US90643A - Improvement in steam-engine cut-offs - Google Patents

Improvement in steam-engine cut-offs Download PDF

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Publication number
US90643A
US90643A US90643DA US90643A US 90643 A US90643 A US 90643A US 90643D A US90643D A US 90643DA US 90643 A US90643 A US 90643A
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Prior art keywords
steam
improvement
offs
engine cut
yoke
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H53/00—Cams ; Non-rotary cams; or cam-followers, e.g. rollers for gearing mechanisms
    • F16H53/02—Single-track cams for single-revolution cycles; Camshafts with such cams
    • F16H53/04—Adjustable cams
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams
    • Y10T74/2102—Adjustable

Definitions

  • my invention consists in the construction and arrangement of' parts, hereinafter fully described, for operating the valves of' steam-engines, which may be so adjustedas to admit any desired quantity of steam to the cylinder, ,at the will of the attendant.
  • Figure l is an end view ofthe ange D of' the sleeve B, showing the steel toe G, attached thereto.
  • FigureZ is an elevation of"""the sleeve B, with its anges D and C, and driving-shaft A.
  • v Figure 3 is a view of' the fiange C of the sleeveY B, showing the end of the movable toe H.
  • Figure 4 shows a device for operating the cam I, by means of a governor.
  • Figure 5 shows the movable toe H.
  • Figure 6 is a side view of the yoke E.
  • Figure 7 is a side elevation of the improvement as it would appear whenl put together.
  • Figure 8 is a side view of the-yoke F.
  • Figure 9 is a view of the camI.: y
  • Figure 10 shows the device for operating the cam I by band.
  • the driving-shaft A as shown in gs. 2 and 7, is
  • the toe H has a shank forged upon it, the end of which rests in the fiange D.
  • the yokes E and F are made of steel, and are placed in a vertical position, the shaft A passing through them, as shown in fig. 7.
  • the yoke E is attached to the exhaust-valve, and the yoke F to the inlet-valve.
  • the exhaust-valve When the engine is in motion, the exhaust-valve is raised and dropped by means of the toe G, on the fiange D, coming in contact with that part of the yoke E marked a b, and it is kept open as long as it is in contact with said surface.
  • the inlet-valve is raised by means of' the movable toe H coming in contact with that part of' the yoke F marked c d, and the time it is kept open depends on the position of the cam I, said cam being loose on the shaft A, and is actuated by means of the lever J, as shown in fig. 10, or by means of the segment-gear and rack K, as shown in iig. 4, which maybe attached to and actuated by a governor.
  • the motion of the engine can also be reversed at tne will of the operator, or it can be made automatic by means of the governor.
  • the yokes E and F when constructed substantially as shown and described.
  • cam I and lever J when constructed and arranged to operate as shown and described.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Polymerisation Methods In General (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Description

dilated '5ta-tra SAMUEL DUNBAR, or ANEW YORK, N. Y.
Letters Patent No. 90,643, dated .Tune 1, 18.69.
IMPROVEMENT IN STEAM-ENGINE CUT-CPFS.
The Schedule referred to in these Letten Patent end making part of the saine.
To all whom it may concern:
Be it known that I, SAMUEL DUNBAR, of' New York, in the 'county of New York, and State oi New York, have invented a new and useful ValveGear for Steam-Engines; and I do hereby declare that the following is a full, clear, and exact description thereof', reference being had to the accompanying drawings, making part of this specification, and to the letters of reference marked thereon.
The nature of my invention consists in the construction and arrangement of' parts, hereinafter fully described, for operating the valves of' steam-engines, which may be so adjustedas to admit any desired quantity of steam to the cylinder, ,at the will of the attendant.
To enable those skilled in the art to which my in-v vention appertains, to make and use the same, I will proceed to describe its construction and operation.4
In the drawings- Figure l is an end view ofthe ange D of' the sleeve B, showing the steel toe G, attached thereto.
FigureZ is an elevation of"""the sleeve B, with its anges D and C, and driving-shaft A.
v Figure 3 is a view of' the fiange C of the sleeveY B, showing the end of the movable toe H.
Figure 4 shows a device for operating the cam I, by means of a governor.
Figure 5 shows the movable toe H.
Figure 6 is a side view of the yoke E.
Figure 7 is a side elevation of the improvement as it would appear whenl put together.
Figure 8 is a side view of the-yoke F.
Figure 9 is a view of the camI.: y
Figure 10 shows the device for operating the cam I by band. r
- The driving-shaft A, as shown in gs. 2 and 7, is
the engine.
On the shaft A, I secure the sleeve B, with its fanges D and C, and on the flange D, I 'secure the steel toe G, by means of a screw, or otherwise, as
. shown in fig. 1.
In the auge C, I make a cavity, suciently deep to receive, flush with its face, the steel t-oe H, aslshown in gs. 2 and 3.
The toe H has a shank forged upon it, the end of which rests in the fiange D.
On this shank I place a spiral spring, as shown in iig. 7, the eiect of which is to keep the toe Hin contact with the face or" the cam I, which is placed on the shaft A.
The yokes E and F are made of steel, and are placed in a vertical position, the shaft A passing through them, as shown in fig. 7. The yoke E is attached to the exhaust-valve, and the yoke F to the inlet-valve.
When the engine is in motion, the exhaust-valve is raised and dropped by means of the toe G, on the fiange D, coming in contact with that part of the yoke E marked a b, and it is kept open as long as it is in contact with said surface.
The inlet-valve is raised by means of' the movable toe H coming in contact with that part of' the yoke F marked c d, and the time it is kept open depends on the position of the cam I, said cam being loose on the shaft A, and is actuated by means of the lever J, as shown in fig. 10, or by means of the segment-gear and rack K, as shown in iig. 4, which maybe attached to and actuated by a governor.
The advantage of my improvement is, that it may I be entirely under the control of' the attendant, who
may, at his option, canse the steam to follow the entire length of the stroke, or to cut it off at any desired point. The motion of the engine can also be reversed at tne will of the operator, or it can be made automatic by means of the governor.
Having thus described my invention,
What I claim as new, and desire to securehby Letters Patent, is-
1. The yokes E and F, when constructed substantially as shown and described.
2. The combination of the yokes E and F with the toes G and H, when constructed substantially as shown and described.
3. The cam I and yoke F, when constructed as shown and described.
4. The cam I and lever J, when constructed and arranged to operate as shown and described.
SAML. DUNBAR.
Witnesses:
E. R. BROWN,
G. A. G. SMITH.
US90643D Improvement in steam-engine cut-offs Expired - Lifetime US90643A (en)

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