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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with provision for circulation elec. Sent FREE" A. L O. HOLTZER-CABOT GAS ENGINE JUMP SPARK and M. 361 Broadway, New York WHAI ONE MAGNETO OIL ? January 4.. The Express System Saves Money. Send for Lathe Catalog.r MUNN COMPANY, Inc. Any mechanic can opprat e them easi Send for eatalol!. CIENTTFTC A:\I ERTCAN Sf' PP1. each ' brought in- Istantly into u,e bal joint . One boy does the work four men. 25c.blisbed 18IiO-ALOl<: Civil Engineering and Surveying Instruments DRA WING MATERIALS SIJPPLIES B ., 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. 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. I TilE J". Don't scoff. Eight sharp cut­ tmg edges. All communications are strictly confidential. CRAY MOTOR CO. ]8-B. pressure, in., LEIB ST. WILLIAMS, BROWN EARLE, Ine. Send for catalo. THE POWER CONTRACTOR'S FAVORITE ENGINE. EMEXT 23. ('at nlog free. - Every User Blue Prints Should Investigate the New EXPRESS System Blue Printing Automatic, saves half the cost. The element made very com,;;act. engine made has wide range use. Price cents. TOOL MAKERS, EXPER I· M ENTAL PAIR WO ETC. Y. MIC . Esb. ]6., L'".-SIX IMPORTA� T formulas. 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. Yearly subscription, $3. , 4" Walnut Street, Philadelphia, Pa.!!!_ and B K TYPES FOR MARINE AUTOMOBILE and STA· TIONARY ENGINES SEND FOR LAT EST BULLETIN 557 THE flOLTZER-CABOT ELECTRIC CO. Arrane-ed for Steam or Foot Power, Velocipede or Stand-up rrreadle., Dept. (I'or sale everywhere. Scale drawings of mac hine, construction details, subscribers' forum., Port Washington, Wis. Senel )'onr water pres;;nre and silt supply pipe. 'Publishers '1. Send for our Special Offer ! ------ ------ --- fiutomobile Running Gears WITH PRESSED STEEL ANGLE IRON FRAMES Also all styles bodies.L, Write for Free Sample Manufactured by T Y C CO. W.50, cnsh with or­ d(·r. 918 Chestnut St. For sale uno Co• Inc.00. Established 1872. connection. In charging, the rate can varied 3 One not too heavy-will positively not gum clog, collect dust dirt, harden dry out. Both free. 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. It will not run out and leave contact points dry. l3-in. 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. Manufactured the The Ke)Jstone Safety Starling Handle Co. 3 One not too light properly lubricate and keep lubricated any bearing (ballbearing ordinary bearing). Write/orcatalogue once, mentioning thispaper. DE P'T , /"'K'# TAPES AND RULES ARE THE BEST."w York and London., ROCKFORD, h.01' for Mechanics find Tradesmen. any battery any time for half the CO'lt bearing of new battery. Ruby St. in. oxclusively the manufacture 2. i\'1ounted on wheels o�· tonl ls. 3 One contains carbon residue, foreign matter, acid, impurities like all cylinder (mineral) oils. pipe. Easily lucked or released turning handle. "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. THE EDISON CONCRETE HOUSE q How constructed. THE SEBASTIAN IS-INCH ENGINE LATHE HIGH GRADE LOW PRICE Automobile Builders. YOU WILL MAKE MISTAKE YOU NOT WRITE FOR INFORMATIQN. Lowest cost because it delivers greatest available power per horse. GILSON MFG. Please mention the Scientific American when writing- advertisers through wide range, and may far hig]her than would safe with the lead battery. M Broadway, New York B ranch Office. Order from your newsdealer from .. ALOE CO.l1lal'.,an Supplement 685. BORBEIN AUTO CO. Improved bucket wheel construction. Try One.water pres­ sure; lbs. MO�M. regard to securing valid patent protpction for their in­ v Trade-:llarks and CopyrightM registered., 50c. Let explain. PRICE 11<1., Manufacturers, 417 West 15th SI. 1\[0(. Garages, Repair and General Jobbing Shops find this the ideal lathe for their work. Don't take the side shows and miss the main show i the big tent. "FREE" Write for Catalogue. sYz single cylinder. illustrated article published in Scientific meric. ���. vehicle manufacturer using the battery reports that charged ex· hausted battery A·4 cellR the rate of 100 amperes for short tin1('., and all newsdeal ers. State your requirement\> and get our adVIse. l\Ionev b:lcl;; for allY reason. swin�. four cylinder. bottles. Ours the Oldest agency for securing patents ; it was established over sixty-five years ago.., 507 Olive Street, St. 361 roadway, New ork, or 625 Street, Washington, C. S ENTI AME RICAN A ttache(J sny water faucet will deyelop lip to according: s i ze pipe and W:ltB!' pre!;,�llre. WE LL DRILLING MACHINES Over sizes and 8tyles, for rilling either deep or shallow wells any kind soi rock."��;::;;·1J-Neatest, simplest and be,t on Ithe market. Write once for generous sample bottle and Magneto Bulletin. 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., Chicago, This our 58th year. Catalog free. Net price $5, cas witlt orrle-l'. 1). Sag naw; ich A. two cylinder. Accepted the authority. /).• 46 "St " Foot aml ar Power Screw Cutting Au��t LathesFOR FINE, ACCURATE WORK Send for Catalogue B. 1 for complete catalog today••teU8 all about how these high grade lilotors are built tbe largost plant the world devoted. LA FAYETTE, IND. Lowest fuel cost for runs Gasoline, Kerosene- Distillate, Gas Alcohol and has perfect ubrication. Ball­ bearing, safety starting handles for all makes cars. Louis, Mo.. BABBITT METALS.cyc1e motorS. THE TEMPLE PUMP CO. a ONE OIL COMPANY, BROADWAY, New York City. how much it will cost, practical from archi· tecturaI and engineering standpoint ? These and other important questions relating the structure are discussed good, thorough.00 SI'JIId tor 232 page catalog No. BIotor for grmding, polishing, fans, sewing mtwhines for Doctors, Dl'ntists, Urn;!' �:)��:Il��l�d;�lfe!�$e;:'����f9���ei�� i �:�· tor and pulle:v 'olll)� $2. The Sebastian Lathe Co•• 120 Culvert SI. A Free Opinion the probable patenta­ bility iTlventi�n will readily gi. Price cents mail. 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. Send fOl Catalog I>o. makes Blue Prints, Black Prints and Brown Prints. The Bible ofthe aero enthusiast, experi­ menter, builder, aviator and advertiser. Louis, Mo.ven any inventor furnishing with model sketch and a brief description the device question. Order yonI' motor hom dealer from us. St. A. J\dive Ag'ents wanted.l:ulC>. trolyte because the latter constant, chemically, electrically and physically., 2109 North Ninth St. slow speed, high duty engine. Strong, sirupie and durable.. DETROIT. Our IIand-Book Patents will sent free on request. BAR . 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. 625 Wash . D WAT MOTOR . Patents and 11 Paten secured. Only pel'feet small motor made. CO. ''''ashing . 1492-4 in. With engines llorse powerR. and states that pays better put over . WilliAMS BROS Ithaca.., Cincinnati, Ohio Fon G NSMITHS. \-Vorl{s day NigJlt-makes prints any lenvth. .. A. 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. For user:" Blue Print Paper pply Lanting Machines for making blue print paper linen.iliu(', in. From 9-in. water during long periods the life t>f the cell. 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. Sold all garages, auto supply dealers, hardware and general stores-10c. STAI-:'RETT CO., Philadelphia, Pa., 308 Park St. pipe, Ibs. -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., 1 Legal Notices IN VENTORS are Invited communicate with Munn o. CO.. SENECA FALLS MFG. , concern. A E-For Sixty Ye:m' the Standard the WOJ'ld for Quality