US270546A - Drew j - Google Patents

Description

(No Model.)

H. O. HUNT.

GOVERNOR FOR STEAM ENGINES.

Patented Jan-.9,18'8.3.

isra'rns PATE T Orrrce.

HENRY c. HUNT, on NEWARK, NEW JERSEY, ASSIGNOR ro HIMSELF, AN- DREW J. HALSEY, or SAME PLACE, AND crnonas e. nonrneron, or

BROOKLYN, NE W YORK.

GOVERNORFOR STEAivl ENGlNES.

SPECIFICATION forming part of Letters Patent No. 270,546, dated January 9, 1883.

Application filed May 2, 1882. (X model.) i

To all whom it may concern:

Be it known that I, HENRY O. HUNT, a cili- Zen of the United States, residing at Newark, in thecountyotEsseX and State otNew Jersey, haveinvented certain new and useful Improvementsin Governors tor Steam-Engines; and I do hereby declare thet'ollowingto beat'ull,clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, ret

erence being had to the accompanying drawings, and to letters ot'referenee marked thereon, which form a part of this specification, in which- Figure 1 is a vertical transverse section of a governor embodying my improvements; Fig. 2, a horizontal section taken through that portion of the said governorindicated by line or, and Fig. 3 is a vertical longitudinal section ot' the governor-valve.

Similar letters ot'ret'erence indicate like parts in each of the figures.

In Fig. l, a is a bracket or support upon which the governor rests, and consists in a piece of-inetal cast or wrought to a convenient'size and form to adapt it to the particular pattern or style of engine to which it is to be applied.

b is a hollow sphere or shell, which may, for

convenience of manufacture, be separated into hemispheres and arranged and secured together. Said sphere contains the governing device.

To the base of the sphere bis rigidly attached a grooved pulley,f, or a suitable gearing, if preferred, by means ot which motion is imparted to the said governing device. Said pulley is preferably arranged upon said bracket, as shown, having a shaft or spindle, g, passing 4 downward through thebracket a, and secured therein by means of the nut h, screwed upon the end of said spindle, the nut, however, being not so rigidly screwed as to prevent a free rotation of the same.

4 5 cis a diaphragm rigidly secured to the sphere and subdivided into balla'eceptacles by suitable partitions.

e is a rod which connects the governing device with the governor-valve, and ordinarily passes directly from said device through the engine-casing, as shown in Fig. 1, and actuates the valve, as shown in Fig. 3. However, this may be changed as occasion requiresas, for instance, a lever may intervene between the governor and valve, which method is also illustrated by Fig. 1. In this last case the drawing shows the ends of a lever, j, split and working astride of a collared nut, 2', adapted to be screwed upon the rod (2, so that said lever may be adjusted in its relation to the governor-valve to increase or diminish the opening of the valves; The rod 6 passes through a central perforation in the diaphragm and connects witha disk, (I, which latter rests upon the balls A, of which there may be any desired number, according to the number of divisions in the sphere b, which divisions are formed by the partitionsl ot' the diaphragm, as shown more clearly in Fig. 2. Said partitions lofthe diaphragm maybe made separately, or all cast in one piece with said diaphragm, forming receptaclesfor the balls to ope ate in. The walls of the receptacles are preferably curved, which curves are larger than thoseot' theballs, so that the latter cannot touch more than one point of the diaphragm at a time. This construction renders the balls noiseless in their action in the said receptacles, as will be apparent. The track over which the balls travel from the point of bearingywhen the same are at rest, to the highest point near the circumference of the sphere is preferably straight. The partitions Zare curved from a perpendicular until they reach the sphere Z) and the abovementioned straight line, the curve, as before stated, being a little greater thanthe curve of the balls, as indicated in Fig. 2. The disk (I is preferably downwardly eoncavetL' By this construction, when the balls are brought to bear upon the disk and diaphragm the two 90. points of bearing are thrown largely out of line with the center of gravity of the ball, thus giving to each of said balls a leveragepower that it would not have if the points of bearing were directly opposite one another. The rod 0 is flattened or squared above the disk (I, and is made to slide in a corresponding orifice in the bar or partition I),- or it may be arranged in any other convenient manner to prevent its turning in the spindle g. 16

It is very evident that changes may be made in details of construction without departing from the spirit of my invention. Therefore I' do not wish to be understood as limiting myself to any positive statements madein the description, but only as broadly set forth in the claims.

The operation of the governoris as follows: The revolution of the sphere under the influen cc of the belt at and pulley f creates a centrifugal force which causes the balls to separate the disk (I and diaphragmc. The disk (I raises the valve-rod e, which latter engages with the valve, all aswill be understood.

In connection with the governor I use a double "alve, O, the object of which is to secure safety by automatically shutting off the steam and stopping the engine in case of accidental shifting or breaking of the governonbelt.

The peculiar construction of the valve consists in having compound or double valves 2) v, with their seats located between them, so that (when the lever is used) when the engine is in motion, it running too fast, the upper valve will be forced down upon its seat by the raising of the balls, and when at rest thelower valve would be raised to its seat by the dropping of the same, thus shutting off the steam in case of accidental disconnection of the belt. When the lever is not used, of course the actions last described will be reversed, in which case the engine will not start upon opening the throttle-valve, as the governor-valve is held closed by the action of the steam. As the balls must start before they will release the valve, I arrange a thumb-valve, t, which closes an opening in the partition P. \Vhen the engine is started this valve is opened, and the steam thus admitted to the cylinder through said opening causes the engine to start, and consequently give motion to the balls A, which latter hold the first-mentioned valves open during the subsequent operation of the machine, the thumb-valve t being closed after the machine is in full operation.

Having thus described my IHXGlltlOll, what I claim, and wish to secure by Letters Patent,

1. A steam-engine governor composed of a hollow sphere having therein independent balls working in suitable receptacles, one for each ball, said balls being arranged and adapted to raise the valve-rod, substantially as herein set forth.

2. In a steam-engine governor, a chamber adapted to rotate under the influence of the pulleyf, a diaphragm withi u said chamber, having ball-receptacles therein, a co-operating disk attached to the valverod, and balls arranged within said receptacles, the whole being arranged and combined substantially as herein set forth.

3. In a ball-governor for steam-engines, ballreceptacles with curved walls, the curves thereof being greater than the curves of the balls, substantially as and for the purposes set forth.

4. In a ballgovernor, the disk d, adapted to actuate the valve-rod influenced by the balls, substantially as herein set forth.

5. In a governor, the ballreceptacles and disk curved and adapted to throw the points of bearing of the balls, whilein motion, on a line outside their centers of gravity, substantially as shown and described.

6. The compound valve 12 0), having two seats, and the thumb-valve t, in combination with the governor, as herein set forth and shown.

' 7. In combination, the bracket a, pulleyf, working thereon, and carrying the rotating chamber 1), the diaphragm 0 within said chamher, the disk (I and valve-rod e, secured together, the balls A, and the governor-valve, all arranged and combined substantially as herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 20th day of March, 1882.

HENRY C. HUNT.

\Vitnesses:

OLIVER DRAKE, U. '1. \VrN'rERs.

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