July i, 1904. J 



THE INDIA RUBBER WORLD 



341 



circular casing, containing the air valves operated by the lever. 

 The base containing the diaphragm is connected to heater or 

 press by means of pipe B~. To the top is connected the air 

 supply pipe A°, and the air discharge pipe A\ which latter is 

 connected to diaphragm valve B 1 . 



The diaphragm valve B 1 is placed on the steam line to the 

 heater, and is of the globe type. On the bonnet is screwed a 

 cast iron frame, in the top of which is secured a rubber dia- 

 phragm. The stem of the valve is sliding, surrounded by a 

 volute spring, and topped with a wooden saucer, resting against 

 the rubber diaphragm. When the latter is actuated, it presses 

 against the saucer which forces down the sliding stem, com- 

 presses the spring and closes the valve. When the air dis- 

 charges, the diaphragm collapses; the steam pressure under 

 the seat of the valve, by the aid of the spring, forces back the 

 stem, and opens the valve. 



The pressure governor operates thus: A weight equivalent 

 to the pressure denoting the temperature desired, is placed on 

 the hanger at the end of the lever. Cock B" admitting com- 

 pressed air to the governor is opened, and steam turned into 

 the heater or press at the hand valve D-. The steam pressure 

 in the heater or press is communicated to the diaphragm of the 

 governor, through the pipe B-, and when the desired pressure 

 nas been reached, the diaphragm actuates the lever, which in 

 turn operates the air inlet valve in the upper casing B, permit- 

 ting the passage of air into the pipe A" , compressing the dia- 

 phragm in steam valve B l , forcing down the stem and shutting 

 off the steam. When the pressure falls the fractional part of a 

 pound, the governor diaphragm collapses slightly, lowers the 

 lever, closing the air inlet valve, and at the same time opening an 

 air discharge valve, which relieves the steam valve diaphragm of 

 the air pressure, causing it to collapse, and permitting the steam 

 valve to open again. During the curing process the diaphragm 

 steam valve B 1 is rarely wide open, or fully closed, for the rea- 

 son that the governor is so sensitive that it keeps the valve 

 throttling, responding instantly to the slightest change of pres- 

 sure, and delivering just the requisite amount of steam to main- 

 tain the vulcanizer at the exact temperature or pressure de- 

 sired. 



The clock C and diaphragm steam valves C 1 and C 2 consti- 

 tute the time device of the system. The valve C 1 is on the 

 steam supply line to the heater, and when actuated by the clock, 

 it opens and blows out steam. The clock dial is marked for 

 60 or more minutes, moving from left to right. At the o of 

 the dial, the lever of a pneumatic valve projects and engages 

 a spindle projecting above the top of the case. The clock is 

 provided with a pointer or hand, which can be set for the time, 

 and then clamped to the spindle or shaft. 



Compressed air is supplied by pipe A 5 and connected with 

 valves C 1 and C~ by A'\ operating as follows: Air cock C is 

 opened admitting air to the pneumatic valve of the clock, the 

 hand is set for the time required for the cure. The hand trav- 

 els to the left, and at the expiration of the time, it will trip the 

 lever of the pneumatic valve, and thus turn on air into pipe A'\ 

 which will operate the diaphragms of valves C 1 and C 3 , there- 

 by shutting off and blowing out the steam, so that without the 

 necessity of handling any valves, the heater may be opened 

 and goods taken out. The operation of the clock is independ- 

 ent of that of the governor. 



A special feature of this system is that either or both the 

 governor and time device can be instantly thrown out of ser- 

 vice by merely closing the air cocks B s and C s in case of acci- 

 dent, and the heater can be operated by hand in the usual way. 



Besides showing the application of the pressure governor and 

 the ti me device, the diagram illustrates a correct plan of piping 



for a hose heater, with the necessary fittings and their best lo- 

 cation. 1) represents the steam supply from boiler, and 

 Z>' D 1 D 1 -D 1 the 2" steam supply to heater with three 1" in- 

 lets. This supply is so piped as to give an equal volume of 

 steam to each of three inlets, insuring a uniform distribution of 

 steam in the heater. D* represents l" steam supply to bottom 

 of heater with two inlets, and E E discharge pipe from heater. 

 F F represents the air blow off valves, which should be at least 

 i%" to vent the air quickly. 



G G represents the mercury thermometers, screwed into spe- 

 cial fiuings, insuring steam circulation. // represents similar 

 fitting for a recording thermometer. This fitting is provided 

 with steam circulation cock, also with opening for attaching 

 steam gage and pressure governor connection. / represents 

 the ordinary spring pressure gage. J J represents the record- 

 ing thermometer with its connecting tube, which can be 25 or 

 more feet in length. A' represents the heater, and L the steam 

 separator. 



The application and operation of the pressure governor is 

 virtually the same for a press, and the same general plan of 

 steam supply should be used — i.e., uniform distribution of 

 steam to the platens. Mechanical goods presses running at 

 the same heats can be piped in groups, so that one pressure 

 governor can be used to control the steam in all of them. As 

 many as twelve or more presses may be controlled by one gov- 

 ernor, with absolute certainty. 



NEW DRIER FOR FIRE HOSE. 



THE new rotary fire hose drier shown in the illustration is 

 designed for use in fire stations. As will be seen, it is 

 cylindrical in form, occupying a space only 4 feet square and 8 

 feet high, which in itself is a recommendation where space is 

 limited. In this drier the wet hose is subjected to currents of 

 air which evaporate all moisture. 

 The rotary motion of the hose very 

 materially aids the work of the ex- 

 haust fan at the bottom of thecyl- 

 inder. The hose in the case rests 

 lightly upon cylindrical racks, with 

 sufficient space between coils to pre- 

 vent contact. The kind of motor 

 used depends upon the available 

 motive power, electricity being pre- 

 ferable. The motor revolves the 

 hose shaft and fan, causing a strong 

 current of air (about 3000 feet a 

 minute) to pass rapidly through the 

 drier and over and around the hose, 

 the exhaust fan at the bottom re- 

 volving five times as fast as the 

 hose, creating double currents of air. 

 The rate of speed can be regulated at will, the whole operation 

 being under perfect control at all times. It winds and un- 

 winds as easily as a ball of yarn. It can be operated by one 

 man, who can handle 600 feet of hose at one charge with no 

 trouble and practically no labor. The device is substantially 

 constructed, all the interior work being of iron, steel, and wood, 

 the exterior or casing of wood natural finish, the whole pre- 

 senting a neat appearance. The rotary motion of the hose very 

 materially aids the work of the exhaust fan at bottom of the 

 cylinder. The cost is less than that of the hose towers in com- 

 mon use. Manufactured by the recently incorporated Rotary 

 Fire Hose Drier Co., No. 910 Cumberland street, Lebanon, 

 Pennsylvania. 



