US796773A - Means for discharging fluids from drying-cylinders. - Google Patents

Description

No. 796,773. PATENTED AUG. 8, 1905. R. DA. "L'AGKABBRRY.

MEANS FOR DISGHARGINCT FLUIDS PROM DRYING CYLINDERS.

APPLICATION 2mm AUG. 24, 1904.

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PATENTED AUG. 8, 1905 R. D. TAGKABERRY. MEANS FOR DISGHARGING FLUIDS PROM DRYING CYLINDERS.

APPLICATION FILED AUG. 2-1, 1904.

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No. 796,773. PATENTED AUG. 8, 1905. B. D. TAGKABBRRY.

MEANS FOR DISGHARGING FLUIDS PROM DRYING CYLINDERS.

- APPLICATION FILED menu, 1904.

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UNITED STATES PATENT OFFICE.

ROBERT DANIEL TACKABERRY, OF LEWISTON, MAINE.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Application filed August 24, 1904. Serial No. 221,964-

To aZZ whom it may concern.-

Be it known that I, ROBERT DANIEL TAOKA- BERRY, a citizen of the United States, and a resident of Lewiston, in the county of Androscoggin and State of Maine, have invented a new and Improved Means for Discharging Fluids from Drying-Cylinders, of which the following is a full, clear, and exact description.

The invention relates to improved devices for expelling the air and water of condensation from drying-cylinders-for example,such as are disclosed in the prior patent to Paul, No. 643,198, dated February 13, 1900.

The object of the present invention is to simplify the devices as much as possible, and also to maintain uniform and equal pressures in the various parts of the system. I attain this end by providing outlets from the cylin der or cylinders extending to a steam-trap, which is preferably of the sort disclosed in my prior patent for steam-traps, No. 743,952, dated November 10, 1903, and in my copending application for steam-traps, Serial No. 178,977, filed October 29, 1903, and I establish by a pipe or equivalent means communication between the steam-space of the steamtrap and the steam-space of the drying-cylinder so that the rushes or pulsations of water passing into the trap from the cylinder will be prevented from raising the pressure in the latter. Such communicating-pipe is provided with a vent and stop valves facilitating the initial removal of the air from the cylinders, which air is forced by the steam through the said outlet-pipe into and through the trap and out into the atmosphere through the said communicating-pipe.

The invention resides in certain special features of construction and arrangement of parts, which will be fully hereinafter set forth, and particularly pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification,

in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 represents a side elevation of a drying-machine containing several dryingcylinders and illustrating my improvement applied thereto. Fig. 2 is an end elevation of the same with parts broken away, and Fig. 3 is a cross-section through one of the cylinders.

10 indicates the drying-cylinders, which, as here shown, are seven in number, revolubly mounted in a framing having hollow parts 11 and 12. Steam-supply pipes 14 pass into said hollow framing parts at one side of the machine and air and Water discharging pipes 15 pass from the hollow framing parts at the other side, the interiors of the cylinders communicating with the hollow framing parts, so thatsteam may be supplied to the cylinders and the air and water of condensation with drawn, all of which will be understood from the prior art, and particularly from the patent to Paul above referred to.

16 indicates a steam-trap, which may be of any desired sort, but preferably that forming the subject of my prior patent and also that of my pending application above noted. The pipes 15 run into a common extension 17 which conducts the air and water to the trap and from which the water is discharged through the pipe 18. Passing from the top part or steam-space of the trap 16 is an equalizing-pipe 19, which is best shown in Fig. 3, communicating with the steam-space of the drying-cylinder by running into the steamfeed pipe 14 at a point directly adjacent to the hollow frame part, so as to equalize at all times the pressures in the drying-cylinders and trap. The drawing illustrates the pipe 19 passing to the lower frame member 12; but it may also be applied to the upper frame member 11 in the same manner. Said pipe 19 is provided with an air-vent cook 20 and with a globe or hand valve 21, the globe or hand valve lying between the air-vent cock 20 and the drying-cylinder.

In the operation of the apparatus it is first necessary to expel the air from the dryingcylinders. To do this, the valve 21 should be closed, the air-vent cook 20 should be opened, and the valves 15 of the pipes 15 also opened. Steam is then admitted into the drying-cylinders through the pipes 14, causing air to be blown out through the pipes 15 into the trap and thence into the pipe 19 and out of the vent-cock 20. After all of the air has been expelled steam will begin to escape from the vent-cock 20, and this should then be closed and the valve 21 opened. The operation of the apparatus will then become normal, the steam entering the cylinders and the water of condensation being withdrawn through the pipes 15 and their connections, as explained in the Paul patent above referred to. When sufficient water accumulates in the trap, the same will be automatically expelled by the operation of the trap, as will be understood from the prior art.

As shown in Fig. 3, the pipes 15 have downwardly-extending legs 15, located in the cylinders, with scoops 15 attached to their ends, these pipes revolving with the cylinders and gathering the water of condensation therefrom each time that the pipes reach a position extending downward from the axial shafts of the drums. This causes the water to be expelled from the steam-cylinders in pulsations or gushes which tend to bring about successive increases of pressure within the trap, thus disturbing the uniform operation thereof. This, however, is avoided by the equalizing-pipe 19, which places the steamspace of the trap in communication with the steam-space of the drying-cylinder, and thereby maintaining a uniform pressure within these two vessels. By means of my invention, therefore, I not only provide very simple and efficient means for removing the air from the cylinders at the beginning of the operation, but I also prevent sudden rises of pressures in the trap and the erratic action incident thereto.

Various changes in the form, proportions, and minor details of my invention may be resorted to without departing from the spirit and scope thereof. 1 consider myself entitled to all such variations as may lie within the scope of my claims.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The combination with a drying-cylinder, of means for withdrawing the air and water therefrom, a trap to which said means discharge, and devices for venting the air from the trap. V

2. The combination with a drying-cylinder, of means for discharging the air and water therefrom, a trap to which said means lead, a pipe passing from the upper part of the trap, and an air-vent valve in said pipe.

3. The combination with a drying-cylinder, of means for discharging the air and water therefrom, a trap to which said means lead,

and an air-vent valve communicating with the trap for the purpose specilied.

t. The combination with a drying-cylinder, of means for conducting the water and air therefrom, a trap to which said means dis charge, an equalizing-pipe establishing communication between the trap and the cylinder for the purpose specified, and an air-vent devicein said equalizing-pipe.

5. The combination with a drying-cylinder having a steam-supply pipe communicating therewith,of means for withdrawing the water from the cylinder, a trap to which said means lead, an equalizing-pipe extending from the upper part of the trap to the steam-supply pipe of the cylinder directly adjacent to the cylinder for the purpose specified, and an airvent device in the equalizing-pipe.

6. The combination with a drying-cylinder having a steam-supply pipe communicating therewith, of means for withdrawing the water from the cylinder, a trap to which said means lead, an equalizing-pipe extending from the upper part of the trap to the steam-supply pipe of the cylinder directly adjacent to the cylinder for the purpose specified, an air-vent valve in said equalizing-pipe, and a vent-cock in said pipe between the air-vent valve and the steam-supply pipe of the drying-cylinder.

7. The combination with a drying-cylinder, of means for withdrawing the air and water therefrom, a trap to which said means discharge, the discharge of said means to the trap being located above the normal water-line thereof, whereby to permit air to enter the trap, and devices for venting the air from the trap.

8. The combination with a drying-cylinder, of means for conducting the air and water therefrom, a trap to which said means discharge at a point above the normal water-line of the trap, whereby to permit the airto pass into the trap, an equalizing-pipe establishing communication between the trap and cylinder, and an air-vent device in said equalizingpipe.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ROBERT DANIEL TACKABERRY.

Witnesses:

SAMUEL WV. KrNesToN, J .ERE J. COUGHLIN.

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