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