US164804A - Improvement in steam-engines - Google Patents
Improvement in steam-engines Download PDFInfo
- Publication number
- US164804A US164804A US164804DA US164804A US 164804 A US164804 A US 164804A US 164804D A US164804D A US 164804DA US 164804 A US164804 A US 164804A
- Authority
- US
- United States
- Prior art keywords
- steam
- valve
- engines
- improvement
- piston
- 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
- 210000000038 chest Anatomy 0.000 description 10
- 230000037250 Clearance Effects 0.000 description 4
- 230000035512 clearance Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000000576 supplementary Effects 0.000 description 4
- 230000001105 regulatory Effects 0.000 description 2
Images
Classifications
-
- 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
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/05—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B1/00—Percussion drilling
- E21B1/12—Percussion drilling with a reciprocating impulse member
- E21B1/24—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure
- E21B1/30—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure by air, steam or gas pressure
Definitions
- the object of my invention is to provide a steam-engine with a supplementary valve, moving in unison with the steam valve or valves, for passing a portion ot the exhaust steam from the exhaust side of the piston to the steam side just beforetlie completion of each stroke, to fill the side pipes,W passage, and clearance with exhaust steam, and thereby save that volume of live steam, and at the same time to reduce the compression at the termination of each stroke.
- the valve may be Worked by an arm on the stem of the slidevalve, if the engine be fitted with one, or by a separate eccentric.
- Figure 1 is a longitudinal vertical section of a steam-engine fitted with my improvement, showing the piston at mid-stroke.
- Fig. 2 is a similar view, but showing the piston nearly at the end of its stroke in the reverse direction.
- Fig. 3 is a sectional end elevation.
- A represents a steam-cylinder, having the usual steam-ports a a, and exhaust-port b.
- B isthe piston.
- C is the steamchest, tted with an ordinaryslide-valve, D.
- a cylindrical steain-chest, E fitted with a pistonvalve, F, whose stem G is connected by an arm, H, with the stem ofthe main valve D.
- two passages, c are cored in it, one leading to each end from a central port in the chest, each passage having its own port.
- a central belt, d is cored around the chest E.
- a pipe, e is tapped into the 'end of each passage c, and its other end into the side pipe or passage a of the steam-cylinder.
- One of the pipes c is provided With a cock, j'.
- the supplementary valve may be actua-ted by an independent eccentric.
Description
H. P. CASE.l l Steam-lingim.
N0, 164,804l Patentedjune 22,1875
YHE GRAPHIC COAPHOTO -LITH.39& 4-1 PARK PLACEJ'LY.
UNITED STaTEs PATENT QEEICE.
HIRAM P. OASE, OF DETROIT, MICHIGAN.
IMPRovEMi-:NT iN sTEAM-ENGiNEs.
Specification forming part of Letters Patent No. 164,804, dated June 22, 1875; application filed December 30, 1874.
To all whom it may concern Be it known that I, HIRAM P. CASE, Vof Detroit, in the county of Wayne and State of Michigan,l1ave invented an Improvement in Steam-Engines, of which the following is a specification The object of my invention is to provide a steam-engine with a supplementary valve, moving in unison with the steam valve or valves, for passing a portion ot the exhaust steam from the exhaust side of the piston to the steam side just beforetlie completion of each stroke, to fill the side pipes,W passage, and clearance with exhaust steam, and thereby save that volume of live steam, and at the same time to reduce the compression at the termination of each stroke. The valve may be Worked by an arm on the stem of the slidevalve, if the engine be fitted with one, or by a separate eccentric.
Figure 1 is a longitudinal vertical section of a steam-engine fitted with my improvement, showing the piston at mid-stroke. Fig. 2 is a similar view, but showing the piston nearly at the end of its stroke in the reverse direction. Fig. 3 is a sectional end elevation.
In the drawing, A represents a steam-cylinder, having the usual steam-ports a a, and exhaust-port b. B isthe piston. C is the steamchest, tted with an ordinaryslide-valve, D. Above the chest I bolt on the cap thereof a cylindrical steain-chest, E, fitted with a pistonvalve, F, whose stem G is connected by an arm, H, with the stem ofthe main valve D. Under the cylindrical bore of the chest E two passages, c, are cored in it, one leading to each end from a central port in the chest, each passage having its own port. To balance the valve F, a central belt, d, is cored around the chest E. A pipe, e, is tapped into the 'end of each passage c, and its other end into the side pipe or passage a of the steam-cylinder. One of the pipes c is provided With a cock, j'. During the time the pistonkis moving, .the val-ve F covers one of the ports c, as seen in Fig. 1, until just as the piston vis about to complete its stroke, when the valve F, moving with the main valve in a reverse direction to the piston, will uncover the ports c, (the main valve having covered both steam-ports a,) and a portion of the exhaust steam, or that Which is'on the exhaust side, Will pass through the pipe c into the chest E, through the port c, around the valve F, thence through the other passage c and pipe e into the steampassage a, filling it and the clearance With exhaust steam, saving an equal volume ot' live steam, and reducing the compression. At the end of the stroke the valve F will again cover the ports. The volume of steam so passing through the pipes may be regulated by the cock f.
On engines having other than sli|devalves. the supplementary valve may be actua-ted by an independent eccentric.
What I claim as my invention, and desire to secure by Letters Patent, is
The combination, with a steam-engine, of an Y independent valve and valve-chest and pipes, forJU transferring a portion of the exhaust steam to the steam side of the piston, at or near the completion of each stroke of the piston, substantially as described. .t
. HIB-AM P. CASE.
Witnesses:
H. S. SPRAGUE, H. F. EBERTs.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US164804A true US164804A (en) | 1875-06-22 |
Family
ID=2234213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US164804D Expired - Lifetime US164804A (en) | Improvement in steam-engines |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US164804A (en) |
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0
- US US164804D patent/US164804A/en not_active Expired - Lifetime
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