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