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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Our IIand-Book Patents will sent free on request.. (I'or sale everywhere. , 4" Walnut Street, Philadelphia, Pa., Athol. Please mention the Scientific American when writing- advertisers through wide range, and may far hig]her than would safe with the lead battery. MIC . Strong, sirupie and durable. Improved bucket wheel construction. Garages, Repair and General Jobbing Shops find this the ideal lathe for their work. 1). 695 Water Street, Seneca Falls, Y. D WAT MOTOR .l1lal'. Price cents mail. , concern. pipe.00."w York and London. Senel )'onr water pres;;nre and silt supply pipe. 1 for complete catalog today••teU8 all about how these high grade lilotors are built tbe largost plant the world devoted. GILSON MFG.50, cnsh with or­ d(·r. Sent FREE" A. 1\[0(. Catalog free. 625 Wash . Lowest cost because it delivers greatest available power per horse., ROCKFORD, h. Yearly subscription, $3. Y., Cincinnati, Ohio Fon G NSMITHS.. with provision for circulation elec. vehicle manufacturer using the battery reports that charged ex· hausted battery A·4 cellR the rate of 100 amperes for short tin1('. ALOE CO., 507 Olive Street, St.l:ulC>. Write once for generous sample bottle and Magneto Bulletin. The element made very com,;;act. in. CRAY MOTOR CO. -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.!!!_ and B K TYPES FOR MARINE AUTOMOBILE and STA· TIONARY ENGINES SEND FOR LAT EST BULLETIN 557 THE flOLTZER-CABOT ELECTRIC CO. Send for Lathe Catalog. 'Publishers '1. Don't scoff. CO. It will not run out and leave contact points dry. regard to securing valid patent protpction for their in­ v Trade-:llarks and CopyrightM registered. YOU WILL MAKE MISTAKE YOU NOT WRITE FOR INFORMATIQN. 1492-4 in.r MUNN COMPANY, Inc. For sale uno Co• Inc. THE EDISON CONCRETE HOUSE q How constructed. BAR . THE SEBASTIAN IS-INCH ENGINE LATHE HIGH GRADE LOW PRICE Automobile Builders. St., 50c. From 9-in. Eight sharp cut­ tmg edges. makes Blue Prints, Black Prints and Brown Prints. a ONE OIL COMPANY, BROADWAY, New York City., LEIB ST. A E-For Sixty Ye:m' the Standard the WOJ'ld for Quality. ., Dept. l\Ionev b:lcl;; for allY reason. Accepted the authority. 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., 308 Park St.ven any inventor furnishing with model sketch and a brief description the device question.. Don't take the side shows and miss the main show i the big tent. Send fOl Catalog I>o. I TilE J". All communications are strictly confidential. 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.water pres­ sure; lbs., 1 Legal Notices IN VENTORS are Invited communicate with Munn o. The Express System Saves Money. Order from your newsdealer from .. Sold all garages, auto supply dealers, hardware and general stores-10c. 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. 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. pressure, in. CO."��;::;;·1J-Neatest, simplest and be,t on Ithe market. \-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. DE P'T , /"'K'# TAPES AND RULES ARE THE BEST. Send for catalo. LA FAYETTE, IND. BORBEIN AUTO CO. WilliAMS BROS Ithaca. 361 roadway, New ork, or 625 Street, Washington, C..,an Supplement 685. pipe, Ibs. oxclusively the manufacture 2. EMEXT 23. L O. how much it will cost, practical from archi· tecturaI and engineering standpoint ? These and other important questions relating the structure are discussed good, thorough. ���. 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. four cylinder. 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. Send for our Special Offer ! ------ ------ --- fiutomobile Running Gears WITH PRESSED STEEL ANGLE IRON FRAMES Also all styles bodies. 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. PRICE 11<1. "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. 918 Chestnut St. W. Easily lucked or released turning handle. A., 2109 North Ninth St. STAI-:'RETT CO. any battery any time for half the CO'lt bearing of new battery. Louis, Mo. illustrated article published in Scientific meric. Ours the Oldest agency for securing patents ; it was established over sixty-five years ago. ''''ashing . Manufactured the The Ke)Jstone Safety Starling Handle Co. BABBITT METALS., Port Washington, Wis.00 SI'JIId tor 232 page catalog No.01' for Mechanics find Tradesmen. SENECA FALLS MFG. State your requirement\> and get our adVIse. Louis, Mo. Arrane-ed for Steam or Foot Power, Velocipede or Stand-up rrreadle. sYz single cylinder. water during long periods the life t>f the cell. HOLTZER-CABOT GAS ENGINE JUMP SPARK and M. trolyte because the latter constant, chemically, electrically and physically. engine made has wide range use. 361 Broadway, New York WHAI ONE MAGNETO OIL ? January 4. DETROIT. Any mechanic can opprat e them easi Send for eatalol!., Chicago, This our 58th year. M Broadway, New York B ranch Office. The Bible ofthe aero enthusiast, experi­ menter, builder, aviator and advertiser. Try One. Lowest fuel cost for runs Gasoline, Kerosene- Distillate, Gas Alcohol and has perfect ubrication.L, Write for Free Sample Manufactured by T Y C CO. 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. MO�M. Only pel'feet small motor made. /). Price cents., Philadelphia, Pa. 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. A Free Opinion the probable patenta­ bility iTlventi�n will readily gi. THE POWER CONTRACTOR'S FAVORITE ENGINE. Order yonI' motor hom dealer from us. A. For user:" Blue Print Paper pply Lanting Machines for making blue print paper linen., Manufacturers, 417 West 15th SI. TOOL MAKERS, EXPER I· M ENTAL PAIR WO ETC. 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. WILLIAMS, BROWN EARLE, Ine. Ball­ bearing, safety starting handles for all makes cars. 25c. THE TEMPLE PUMP CO. slow speed, high duty engine. - Every User Blue Prints Should Investigate the New EXPRESS System Blue Printing Automatic, saves half the cost.. Established 1872. Sag naw; ich A.blisbed 18IiO-ALOl<: Civil Engineering and Surveying Instruments DRA WING MATERIALS SIJPPLIES B . and states that pays better put over . each ' brought in- Istantly into u,e bal joint . Net price $5, cas witlt orrle-l'. ]8-B. ('at nlog free.. One boy does the work four men. In charging, the rate can varied 3 One not too heavy-will positively not gum clog, collect dust dirt, harden dry out. swin�. Write/orcatalogue once, mentioning thispaper. ]6.-SIX IMPORTA� T formulas. CIENTTFTC A:\I ERTCAN Sf' PP1. bottles. Let explain. Ruby St. connection..• 46 "St " Foot aml ar Power Screw Cutting Au��t LathesFOR FINE, ACCURATE WORK Send for Catalogue B. Patents and 11 Paten secured.cyc1e motorS. 3 One contains carbon residue, foreign matter, acid, impurities like all cylinder (mineral) oils. l3-in. J\dive Ag'ents wanted. Esb. With engines llorse powerR., L'"., and all newsdeal ers. "FREE" Write for Catalogue. Scale drawings of mac hine, construction details, subscribers' forum. WE LL DRILLING MACHINES Over sizes and 8tyles, for rilling either deep or shallow wells any kind soi rock. 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. The Sebastian Lathe Co•• 120 Culvert SI. i\'1ounted on wheels o�· tonl ls.iliu(', in. 3 One not too light properly lubricate and keep lubricated any bearing (ballbearing ordinary bearing). Both free