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