US Patent: 662,011
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| Steam Engine Dash Pot
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Patentee:
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| Matthew Robert Moore (exact or similar names) - Indianapolis, IN |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jan. 19, 1900 |
| Granted: |
Nov. 20, 1900 |
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Joel Havens
"Vintage Machinery" entry for Atlas Engine Works
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Description: |
| Abstract:
My improved dash-pot may be used with steam of any pressure; but it should be al1owed to have a large diameter if intended to be used with steam of very moderate pressure, because the active force to effect the shutting motion of the valve is derived from the direct action of the steam on the movable part, usually termed a piston, therein. I will show such piston as packed but it will be understood that packing is not essential.
In what I esteem the most complete form of the invention I employ two dash-pots and links for each of the steam valves. In one I let the steam flow freely through a liberal opening in the axial line of the piston and make the piston of two widely-differing diameters, arranging it to play to the considerable distance required to shut the valve in a corresponding cylinder of two diameters. The area which is effective is the annular excess of the larger over the smaller diameter. When my invention is thus carried out, the pressure of the steam on that annulus contributes to close the valve.
I mount the cylinder and piston in close connection with the valve, using a rolling valve, and I connect to the valve at a point near its mid-length, by which I mean near the mid-length of its axis. The link between the valve and the piston allows a very easy connection and disconnection for examination or repairs. I provide for catching and retaining or leading harmlessly away the small quantities of water or oil, or both, which are liable to be thrown out by the active movements of the air.
Claims:
1. In a steam-engine the combination with a cylinder mounted on the steam-chest, of a trunk dash-piston working therein and having a longitudinal steam-aperture and operating a suitable valve substantially as set forth.
2. In a steam-engine, the combination of a piston of two diameters, having a longitudinal steam-aperture and working in a corresponding cylinder, A' A2 mounted on the steam-chest and provided with apertures a2, arranged to be covered and uncovered by the movements of the piston, the latter operating a suitable valve, substantially as set forth.
3. In a steam-engine, a rocking valve mounted on a fiat rocking shaft with liberty to leave its seat and having a. lateral arm at right angles to the plane of the shaft within the valve chest, in combination with a link pivoted to such arm and a connected piston subject to the steam-pressure operating through the link to turn the valve-arm in the direction to close the valve all arranged for joint operation substantially as herein specified.
4. In a steam-engine, a rocking valve having a lateral arm within the valve-chest, in combination with a link pivoted to such arm and a piston containing a longitudinal aperture directly communicating with the steam in the valve-chest said link transmitting motion between the valve and piston, substantially as set forth.
5. In a steam-engine, a rocking valve having a lateral arm within the valve-chest, in combination with a link, pivoted to such arm and a piston containing` a longitudinal aperture directly communicating with the steam in the valve-chest, said piston having a simple rolling contact with the link thus permitting ready detachment when required all substantially as set forth.
(S. In a steam-engine, a rocking valve having` a lateral arm within the valve-chest, in combination with a link pivoted to such arm, a piston of two diameters, having a longitudinal steam-aperture and working in a corresponding cylinder A' A2 provided with apertures a2, arranged to be covered and uncovered by the turning of the valve, substantially as set forth.
7. In a steam-engine, a rocking valve having a lateral arm within the valve-chest, in combination with a link pivoted to such arm and connected piston subject to the steam pressure operating through the link to turn the valve-arm in the direction to close the valve, such piston being of two diameters working in a corresponding cylinder A' A2 provided with apertures d2 arranged to be covered and uncovered by the turning of the valve and the link having a simple rolling contact with the piston thus being free to be easily detached from the piston when required all substantially as set forth.
8. In a steam-engine, a rocking valve having a lateral arm within the valve-chest, in combination with a link pivoted to such arm and connected piston subject to the steam pressure operating through the link to turn the valve-arm in the direction to close the valve, such piston being of two diameters working in a corresponding cylinder A' A2 provided with apertures d2 arranged to be covered and uncovered by the turning of the valve and with a lip AX adapted to arrest any water and oil ejected through such apertures, all substantially as set forth.
9. In a steam-engine, a rocking valve having a lateral arm within the Valve-chest, in combination with a link pivoted to such arm and a connected piston subject to the steam pressure operating through the link to turn the valve-arm in the direction to close the valve, such piston being of two diameters working in a corresponding cylinder A' A2 provided with apertures CL2 arranged to be covered and uncovered by the turning of the valve and with a lip AX and the pipe K adapted to arrest and lead away any Water and oil ejected through such apertures all combined and arranged to serve substantially as herein specified.
10. In a steam-engine, a rocking valve having a lateral arm within the valve-chest, in combination with a link pivoted to such arm and a connected piston subject to the steam pressure operating through the link to turn the valve-arm in the direction to close the valve and a second arm on the valve also within the valve-chest extending in the opposite direction from the first and having a connected link and piston arranged to contribute to turn the valve also into the closed position, the tendency of one piston being to crowd the valve upon its seat and of the other to balance such tendency by exerting a force tending to lift the valve off its seat, all combined and arranged for joint operation substantially as herein specified
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