US215369A - Improvement in cut-offs for steam-engines - Google Patents
Improvement in cut-offs for steam-engines Download PDFInfo
- Publication number
- US215369A US215369A US215369DA US215369A US 215369 A US215369 A US 215369A US 215369D A US215369D A US 215369DA US 215369 A US215369 A US 215369A
- Authority
- US
- United States
- Prior art keywords
- steam
- cut
- slide
- engines
- shaft
- 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
- 210000003371 Toes Anatomy 0.000 description 8
- 230000000875 corresponding Effects 0.000 description 4
- 241000212977 Andira Species 0.000 description 2
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N N,N'-Methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 description 2
- 101710036978 NCKAP1 Proteins 0.000 description 2
- 210000000038 chest Anatomy 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000001105 regulatory Effects 0.000 description 2
- 230000002441 reversible Effects 0.000 description 2
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G25/00—Conveyors comprising a cyclically-moving, e.g. reciprocating, carrier or impeller which is disengaged from the load during the return part of its movement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
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- 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
- Y10T74/1683—Cam and follower drive
-
- 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
- Y10T74/18—Mechanical movements
- Y10T74/18056—Rotary to or from reciprocating or oscillating
- Y10T74/18296—Cam and slide
-
- 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
- Y10T74/2107—Follower
Definitions
- the object of our invention is to construct a cut-off by which the valve may be caused to close the live-steam port at one-third, half, or two-thirds of the stroke, while the exhaustport remains open to the end of the stroke.
- Figure 1 is a sectional plan view of a steamengine valve and its operating mechanism constructed in accordance with our invention.
- Fig. 2 is a side View of the same.
- Fig. 3 is a cross-section of the crank-shaft and sleeve that carries the cams.
- the bed-plate of an engine is represented at a, 0 being the crank-shaft in bearings c; d, the valve chest and seat, and e the valve, which is of ordinary construction.
- valvestem f is connected to a plate or slide, 9, that is apertured at k for the passage of shaft b, and fitted to slide in ways It to move the valve 0, as hereinafter described.
- Upon the shaft 1) is a loose sleeve, 2 one end of which is in the aperture is of the slide 9, and carries the cams l m a. Any one of these cams may be brought in line with slide 9 by moving lever o, the forked end of which engages with an annular groove, 0;, in sleeve i, so that the sleeve will slide on shaft I) as the lever is moved.
- Upon shaft b is a pin, 12, which projects through a slot, q, in sleeve i, and serves as the means for turning the sleeve with the shaft.
- the slot q is long enough to permit shifting of the cams.
- the slide g is moved by contact of the cams with the sides of opening k, and the contactsurfaces of the slide are covered by plates r, which may be adjusted on screws 8, to compensate for wear.
- Each cam is formed with a toe, t, of corresponding shape and length, that acts at the end of the stroke to close one exhaust and open the other, and at the same time to admit steam to the cylinder.
- the steam is cut off by the portion a u of I the cam, and the point at which the steam is cut off depends upon the size of the points a, which varies with each cam.
- the toe t is free from any contact with the slide when the portion a is acting, and it will be seen that the point of cutting off is regulated by the enlargement to of the cam.
- the steam will act expansively to the end of the stroke, and the steam can be used to greater advantage than heretofore.
- a rotary shaft having the pin 19, and a sleeve having the slot q, all arranged to operate as and for the purpose described.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Description
P. A. & I. S. 'K NAPP. Out-Off.f0r Steam-Engine.
No. 215.369. Patented Maiy13, 1879.
ATTQBNEYS.
N.PETERS. FHOTO-LITHOGRAPHE-R, WASNXNGTON. D. C
UNITED STATES PATENT OFFICE.
PHILO A. KNAPP AND IRA S. KNAPP, OF DANBURY, CONNECTICUT.
IMPROVEMENT IN CUT-O FFS FOR STEAM-ENGINES.
Specification forming part of Letters Patent No. 215,369, dated May 13, 1879; application filed January 8, 1879.
To all whom it may concern:
Be it known that we, PHILO A. KNAPP and IRA S. KNAPP, of Danbury, in the county of Fairlield and State of Connecticut, have invented a new and Improved Cut-Off for Steam- Engines, of which the following is a specification.
The object of our invention is to construct a cut-off by which the valve may be caused to close the live-steam port at one-third, half, or two-thirds of the stroke, while the exhaustport remains open to the end of the stroke.
Referring to the accompanying drawings, Figure 1 is a sectional plan view of a steamengine valve and its operating mechanism constructed in accordance with our invention. Fig. 2 is a side View of the same. Fig. 3 is a cross-section of the crank-shaft and sleeve that carries the cams.
Similar letters of "reference indicate corresponding parts.
The bed-plate of an engine is represented at a, 0 being the crank-shaft in bearings c; d, the valve chest and seat, and e the valve, which is of ordinary construction.
The valvestem f is connected to a plate or slide, 9, that is apertured at k for the passage of shaft b, and fitted to slide in ways It to move the valve 0, as hereinafter described.
Upon the shaft 1) is a loose sleeve, 2 one end of which is in the aperture is of the slide 9, and carries the cams l m a. Any one of these cams may be brought in line with slide 9 by moving lever o, the forked end of which engages with an annular groove, 0;, in sleeve i, so that the sleeve will slide on shaft I) as the lever is moved.
Upon shaft b is a pin, 12, which projects through a slot, q, in sleeve i, and serves as the means for turning the sleeve with the shaft. The slot q is long enough to permit shifting of the cams.
The slide g is moved by contact of the cams with the sides of opening k, and the contactsurfaces of the slide are covered by plates r, which may be adjusted on screws 8, to compensate for wear.
Each cam is formed with a toe, t, of corresponding shape and length, that acts at the end of the stroke to close one exhaust and open the other, and at the same time to admit steam to the cylinder.
The steam is cut off by the portion a u of I the cam, and the point at which the steam is cut off depends upon the size of the points a, which varies with each cam.
Referring to Fig. 2, let it be supposed that shaft b is turning in the direction of the arrow and the cams set for cutting off at halfstroke. When the crank reaches the deadpoint the toe t will have moved slide 9, and the valve 0 will be as shown at A-the exhaust open and the steam entering the cylinder. At half-stroke the portion a of the cam will move the slide and cut off the steam, but will not move the valve far enough to close the exhaust previously opened. This position is represented at B. When the opposite end of the stroke is reached the toe twill act upon the slide {1 again, and the valve 0 be shifted to the position as at C, which is the reverse of A.
The toe t is free from any contact with the slide when the portion a is acting, and it will be seen that the point of cutting off is regulated by the enlargement to of the cam.
There are two enlargements a, which permit the same action when theengine is reversed. In such reversal of the motion the pin 1), that moves cam-sleeve 'i, shifts to the other side of slot q before any motion of the cam takes place, thereby bringing the parts to the proper relative position.
By the abovedescribed cut-off mechanism.
the steam will act expansively to the end of the stroke, and the steam can be used to greater advantage than heretofore.
We are aware that it is not new to use a sliding sleeve, a yoke-slide, a cut-01f cam, or adjustable wearing-plates; but
What we do claim as new and of our invention is- 1. The combination of a cut-off cam, of the shape shown, and arranged in a yoke-slide, g,
a rotary shaft having the pin 19, and a sleeve having the slot q, all arranged to operate as and for the purpose described.
2. The unequal cams l m a, made of the form described, attached to a slotted sliding sleevc,i q, and adjustable on a shaft having pin p with respect to the slide g, as and for the purpose specified.
PHILO A. KNAPP. IRA s. KNAlPP.
Publications (1)
Publication Number | Publication Date |
---|---|
US215369A true US215369A (en) | 1879-05-13 |
Family
ID=2284772
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US215369D Expired - Lifetime US215369A (en) | Improvement in cut-offs for steam-engines |
Country Status (1)
Country | Link |
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US (1) | US215369A (en) |
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0
- US US215369D patent/US215369A/en not_active Expired - Lifetime
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