade-:llarks and CopyrightM registered. Let explain. 3 One contains carbon residue, foreign matter, acid, impurities like all cylinder (mineral) oils.l:ulC>. WE LL DRILLING MACHINES Over sizes and 8tyles, for rilling either deep or shallow wells any kind soi rock.. The nature the support rna· terials and the method applying the active material the plates enable the cell stand dead short circuits without injury., Port Washington, Wis. sYz single cylinder. THE EDISON CONCRETE HOUSE q How constructed.. Louis, Mo. All communications are strictly confidential. oxclusively the manufacture 2. 625 Wash . 3 One not too light properly lubricate and keep lubricated any bearing (ballbearing ordinary bearing). EMEXT 23. Catalog free. Strong, sirupie and durable. 'Publishers '1. DE P'T , /"'K'# TAPES AND RULES ARE THE BEST.L, Write for Free Sample Manufactured by T Y C CO. W. 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. A. swin�. with provision for circulation elec. i\'1ounted on wheels o�· tonl ls. Louis, Mo., Manufacturers, 417 West 15th SI. l3-in. 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. illustrated article published in Scientific meric. Ball­ bearing, safety starting handles for all makes cars. Sag naw; ich A. l\Ionev b:lcl;; for allY reason., 50c.. 1\[0(. 1492-4 in. any battery any time for half the CO'lt bearing of new battery.,an Supplement 685.00 SI'JIId tor 232 page catalog No. YOU WILL MAKE MISTAKE YOU NOT WRITE FOR INFORMATIQN.l1lal'. 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.. Garages, Repair and General Jobbing Shops find this the ideal lathe for their work., Dept. Improved bucket wheel construction. Please mention the Scientific American when writing- advertisers through wide range, and may far hig]her than would safe with the lead battery. State your requirement\> and get our adVIse. ('at nlog free. From 9-in. Esb. M Broadway, New York B ranch Office., Chicago, This our 58th year. Arrane-ed for Steam or Foot Power, Velocipede or Stand-up rrreadle. Order from your newsdealer from . BABBITT METALS. pressure, in. how much it will cost, practical from archi· tecturaI and engineering standpoint ? These and other important questions relating the structure are discussed good, thorough. four cylinder. connection. ���. each ' brought in- Istantly into u,e bal joint . Patents and 11 Paten secured. Y."��;::;;·1J-Neatest, simplest and be,t on Ithe market. 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. \-Vorl{s day NigJlt-makes prints any lenvth., and all newsdeal ers. 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. MO�M. Don't take the side shows and miss the main show i the big tent. water during long periods the life t>f the cell. /). In charging, the rate can varied 3 One not too heavy-will positively not gum clog, collect dust dirt, harden dry out.. Senel )'onr water pres;;nre and silt supply pipe. A. , 4" Walnut Street, Philadelphia, Pa. Price cents mail., Athol. Both free. trolyte because the latter constant, chemically, electrically and physically.00. DETROIT. Write once for generous sample bottle and Magneto Bulletin. Order yonI' motor hom dealer from us."w York and London. "FREE" Write for Catalogue. CRAY MOTOR CO. two cylinder. in. D WAT MOTOR . CIENTTFTC A:\I ERTCAN Sf' PP1. THE SEBASTIAN IS-INCH ENGINE LATHE HIGH GRADE LOW PRICE Automobile Builders. Send for our Special Offer ! ------ ------ --- fiutomobile Running Gears WITH PRESSED STEEL ANGLE IRON FRAMES Also all styles bodies. , concern. 695 Water Street, Seneca Falls, Y.. MIC . J\dive Ag'ents wanted. "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. (I'or sale everywhere. ''''ashing .01' for Mechanics find Tradesmen. Scale drawings of mac hine, construction details, subscribers' forum. Only pel'feet small motor made. It will not run out and leave contact points dry.cyc1e motorS. - Every User Blue Prints Should Investigate the New EXPRESS System Blue Printing Automatic, saves half the cost. pipe, Ibs. 361 roadway, New ork, or 625 Street, Washington, C.-SIX IMPORTA� T formulas. 918 Chestnut St. THE POWER CONTRACTOR'S FAVORITE ENGINE. With engines llorse powerR. BORBEIN AUTO CO. Ours the Oldest agency for securing patents ; it was established over sixty-five years ago. L O. ]8-B. WILLIAMS, BROWN EARLE, Ine. Sold all garages, auto supply dealers, hardware and general stores-10c. TOOL MAKERS, EXPER I· M ENTAL PAIR WO ETC. Lowest cost because it delivers greatest available power per horse. I TilE J".r MUNN COMPANY, Inc. The element made very com,;;act. Try One. LA FAYETTE, IND. ., 308 Park St. Lowest fuel cost for runs Gasoline, Kerosene- Distillate, Gas Alcohol and has perfect ubrication., 1 Legal Notices IN VENTORS are Invited communicate with Munn o. Net price $5, cas witlt orrle-l'. Price cents. CO. A E-For Sixty Ye:m' the Standard the WOJ'ld for Quality.iliu(', in. 25c. The Sebastian Lathe Co•• 120 Culvert SI.• 46 "St " Foot aml ar Power Screw Cutting Au��t LathesFOR FINE, ACCURATE WORK Send for Catalogue B. slow speed, high duty engine. Easily lucked or released turning handle. 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.50, cnsh with or­ d(·r. ALOE CO. S ENTI AME RICAN A ttache(J sny water faucet will deyelop lip to according: s i ze pipe and W:ltB!' pre!;,�llre. WilliAMS BROS Ithaca. Send for catalo. SENECA FALLS MFG. vehicle manufacturer using the battery reports that charged ex· hausted battery A·4 cellR the rate of 100 amperes for short tin1('. For sale uno Co• Inc. makes Blue Prints, Black Prints and Brown Prints. engine made has wide range use. Write/orcatalogue once, mentioning thispaper., 507 Olive Street, St.water pres­ sure; lbs., ROCKFORD, h. pipe. Don't scoff.blisbed 18IiO-ALOl<: Civil Engineering and Surveying Instruments DRA WING MATERIALS SIJPPLIES B . 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.!!!_ and B K TYPES FOR MARINE AUTOMOBILE and STA· TIONARY ENGINES SEND FOR LAT EST BULLETIN 557 THE flOLTZER-CABOT ELECTRIC CO.ven any inventor furnishing with model sketch and a brief description the device question. CO. 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. ]6., LEIB ST. Ruby St. Eight sharp cut­ tmg edges. One boy does the work four men. HOLTZER-CABOT GAS ENGINE JUMP SPARK and M. PRICE 11<1. Any mechanic can opprat e them easi Send for eatalol!. a ONE OIL COMPANY, BROADWAY, New York City. Sent FREE" A. Yearly subscription, $3. 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. -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. GILSON MFG. Accepted the authority., Philadelphia, Pa. 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. and states that pays better put over . THE TEMPLE PUMP CO. The Express System Saves Money. St., 2109 North Ninth St. BAR . STAI-:'RETT CO. bottles. The Bible ofthe aero enthusiast, experi­ menter, builder, aviator and advertiser. 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. For user:" Blue Print Paper pply Lanting Machines for making blue print paper linen