US231274A - churchill - Google Patents

Description

(NoModeL J D LL. 3Sheets Sheetl.

Governor. No. 231,274.- Patented Aug. 17,1880.

fay-Z I I I a l! I 1 I N. PEIERS. PHOTO-MTHOGRAPHER. WASHINGTON. D (2v (No Model.) 3 Sheets-Sheet 2.

J. D. CHURCHILL.

Governor. No. 231,274. Patented Aug. 17,1880.

MPEIERS, FHOTD-LITHOGRAPHEE WASHINQTGN; 0.0.

SSheets-Sheet 3. J. D. CHURCHILL.

(No Model.)

Governor. No. 231,274. Patented Aug. 17,1880.

N-PETERS, PHDTO-LITHOGRAPHER, WASHINGTON. D C.

UNITED STATES PATENT OFFICE.

JAMES D. CHURCHILL, OF UPPER HOLLOWAY, GREAT BRITAIN.

GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 231,274, dated August 17, 1880.

Application filed June 29, 1880.

To all whom it may concern:

Be it known that I, J AMIES DIXON CHURCH- ILL, of Upper Holloway, in the county of Middlesex, Kingdom of Great Britain and Ireland, have invented new and useful Improvements in Governors, (for which I have obtained a patent in Great Britain, No. 4,977, bearing date December 5, 1879,) of which the following is a specification.

My invention has for its object improvements in governors, and relates particularly to that class of apparatus for this purpose wherein the throttle or regulating valve of the engine to be controlledis operated by apiston worked in an auxiliary cylinder by the pressure of fluid,the admission and emission of the fluid from this auxiliary cylinder being regulated by a valve connected to the governor, which is, by preference, of that class wherein a vessel containing liquid is provided with baffles and with a spindle carrying vanes or blades driven through gear from the engine to be controlled, which spindle Iwill call the vane or brake spindle; but governing or brake gear (by which I mean resisting apparatus) other than vanes may be employed in connection with my invention.

According to myinvention the vane or brake spindle has fixed upon it a frame, which supports at right angles to the spindle an axis able to turn in the said frame, hereinafter called the frame-axis. On this axis is fixed a cross frame or bar, which extends through and beyond the frame on the spindle, and is provided near its ends with anti-friction wheels or rollers. On the frameaxis is also fixed a sector with teeth, which are in gear with the teeth on another sector fixed on a spindle driven from the engine to be controlled, hereinafter called the drivingspindle. The driving-spindle is arranged in the same axial line as the vane or brake spindle, and between them is arranged concentrically a spindle, hereinafter called the intermediate spindle, one end of which enters a hollow or recess in the driving-spindle. The intermediate spindle is provided with two cross-pieces or projections situate one opposite and near to the anti-friction wheels or rollers on the cross frame or bar, the other opposite and near to a collar, hereinafter mentioned, which en- (No model.) Patented in England December 5, 1879.

circles the driving-spindle, and is movable in the direction of the axis of that spindle. This collar, when moved, as hereinafter mentioned, operates upon a forked lever or equivalent device connected with the valve of the auxiliary cylinder. The movable collar on the drivingspindle is drawn or pressed toward the cross frame or bar by the action of a spring or springs, or other equivalent means.

When the apparatus is in use the drivingspindlebeing itself driven from the engine to be controlled--imparts motion, through the sector-gear already mentioned, to the vane or brake spindle. The vanes or blades or other governing-gear are thereby caused to revolve.

Sudden increase in speed of the engine above that for which the apparatus is set is checked as follows: The driving spindle, by somewhat overrunning the vane or brake spindle, causes, through the sector-gearing, a partial rotation of the frame-axis, thus tilting or inclining the cross frame or bar, so that, through one of the anti-friction wheels or rollers, it moves the intermediate spindle, thus causing the collar which surrounds the driving-spindle to move in the direction of the axis of that spindle and in opposition to the said spring. The motion of the collar operates upon the forked lever or connection already referred to, and moves the valve of the auxiliary cylinder, thus causing its piston to operate the throttle or regulating valve of the engine to be controlled, so as to reduce the steam-supply thereto.

Apparatus according to my invention may be more or less modified in detail without departure from the characteristic features of my invention.

In some'cases I make the auxiliary cylinder adjustable in such manner as to enable me to direct] y connect the piston-rod at various angles with the throttle or regulating valve of the engine to be controlled. I also in some cases arrange the auxiliary cylinder at a distance from the governing apparatus, suitably connecting the said cylinder with a steam or other actuating-fluid chest arranged in proximity to the governor proper, and provided with ports controlled by a valve connected with and operated by the intermediate spindle of the governor. 1 may in some cases return the valve of the auxiliary cylinder to the position the governor has moved it from by means of a twisted bar worked by the piston of the auxiliary cylinder, and which operates one end of a lever whose other end is suitably connected to the intermediate spindle of the governor, the valve-rod of the auxiliary cylinder being connected to an intermediate part of this lever.

Referring to the drawings, Figure 1 shows, in sectional elevation, an apparatus for regulating the supply of steam to an engine. Fig. 2 is an elevation at right angles to Fig. 1. Fig.3 is a plan with parts removed. Fig. 4 is a sectional elevation of a portion of the apparatus at right angles to Fig. 1.

The figures show what I esteem the most convenient arrangement of parts whereby I operate the vane or brake spindle from the driving-spindle and cause the valve of the auxiliary cylinder to he adjusted by movement of the intermediate spindle in the direction of the axis of the driving-spindle consequent on variation between the speed of the driving-spindle and that of the vane or brake spindle.

Fig. 5 shows the cross frame or bar in plan. Fig. 6 is a cross-section in the line (1 D of Fig. 1.

Similar letters of reference indicate corresponding parts in all the figures.

The figures represent the novel parts, with so much of the ordinary parts as is necessary to indicate their relations thereto.

1 is the vessel, provided with battles 2 and charged with water or other liquid. 3 is the vane or brake spindle, and 4 are its vanes. This spindle has fixed upon it a frame or holding piece, 5, which supports at right angles to the spindle an axis, 6, able to turn in the said frame,and which I call the frame-axis. This frame-axis 6 has formed with or fixed to it another frame,or a bar, 7, which extends through theframe or holding piece 5 on the spindle, and is herein referred to as the tilting frame. It is provided near its respective ends with anti-friction wheels or rollers 8 9. 0n the f rameaxis 6 is fixed a sector, 10, which has bevelteeth and is in gear with another sector, 11, also having bevel-teeth, and which is fixed on a spindle, 12, driven from the engine to be controlled. This spindle 12 is the one I call the driving-spindle. It is arranged in the same axial line as the vane or brake spindle 3, and between them is arranged concentrically the intermediate spindle 13, one end of which enters a hollow or recess, 12*, in the drivingspindle 12. The intermediate spindle 13 is provided with two cross pieces or parts, 14 and 15, situate respectively opposite and near to the anti-friction wheels or rollers 8 9 of the tilting frame 7, and opposite and near to a collar,16, surrounding the driving-spindle 12, and movable lengthwise of that spindle, two slots or holes being formed for this purpose through the wall of the hollow part of the spindle 12. (See Fig. 6.) The collar 16 rests on 17, which isaring fixed to the projecting parts of 15. The movable collar 16 is arranged to operate (when moved as hereinafter mentioned) a forked lever or equivalent, 18, through which the valve of the auxiliary cylinder is actuated. The movable collar 16 on the driving-spindle 12 is drawn or pressed toward the tilting frame 7 by the action of a spring, 19, or equivalent means. When the apparatus is in use the driving-spindle 12, which is itself driven from the engine to be controlled, imparts motion through the sector-gear 10 11, already described, to the vane or brake spindle 3. The vanes or blades 4 in this arrangement are thereby caused to revolve in the liquid in the vessel 1, and in opposition to the resistance that liquid offers to such revolution.

Increase in speed of the engine above that for which the apparatus is set is checked as follows The driviug spindle 12, by somewhat overrunnin g the vane or brake spindle 3,causes, through the sectors 10 11, a partial rotation of the axis 6, thus tilting or inclining the frame or bar 7, so that, through the anti-friction wheel or roller 8 or 9 at the raised end of the frame or bar acting against the cross piece or part 14, as in Fig. 4, the intermediate spindle 13 is moved lengthwise, upward, thus causing movement, lengthwise ofthe driving-spindle 12, and in opposition to the spring 19, of the collar 16, surrounding the spindle 12, and which collar 16, through the forked lever 18, or other connection, moves the valve-rod 31 of the auxiliary cylinder 20, thus causing its piston (not shown) to move the piston-rod 22 upward, so as to operate the throttle or regulating valve of the engine to be controlled, so as to reduce or stop the steam-supply thereto.

It is to be observed that the stop-valve of the engine when wide open allows only sufficient steam to pass for full work, and that my regulating apparatus is intended to check the running away of the engine when work is wholly or partially taken off the engine.

The apparatus is adjusted to suit the required normal speed of the engine by means of the screw 19", on which is fitted a nut, 19", connected by a chain, 19, passing under a pulley, 19, with spring 19.

1 is a pipe, (provided withascrew-plug, 1", having a small hole through it,) through which the vessel 1 is charged with liquid.

Some parts of the invention may be used with good effect without the whole; but I prefer the whole used together, as shown.

In the preceding description and drawings the resisting apparatus shown is that in which a liquid retards the motion of vanes; but it will be readily apprehended that balls or other masses suspended by rods so as to act centrifugally and engender resistance by friction against the surrounding case, or various other retarding agencies, may be used as sub stitutes for the vanes and liquid.

in a modified arrangement the slide or valve of the auxiliary cylinder 20 is operated through the medium of one rocking shaft, which is supported in bearings and has attached to it at one end a lever, one end of ICC whichlever may be held down by a spring operated by the collar 16. At the other end of they rocking shaft is an arm connected to the valve-rod. In other respects this appara- 5 tus resembles that described with reference to the preceding views.

I can arrange the auxiliary cylinder horizontally and screw it down to a base-plate,

and after it has been so fastened down I con.- nect it to the valve-box by pipes. This is a convenient arrangement, as it enables the auxiliary cylinder to be fastened down to the required angle to suit a particular application and afterward to be connected to the valvebox.

I can use two springs connected by studs or pins to the collar 16, the centers of the two springs and the center of the ring being allin the same vertical plane as the axis of the intermediate spindle. To the lower end of each spring I attach a chain, like 19", which I pass under a pulley, like 19, and at its other end attach to a splinter-bar arrangement centered on a nut adjustable by a screw-adjusting arrangement resembling 19 19 What I claim is- 1. In a governor, the combination of three spindlesnamely, a driving-spindle, (actuated by the engine to be controlled,) a vane or brake spindle, (provided with means for retarding its rotation,) an intermediate spindle, all these spindles being in the same axial lineand a tilting cross frame or bar, the whole so arranged and connected that whenever the engine to be controlled turns the said drivingspindle so fast as to overrun or turn faster than the vane or brake spindle, then the intermediate spindle will be caused to move in the direction of the common axial line, substantially as and for the purposes hereinabove set forth.

2. In a governor, the combination, with connection therefrom to the slide or valve of an auxiliary cylinder, the whole so constructed and arranged that said collar shall be operated by the endwise movement of said intermediate spindle, and shall then Work the said slide or valve, substantially as and for the purpose specified.

3. In a governor, the combination, with the driving-spindle 12, vane or brake spindle 3, intermediate spindle 13, cross pieces or parts 14 15, collar 16, and lever 18, of the frame or holding piece 5, axis 6, tilting frame or bar 7, and sector-gear 10 11, all constructed, ar ranged, and operating substantially as described, for the purposes specified.

4. The governor described for regulating the supply of steam to steam-engines, having the driving-spindle 12, vane or brake spindle 3, intermediate spindle 13, collar 16, lever 18, means for impartingendwise movement to said intermediate spindle, the vanes 4 on the spindle 3, to retard the rotary movement of said spindle, and the spring 19, screw 19, nut 19, chain 19, and pulley 19 for returning the slide or valve of the auxiliary cylinder 20 to its normal position after it has been moved therefrom by the action of the governing mechanism, all substantially as and for the purposes hereinabove set forth.

JAMES DIXON OH URGHILL.

Witnesses:

F. J. BROUGHAM,

Clerk to Mr. Wise, Whitehall Place, London.

H. T. WALKER,

7 Whitehall Place, London, 8'. W.

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