434 



THE INDIA RUBBER WORLD 



March I, 1921 



and rubber, particularly frictioned fabric from calender to bias 

 cutter. At this point in the system the fabric is weighed as it 

 passes over a certain section of track which is connected to a 

 8cale in the floor. 



The stock of tire cores is never allowed to rest on the floor, 

 but hangs on individual hooks. The tires are transferred in the 

 building process over the tracks which extend through the entire 

 building department into the curing room alongside the alleys 

 where the cores are transferred from the hooks into the molds 

 for curing. The saving in labor js particularly great when op- 

 erating the core equipment to capacity. — Lampson Company, Des 

 Moines, Iowa. 



dicator and recorder register instantaneously. The gas travel is 

 hastened by utilizing the main aspirator's exhaust in an auxiliary 

 aspirator for drawing the gas from the boiler up to the absorption 

 chamber, while the main aspirator draws the gas sample through 

 this. Suitable filters remove soot and dirt from the sample. 



The record is not intermittent but furnishes an autographic 

 history of the operation of each boiler for every second of the 

 day. The indicator guides the fireman in supplying just the right 

 amount of air to burn the fuel with least loss of heat up the 

 chimney. This recording equipment is designed primarily for 

 rough and ready boiler plant service. — Uehling Instrument Co., 

 71 Broadway, New York. 



NEW CO- RECORDING INSTRUMEINT 



Rubber manufacturers who arc striving to overcome fuel and 

 heat wastage in the boiler room will be interested in this new 

 model COi recording equipment, for which are claimed simplicity, 



quicker action and greater 



.Steam 



I^:^*— Gas inlet 



Principle of Operation of the COj 



Meter 



accessibility of parts. The 

 economy and compact- 

 ness of combining in one 

 machine means for de- 

 termining COz simultane- 

 ously from any number 

 of boilers up to a total 

 of six, are easily recog- 

 nized. 



A single unit equipment 

 for one boiler consists of 

 three principal parts, the 

 QOj meter proper, re- 

 corder, and auxiliary 

 The meter is placed wherever more con- 



boiler front indicator, 

 venient. Its function is to determine the CO. and then actuate 

 the boiler front indicator and recorder in the engineer's office 

 accordingly. An aspirator draws the gas con- 

 tinuously through first aperture A and then B. 

 Absorption of the CO, 

 content between the 

 two apertures causes a 



=1 



Indicator for 

 Boiler Front 



Recorder for Engi- 

 neer's Office 



Meter for Four 

 Boilers 



change of pressure or tension in chamber C which is transmitted 

 to the recorder and indicator. 



The COj meter consists of this analyzing mechanism and a 

 regulator. The regulator keeps the suction created by the 

 aspirator constant, thereby eliminating changes in tension between 

 apertures A and B, except those caused by absorption within 

 chamber C. It is the latter changes in tension which the in- 



MACHINERY PATENTS 



MACHINE FOR REFINING RUBBEJl 



AN .\tte.mpti;d improvement upon the ordinary chilled two-roll 

 refining mill is shown in Fig. 1. The essential parts of this 

 machine are a vertical hollow, water-cooled spindle A provided 

 with a stock feed-screw B and an enlarged conical portion C 

 which is a central obstruction filling in greater or lesser degree 

 the circular water-cooled die D. The adjustment of the opening 

 for passage of the stock is effected by vertical movement of sec- 

 tion E by the motion of screws F and G actuated by hand-wheel 

 and worm-gearing H and /. Below the die D a circular table 

 / is attached to the spindle A. The latter is driven by gear and 

 worm K and L. 



In operation the stock, fed into hopper M, is forced by screw 

 B downward through the adjustable circular space between the 

 die and spindle and emerges onto the table / refined from me- 

 chanical impurities. The advantages claimed for this machine are 

 a larger working surface in proportion to its size than with rolls 

 and that it obviates the difficulty of producing the necessary 

 pressure that rolls require. — William A. Gordon, assignor to 

 Birmingham Iron Foundry, both of Derby, Connecticut. United 

 States patent No. 1,364,549. 



MODIFIED FRICTION CALENDER 



Fig. 2 illustrates a vertical side elevation of a three-roll friction 

 calender modified by the addition of attachments so that two 

 rolls of fabric A and B may be friction-coated with rubber com- 

 position at the same time. The bank of stock is applied at points 

 C and D and the coated fabrics received on the rewinding rollers 

 E and F. The latter are operated by sprocket chains G and H 

 acting through sprocket wheels / and /. — Edward H. Scribner 

 and Harry .\. Bell of Revere, assignors to Revere Rubber Co., 

 Chelsea, both in Massachusetts. United States patent No. 

 1,364,211. 



TREAD MAKING MACHINE 



This macliine, illustrated in Fig. 3, in longitudinal vertical sec- 

 tion, is for building and curing tire tread bands. It comprises 

 the foundation plate A, frames B, and a number of radiating arms 

 C connected by circular braces D, the lower arms being secured 

 to the base plate. The standards and anns are duplicated on 

 each side of the machine. 



The outer ends of the arms C form a guideway in which is 

 mounted a guide E. On the lower end of each guide is a shoe 

 F, its inner surface forming the arc of a circle. Six of these 

 shoes when in their innermost positions, form a complete circle 

 of the size required for the outer circumference of the tread band. 

 Keyed to shaft C are two large hand-wheels H, H, for operating 

 each side of the machine. 



Just inside the frames, pinions / mesh with two sets of fan- 

 shaped gear sections /. The gear sections in each set of six are 

 placed in staggered relation and engage with pinion /, the rota- 

 tion of which rocks the segments and moves the slides E radially 



