US498014A - Pressure regulator or governor - Google Patents

Description

(No Model.)

R. B. LINCOLN. PRESSURE REGULATOR OR GOVERNOR. No. 498,014. u PatentedMay 23, 1893,

m: norms PETERS co wnmourna, WASHINGTON, u. c.

UNITED STATES PATENT OFFICE.

ROBERT E. LINCOLN, OF BOSTGN, MASSACHUSETTS.

PRESSURE REGULATOR OR GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 498,014, dated May 23, 1893.

Application filed December 10, 1892. Serial No. 454,704. (No model.)

To all whom it may concern.-

Be it known that I, ROBERT B. LINCOLN, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Pressure Regulators or Governors, of which the following is a specification.

This invention relates to pump governors or pressure regulators for steam, air, gas or water; and it has for its object to provide a governor of the class mentioned that shall be compact in construction and adapted to operate accurately with varying pressure.

To these ends the invention consists in the improvements which I will now proceed to de, scribe and claim.

Of the accompanying drawings forming a part of this specification, Figure 1 represents a longitudinal sectional view of a governor embodying my improvements. Fig. 2 is a side elevation of the valve of the same. Fig. 3 is an elevation of the valve casing. Fig. 4 is a section on line 44, Fig.1. Fig. 5 is a modi' fied form of the governor hereinafter explained. Fig. 6 is a section on line 6-6 of Fig. 1.

The same letters of reference indicate the same parts in all the figures.

Referring first to Figs. 1 to 4, inclusive, a a. represent the shell or casing, which is preferably formed in two sections. The upper section a has cylindrical chamber 17, to the upper portion of which is suitably secured a cylinder 0 having a piston d fitted therein. Said piston is provided with a rod or stem c which extends from the lower end of the piston longitudinally of the casing and has upon its lower end a valvef adapted to fita casing suitably secured in the shell a, said casing being provided with suitable ports h h h 7i for the admission of steam from the inlet pipe or passage c', the area of said openings being controlled by the valve fwhich regulates the admission of the steam to the passage j leading to the mechanism to be operated and regulated.

It represents a volute spring situated in the chamber 6. The lower portion or base of said spring rests upon an annular support Z and the upper or tapered portion of the spring bears against a collar m formed upon the stem 6, the arrangement being such that the piston and valve are normally supported in such position as to insure a full opening by the valve of the ports h in the casingg which openings may be reduced by the admission of steam to the upper portion of the cylinder 0. The steam acting upon the upper end of the piston depresses the same against the tension of the spring it, said depression causing the valve f to correspondingly close the openings or ports h in the casing g and thus reduce the area of the latter to the required extent.

For the admission of steam to the cylinder 0, I connect the said cylinder with the low pressure side of the valve f by means of a pipe 0 o the upper end only of which is shown, see Figs. 1 and 6. In this pipe is a valve 0 which is a globe valve of well known construe tion adapted to be operated by hand and provided with a pipe 19 leading therefrom and having a similar valve q for the removal of condensation from the cylinder, said pipe 19 being connected with the bottom of the chamber b for a like object, as will be readily understood by reference to Fig. 1. The normal position of the piston d is just below the pipe 0 therefore water of condensation in the cylinder and said pipe may be removed through the pipe 13.

As shown in Figs. 1 and 3 the valve casing is formed with two series of ports 72. and has annular seats 2 2 2 2' formed upon its interior surface at opposite sides of said ports adapted to co-operate with annular projections 3 3 3 3 on the valve f. When the valve fis in the position shown in Fig. 1, which is its highest position, the ports h 71 are fully open. When the valve is depressed from said position the projections 3 3 act to partially close the ports and when the depression of the valve is continued until the projections 3 3 coincide with the seats 2 2, and the projections 3' 8' coincide with the seats 2 2' the ports are entirely closed. The valve is there fore required to make an excursion of considerable length. i

It will be seen that the efficient action of a valve necessarily having a long excursion or movement is largely dependent upon the construction of the spring which supports it against the valve closing pressure. When a valve thus operated is controlled bya helical spring as ordinarily, the variation of press ICO than any other form of spring. Thirdly, the

shape and length of the volute spring renders it effective in this class of governors, its form making the pressure constant throughout the entire range of movement of the spring. so

that itselasticity is not reduced by a heavy load. The spring supporting ring Zrests upon the upper end of an adjusting screw 7" by which the tension of said spring may be regulated (see Fig. 1).

I have shown in Fig. 5 in place of the cylinder with its valve operating piston, a diaphragm s, the casing t of which is secured to the shell a in the same manner as the cylinder shown in Fig. 1, said casing having anopening it for the admission of steam to the chamber 1) above the diaphragm. This openingu is to be understood as connected in practice, by a pipe similar to the pipe 0' 0 above described; and water of condensation above i the diaphragm may be removed by means of The steam pressany suitable connection.

ure acting on the diaphragm depresses the valve in the same manner as heretofore described.

I claim- 1. In a governor, the combination of the shell or casing having inlet and outlet pascember, A. D. 1892.

sages, a valve controlling communication between the passages, a pressure receiving chamber supported by and above the said casing, a device such as a piston in said chamber, connected with the upper end of the stem of the valve and adapted to be moved by an increase of pressure in the direction required to close the valve, a volute spring between the valve and piston, and arranged to yieldingly support the valve against the closing pressure, means for admitting steam to the pressure chamber, a cup-shaped support for the base of the volute spring, and means for adjusting said support vertically, substantially as described.

2. In a governor, the combination of the shell or casing having inlet and outlet pas sages, a valve controlling communication between the passages, a pressure receiving chamber supported by and above said casing and 1 receiving the stem of the valve, a pressure transmitting device such as a piston connected with the upper end of the valvestem in said chamber a collar on on said stem within the chamber, the adjusting screw 0" surrounding the stem and extending through the base of the chamber, the cup-shaped support resting on the screw 0', a volute springinterposed between the support and collar, and means for admitting steam to the pressure chamber, substantially as described.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 1st day of De- ROBERT E. LINCOLN. Witnesses:

O. F. BROWN, ARTHUR WV. CRossLEY.

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