US269661A - Lifting-jack - Google Patents
Lifting-jack Download PDFInfo
- Publication number
- US269661A US269661A US269661DA US269661A US 269661 A US269661 A US 269661A US 269661D A US269661D A US 269661DA US 269661 A US269661 A US 269661A
- Authority
- US
- United States
- Prior art keywords
- jack
- lifting
- heads
- head
- screws
- 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
- 210000002105 Tongue Anatomy 0.000 description 12
- 238000010276 construction Methods 0.000 description 10
- 210000002832 Shoulder Anatomy 0.000 description 6
- 230000001747 exhibiting Effects 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F13/00—Common constructional features or accessories
Definitions
- My invention relates to lifting-jacks, its object being to provide therefor a movable head or heads of such construction that the jack will .be enabled to adapt and adjust itself to bearing-surfaces not parallel; to which end it consists in the combination, with the liftingjack, of a movable and selt adjustable head or heads of peculiar construction, which afiord. a secure adj ustablo bearing for the jack and enable it to act effieiently and without undue strains between surfaces not parallel.
- My invention is embodied in the mechanism illustrated in the accompanying drawings, exhibiting a jack having right and left hand screws connected and operated in the same axial line by a swivel, by whose rotation the screws are forced apart.
- Figure l is a vertical elevation of my improved jack complete.
- Figs. 2 and 3 are detached side and end views ofthe adjustable head detached; and
- Figs. 4 and 5 are side and end elevations of one of the screws detached from the swivel.
- the swiveling yoke A, right and left hand screws 1) 1), arranged in the same axial line through the end walls of the yoke A, with which the screws engage, and the adjustable heads B B at the outer ends of the screws, constitute thejack to which my improvement is applied.
- the construction of the yoke and screws is obvious and requires no description.
- To receive the adjustable heads the screws are formed at their outer ends into tongues c c, flanked on opposite sides by similar semi-cylindrical shoulders, (Z d, as shown in Figs. 4 and 5, which constitute the bearing abntments of the screws in and against their adjustable heads.
- the heads B B are concave on the under side, as shown in Fig.
- a lilting-jack having its lifting bar or bars terminated by convex bearing-shoulders and a central tongue adapted to engage with and bear upon a correspondiugly-formed head having concave bearing-shoulders and a central slot, substantially as and for the purpose specified.
- the lifting-bars D terminating in bearing-shoulders d d, and tongue 0, provided with curved slot at, in combination with the block B and retaining-pin b, substantially as set forth.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Tires In General (AREA)
Description
model. I
GENOWAYS LIFTING J No. 269,661. Patented 1300.26, 1882.
jfzf ess NTTED STATES Fri (2E.
PATENT LlFTlNG -JACK.
SPECIFICATION forming part of Letters Patent No';-269,661, dated December 26, 1882.
Application filed January 14, 1882. (Model) 1'0 all whom it may concern:
Be it known that I, CLINTON L. GENO- WAYS, of Williamsburg, in the county of Olermont and State of Ohio, have invented a new and useful Improvement in a'Oombined Tire- Tightener and Lifting-Jack, which is intended as an improvement upon the device invented by me and patented December 14, 1880, and numbered 235,610, of which the following is a specification.
My invention relates to lifting-jacks, its object being to provide therefor a movable head or heads of such construction that the jack will .be enabled to adapt and adjust itself to bearing-surfaces not parallel; to which end it consists in the combination, with the liftingjack, of a movable and selt adjustable head or heads of peculiar construction, which afiord. a secure adj ustablo bearing for the jack and enable it to act effieiently and without undue strains between surfaces not parallel.
My invention is embodied in the mechanism illustrated in the accompanying drawings, exhibiting a jack having right and left hand screws connected and operated in the same axial line by a swivel, by whose rotation the screws are forced apart.
In the drawings, Figure l is a vertical elevation of my improved jack complete. Figs. 2 and 3 are detached side and end views ofthe adjustable head detached; and Figs. 4 and 5 are side and end elevations of one of the screws detached from the swivel.
The swiveling yoke A, right and left hand screws 1) 1), arranged in the same axial line through the end walls of the yoke A, with which the screws engage, and the adjustable heads B B at the outer ends of the screws, constitute thejack to which my improvement is applied. The construction of the yoke and screws is obvious and requires no description. To receive the adjustable heads the screws are formed at their outer ends into tongues c c, flanked on opposite sides by similar semi-cylindrical shoulders, (Z d, as shown in Figs. 4 and 5, which constitute the bearing abntments of the screws in and against their adjustable heads. The heads B B are concave on the under side, as shown in Fig. 3, to fit over and upon the abutmeuts dd, the concavity being cut across its axis by an open slot, as shown in Fig. 2, to receive the tongues c c. The parts being fitted together, the tongue 0 fits within its slot, so as to permit the head to rest and move concentrically upon the shoulders d,-
faces of the head B, and through a slot, a,-
formed in the tongue 0, concentric with the shoulders (I. Thismode of connection, as will be obvious, permits the movement of the head B without allowing the head B to become detached.
With this explanation of the construction the adjust-ability of the heads B to the angles of the resisting-surfaces, as illustrated by the position of the heads in Fig. 1, will be obvious.
The adaptability of the apparatus to use as a tire-tightener will also be clearly apparent, the adjustability of the heads to the radial angle between adjacent spokes being a feature of obviousvalue and utility.
I have shown and described in the drawings and foregoing description a form of apparatus and construction of parts in which my improvement is most clearly apparent; but it will be obvious that the principle of the invention can be embodied in various other forms of mechanism-as, for example, ajack having a single screw-shaft with right and left hand threads operating between two hollow heads, or even a jack having a single screw and a hollow head or base. It will also be evident that the benefits of my improvement can be attained in a degree by using but one movable head in the type of apparatus illustrated in the drawings, and I regard all such constructions as within the spirit of my invention.
Having described my invention, I claim and desire to secure by Letters Patent-- 1. A lilting-jack having its lifting bar or bars terminated by convex bearing-shoulders and a central tongue adapted to engage with and bear upon a correspondiugly-formed head having concave bearing-shoulders and a central slot, substantially as and for the purpose specified.
2. The lifting-bars D, terminating in bearing-shoulders d d, and tongue 0, provided with curved slot at, in combination with the block B and retaining-pin b, substantially as set forth.
CLINTON L. GENOWAYS. Witnesses:
JOHN WATT, J. W. WARING.
Publications (1)
Publication Number | Publication Date |
---|---|
US269661A true US269661A (en) | 1882-12-26 |
Family
ID=2338905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US269661D Expired - Lifetime US269661A (en) | Lifting-jack |
Country Status (1)
Country | Link |
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US (1) | US269661A (en) |
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0
- US US269661D patent/US269661A/en not_active Expired - Lifetime
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