328 



THE INDIA RUBBER WORLD 



Fkbriary 1, 1921 



Scaling nuts or otlier suil.iblc means arc tu be used to prevent 

 leakage around the terminal posts of the individual cells. If 

 metallic scaling nuts are used, it is required that they be of lead- 

 antimony alloy throughout. 



Jars are to be of hard rubber and to conform in dimensions, 

 design and quality to the Standardization of Hard Rubber Stor- 

 age Battery Jars for Starting and Lighting Batteries' prepared 

 for the Hard Rubber Division of the War Service Committee of 

 the Rubber Industry adopted August 27 and August 28, 1918. 



Covers are to be of a good quality of hard rubber. They are 

 to be flat-top and bottom, or molded with flat top, free from acid 

 pockets, with single sealing flange. The cover of each cell is to 

 be provided with a filling aperture closed by a vent-plug of hard 

 rubber. The vent-plug may be of the bayonet or screw type. 

 Each vent-plug is 'o be provided with an outlet for the gas and a 

 baffle-plate or equivalent means to prevent slopping of the elec- 

 trolyte, or the escape of spray. Covers for cells of the batteries 

 specified as for medium and heavy truck service may be of the 

 double-flange type. They are to conform otherwise to the re- 

 quirements of this section. 



Sealing compound shall be of an acid-proof material that will 

 adhere firmly to both rubber and wood surfaces, and of such 

 consistency that it will not flow at 55 degrees C. (131 degrees F.) 

 and will not crack, or separate from the rubber at a temperature 

 of 20 degrees C. ( — 4 degrees F.) under static test. The sealing 

 compound must not be easily ignited. 



Trays shall be of close-grained seasoned hardworxl, such as 

 oak, maple, birch, etc., free from knots, checks or other imperfec- 

 tions, up to the standard known as Xo. 1. Ends are preferably 

 to be of one piece each, but may be of not more than two pieces. 

 provided the joint is reinforced. The trays are to be lock-cor- 

 nered and pinned top and bottom. Trays are to be painted inside 

 and outside with at least two coats of acid-proof paint. The trays 

 for batteries specified for medium and heavy truck service shall 

 be provided with spacers and tie-bolts, or other construction to 

 provide additional strength. 



Handles are to be of good quality steel or other malleable metal 

 securely attached to ends of tray. Handles are to project above 

 the intercell connectors to protect the connectors from the top 

 of the battery box, but the overall height is not to exceed that 

 previously specified. Handles are to be coated with lead and then 

 heavily coated with acid-proof paint. 



Electrolyte is to be a solution of sulphuric acid in pure water 

 of density not exceeding 1.310 at 25 degrees C. (11 degrees F.) 

 when the battery is fully charged. When specified by the War 

 Department for use in hot climates the density of acid at 25 

 degrees C. {11 degrees F.) shall not exceed 1.225 under the same 

 conditions. 



TESTS OF THE BATTERIES 



Measurements of tlic anipere-lumr capacity of the batteries are 

 to be made at the following rates of discharge, or more, and the 

 results are to be expressed as the capacity of 25 degrees C. {11 

 degrees F.). Tests are to be made with the normal density of 

 acid not to exceed 1.310 at 25 degrees C. {11 degrees F.). The 

 rates and the end-voltages required are as follows : 



Rate ni 

 Discharge 

 5-hr. . . 



20.inin. , 



Knd-\'oItagc 



Per Cell 



1.70 



1.50 



The battery shall be completely charged and allowed to stand 

 idle four weeks. The decrease in capacity at the end of this period 

 when discharged at the 5-hour rate shall not exceed 30 per cent 

 of the capacity as determined in the preceding paragraph. 



For 1 hour the battery is to be subjected to a vibration consist- 

 ing of a simple harmonic motion having a frequency of 1,000 

 vibrations per minute through a vertical displacement of 5 mm. 

 (0.2-inch). The battery is In be discharged at approximately 



the 5-hour rate. It must maintain a steady voltage and current. 

 The cell terminals must not become loose in the covers nor the 

 electrolyte flood the top of the battery. At the conclusion of this 

 test the cells will be examined for broken connectors, straps and 

 plates and for excessive se<liment. 



Samples of electrolyte are to be drawn with a clean pipette from 

 the cells when fully charged. The maximum allowable impurities 

 in the electrolyte taken from the cells are as follows : 



Coh.r none 



Suspended matter trace 



Platinum none 



Antimony and arsenic trace 



Manganese, i>er cent 0.005 



Iron, per cent 0.012 



Copper, per cent 0.005 



. Oxides of nitrogen. . . trace 



Chlorides calculated as clilrrine, per cent 0.012 



Organic matter , trace 



STATE OF BATTERIES AT TIME OF DEUVERY AS REQUIRED 



Batteries intended for immediate use or for wet storage where 

 suitable facilities are available are to contain electrolyte and be 

 fully formed and charged. 



Batteries in the bone dry condition are to have rubber separators 

 only or an approved equivalent. The plates are to be fully formed. 



When delivered in a moist condition the wood separators are 

 to be thoroughly wet w-ith water. The plates and separators are 

 to be free from acid in appreciable quantities. The vents of the 

 individual cells are to be sealed in an approved manner. The 

 plates are to be fully formed. 



When delivered dismantled for dry storage the plates are to be 

 fully formed and dry. Wood separators are to be kept moist with 

 sligluly acidulated water in a suitable non-metallic container with 

 cover. The individual parts are to be complete and to conform 

 to the various sections of these specifications. 



FIRST ANNUAL HIGHWAY TRANSPORTATION SHOW, 1921 



The Motor Truck Association of America, Inc., held its first 

 annual highway transportation show from January 3 to 8, in 

 New York City, at the armories of the Twelfth Regiment and of 

 the First Field Artillery. 



Apart from the display of trucks for every purpose, civil and 

 inilitary, and of indispensable accessories, special interest was 

 given to the show throughout the week by the plan of setting 

 apart each day of the show for the emphasis of certain important 

 aspects of motor transportation. These designations were: 

 Opening Day; Army Day; Motor Accident Prevention Day; 

 Transportation Day ; Farmers' Day, and Motor Truck Associa- 

 tion Day. On each special day were featured by appropriate 

 addresses, practical demonstrations and educational motion pic- 

 tures. 



Special exhibits were presented through the courtesy of the 

 United States Army, American Legion, Bureau of Economics, 

 Red Cross and Police Department of New York. 



Two exhibits among the accessories shown had rubber interest. 

 These were the Tru-Matic Tire & Tube Co.'s molded endless- 

 red rubber tube and the Martin Cushion Wheel. 



The Wellman-Seaver-Morgan Co. exhibited a four-cylinder 

 truck motor, 4i4 by 6 inches, 40— 60-h.p. at 1000—1500 r.p.m. and 

 displayed an inverted motor and one with cylinders removed for 

 better exhibition of their construction. 



"See The India Ui-nntR Woui.n, Ociobcr 1, 1920, page 50. 



A RUBBER-TIRED BOOK WAGON 



.\ variation of the well-known tea wagon is the book wagon, 

 adapted for use in libraries or for the home. It is a brautiful 

 and well-made piece of furniture, of solid mahogany with book- 

 trough at top and two extra shelves underneath for books, 

 magazines, etc. The book-wagon stands 29}<^ inches high and 

 runs easdly on rubber-tired wheels, silently and without marring 

 the finest floors or crushing the softest rugs. — Mark Cross, 404^ 

 Fifth avenue. New York City. 



