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