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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.,an Supplement 685. Easily lucked or released turning handle. pipe, Ibs., 50c. For sale uno Co• Inc. engine made has wide range use.blisbed 18IiO-ALOl<: Civil Engineering and Surveying Instruments DRA WING MATERIALS SIJPPLIES B .• 46 "St " Foot aml ar Power Screw Cutting Au��t LathesFOR FINE, ACCURATE WORK Send for Catalogue B. LA FAYETTE, IND. D WAT MOTOR . Patents and 11 Paten secured., 507 Olive Street, St. The Express System Saves Money.. Louis, Mo., and all newsdeal ers. bottles. A E-For Sixty Ye:m' the Standard the WOJ'ld for Quality. , 4" Walnut Street, Philadelphia, Pa. -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. Sag naw; ich A. l3-in. ALOE CO. each ' brought in- Istantly into u,e bal joint . l\Ionev b:lcl;; for allY reason. 625 Wash . 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 Legal Notices IN VENTORS are Invited communicate with Munn o. WE LL DRILLING MACHINES Over sizes and 8tyles, for rilling either deep or shallow wells any kind soi rock. BORBEIN AUTO CO. 1\[0(. STAI-:'RETT CO. All communications are strictly confidential. Arrane-ed for Steam or Foot Power, Velocipede or Stand-up rrreadle. GILSON MFG. swin�. i\'1ounted on wheels o�· tonl ls. illustrated article published in Scientific meric. Ours the Oldest agency for securing patents ; it was established over sixty-five years ago."w York and London. and states that pays better put over . Catalog free. 361 roadway, New ork, or 625 Street, Washington, C. M Broadway, New York B ranch Office. One boy does the work four men. 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. MIC . 361 Broadway, New York WHAI ONE MAGNETO OIL ? January 4. YOU WILL MAKE MISTAKE YOU NOT WRITE FOR INFORMATIQN. Any mechanic can opprat e them easi Send for eatalol!. "FREE" Write for Catalogue.00. /). Accepted the authority., ROCKFORD, h. The Sebastian Lathe Co•• 120 Culvert SI. Price cents mail., Philadelphia, Pa. Let explain. , concern. regard to securing valid patent protpction for their in­ v Trade-:llarks and CopyrightM registered. ('at nlog free. trolyte because the latter constant, chemically, electrically and physically.ven any inventor furnishing with model sketch and a brief description the device question.01' for Mechanics find Tradesmen.iliu(', in. pipe. Manufactured the The Ke)Jstone Safety Starling Handle Co. BAR . MO�M. CO. DETROIT. Eight sharp cut­ tmg edges. Send for Lathe Catalog.., 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..L, Write for Free Sample Manufactured by T Y C CO., Port Washington, Wis. . With engines llorse powerR.. Please mention the Scientific American when writing- advertisers through wide range, and may far hig]her than would safe with the lead battery."��;::;;·1J-Neatest, simplest and be,t on Ithe market. Don't scoff. CRAY MOTOR CO. Garages, Repair and General Jobbing Shops find this the ideal lathe for their work. Sold all garages, auto supply dealers, hardware and general stores-10c. S ENTI AME RICAN A ttache(J sny water faucet will deyelop lip to according: s i ze pipe and W:ltB!' pre!;,�llre. two cylinder., Dept. 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. TOOL MAKERS, EXPER I· M ENTAL PAIR WO ETC. For user:" Blue Print Paper pply Lanting Machines for making blue print paper linen. Price cents. A. connection.!!!_ and B K TYPES FOR MARINE AUTOMOBILE and STA· TIONARY ENGINES SEND FOR LAT EST BULLETIN 557 THE flOLTZER-CABOT ELECTRIC CO. slow speed, high duty engine. Order yonI' motor hom dealer from us. 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. any battery any time for half the CO'lt bearing of new battery., Manufacturers, 417 West 15th SI.-SIX IMPORTA� T formulas. Both free. 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. WILLIAMS, BROWN EARLE, Ine. Y. sYz single cylinder. THE TEMPLE PUMP CO. 1 for complete catalog today••teU8 all about how these high grade lilotors are built tbe largost plant the world devoted. CO. 3 One not too light properly lubricate and keep lubricated any bearing (ballbearing ordinary bearing)., 308 Park St. ���. DE P'T , /"'K'# TAPES AND RULES ARE THE BEST. 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., L'". L O. HOLTZER-CABOT GAS ENGINE JUMP SPARK and M. CIENTTFTC A:\I ERTCAN Sf' PP1. Ball­ bearing, safety starting handles for all makes cars. 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.. Yearly subscription, $3. pressure, in. in. 'Publishers '1. Our IIand-Book Patents will sent free on request. how much it will cost, practical from archi· tecturaI and engineering standpoint ? These and other important questions relating the structure are discussed good, thorough. 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.00 SI'JIId tor 232 page catalog No. Write once for generous sample bottle and Magneto Bulletin., 2109 North Ninth St. Esb. PRICE 11<1. I TilE J"., LEIB ST. Order from your newsdealer from . 1). Send fOl Catalog I>o. makes Blue Prints, Black Prints and Brown Prints. water during long periods the life t>f the cell. 918 Chestnut St. It will not run out and leave contact points dry. 25c. State your requirement\> and get our adVIse. 1492-4 in. Try One. Lowest cost because it delivers greatest available power per horse. Scale drawings of mac hine, construction details, subscribers' forum.. oxclusively the manufacture 2. Sent FREE" A.. W. ''''ashing . 695 Water Street, Seneca Falls, Y. 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. Ruby St. 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.r MUNN COMPANY, Inc. 3 One contains carbon residue, foreign matter, acid, impurities like all cylinder (mineral) oils.l1lal'.cyc1e motorS. Send for catalo. THE POWER CONTRACTOR'S FAVORITE ENGINE. (I'or sale everywhere. Lowest fuel cost for runs Gasoline, Kerosene- Distillate, Gas Alcohol and has perfect ubrication. a ONE OIL COMPANY, BROADWAY, New York City. EMEXT 23. \-Vorl{s day NigJlt-makes prints any lenvth.water pres­ sure; lbs. Send for our Special Offer ! ------ ------ --- fiutomobile Running Gears WITH PRESSED STEEL ANGLE IRON FRAMES Also all styles bodies. WilliAMS BROS Ithaca. four cylinder. Improved bucket wheel construction. Senel )'onr water pres;;nre and silt supply pipe. A. St. - Every User Blue Prints Should Investigate the New EXPRESS System Blue Printing Automatic, saves half the cost. THE SEBASTIAN IS-INCH ENGINE LATHE HIGH GRADE LOW PRICE Automobile Builders. Don't take the side shows and miss the main show i the big tent. THE EDISON CONCRETE HOUSE q How constructed. BABBITT METALS. Established 1872. SENECA FALLS MFG. From 9-in. The Bible ofthe aero enthusiast, experi­ menter, builder, aviator and advertiser.50, cnsh with or­ d(·r. Louis, Mo., Cincinnati, Ohio Fon G NSMITHS., Chicago, This our 58th year. ]8-B. Only pel'feet small motor made. Net price $5, cas witlt orrle-l'. J\dive Ag'ents wanted.l:ulC>. ]6. "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. 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('. The element made very com,;;act. In charging, the rate can varied 3 One not too heavy-will positively not gum clog, collect dust dirt, harden dry out. Strong, sirupie and durable. Write/orcatalogue once, mentioning thispaper. with provision for circulation elec