US392827A - Valve for steam-heating apparatus - Google Patents

Description

2 Sheets-Sheet 1.

(No Model.)

J. H. SEWALL.

VALVE FUR STEAM HEATING APPARATUS.

Patented Nov. 13, 1888.

Ewen/Z01 James witness as, 25%; @612. fwd 0K5,

(No Model.) 2 Sheets-Sheet 2.

J. H. SEWALL.

VALVE FOR STEAM HEATING APPARATUS.

No. 392,827. Patented Nov. 13, 1888.

NITED STATES Parn'r rrrcra JAMES H. SElVALTr, OF PORTLAND, MAINE.

VALVE FOR STEAM-HEATING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 392,827, dated November 13,1888.

Application filed Soy tember 5, 1887.

To aZZ whom it 11mg concern:

Be it known that 1, JAMES H. SEWALL, of Portland, county of Cumberland, and State of Maine, have invented an Improvement in Valves for Steam-Heatin g Apparatus, of which the following description, in connection with the accompanying drawings, is aspecification, like letters on the drawings representing like parts.

In application for Letters Patent, Serial No. 231,565, filed by me March 19, 1887, a valve is shown and described adapted to be interposed between a main steam'supply pipe passing from end to end of a train of cars and the circulation-pipes contained within each car, by which the steam maybe admitted to the circulation-pipes oi any particular car of the train, or all of them, as desired. YVhen the car is placed at the rear end of the train, some means must be provided for controlling or shutting oil? the steam to prevent its escape; and this invention has for its object to provide the valves with suitable means for accomplishing this result. The valve shown and described in the said application comprises a valve-ease having main inlet and outlet ports communicating with the main steam-supply pipe and also with outlet and inlet ports communicating with the circulation-pipes, and also with suitable ports or escapes for the water of condensation, and a stem having two disks thereon is moved in the valve-case with relation to the ports, whereby, when the disks are in one position, steam may enter the valvecase through the main inlet-port and pass out through the ports leading to the circulationpipes, returning to the valvecase through other ports from the circulation-pipes, and finallyleaving the valve-case through the main outlet-port; but when the disks are in another position may enter the valve-case through the main inlet-port and immediately pass out through the main outletport, the circulation pipes being cut off.

In accordance with this invention a controlling device is provided for the main inlet and outlet ports of the valve-case,whereby the steam from the main supply-pipe may enter the valveease through the inlet-port and leave it through the outlet-port, or may enter the valve'case through the inlet-port, and

Serial No.2 lS,S14. (No model.)

upon leaving it through the outlet-port is checked.

The controlling device herein shown consists of a valve'case having an inlet and outlet port communicating with the main supplypipe and with an outlet and inlet port communicating with the mairrvalve case, and a piston or disk attached to a suitable stem is employed, said piston or disk moving with relation to the ports to accomplish the results specified. A suitable indicator is also provided for determining from within the car the position of the valve, disk, or piston.

Figure 1 shows in horizontal section a valve having a controlling device embodying this invention connected with it; Fig. 2, a side ele vation and partial section of the main valve and the controlling device or valve; and Fig. 3, a plan view of the indicator. Fig. 4 is a perspective view showing the main and auxiliary controlling-valves in operative relation to the pipes of a car-heating system.

The valve-ease I), having the main inlet and outlet ports 3 4 and the outlet and inlet ports 5 5 6 6, comn'iunicating with the circulationpipes contained within the car, the ports 7 S, for the escape of water of condensation, the stem d, having the disks d d, secured thereto and moving within the valve-case I), the limiting-stop c, and the toothed sector (1, which engages teeth out in thestem (P, are all asin the application referred to, to which reference may be had.

The valve-ease i, herein termed, for distinction, theauXiliary-valve case, and forming a part of the controlling device for the main valve, is attached to the valve-case b, preferably at its under side, said auxiliary valve case having inlet and outlet ports i i", communicating with the main steam-supply pipe, and also the outlet and inlet ports 1' i, which communicate by the inlet and outlet ports 8 4 with the valve-ease b.

A disk or piston, i, attached to a valve stem ,i,is adapted to move within the auxiliaryvalve easei with relation to the several ports, The valve-stem 6 moves in a suitable stuffing box, 20, at the end of the valve-ease z, and said stem has attached to its outer end a bent arm, i which arm isprovided at its outer end with teeth, as at i, engaged by a toothed sector, 2',

pivoted to a suitable arm, i. (See dotted lines, Fig. 1.) The sector 2' is attached to a vertical shaft, t, having its upper end squared, to be engaged by a suitable wrench to turn it, but will preferably have fitted upon it a cap, 5, (see Fig. 3,) which is fitted into the ring or frame 1' which latter is secured to or within a recess cut in the floor. The cap 5 is pro vided with a pointer, i and the ring has marks, indications, or graduations with which the dot-pointer 2' cooperates to determine the position of the disk with relation to the ports of the auxiliary-Valve case (I.

The auxiliary valve serves as a controlling device for the main valve, it controlling the passage of steam theretofor instance, when the disk 1' is in the position, shown by full lines, Fig. 2, the steam from the main steamsupply pipe enters the port i", passing thence through the port '6' and into the main-valve case I), through the port 3, returning to the auxiliary-valve case t through the port t'", leaving the said valve-ease b from the outlet-port 1?, or if the car is turned end for end the course of the steam will necessarily be re versed, the steam entering through the port and leaving through the port t. When the disk 2' is moved into the position indicated by the dotted line 30, the steam may enter the inlet port t" and continue in the manner above described; but upon returning to the auxiliaryvalve case its onward movement is checked by the said disk '5, while if the valve should be turned end for end the disk i, in order to accomplish the resultjnst named, will occupy a position indicated by the dotted line 25. These two extreme positions of the disk i are indicated upon the indicator within the car by the words rear, while the intermediate po sition-such, for instance, as shown in full lines, Fig. 2-is indicated by the word intermediate, or middle, or some equivalent word. Y Vhen the disk is in either of its extreme positions checking the progress of steam,

a port, a, at the lower side of the valve-case Z), is open, permitting the steam to pass through the said port and into a steamtrap, T, as an escape.

I claim 1. The main controllingvalve having the inlet and outlet ports 3 4, and a valve-stem provided with controlling disks or pistons, combined with the auxiliary valve comprising the valvecase t, having the inlet and outlet ports 2' i and the ports i i", the disk i and the valve-stem for moving it, and means controlled from within the car for moving said valve-stem, substantially as described.

2. The main controlling-valve having the inlet and outlet ports 3 4, and a valve-stem provided with controlling disks or pistons, the auxiliary valve having the inlet and outlet ports 2" t, and ports communicating with the main valve, the disk or piston moving within the auxiliary-valve case with relation to the ports,and means for moving it controlled from within the ear, combined with an indicator for determining the position of the disk or piston of the auxiliary-valve case, substantially as described.

3. The main controlling-valve having the inlet and outlet ports, and a valve-stem provided with controlling disks or pistons, the auxiliary valve with which the inlet and out let ports of the main valve communicate, said auxiliary valve having a main steam-supply pipe, the piston or disk i moving within the auxiliary-valve case with relation to the ports, and means for moving it, combined With the port a and the steam-trap T, substantially as and for the purposes described.

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

JAMES H. SEWALL.

\Vitnesses:

FRANK P. FoLEY, Gno. F. GOULD.

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