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