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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The nature the support rna· terials and the method applying the active material the plates enable the cell stand dead short circuits without injury. Established 1872. two cylinder. - Every User Blue Prints Should Investigate the New EXPRESS System Blue Printing Automatic, saves half the cost. in. and states that pays better put over . Sag naw; ich A. Send for our Special Offer ! ------ ------ --- fiutomobile Running Gears WITH PRESSED STEEL ANGLE IRON FRAMES Also all styles bodies. 1\[0(. , 4" Walnut Street, Philadelphia, Pa. Try One. "FREE" Write for Catalogue."��;::;;·1J-Neatest, simplest and be,t on Ithe market. Sold all garages, auto supply dealers, hardware and general stores-10c.. Send fOl Catalog I>o. sYz single cylinder. 918 Chestnut St. Arrane-ed for Steam or Foot Power, Velocipede or Stand-up rrreadle. 'Publishers '1. Louis, Mo. Let explain. Ours the Oldest agency for securing patents ; it was established over sixty-five years ago. L O. A., L'". STAI-:'RETT CO. ('at nlog free. CO. , concern., Athol. 695 Water Street, Seneca Falls, Y. ���. MO�M., Dept. DE P'T , /"'K'# TAPES AND RULES ARE THE BEST. Yearly subscription, $3. makes Blue Prints, Black Prints and Brown Prints., and all newsdeal ers. The element made very com,;;act. Improved bucket wheel construction. BABBITT METALS. Only pel'feet small motor made. each ' brought in- Istantly into u,e bal joint ., ROCKFORD, h. 1).!!!_ and B K TYPES FOR MARINE AUTOMOBILE and STA· TIONARY ENGINES SEND FOR LAT EST BULLETIN 557 THE flOLTZER-CABOT ELECTRIC CO. ALOE CO.cyc1e motorS. . THE EDISON CONCRETE HOUSE q How constructed. Patents and 11 Paten secured. Our IIand-Book Patents will sent free on request., Philadelphia, Pa. regard to securing valid patent protpction for their in­ v Trade-:llarks and CopyrightM registered. 361 Broadway, New York WHAI ONE MAGNETO OIL ? January 4.,an Supplement 685. /). Lowest cost because it delivers greatest available power per horse. 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.ven any inventor furnishing with model sketch and a brief description the device question. Sent FREE" A. Please mention the Scientific American when writing- advertisers through wide range, and may far hig]her than would safe with the lead battery. 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. Order from your newsdealer from ., 1 Legal Notices IN VENTORS are Invited communicate with Munn o. I TilE J". M Broadway, New York B ranch Office. Esb. Price cents.water pres­ sure; lbs. W. St."w York and London. Ruby St.00. SENECA FALLS MFG. Don't take the side shows and miss the main show i the big tent. LA FAYETTE, IND.. WilliAMS BROS Ithaca. a ONE OIL COMPANY, BROADWAY, New York City. Y. In charging, the rate can varied 3 One not too heavy-will positively not gum clog, collect dust dirt, harden dry out. EMEXT 23. 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. The Bible ofthe aero enthusiast, experi­ menter, builder, aviator and advertiser. 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., Cincinnati, Ohio Fon G NSMITHS. 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. THE POWER CONTRACTOR'S FAVORITE ENGINE. 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., 308 Park St. The Express System Saves Money.l1lal'.-SIX IMPORTA� T formulas. THE SEBASTIAN IS-INCH ENGINE LATHE HIGH GRADE LOW PRICE Automobile Builders., 2109 North Ninth St. 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. Manufactured the The Ke)Jstone Safety Starling Handle Co. \-Vorl{s day NigJlt-makes prints any lenvth. with provision for circulation elec. trolyte because the latter constant, chemically, electrically and physically. illustrated article published in Scientific meric.• 46 "St " Foot aml ar Power Screw Cutting Au��t LathesFOR FINE, ACCURATE WORK Send for Catalogue B. For sale uno Co• Inc. Send for Lathe Catalog. Garages, Repair and General Jobbing Shops find this the ideal lathe for their work. State your requirement\> and get our adVIse.l:ulC>.. bottles.. Easily lucked or released turning handle. Accepted the authority., Manufacturers, 417 West 15th SI. 25c. connection.. CIENTTFTC A:\I ERTCAN Sf' PP1., Port Washington, Wis. BAR . Write once for generous sample bottle and Magneto Bulletin. Net price $5, cas witlt orrle-l'. Order yonI' motor hom dealer from us. D WAT MOTOR . 625 Wash .. THE TEMPLE PUMP CO. l3-in. For user:" Blue Print Paper pply Lanting Machines for making blue print paper linen. From 9-in. WE LL DRILLING MACHINES Over sizes and 8tyles, for rilling either deep or shallow wells any kind soi rock. swin�.iliu(', in. TOOL MAKERS, EXPER I· M ENTAL PAIR WO ETC.01' for Mechanics find Tradesmen.. vehicle manufacturer using the battery reports that charged ex· hausted battery A·4 cellR the rate of 100 amperes for short tin1('. Equip Your Car With the "Webster" Safely Starting Handle, positive its action, absolutely prevents injury from back-kicks, adopted part 0/regular equipmentfor lco cars. four cylinder., 50c. J\dive Ag'ents wanted. One boy does the work four men. ]6. In this "can electricity" the solution s a mere liquid carrier ions-it has, O t speak, moods and tenses its own to catered the battery user. oxclusively the manufacture 2. ]8-B. Price cents mail. S ENTI AME RICAN A ttache(J sny water faucet will deyelop lip to according: s i ze pipe and W:ltB!' pre!;,�llre. 3 One contains carbon residue, foreign matter, acid, impurities like all cylinder (mineral) oils. BIotor for grmding, polishing, fans, sewing mtwhines for Doctors, Dl'ntists, Urn;!' �:)��:Il��l�d;�lfe!�$e;:'����f9���ei�� i �:�· tor and pulle:v 'olll)� $2. l\Ionev b:lcl;; for allY reason. Lowest fuel cost for runs Gasoline, Kerosene- Distillate, Gas Alcohol and has perfect ubrication. water during long periods the life t>f the cell. With engines llorse powerR. DETROIT. 1492-4 in. CRAY MOTOR CO. WILLIAMS, BROWN EARLE, Ine. A Free Opinion the probable patenta­ bility iTlventi�n will readily gi., 507 Olive Street, St. HOLTZER-CABOT GAS ENGINE JUMP SPARK and M.r MUNN COMPANY, Inc. 1 for complete catalog today••teU8 all about how these high grade lilotors are built tbe largost plant the world devoted. PRICE 11<1. Write/orcatalogue once, mentioning thispaper. Senel )'onr water pres;;nre and silt supply pipe. Catalog free. All communications are strictly confidential. Send for catalo. pressure, in. Any mechanic can opprat e them easi Send for eatalol!. 361 roadway, New ork, or 625 Street, Washington, C. Scale drawings of mac hine, construction details, subscribers' forum. Strong, sirupie and durable. It will not run out and leave contact points dry. BORBEIN AUTO CO. A. pipe. Ball­ bearing, safety starting handles for all makes cars. Louis, Mo., LEIB 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. CO. The Sebastian Lathe Co•• 120 Culvert SI. engine made has wide range use. A E-For Sixty Ye:m' the Standard the WOJ'ld for Quality.. Both free.L, Write for Free Sample Manufactured by T Y C CO. any battery any time for half the CO'lt bearing of new battery.50, cnsh with or­ d(·r. Don't scoff.00 SI'JIId tor 232 page catalog No. 3 One not too light properly lubricate and keep lubricated any bearing (ballbearing ordinary bearing).blisbed 18IiO-ALOl<: Civil Engineering and Surveying Instruments DRA WING MATERIALS SIJPPLIES B ., Chicago, This our 58th year. MIC . "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. i\'1ounted on wheels o�· tonl ls. ''''ashing . pipe, Ibs. slow speed, high duty engine. (I'or sale everywhere. Eight sharp cut­ tmg edges. GILSON MFG. how much it will cost, practical from archi· tecturaI and engineering standpoint ? These and other important questions relating the structure are discussed good, thorough