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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50, cnsh with or­ d(·r. Send fOl Catalog I>o., 308 Park St.. BAR .• 46 "St " Foot aml ar Power Screw Cutting Au��t LathesFOR FINE, ACCURATE WORK Send for Catalogue B. Write/orcatalogue once, mentioning thispaper. THE EDISON CONCRETE HOUSE q How constructed. Only pel'feet small motor made. Lowest cost because it delivers greatest available power per horse. 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. four cylinder. Both free. makes Blue Prints, Black Prints and Brown Prints. Price cents. regard to securing valid patent protpction for their in­ v Trade-:llarks and CopyrightM registered. 1 for complete catalog today••teU8 all about how these high grade lilotors are built tbe largost plant the world devoted. Y. Please mention the Scientific American when writing- advertisers through wide range, and may far hig]her than would safe with the lead battery. a ONE OIL COMPANY, BROADWAY, New York City. 695 Water Street, Seneca Falls, Y. and states that pays better put over . M Broadway, New York B ranch Office. Patents and 11 Paten secured. For sale uno Co• Inc. THE SEBASTIAN IS-INCH ENGINE LATHE HIGH GRADE LOW PRICE Automobile Builders. bottles. 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. Scale drawings of mac hine, construction details, subscribers' forum. BORBEIN AUTO CO. Senel )'onr water pres;;nre and silt supply pipe. In charging, the rate can varied 3 One not too heavy-will positively not gum clog, collect dust dirt, harden dry out. Louis, Mo. - Every User Blue Prints Should Investigate the New EXPRESS System Blue Printing Automatic, saves half the cost. pipe. WE LL DRILLING MACHINES Over sizes and 8tyles, for rilling either deep or shallow wells any kind soi rock. 25c. DETROIT. pressure, in. 3 One contains carbon residue, foreign matter, acid, impurities like all cylinder (mineral) oils. connection. 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. A. ]8-B. Esb. Garages, Repair and General Jobbing Shops find this the ideal lathe for their work. The Sebastian Lathe Co•• 120 Culvert SI. Order from your newsdealer from . "FREE" Write for Catalogue. 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. slow speed, high duty engine. l\Ionev b:lcl;; for allY reason. pipe, Ibs.,an Supplement 685. Ball­ bearing, safety starting handles for all makes cars. PRICE 11<1., Chicago, This our 58th year.-SIX IMPORTA� T formulas. each ' brought in- Istantly into u,e bal joint . 1\[0(. Lowest fuel cost for runs Gasoline, Kerosene- Distillate, Gas Alcohol and has perfect ubrication.blisbed 18IiO-ALOl<: Civil Engineering and Surveying Instruments DRA WING MATERIALS SIJPPLIES B . Price cents mail. CRAY MOTOR CO., Cincinnati, Ohio Fon G NSMITHS. sYz single cylinder. The element made very com,;;act. two cylinder. Net price $5, cas witlt orrle-l'. W. -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. oxclusively the manufacture 2., 507 Olive Street, St. CO. /). in. WILLIAMS, BROWN EARLE, Ine.!!!_ and B K TYPES FOR MARINE AUTOMOBILE and STA· TIONARY ENGINES SEND FOR LAT EST BULLETIN 557 THE flOLTZER-CABOT ELECTRIC CO. St. 1492-4 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. vehicle manufacturer using the battery reports that charged ex· hausted battery A·4 cellR the rate of 100 amperes for short tin1('. Order yonI' motor hom dealer from us. Any mechanic can opprat e them easi Send for eatalol!. A Free Opinion the probable patenta­ bility iTlventi�n will readily gi. Established 1872. ���. MO�M., 2109 North Ninth St. State your requirement\> and get our adVIse. swin�. Louis, Mo. Ours the Oldest agency for securing patents ; it was established over sixty-five years ago. ]6.00. Send for our Special Offer ! ------ ------ --- fiutomobile Running Gears WITH PRESSED STEEL ANGLE IRON FRAMES Also all styles bodies.l:ulC>. with provision for circulation elec. Yearly subscription, $3. GILSON MFG. YOU WILL MAKE MISTAKE YOU NOT WRITE FOR INFORMATIQN.. TOOL MAKERS, EXPER I· M ENTAL PAIR WO ETC. EMEXT 23. , concern. 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. i\'1ounted on wheels o�· tonl ls. Let explain. From 9-in. Catalog free.r MUNN COMPANY, Inc. THE POWER CONTRACTOR'S FAVORITE ENGINE. . "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.ven any inventor furnishing with model sketch and a brief description the device question. Write once for generous sample bottle and Magneto Bulletin... BABBITT METALS. MIC . \-Vorl{s day NigJlt-makes prints any lenvth. 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. Eight sharp cut­ tmg edges..l1lal'.. Manufactured the The Ke)Jstone Safety Starling Handle Co. CIENTTFTC A:\I ERTCAN Sf' PP1.iliu(', in. CO. 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. water during long periods the life t>f the cell. The Bible ofthe aero enthusiast, experi­ menter, builder, aviator and advertiser. Sent FREE" A. L O. Don't scoff. 918 Chestnut St. STAI-:'RETT CO. Arrane-ed for Steam or Foot Power, Velocipede or Stand-up rrreadle. A E-For Sixty Ye:m' the Standard the WOJ'ld for Quality. 'Publishers '1. ALOE CO. , 4" Walnut Street, Philadelphia, Pa., Philadelphia, Pa., Port Washington, Wis. D WAT MOTOR . Don't take the side shows and miss the main show i the big tent., L'". 361 roadway, New ork, or 625 Street, Washington, C. WilliAMS BROS Ithaca. Try One., and all newsdeal ers. illustrated article published in Scientific meric.L, Write for Free Sample Manufactured by T Y C CO. how much it will cost, practical from archi· tecturaI and engineering standpoint ? These and other important questions relating the structure are discussed good, thorough. I TilE J"., 50c. 3 One not too light properly lubricate and keep lubricated any bearing (ballbearing ordinary bearing). ''''ashing . 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. It will not run out and leave contact points dry. engine made has wide range use. SENECA FALLS MFG. THE TEMPLE PUMP CO., 1 Legal Notices IN VENTORS are Invited communicate with Munn o.00 SI'JIId tor 232 page catalog No. trolyte because the latter constant, chemically, electrically and physically. Our IIand-Book Patents will sent free on request. (I'or sale everywhere. 1).cyc1e motorS. LA FAYETTE, IND. Improved bucket wheel construction.. l3-in."w York and London. The Express System Saves Money. DE P'T , /"'K'# TAPES AND RULES ARE THE BEST., Manufacturers, 417 West 15th SI. HOLTZER-CABOT GAS ENGINE JUMP SPARK and M. ('at nlog free."��;::;;·1J-Neatest, simplest and be,t on Ithe market., Athol. One boy does the work four men., Dept.water pres­ sure; lbs. 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. Send for Lathe Catalog., ROCKFORD, h. Easily lucked or released turning handle. any battery any time for half the CO'lt bearing of new battery. 625 Wash . S ENTI AME RICAN A ttache(J sny water faucet will deyelop lip to according: s i ze pipe and W:ltB!' pre!;,�llre., LEIB ST. 361 Broadway, New York WHAI ONE MAGNETO OIL ? January 4. A.01' for Mechanics find Tradesmen. Sold all garages, auto supply dealers, hardware and general stores-10c. J\dive Ag'ents wanted.. Sag naw; ich A. Accepted the authority. Strong, sirupie and durable. Send for catalo. With engines llorse powerR. For user:" Blue Print Paper pply Lanting Machines for making blue print paper linen. All communications are strictly confidential. 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