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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All communications are strictly confidential. 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. 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.l:ulC>. Don't take the side shows and miss the main show i the big tent. Arrane-ed for Steam or Foot Power, Velocipede or Stand-up rrreadle. 3 One not too light properly lubricate and keep lubricated any bearing (ballbearing ordinary bearing). Price cents mail. Eight sharp cut­ tmg edges. how much it will cost, practical from archi· tecturaI and engineering standpoint ? These and other important questions relating the structure are discussed good, thorough. THE TEMPLE PUMP CO. DETROIT. M Broadway, New York B ranch Office. I TilE J". a ONE OIL COMPANY, BROADWAY, New York City. One boy does the work four men. l\Ionev b:lcl;; for allY reason. Send fOl Catalog I>o. Order from your newsdealer from . In charging, the rate can varied 3 One not too heavy-will positively not gum clog, collect dust dirt, harden dry out."w York and London.• 46 "St " Foot aml ar Power Screw Cutting Au��t LathesFOR FINE, ACCURATE WORK Send for Catalogue B.. swin�. BAR . State your requirement\> and get our adVIse., and all newsdeal ers.00 SI'JIId tor 232 page catalog No. ALOE CO., 507 Olive Street, St.!!!_ and B K TYPES FOR MARINE AUTOMOBILE and STA· TIONARY ENGINES SEND FOR LAT EST BULLETIN 557 THE flOLTZER-CABOT ELECTRIC CO. 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. Net price $5, cas witlt orrle-l'. THE SEBASTIAN IS-INCH ENGINE LATHE HIGH GRADE LOW PRICE Automobile Builders. W. 1 for complete catalog today••teU8 all about how these high grade lilotors are built tbe largost plant the world devoted.00. The Express System Saves Money. 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. pipe. Both free.. vehicle manufacturer using the battery reports that charged ex· hausted battery A·4 cellR the rate of 100 amperes for short tin1('. Ruby St. Ours the Oldest agency for securing patents ; it was established over sixty-five years ago., 50c.l1lal'. trolyte because the latter constant, chemically, electrically and physically. Manufactured the The Ke)Jstone Safety Starling Handle Co., LEIB ST. 361 roadway, New ork, or 625 Street, Washington, C. A. water during long periods the life t>f the cell. The element made very com,;;act. 3 One contains carbon residue, foreign matter, acid, impurities like all cylinder (mineral) oils. MO�M.. 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. THE POWER CONTRACTOR'S FAVORITE ENGINE., Cincinnati, Ohio Fon G NSMITHS. PRICE 11<1. 1\[0(. makes Blue Prints, Black Prints and Brown Prints. Esb. Our IIand-Book Patents will sent free on request. A. From 9-in. BABBITT METALS. Lowest cost because it delivers greatest available power per horse. STAI-:'RETT CO. Easily lucked or released turning handle., 308 Park St. Y. with provision for circulation elec. TOOL MAKERS, EXPER I· M ENTAL PAIR WO ETC. It will not run out and leave contact points dry.. Strong, sirupie and durable., Philadelphia, Pa., 1 Legal Notices IN VENTORS are Invited communicate with Munn o., ROCKFORD, h. pipe, Ibs. Send for catalo., Athol.ven any inventor furnishing with model sketch and a brief description the device question. Sent FREE" A.L, Write for Free Sample Manufactured by T Y C CO. For sale uno Co• Inc.-SIX IMPORTA� T formulas. With engines llorse powerR. Any mechanic can opprat e them easi Send for eatalol!.. , 4" Walnut Street, Philadelphia, Pa. Send for our Special Offer ! ------ ------ --- fiutomobile Running Gears WITH PRESSED STEEL ANGLE IRON FRAMES Also all styles bodies. 1492-4 in. EMEXT 23. Accepted the authority.. 918 Chestnut St. four cylinder. "FREE" Write for Catalogue. i\'1ounted on wheels o�· tonl ls. regard to securing valid patent protpction for their in­ v Trade-:llarks and CopyrightM registered. 25c. J\dive Ag'ents wanted. slow speed, high duty engine. CIENTTFTC A:\I ERTCAN Sf' PP1. two cylinder. WILLIAMS, BROWN EARLE, Ine. SENECA FALLS MFG. Yearly subscription, $3. pressure, in. WE LL DRILLING MACHINES Over sizes and 8tyles, for rilling either deep or shallow wells any kind soi rock. A Free Opinion the probable patenta­ bility iTlventi�n will readily gi. St. \-Vorl{s day NigJlt-makes prints any lenvth. Send for Lathe Catalog. The Bible ofthe aero enthusiast, experi­ menter, builder, aviator and advertiser., Port Washington, Wis.r MUNN COMPANY, Inc. BORBEIN AUTO CO. Garages, Repair and General Jobbing Shops find this the ideal lathe for their work.. ]6. 361 Broadway, New York WHAI ONE MAGNETO OIL ? January 4. in.. 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.iliu(', in. bottles. ''''ashing . l3-in. sYz single cylinder. illustrated article published in Scientific meric. The Sebastian Lathe Co•• 120 Culvert SI. GILSON MFG. 695 Water Street, Seneca Falls, Y. - Every User Blue Prints Should Investigate the New EXPRESS System Blue Printing Automatic, saves half the cost. Senel )'onr water pres;;nre and silt supply pipe. WilliAMS BROS Ithaca. "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. Sag naw; ich A.blisbed 18IiO-ALOl<: Civil Engineering and Surveying Instruments DRA WING MATERIALS SIJPPLIES B . -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. ]8-B.50, cnsh with or­ d(·r. A E-For Sixty Ye:m' the Standard the WOJ'ld for Quality. CO. , concern. Scale drawings of mac hine, construction details, subscribers' forum. Price cents. engine made has wide range use. Order yonI' motor hom dealer from us. Please mention the Scientific American when writing- advertisers through wide range, and may far hig]her than would safe with the lead battery. Louis, Mo. Lowest fuel cost for runs Gasoline, Kerosene- Distillate, Gas Alcohol and has perfect ubrication. YOU WILL MAKE MISTAKE YOU NOT WRITE FOR INFORMATIQN., Manufacturers, 417 West 15th SI. 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. Ball­ bearing, safety starting handles for all makes cars. Established 1872. DE P'T , /"'K'# TAPES AND RULES ARE THE BEST.cyc1e motorS. Catalog free. MIC . Sold all garages, auto supply dealers, hardware and general stores-10c. 625 Wash . 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. oxclusively the manufacture 2.01' for Mechanics find Tradesmen.,an Supplement 685., L'". 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. The nature the support rna· terials and the method applying the active material the plates enable the cell stand dead short circuits without injury. . Try One. Improved bucket wheel construction. Write/orcatalogue once, mentioning thispaper. THE EDISON CONCRETE HOUSE q How constructed. Only pel'feet small motor made. HOLTZER-CABOT GAS ENGINE JUMP SPARK and M. 1). For user:" Blue Print Paper pply Lanting Machines for making blue print paper linen., Dept. each ' brought in- Istantly into u,e bal joint . ('at nlog free. Louis, Mo. (I'or sale everywhere., 2109 North Ninth St. Don't scoff., Chicago, This our 58th year. 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. 'Publishers '1. and states that pays better put over .water pres­ sure; lbs. LA FAYETTE, IND. /)."��;::;;·1J-Neatest, simplest and be,t on Ithe market. connection. any battery any time for half the CO'lt bearing of new battery. ���. CO. S ENTI AME RICAN A ttache(J sny water faucet will deyelop lip to according: s i ze pipe and W:ltB!' pre!;,�llre. Patents and 11 Paten secured. D WAT MOTOR . CRAY MOTOR CO. Write once for generous sample bottle and Magneto Bulletin. L O. Let explain