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