US1733844A - Speed and pressure governor - Google Patents

Description

Oct. 29, 1929. c. WAINWRIGHTII' 1,733,844

SPEED AND PRESSURE GOVERNOR Filed July 29, 1924 2 Sheets-Sheet 1 Oct. 29, 1929. c. WAINWRIGHT SPEED AND PRESSURE GOVERNOR 2 Sheets-Sheet Filed July 29, 1924 for/7e Patented Oct. 29, 1929 CHARLES 'WAINWBIGHT, OF EENNSYLVAIIIA SPEED AND PRESSURE GOVERNOR Application filed July 29,

One object of my said invention is the provision of a steam driven compressor in which the thermal working conditions are improved and a high ratio of expansion and maximum efiiciency are attained.

Another object is the provision of a steam driven compressor embodying improved and highly efficient automatic governing means.

Another object is the provision of a steam 1o driven compressor of general high eficiency.

Another object is the provision of a steam cylinder of high eficiency characterized by a steam valve that is automatically always tight, by means whereby an extremely short cut off can be brought about without condensation due to highly efficient insulating means, by compression valves that aflord constant compression irrespective of the point of cut off and by automatic means of high efficiency for controlling the cut off.

Other objects and practical advantages of the invention will be understood from the following description and claims when the same are read in connection wth the drawings, ac-

i companying and forming part of this specification, inwhich Figure l is a side elevation showing a steam driven compressor constituting one embodiment of my invention.

Figure 2 is an enlarged view, partly in elevation and partly in section, illustrating the preferred type of governor employed in the compressor.

Figure 3 is a vertical section of the governor at right angles to Figure 4.

Figure 4 is an enlarged detail view of the connections to the safety valve 30.

Similar numerals designate corresponding 3 parts throughout the several views.

The engine to which my invention is shown applied includes the usual steam cylinder 1 which contains the usual piston whose operation is controlled by a steam valve.

The valve gear of the engine includes a I block 21 in a link 22, and a connection between the said block 21 and the steam valve comprises a rod 23, Figures 1 and 2. The rod 28 is connected in turn, by a rod 24: with the vertically swinging arm 25 of my novel-governor which is of the fly ball type as clearly 1924. Serial No. 728,928. M

shown in Figures 1, 2 and By reference to said figures it will be understood that when the governor is in operation the arm 25 is raised and lowered by centrifugal action, the said raising and lowering of the arm 25 being attended by raising and lowering of the link block 21 which determines the cut off of the steam valve. In addition to the elements referred to, the governor comprises a piston 26 connected by a link 27 with the arm 25, the said piston 26 being disposed in a cylinder 28 to which is connected a pipe 29 for the control of the piston by the air pressure of the compressor 3O which is arranged in tandem, with the cylinder. as shown in Figure 1. 05 From this it follows that when a predetermined air pressure is reached, said pressure will operate against the piston 26 to raise the arm 25 and thereby raise the link block 21 W, and slow down the compressor. As the pressure'builds u the arm 25 will be raised by the raisingo the piston 26and the speed of the apparatus will be proportionately decreased. At 30 the governor is equipped with a safety valve, Figures 2 and-3, so constructed and arranged that in the event the driving connection, preferably belt or chain 50, of the governor is broken, live steam pressure will be utilized to raise the piston 26 and the m link block 21 and thereby slowdown the apso 'paratus. In this connection it will be apparent that the safety valve 30 is provided with a conduit '30 for the supply of steam thereto, and that the belt or chain 50 is con-' 'nected with the safety valve in the manner" as best shown in Figure 4; also, that the valve 30 depends on the governor, said valve being connected tothe steam line of the compressor and being closed when in its horizontal posia" tion. Should the belt 50 part the valve 30 be-co cause-of the gravitation of its weight 3O will be operated so as to permit steam to pass to pipe 29 when the steam pressure will cause the piston 26 to move upward and the gover- A nor to slowdown and stop the compressor. In this connection it will be noted that the belt 50 when normally operating has one of its stretches in engagement with a. gravitational lever 30 connected with the weighted. portion of the valve 80 as shown in F igures 4 and 5, and that gravitation of said lever 30 will be attended by release and gravitation of the said weighted portion of the valve.

The lever 30 is equipped with wheels 30 5 above and below the rubber stretch of the belt 50, and hence said lever will be maintained in the posit-ion shown in Figure 4, so long as the belt 50 is intact, but'when the belt breaks the lever 30 will gravitatei. ei,

o'swing downwardly and disengage its flange 30 from the lateralupper portion of the arm 30 on the weighted portion of valve 30, thereby permitting downward movement of said weighted portion to establish the supply of V steam to the pipe 29 and cylinder 28 and bring about stoppage of the compressor.

The steam inlet and the main exhaust for steam are designated by legends in Figure 2,

and by comparison of Figures 2, 3 and 7 it will be understood'that steam passes from the inlet about the piston cylinder and past the steam valveto the interior-ofcthe cylinder, and from the cylinder the exhaust steam is carried past the steam valve to the chambers in the head (see upper arrowat right of Figure 3) and from said chambers the exhaust steam passes out through the main exhaust designated in Figure 2. 7

Having described my inventlon, what I claim and deslre to secure by Letters-Patent,

1. In combination, a centrifugal governor, drlving means therefor 1nclud1ng. a steam engine and a belt, an arm connected with the v governor, a piston connected with said arm,

a valve gearincluding a block connected with a steam valve complementary to said engine, v

3. In combination, a governor, driving means therefor including a steam engme and a dr1v1ng connectlon, a steam valve complementary to the engine and connected with and controlled by the governor, a-piston con,- nected with the governor, a cylinder containing said piston, a normally-closed valve adapted to be c'onnected-withsaid cylinder 'and'a source of steam supply, and means operable by mishap to the. driving connection to the governor for ;opening said valve 1 and supplying steam to said cylinder.

In testimony whereof I aflix my signature.

CHARLES WAINWRIGHT;

stretch of the belt and also having a flange a normally supporting said rod and movable by gravitation of the lever out of engagement with the rod.

2. In combination, a centrifugal governor, driving means thereforincluding a steam engine and a belt',an arm connected with the governor, a piston connected with said arm,

a steam valve complementary to said engine, a valve gear including a block connectedwith said steam valve and also connected with sa1d arm, a cylinder containing said piston, a

normally-closed valve ada'ptedfto be connected with a source of steam supply and said cylinder, gravitational means normally held by the belt again st downward movement, and means for bringing about opening of the valve on downward movement of saidgravitational means following breakage, of the 65 belt-I V

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