US110835A - Improvement in steam-engine valves - Google Patents

Improvement in steam-engine valves Download PDF

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US110835A
US110835A US110835DA US110835A US 110835 A US110835 A US 110835A US 110835D A US110835D A US 110835DA US 110835 A US110835 A US 110835A
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steam
improvement
engine valves
valve
piston
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F15B11/15—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor with special provision for automatic return
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid

Definitions

  • My improvement consists in an impro ved method of cushioning pistons of steam-engines, especially applicable to the valve-pistons of direct-acting engines.
  • Figure 1 is a section of a directacting engine having my improved arrangement for cushioning the valve-piston A.
  • Fig. 2 is an enlarged detail section of the cushioning device.
  • valve B is a small slide-valve operating the valvepiston A by means of ports c d.
  • This valvepiston A has arranged in each end a puppetvalve, g, which operates to cushion the valvepiston by closing the port c or the port d, when exhausting from their respective ends, at the same time leaving the ports c and d free for the induction of steam by removing the puppet g from its seat.
  • valve-piston closes the exhaustport by means of the puppet g, and the piston is arrested, although any pressure of steam in the port caused by the reversing of the slidevalve B removes the puppet g from its seat, and leaves the port open for the induction of steam to the end of the valve-piston.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Turbines (AREA)

Description

UNITED STATESPA'I'ENT CEEIGE.
CHARLES I). DEANE, OF SPRINGFIELD, MASSACHUSETTS.
IMPROVEMENT IN STEAM-ENGINE VALVES.
I Specification forming part of Letters Patent No. 110,835, dated January 10, 1871.
I, CHARLES P. DEANE, of Springfield, county of Hampden, Commonwealth of Massachusetts, have invented a new and useful Improvement in Steam-Engines, of which the following is a specication:
My improvement consists in an impro ved method of cushioning pistons of steam-engines, especially applicable to the valve-pistons of direct-acting engines.
In the drawing, Figure 1 is a section of a directacting engine having my improved arrangement for cushioning the valve-piston A. Fig. 2 is an enlarged detail section of the cushioning device.
I will now describe my improvement.
B is a small slide-valve operating the valvepiston A by means of ports c d. This valvepiston A has arranged in each end a puppetvalve, g, which operates to cushion the valvepiston by closing the port c or the port d, when exhausting from their respective ends, at the same time leaving the ports c and d free for the induction of steam by removing the puppet g from its seat.
By this means I accomplish a perfect cushion, for the valve-piston closes the exhaustport by means of the puppet g, and the piston is arrested, although any pressure of steam in the port caused by the reversing of the slidevalve B removes the puppet g from its seat, and leaves the port open for the induction of steam to the end of the valve-piston.
I claim- The arrangement of thc puppet-valves upon the valve-piston A, and their operation in connection with it and with the ports c and 61,'
substantially as specied.
CHARLES P. DEANE.
Witnesses:
J. B. GARDINER, D. M. WELLS.
US110835D Improvement in steam-engine valves Expired - Lifetime US110835A (en)

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