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