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