US519785A

US519785A - Goveefob

Info

Publication number: US519785A
Authority: US
Publication date: 1894-05-15
Anticipated expiration: 1911-05-15

Description

(No Model.) 5 Sheets-Sheet 1.

G. J. .ALTHAM. GOVERNOR.

No. 519,785. Patented May 15.1894.

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(No Model.) 5 Sheets-Sheet 2.

G. J. ALTHAM.

GOVERNOR.

No. 519,785. Patented'May 15, 1894.

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(No Model.) 5 Sheets-Sheet 3.

G. J. ALTHAM.

GOVERNOR. No. 519,785. Patented May 15,1894.

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No. 519,785. Patented May 15,1894.

INVENTU I WTNEssr-zs:

UNITED STATES PATENT OFFICE.

GEORGE J. ALTHAM, OF SWANSEA, MASSACHUSETTS.

GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 519,785, dated May 15, 1894. Application filed June 12, 1893. Serial No- 477.313. (No model.)

To all whom it may concern.-

Be it known that I, Gnonen J. ALTHAM, of

Swansea, in the county of Bristol and State.

of Massachusetts, have invented certain new and useful Improvements in Governors, of

I which the following is a specification.

This invention relates to an improvement 1n governors, and has been designed especlally for application to the style of motor Illustrated in my former patent, No. 47 5,957, issued May 31, 1892.

The accompanying drawings illustrate a construction for carrying out the invention.

Figure 1 shows an elevation of the motor, as viewed from one side, with the improved governor applied thereto. Fig. 2 shows an elevation of the same parts, as viewed from another side. Fig. 3 shows a sectional view of the motor and admission valves, and parts of the governor, other parts of which appear 1n elevation. While in reality the valves are staggered, the section is represented as belng through the middle of all of them. F g. 4 shows a top plan view of the governor. Fig. 5 shows a longitudinal section of the governor, with the parts in their normal relatlon. Fig. 6 shows a similar section of some of the parts, with the governor-balls thrown out to the limit of their movement. Fig. 7 shows a vertical section on line 7-7 of Fig. 3. Figs. 8, 9,10, 11,12,1e,14,15,1e, and 17 show details of the various parts of I the mechanism. a

each of the ports b, and a spring 01 inserted behind the valve, tends to seat the valve over the port. Each valve is slotted transversely, as shown at d and provided with a projection 01 in the slot and formed with an inclined upper side or shoulder d A reciprocal bar engages the slots of all the valves, and is adapted to engage the inclined shoulders d and thereby retract the valves against the action of the springs.

For the sake of compactness, the following construction is employed: The valves are staggered, as shown in Figs. 2 and 7, and the bar which engages them is composed of two portions e and e, which are preferably two separate pieces sweated together. Each portion extends through alternate valves, and is formed with offsets e which receive the proj ections at, and have inclined lower ends e to engage the shoulders at. The bars extend centrally through the valves with which they co-act, as best illustrated in Fig. 7, and it will be seen that, by making the bar double and correspondingly arranging the valves, the parts are compacted in smaller compass than if one bar engaged all the valves, for the 0dsets e may overlap in the double arrangement. The inclines e of the bar are not equidistant, but are-graded, so that the valves do not work simultaneously, but successively (see Fig. 3).

A bushing f. is fastened in the upperend of the steam-chest c, and a rod f extends through said bushing and is affixed to the upper end of the bar e e. Said rod may slide in the bushing, but is prevented from turning bya key f fastened in it and engaging a groove f in the bushing. A frame g is erected on the upper side of the casing a, and supports an internally-threaded rotary sleeve g;

and the upper end of the rod f carries a screw f which engages the threads of said sleeve. Movements of the screw from end to end of the sleeve are sufficient to open and close all the valves d. A crown-wheel h is supported in the frame g so asto turn with the sleeve 9', and is preferably formed integral with said sleeve. The frame g aifords bearings for a shaft 72., which extends across the crown-wheel h, and carries a pinion 72. meshing therewith; and a sleeve h", mounted on said shaft so as turn independently thereof, carries a pinion h, also in mesh with the crown wheel. The shaft 72. has a clutchmember k on one end, and'the sleeve 72. carries a cylindrical casing 77. which extends over said clutch-member h and is provided at its outer end with clutch-teeth 71 The letter i designates an elongated sleeve, which is supported in a hearing if erected on the casin g a, and incloses a shaft onwhich it may slide but may not turn.

The sleeve 7' of said head. The inward-extending armsof the bell-cranks are pivotally connected with ears 7' on the sleeve t'. The head j has a cylindrical chamber, which houses a spring j, bearing at one end against the end wall of said chamber, and at the opposite end against the sleeve i, thus tending to hold the balls inward and the clutch-member t in engagement with the clutch-member k Under this relation of parts, which may be termed the normal relation, such a direction of rotation of the crown-wheel his produced through the pinion h as to cause the bar e e to rise and consequently open the valves 01 and admit fluid to the motor-Wheels. The maximum speed of the'motor is regulated by the tension of the-springj, andthe tension may be adjusted by means of a nut j engagingscrewthreads j on the shaft t Access is gained to the said nut, for the purposeof turning it, through an-opening j in the head j. :When the increasing speed of the motor throws theballs out, thisimparts to the sleeve- 1' a sliding movement, which draws the clutch. member '5 out of engagementwith the clutch-- member if, and interlocks it with the clutchteeth h". Then the crown-wheel It will be moved in the reverse direction to that in which it has before been driven, as itis now. drivenby the pinion M. This causes the bar; 6 e to move downward, and the springs d; move the valves toward their respective ports; During the operation of the motor, the} clutch-member i is constantly oscillating be-{ tween the clutches 72. and 71. and alternately engaging them, and thereby the speedof the motor is kept substantially uniform.

Auxiliarygoverning means are provided, to; act in case of a failure of the balls to prop-{ erly perform their work.

A tappet-rod it extends into a borein the rod), and has a head adapted to abut the ends of the bore. The upper end of this tap pet-rod is connected with one arm of a bellcrank lever 10*, pivoted to the frame g; and the other armof said lever is connected with a rod it which is fitted to slide through a portionof the bearing 11', and carries a forked head k ,:straddling a collar 70 on the'sleeve i.

Continued rotationof the crown-wheel in either direction,'caused by failure of the balls to work, brings one end or the other of the bore in the rod against the head 70' ofthe tappet-rod, and, by moving said rod,shifts the sleeve t', through the bell-crank lever k and rod 70 and disconnects the clutches that "are in mesh.

The shaft i is positively driven by a chain m, connecting it with the main-shaftm of the motor.

It is evident the invention disclosed may be carried out by other means than here shown, and therefore is not limited to the construction by which I have chosen to illustrate it.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. In a fluid motorhaving-a plurality of admission ports, a plurality of separate and 1ndependent valves, one for each port, and means controlled by the speed of the motor for separately actuatingsaid valves.

2. In a fluid motor having a plurality of'admission ports, a plurality of Separate and independent valves, one for each port, a reciprocal bar adapted to separately actuate said valves, and means forgoverning the bar by the speed of the motor.

3. i In a fluid-motor havingaplurality of admission ports, a spring-pressed valvefor'each port having an inclined shoulder, a reciprocal bar having inclines to engage said shoulders, and means for governing said bar by the speed. of the motor.

4. 'In a fluid motor having a-plurality of admission ports,a spring-pressedvalve for'cach porthaving'an inclined shouldensaid valves being staggered, a double bar having inclines to engage saidshoulders, each portion of the bar engaging alternate valves, and means for governing said bar by the speed of the motor.

5. A governorfor fluid motors; comprising in its construction a reciprocal bar controlling the admission-valve-or valves, a screw carried by said bar, a rotary screw-threaded sleeve engaging said screw, a crown-wheel fast with saidsleeve, a shaft extending across I the said crown-Wheel and carrying a pinion at one endin meshtherewith and acl-utch- "member at the opposite end, a sleeve inclosing said shaft and rotatable thereon, said sleeve carrying a pinion in mesh with-the crown-Wheel and a cylindrical casing projecting beyond the shaft and having an-internal clutch-part, a governor-shaft driven by the motor, a longitudinally-'movable sleeve on said shaft and carryinga clutch-member within the said cylindricalcasingand adapted to make connection with theclutchqnemher on the first-namedshaft or that onthe sleeve surrounding the latter, and governorballs on the governor-shaft and controlling the longitudinally-movable sleeve.

6. A governor for fluid motors,eomprising in its construction-a reciprocal bar controlling the admission valve .or valves, a screw carriedby said bar, a rotaryscrew-threaded sleeve engaging said screw, a crown wheel fast with said sleeve, a shaft carrying a pinion in-mesh withsaid wheel and a clutchmember, a sleeve'rotatable on said shaft and carry-ing a pinion in mesh'with the crownwheel and a clutch-member, a governor-shaft driven by the motor, a longitudinallymovable sleeve on said shaft and carrying a clutch-member between the two firstnamed clutch members and adapted to interlock with either, the sleeve being out of alignment with the first-named shaft and sleeve, and governor-balls on the governor-shaft and controlling the longitudinally-movable sleeve.

7. A governor for fluid motors, comprising in its construction a reciprocal bar controlling the admission valve or valves, a screw carried by said bar, a rotary screw-threaded sleeve engaging said screw, a governor-shaft driven by the motor, reversible means for connecting said shaft with the screw-threaded sleeve and governed by the speed of the motor, and auxiliary governing means compmsing a tappet-rod in engagement with the screw, and suitable connections between said tappet-rod and the governor-shaft, substantially as described.

In testimony whereof I have slgned my name to this specification, in the presence of two subscribing Witnesses, this 3d day ofJune, A. D.'1893.

GEORGE J. ALTHAM. Witnesses:

C. F. BROWN, A. D. HARRISON.