US185970A - Improvement in lever pawl and ratchet for operating wagon-brakes - Google Patents
Improvement in lever pawl and ratchet for operating wagon-brakes Download PDFInfo
- Publication number
- US185970A US185970A US185970DA US185970A US 185970 A US185970 A US 185970A US 185970D A US185970D A US 185970DA US 185970 A US185970 A US 185970A
- Authority
- US
- United States
- Prior art keywords
- ratchet
- improvement
- lever
- brakes
- pawl
- 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
- 238000010276 construction Methods 0.000 description 4
- 238000007011 Robinson annulation reaction Methods 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
Images
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
- G05G5/00—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member
- G05G5/12—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member for holding members in an indefinite number of positions, e.g. by a toothed quadrant
- G05G5/14—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member for holding members in an indefinite number of positions, e.g. by a toothed quadrant by locking a member with respect to a fixed quadrant, rod, or the like
- G05G5/18—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member for holding members in an indefinite number of positions, e.g. by a toothed quadrant by locking a member with respect to a fixed quadrant, rod, or the like by positive interengagement, e.g. by a pawl
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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
- Y10T74/20—Control lever and linkage systems
- Y10T74/20576—Elements
- Y10T74/20636—Detents
- Y10T74/20672—Lever engaging rack
- Y10T74/2069—Handle release
Definitions
- Figure l is a side view of my improved device, part being broken away to show the construction.
- Fig. 2 is a front view of the same.
- the invention relates to an improvement in that class of devices for operating wagonbrakes in which a two-part jointed lever is employed.
- the invention relates to the construction and arrangement of parts, as hereinafter described and claimed.
- A indicates a curved ratchet-bar attached to the side of a wagon-body, B, and D O the two parts of the brake-lever, which are pivoted together at a point above the ratchet-bar.
- the upper end of part O of said lever is forked as shown, Fig. 2, the respective arms of the fork being parallel and of such length that they project above the ratchet-bar sufficiently to permit the pivoted attachment of the brake-strap G, the T-shaped pawl E, and the handle part D, of the lever.
- the lower end of part D has a shoulder and finger, b.
- a cross-pin, a engages the shoulder when pressure is applied to part D to throw the brake-lever forward; but when pressure is applied in the opposite direction the finger b engages the arm at of pawl E, overcomes the stress of spring E, and throws the latter out of engagement with the teeth of the ratchet-bar.
- Such backward movement is, however, arrested by contact of the finger b with the pivot of strap G.
- the vibratory movement of part D is therefore limited by dle portion of the lever will act upon the pawl to release it from engagement with the teeth of.a ratchet bar; but
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Push-Button Switches (AREA)
- Percussion Or Vibration Massage (AREA)
Description
J. R. ROBINSON.
LEVER, PAWL, AND RATCHET FOR OPERATING WAGON-BRAKES, &
Patented Jan. 2, '1877.
ATTORNEYS.
WITNESSES N. PETERS. PHOTO-UTHOGRAPHER, WASHINGTON D C.
UNITED STATES PATENT OFFICE.
JAMES R. ROBINSON, OF SHAWNEE MOUND, MISSOURI.
IMPROVEMENT IN LEVER PAWL AND RATCHET FOR OPERATING WAGON-BRAKES. &c.
Specification forming part of Letters Patent No. 185,970, dated January 2, 1877; application filed August 21, 1876.
To all whom it may concern Be it known that 1, JAMES RANDOLPH ROB- INSON, ofShawnee Mound,in the county of Henry and State of Missouri, have invented a new and useful Improvement in .Lever and (latch, of which the following is a specification:
Figure l is a side view of my improved device, part being broken away to show the construction. Fig. 2 is a front view of the same.
Similar letters of reference indicate corresponding parts.
The invention relates to an improvement in that class of devices for operating wagonbrakes in which a two-part jointed lever is employed. The invention relates to the construction and arrangement of parts, as hereinafter described and claimed.
In the drawing, A indicates a curved ratchet-bar attached to the side of a wagon-body, B, and D O the two parts of the brake-lever, which are pivoted together at a point above the ratchet-bar. The upper end of part O of said lever is forked as shown, Fig. 2, the respective arms of the fork being parallel and of such length that they project above the ratchet-bar sufficiently to permit the pivoted attachment of the brake-strap G, the T-shaped pawl E, and the handle part D, of the lever. The lower end of part D has a shoulder and finger, b. A cross-pin, a, engages the shoulder when pressure is applied to part D to throw the brake-lever forward; but when pressure is applied in the opposite direction the finger b engages the arm at of pawl E, overcomes the stress of spring E, and throws the latter out of engagement with the teeth of the ratchet-bar. Such backward movement is, however, arrested by contact of the finger b with the pivot of strap G. The vibratory movement of part D is therefore limited by dle portion of the lever will act upon the pawl to release it from engagement with the teeth of.a ratchet bar; but
What I claim 1s-- The combination, with the ratchet-bar, of the lever composed of the forked portion 0, the handle portion I), pivoted thereto, and constructed with a shoulder and finger, as described, the T-shaped spring-pawl E, and the brake-strap Gr, pivoted at e, as shown and de scribed, to operate as specified.
JAMES RANDOLPH ROBINSON.
Witnesses:
H. J. RUTHRAUFF, J. H. HALE.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US185970A true US185970A (en) | 1877-01-02 |
Family
ID=2255377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US185970D Expired - Lifetime US185970A (en) | Improvement in lever pawl and ratchet for operating wagon-brakes |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US185970A (en) |
-
0
- US US185970D patent/US185970A/en not_active Expired - Lifetime
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