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