US333817A - Governor - Google Patents

Description

(No Model O. B. BOSWORTI-I.

N. PETERS, Phammho m lmr. \Vashinglon. D,C

NlTED STATES PATENT OFFICE.

CHARLES R. BOSWORTH, OF EVERETT, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO THE NEW ENGLAND MANUFACTURING COMPANY, OF

BOSTON, MASSACHUSETTS.

GOVERNOR.

QEECIFEZCATION forming part of Letters Patent N0. 333,817, dated January 5, 1886.

(No modehl T at whom it may concern.-

Be it known that I, CHARLES B. BOSWORTH, of Everett, county of Middlesex, State of Massachusetts, have invented an Improvement in Governors, of which the following description,

in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention has for its object the produc- 1C tion of a governor for directacting or reciprocating steam-pumps, whereby any increase in the established speed of the pump will,through an air-compressing mechanism to be described, eflect automatically the movement of the main or throttle valve, admitting steam into the pump,and decrease the supply of steam to the pump until the quantity of water or other liquid entering it accords with the quantity which it is desired that the pump shall discharge, or

vice versa.

The features of my invention will be hereinafter described, and set forth in the claims.

Figure 1, in side elevation, represents a portion ofa steam-pump with my governor added,

and Fig. 2, in vertical section, on an enlarged scale, represents the chamber in which the air is compressed, the diaphragm therein and the parts moved by it to actuate the th rottle-valve; Fig. 3, a modification to be referred to, and Fig.

0 4 a detail of the screw to vary the area of the.

inlet to the dash-pot.

The pump A, its steam-chest A, its pistonrod A the connecting-rod A, the arm A, and the rocker-shaft A are substantially as in the Jamieson pump,represented substantially in United States Patent No. 155,728; but it will be obvious that my invention may be applied to any other usual reciprocating or doubleacting pump-such as the Blake or Knowlesby but slight changes in the devices for con.- necting the piston of the air-pump, to be described, with the piston of the steam-pump, so that the two may have stroke and stroke alike.

At the end of the steam-chest A, l have mounted a bracket, or, of sufficient strength to support the cylinder 12 of an ordinary air-pump, it having a piston, not shown but of ordinary construction, attached to the inner end of a piston-rod, b, which is herein shown as joined by a link, I), to a lever or arm, I), attached to the rock-shaft A the latter being common to the Jamieson pump referred to. The cylinder 12 of the air-pump has usual valves at each end to open inwardly, alternately following the direction of the piston in the said cylinder, so as to supply the cylinder with air to be forced out at the next stroke of the piston. The air. drawn into theair-pump from the atmosphere is discharged therefrom through a pipe, a, 6g having a suitable check-valve at a into the l chamber a, composed, as herein shown, of two plates, (1. a the said chamber containing a diaphragm, c,- or it might be a piston, as shown at c in Fig. 3, the compressed air entering the chamber acting upon but one side of the said diaphragm or piston, as will be readily under-' stood. The plates at a are shown as supported on standards 0' c, erected in a baseplate, 0 provided with a curb, c, and with a hollow sleeve-like guide, 0*, the space 0 between the said curb and guide forming a dash-pot, into which descends a piston, 0 attached to the rod d, which moves the throttlevalve (1'. The base plate a is shown as supported by the studs d erected upon the cap d of throttlevalve case d the latter being connected in usual way with the steam-chest of the pump, and receiving steam in usual manner and discharging it into the steam-chest. The valvecase (1 is shown as provided with a detachable annular seat, d, having ports, the throttle-valve d, having suitable ports to co-operate with those of the said seat, and according to the position of the valvevertically admit more or less steam into the steam-chest. The throttle-valve-moving rod d near the said valve is extended through a stufling-box, e, and outside the stuffing-box is surrounded by a spiral spring, a, one end of which is acted upon by an adjustable nut, 6 screwed upon the said rod, and thereafter the said rod is extended through the guide 0, above which the piston c is attached to it, and the end of the rod is provided with an adjustable sleeve, f, which enters a hole in the plate a and bears against the under side of or supports the central part of the diaphragm c, or the piston, whichever may be used. The spring 0, as herein shown, normally acts upon the rod to keep the diaphragm .or piston 0 against the plate a, or at the inlet side of the chamber a", and also keeps the valve open, the extent to which the valve is normally held open depending upon the amount of steam required to run the pump at the speed desired. The normal position for the valve to furnish an amount of steam to secure for the pump an established speed will be regulated by adjusting the sleevef on the rod d.

Referring to Fig. 2, the valve is shown as fully opened to permit the passage of steam through it into the steam-chest. Steam being admitted to the valve-case and into the steamchest will start the main piston and its rod A and the latter, by the connection described, will reciprocate the piston-rod and piston of the air -pump, stroke for stroke, in unison. The plate a* is provided with a threaded hub having port-s g, which are more or less closed by the adjusting-nut g, the latter, if in position to fully uncover the ports 9, permitting the discharge into the atmosphere through the said ports of all the air forced into the chamber (L or against the diaphragm c by the airpump, so long as the steam-pump is running at the desired or established speed. In practice this nut will be so set as to partially cover the said ports 9 and permit the discharge into the atmosphere of but a part of the air forced into the chamber a and as a consequence the air when forced into the said chamber in quantity greater than can escape through the ports 9 will commence to act upon and move the diaphragm or piston 0 until the throttle-valve isbrought to such position as will insure the passage through it ofjust the quantity of live steam necessary to run the pump at the speed desired; but if the speed 01" the pump is increased beyond the desired, or What is intend- 7 ed to be the established, speed, the air-pump,

working in unison with the main portion A", forces an eXtra amount of air into the chamber a and acting upon the diaphragm or piston 0 moves it to partially, or it may be temporarily wholly, close the ports of the throttle-valve, and as the speed of the pump is decreased and the quantity of compressed air delivered into the chamber a is correspondingly decreased the spring 6', thestrength of which is in excess of the normal pressure of the air on the diaphragm or piston 0, as sumes control of the rod (l and moves it to open the throttle-valve ports to the extent desired for the regular or established speed of the pump. The dash-pot prevents too sudden movement of the rod 01 and throttle-valve to cut off the live steam, and by the screw it in the piston c the movement of the throttlevalve due to the spring 6 is regulated so that it is not too sudden.

The throttle-valve herein shown is of common construction, and instead of it I may employ any other usual valve capable of operating to control the steam as described.

I do not desire to limit my invention to the nut g to more or less close the ports 9 of the chamber in which the air is compressed, for instead I might use a petrock, m, as shown in full lines, Fig. 2, or any equivalent valve. I do not, however, broadly claima receiverprovided with a movable diaphragm and with an outlet having an adjustable valve applied to it for regulating the escape of fluid that is forced into the receiver by a supply-pump, the said diaphragm being connected by a series of levers with the throttle-valve of an engine Whose speed is to be governed.

I claim 1. The combination, with a steampump, of the bracket a, secured in an upright position on the end of the steam-chest A, the air-pump cylinder b on said bracket, and connections with the valve-movement of the steampump, the chamber a connected by pipe at with the air-pump, the diaphragm c in said chamber, the valve-rod d, carried by said diaphragm, and the throttle'valve of the steam-pump, all substantially as shown and described.

2. The throttle-valve case d valve (1, and rod (1, the cap (1*, supporting the standards (1 d", the plate 0 standards 0 c, mounted there on, and the air-chamber a, supported on said standards and provided with adiaphragm, c, carrying the rod of the throttle-valve, combined with an air-pump and connections therefor with the steam-pump, to operate it harmoniously with the speed of the pump, substantially as described.

3. The combination, with asteampump, an air-pump attached to and operated by the same, and an air-chamber supported upon standards over the throttle-valve of the steampump, of the bed-plate 0 arranged upon the said standards, the curb 0 the head or piston 0, arranged in said curb, and the throttlevalve and its rod operated by a diaphragm on said air-chamber, the latter carrying the pis-" ton c and operating it in its curb as a dash pot, substantially as described.

4. The air-pump,,and means, substantially as described, to reciprocate its piston in unison with that of the piston-rod of the pump the speed of which is to be regulated, a ported chamber to receive air compressed by the said air-pump, and a diaphragm or piston arranged in the said chamber, and a. valve-moving rod actuated thereby, combined with means, substantially as described, to more or less close the ports in the chamber, and with the spring 6 and the adjustable sleevef, to operate substantially as described.

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

CHARLES 13. BOSWORTH.

Witnesses:

G. WV. GREGORY, WV. H. SIGsToN.

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