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