US300705A - gardner - Google Patents

Description

(No Model.)

R. W. 8v J. W. GARDNER.

G0VBRN0R.

No. 300,705. 110.0011000011110 V17, 1884.

Y vs: Inventors Attorny UNiTED STATES PATENT' OFFICE.

ROBERT W. GARDNER AND JOHN W. GARDNER, OE oUiNoY, ILLINOIS, AssrGNoRs rro THE GARDNER GOVERNOR COMPANY, OE sAME PLAGE.

GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 300,705, dated June 1'7, 1884.

' Application tiled February Q7, 1884. (No model.)

To all whom it may concern.-

Beit known that we, ROBERT W. GARDNER and JOHN W. GARDNER, of Quincy, Adams county, Illinois, have invented certain new 5 and useful Improvements in Governors, of

which the following is a specification.

This invention-.relates to centrifugal governors for steam-engines, 85o.

In United States Letters Patent No. 287,822, granted November 6, 1883, for an improvement in governors, upon the application of Robert WV. Gardner, is set forth a governor in which the balls are supported upon the upper free ends of vertically-arranged bladelike springs which serve as the main centripetal elements. In that device the outward movement of the-balls was ina path having a curvature determined by the sweep of the springs, the tendency of the ball as it flew outward being downward, which downward tendency was communicated to asliding sleeve provided with radial arms upon which the balls impinged. The valve-stem or regulating-rod was so attached .to the sleeve as to 2 5 partake of its movements. l

The present invention presents many of the peculiar characteristics of the governor set forth in the above-mentioned patent, which may be incidentally referred to in connection with the description of the present device.

The present invention will be fully understood from the following description, taken in connection with the accompanying drawings, in which- Figure 1 is a front elevation, part section, of a governor embodying our improvements; Fig. 2, a vertical section upon the line b of Fig. 1, as viewed in the direction indicated by the arrow c; and Fig. 3, a side view of one. of the balls and its immediate attachments as viewed in the direction indicated by the arrow c on Fig. l.

In the drawings, A represents the housing of a governor, of the form commonly employed in governors, arranged in direct connection with the steam-valve operated; B, a

stiff tube with its lower end rigidly secured inv the housing,with its axis corresponding with the axis of the governor; C, abevel-gear t- 5o ted to revolve freely upon the tube; D, the

pulley-shaft of the governor; E, the bevelgear on the pulley-shaft, by which motion is given to the gear C, and through itto the centrifugal parts of the governor; F, a sleeve tted to revolve freely and reciprocate freely upon the exterior of the tube; G, the governorstem, so attached to the sleeveF as to reciprocate with it, this stem being carried downward through the tube to make connection with the governor-valve or other means of regulation;

cylindrical cavity in the housing, oppositely disposed to the lever M at a point below its axis of oscillation; O, a push-pin axially arranged in this cavity and impinging with its end against the lever M; P, a spiral spring surrounding the push-pin, engaginga shoulder upon the pin and inclosed in the cavity N, so disposed as to urge the push-pin outward, and consequently, through the instrumentality of the levers,urge the governor-stem downward; Q, a hand-screw threaded into the rear of the cavity N, surrounding theheel of the push-pin, and serves as an adjustable abutment for the spiral spring; and R,the bearing in which the lever-shaft is supported.

` The springs J are so strained that their tend ency isto press the/balls inward, whereby they serve as the main centripetal agents. As

the balls fly outward under centrifugal influence they will move in a curved horizontal path, which may be generally described as an arc modied by a radius of changing length, the radius being represented by the flexing springs J, rigid at the lower ends.

The links I represent a radius of lesser length i than that corresponding with the arc described by the balls in their outward movement. The sleeve to which the lower ends of the links are pivoted, being free to rise and fall, nullifies the effect of the links in determining the IOO tremity of the shorter radius being free to ad 1o just itself with reference to the extremity of `ply may be so connected the longer radius.

The springs .I are narrowest at the balls, as indicated in Fig. 3. Ihe effect of. this practical weakening of the spring toward its free end is to concentrate most of the curvature at its eXtreme of iiexure at the upper portion of the spring, whereby under eXtreme iiexure the radius,77 if such it may be called, of the ballarc becomes greatly sh ortenedas the balls move outward; hence as the ball moves outward there is less coniiict betweenthe radius of the ball-arc and the radius of the links. By this means we secure a direct graduating governing action.-

While we set forth the springs J as iitted to serve as centripetal agents, and at the same time as practical links for controlling the are of ball travel, we do not confine ourselves to the structure in which the springs fulfill both oiices. Long links may take the place of the springs, and springs as centripetal agents simas to urge the balls inward. It will be noticed that as the balls move outward under increase of speed the sleeve and governing-stem move upward 5 hence the regulating-valve, or whatever device the stem is to actuate, must be arranged with this effect in View. If the stem is attached directly to a valve, the closing motion of the valve is to be an upward one.

The lever M, with its shaft and toe-lever, is

lthe usual arrangement of Speeder and sawyers cut-oli. The tendency of the spiral spring is to urge the governor-stem in a direction suited to increase the speed of the motor. The tension of the spring is adjusted by means of a hand-screw, Q, the recess N serving to inclose the spring, andthe position of the recess or easement of the spring is such as to be neatly and cheaply embodied in the housing and be free from liability to be clogged by dirt or be disturbed by accidental contact.

We claim as our invention- 1. In a governor, the combination of the governor-balls, the springs for urging the balls inward and determining their arc of travel, the links I, attached to the balls and having a length less than the radius corresponding to 'the arc of ball travel, and having their lower pivots free to rise and fall, anda reciprocating body connected to said pivots and adapted to transmit their rising and falling motion to a regulator, substantially as set forth.

2. In a governor, the combination of the governor-balls, the pivoted links, and the arccontrolling springs J, having a decrease of area at their upper ends, substantially as and for the purpose specified.

3. In a governor, the combination of the housing A, the governor-stem G, the levers K and M, the spiral spring P, and hand-screw Q, combined substantially as and for the purpose specified.

ROBERT W. GARDNER. JOHN W. GARDNER Witnesses:

GEO. A. SPENCER, ARTHUR E. SLACK.

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