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