US275337A - Cut-off-valve gear - Google Patents
Cut-off-valve gear Download PDFInfo
- Publication number
- US275337A US275337A US275337DA US275337A US 275337 A US275337 A US 275337A US 275337D A US275337D A US 275337DA US 275337 A US275337 A US 275337A
- Authority
- US
- United States
- Prior art keywords
- cut
- valve
- valve gear
- weight
- rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000001276 controlling effect Effects 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
Images
Classifications
-
- 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
- F16H21/00—Gearings comprising primarily only links or levers, with or without slides
- F16H21/10—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane
- F16H21/16—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane for interconverting rotary motion and reciprocating motion
- F16H21/18—Crank gearings; Eccentric gearings
- F16H21/20—Crank gearings; Eccentric gearings with adjustment of throw
-
- 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
- Y10T74/16—Alternating-motion driven device with means during operation to adjust stroke
- Y10T74/1625—Stroke adjustable to zero and/or reversible in phasing
- Y10T74/1675—Crank pin drive, shiftable pin
Definitions
- This invention consists of the valve-rod connected to the crank-shaft, or any other shaft suitably geared therewith, so as to shift toward and from the center to lengthen and shorten the travel of the valve, and thereby vary the cut-off, the connection beingsuch that the centrifugal force of a weight will draw the rod toward the center as the speed of the engine increases, and thus shorten the cut-oil and diminish the supply and increase the expansion of the steam, and a spring will pull the pin outward again and increase the travel of the valve and admit more steam as the speed diminishes and the centrifugal force of the weight lessens, all as hereinafter fully described.
- Figure l is a side elevation of a steam-engine with an automatically-variable cut-off device of my invention.
- Fig. 2 is a detail of the same inside elevation and on .an enlarged scale, and
- Fig. 3 is a section of Fig. 2 on the line 00 w.
- valve-rod a is connected to a bar, I), arranged in a dovetail groove, c;crossing the center of a disk, d, attached to the crank-shaft,
- a weight, e is attached to the bar opposite to where the valve-rod is connected, so that the centrifugal force of the Weight will tend to draw.
- the valve-rod pin f toward the center, around which it revolves, and thus shorten the throw of the eccentric, and consequently the travel of the valve, whereby it will cut off shorter in proportion to the greater speed of the engine, thus controlling the motion of the engine and economizing the steam.
- a spring, 9, attached to the bar. so as to resist the action of the weight, and being adjustable as to its tension by a stop-bolt, h, may be set by said spring to graduate the action of the weight, as desired, and to pull the eccentric pin back to the starting-point when the engine is at rest.
- the disk may be arranged on acountershaft geared with the main shaft in any way.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valve Device For Special Equipments (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Description
(NmMod eL) J. M; ,HIGBB.
I GUT-OFPVALVB GEAR. No. 275,337. Patented WITNESSES Q INVBNTOR M ZWZ E ATTORNEYS.
n. PETERS. Pholo-liklwgnpher; Wznhinglnn. D a
UNITED STATES PATENT OFFICE.
JAMES M. HIGBE, OF MANSON, IOWA.
CUT-OFF-VALVE GEAR.
SPECIFICATION forming part of Letters Patent No. 275,337, dated April 3, 1883.
Application filed August 29, 1882. (Novmodeh) To all whom it may concern:
Be it known that I, JAMES M. HIGBE, of
Manson, in the county of Calhoun and State of Iowa, have invented a new and Improved Automatic Variable Gut-Oif-Valve Gear, of which the following is a full, clear, and exact description.
This invention consists of the valve-rod connected to the crank-shaft, or any other shaft suitably geared therewith, so as to shift toward and from the center to lengthen and shorten the travel of the valve, and thereby vary the cut-off, the connection beingsuch that the centrifugal force of a weight will draw the rod toward the center as the speed of the engine increases, and thus shorten the cut-oil and diminish the supply and increase the expansion of the steam, and a spring will pull the pin outward again and increase the travel of the valve and admit more steam as the speed diminishes and the centrifugal force of the weight lessens, all as hereinafter fully described.
Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of referenceindicate corresponding parts in all the figures.
Figure lis a side elevation of a steam-engine with an automatically-variable cut-off device of my invention. Fig. 2 is a detail of the same inside elevation and on .an enlarged scale, and Fig. 3 is a section of Fig. 2 on the line 00 w.
The valve-rod a is connected to a bar, I), arranged in a dovetail groove, c;crossing the center of a disk, d, attached to the crank-shaft,
and a weight, e, is attached to the bar opposite to where the valve-rod is connected, so that the centrifugal force of the Weight will tend to draw. the valve-rod pin f toward the center, around which it revolves, and thus shorten the throw of the eccentric, and consequently the travel of the valve, whereby it will cut off shorter in proportion to the greater speed of the engine, thus controlling the motion of the engine and economizing the steam. A spring, 9, attached to the bar. so as to resist the action of the weight, and being adjustable as to its tension by a stop-bolt, h, may be set by said spring to graduate the action of the weight, as desired, and to pull the eccentric pin back to the starting-point when the engine is at rest. When it is not convenient to locate the attachment so as to work on a disk attached to the end of the crankshaft, the disk may be arranged on acountershaft geared with the main shaft in any way.
Having thus fully described my invention, I claim as new and desire to secure by Letters Patent In an automatic cut-oh", the combination, with the valve-rod a, of the bar I), carrying weight 0 at one end, connected by a screw, h, with a spring, g, at the other, and arranged diametrically in the groove of a disk attached to the crank-shaft, as and for the purpose specified.
JAMES M. HIGBE.
Witnesses:
E. L. EBERSOLE, WM. SWANSON.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US275337A true US275337A (en) | 1883-04-03 |
Family
ID=2344565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US275337D Expired - Lifetime US275337A (en) | Cut-off-valve gear |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US275337A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4838374A (en) * | 1987-12-28 | 1989-06-13 | Eaton Corporation | Speed responsive rear wheel steering |
-
0
- US US275337D patent/US275337A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4838374A (en) * | 1987-12-28 | 1989-06-13 | Eaton Corporation | Speed responsive rear wheel steering |
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