US235481A - Jack-screw - Google Patents
Jack-screw Download PDFInfo
- Publication number
- US235481A US235481A US235481DA US235481A US 235481 A US235481 A US 235481A US 235481D A US235481D A US 235481DA US 235481 A US235481 A US 235481A
- Authority
- US
- United States
- Prior art keywords
- screw
- jack
- pawl
- ratchet
- williams
- 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
- 210000001699 lower leg Anatomy 0.000 description 4
- 230000000875 corresponding Effects 0.000 description 2
- 230000036633 rest Effects 0.000 description 2
- 230000000284 resting Effects 0.000 description 2
- 239000007787 solid Substances 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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/34—Locking or disabling mechanisms
- F16H63/3416—Parking lock mechanisms or brakes in the transmission
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D41/00—Freewheels or freewheel clutches
- F16D41/12—Freewheels or freewheel clutches with hinged pawl co-operating with teeth, cogs, or the like
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S254/00—Implements or apparatus for applying pushing or pulling force
- Y10S254/01—Jack bases
-
- 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
- Y10T74/2133—Pawls and ratchets
- Y10T74/2136—Pivoted pawls
Definitions
- This invention relates to that class of devices that are designed for lifting heavy bodies.
- the invention consists in a peculiarly-constructed pawl, made detachable and combined with a'bifurcated lever provided with side bolts, as hereinafter described.
- Figure 1 is a partly-sectional vertical elevation of the device.
- Fig.2 is a longitudinal elevation of the pawl.
- Fig. 3 is a cross-see tion of the ratchet, showing its attachment to the screw.
- A represents the base-block of the device, provided on its under side with pointed studs a a, to hold it in place, and provided,-also, with ahemispherical recess, b, for convenience of fitting the washer and pin 0 d respectively on the lower end'of the screw B, whereby th'e said screw B is held in an upright position.
- B is a square threaded screw, provided with a square shank, as shown at f, below the screwthreads, on which shank f is fitted the ratchet O; and immediately below the square portion f the screw-shank is round for a short space,
- D is a bifurcated rotatable lever-socket, provided with collars k k, encircling the screwB above and below the ratchet O, and provided (No model.)
- a detachable pawl, F that is hooked on a vertical bolt, m, and held against the ratchet O by a spring, E, which is secured on the handle D of the lever-socketD by a thumb-screw, E.
- This pawl F is provided with an inner concave surface, as shown at q, so that the teeth of the ratchet 0, working against said pawl F, will easilyrelease it, so that the spring E may press it into the interspaces between said ratchet-teeth and said pawl F is also provided with a curved slot, 1, by means of which it is engaged or hooked on the bolt m.
- Both sides of the lever D are provided with bolts m, so that, a reverse action of the jack-screw bein g required, the pawl F can be unhooked from one bolt on and hooked upon the other bolt m, and the said pawl F can at any time be removed altogether from the device to insure that the said jack-screw, when in operation, shall not be tampered with by unauthorized persons.
- cap G is a long cylindrical screw nut or cap, having a solid flat flanged head, the face of which is provided with pointed studs 0 o, for the better holding of said cap Gr against all objects resting on it.
- said cap G is screw-threaded, as shown at 1), in its lower portion, that it may move by the turning of the screw B.
- the interior of the upper portion of the cap G is made with a smooth bore, as shown at 8.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dowels (AREA)
Description
w; H. WILLIAMS.
Jack Screw. No. 235,481.
Patented Dec. 14,1880.
" BMW M M W. W W W w W W Mm mm WM ATTORNEYS.
NJHERS, PHOTO-LITHDGRAPRER, WAsmNGTqN, DXC.
UNITED STATES PATENT OFFICE.-
WILLIAM H. WILLIAMS, OF KEY WEST, FLORIDA.
JACK-SCREW.
SPECIFICATION forming part of Letters Patent No. 235,481, dated December 14, 1880.
Application filed October 1, 1880.
To all whom it may concern Be it known that I, WILLIAM H. WILLIAMS, of Key West, in the county of Monroe and State of Florida, have invented anew and Improved J ack-Screw, of which the following is a specification.
This invention relates to that class of devices that are designed for lifting heavy bodies.
The invention consists in a peculiarly-constructed pawl, made detachable and combined with a'bifurcated lever provided with side bolts, as hereinafter described.
Figure 1 is a partly-sectional vertical elevation of the device. Fig.2 is a longitudinal elevation of the pawl. Fig. 3 is a cross-see tion of the ratchet, showing its attachment to the screw.
Similar letters of reference indicate corresponding parts.
In the drawings, A represents the base-block of the device, provided on its under side with pointed studs a a, to hold it in place, and provided,-also, with ahemispherical recess, b, for convenience of fitting the washer and pin 0 d respectively on the lower end'of the screw B, whereby th'e said screw B is held in an upright position.
B is a square threaded screw, provided with a square shank, as shown at f, below the screwthreads, on which shank f is fitted the ratchet O; and immediately below the square portion f the screw-shank is round for a short space,
as shown at g, and then turned down to forui a spindle, h, that is inserted through the center of the base A, and has the washer c secured upon it by the pin d, as aforesaid. The shoulder i, formed by turning down the spindle h, rests on the top of the base A, and also serves to support the screw Bin an upright position. D is a bifurcated rotatable lever-socket, provided with collars k k, encircling the screwB above and below the ratchet O, and provided (No model.)
with a detachable pawl, F, that is hooked on a vertical bolt, m, and held against the ratchet O bya spring, E, which is secured on the handle D of the lever-socketD by a thumb-screw, E. This pawl F is provided with an inner concave surface, as shown at q, so that the teeth of the ratchet 0, working against said pawl F, will easilyrelease it, so that the spring E may press it into the interspaces between said ratchet-teeth and said pawl F is also provided with a curved slot, 1, by means of which it is engaged or hooked on the bolt m. Both sides of the lever D are provided with bolts m, so that, a reverse action of the jack-screw bein g required, the pawl F can be unhooked from one bolt on and hooked upon the other bolt m, and the said pawl F can at any time be removed altogether from the device to insure that the said jack-screw, when in operation, shall not be tampered with by unauthorized persons.
G is a long cylindrical screw nut or cap, having a solid flat flanged head, the face of which is provided with pointed studs 0 o, for the better holding of said cap Gr against all objects resting on it. Intcriorly said cap G is screw-threaded, as shown at 1), in its lower portion, that it may move by the turning of the screw B. The interior of the upper portion of the cap G is made with a smooth bore, as shown at 8.
Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- In a jack-screw, the combination, with the bifurcated lever D, provided with bolts m, of thedetachable slotted pawl F, substantially as and for the purpose described.
WILLIAM HENRY WILLIAMS.
Witnesses:
W. O. MALONEY, J r., HENRY WILLIAMS.
Publications (1)
Publication Number | Publication Date |
---|---|
US235481A true US235481A (en) | 1880-12-14 |
Family
ID=2304844
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US235481D Expired - Lifetime US235481A (en) | Jack-screw |
Country Status (1)
Country | Link |
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US (1) | US235481A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130325022A1 (en) * | 2012-05-30 | 2013-12-05 | Nick Wright | Laminoplasty System |
-
0
- US US235481D patent/US235481A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130325022A1 (en) * | 2012-05-30 | 2013-12-05 | Nick Wright | Laminoplasty System |
US10709482B2 (en) * | 2012-05-30 | 2020-07-14 | Globus Medical, Inc. | Laminoplasty system |
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