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