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