US222492A - Improvement in car-jacks - Google Patents
Improvement in car-jacks Download PDFInfo
- Publication number
- US222492A US222492A US222492DA US222492A US 222492 A US222492 A US 222492A US 222492D A US222492D A US 222492DA US 222492 A US222492 A US 222492A
- Authority
- US
- United States
- Prior art keywords
- bar
- car
- lever
- extension
- improvement
- 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
- 210000003414 Extremities Anatomy 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000001141 propulsive Effects 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61J—SHIFTING OR SHUNTING OF RAIL VEHICLES
- B61J3/00—Shunting or short-distance haulage devices; Similar devices for hauling trains on steep gradients or as starting aids; Car propelling devices therefor
- B61J3/10—Car shunting or positioning devices with pinchbar action
Definitions
- Said extension-baris provided at its upper end with a clasping-hook or adjustable clamp to secure the head of the bar to the rear sill of the car.
- Afriction-roller is placed between said bar and the operating-arm of the lever, and the latter is pivoted in the outer or rear edge of the main or foot bar, out of the line of the direction ofithe extension-bar.
- the point of the working end of the lever is connected, by means of a chain or jointed connection, with said extension-bar, to serve as a fulcrum to draw up the main or foot bar to the extension-bar at each downward motion of said lever at each remove of the car.
- I construct this jack is as follows: Arepresents the main or foot bar, having the usual fork a, to clasp the I car-rail; B, the sliding extension-bar, moving in a slot orspace within the bar A, also confined to said end motion by means of lugs b b, projecting from said bar into the slots at d on either side of the main bar A, which latter bar is composed of two side pieces connected by bolts and confining the extensionbar B between them, but allowing of end motion, as said. Said extension-bar B has pivoted to its free extremity a clamping-hook,
- - D is the friction-pulley, placed between the said bar B and the curved arm of the lever E, the spindles .of which slide in the lateral slots, d d, in the side pieces of main bar A; E, the operating-lever, pivoted in the rear edges of the main bar A in such a mode that the strongly-curved operating-arm of said lever will have good propulsive power upon the friction-pulley D.
- the point of the shorter arm of said lever is connected by chain 9 with the extension-bar B, to cause the main bar to walkz'. 0., that the downward throw of this arm of the lever is checked by the chain, so as to raise the pivot of the lever, and with it the bar A.
- the friction-roller may be made independent, or be attached by means of straps to the extension-bar B.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Emergency Lowering Means (AREA)
Description
J. J. HAMILTON. Gar-Jack.
No. 222,492. Patented Dec. 9,1879.
MPETERS, PHOTOJJTHOGRAFHER, WASHMGTON D C.
UNITED STATES PATENT OFFICE.
JOHN J. HAMILTON OF .'EUREKA, ILLINOIS, ASSIGNOB OF ONE-HALF OF HIS RIGHT TO JOHN W. STONE, OF SAME PLACE.
IMPROVEMENT Specification forming part of Letters Patent N 0. 222,492, dated December 9, 1879; application filed October 4, 1879.
To all whom it may concern:
Be it known that I, J OHN J. HAMILTON, of
Eureka, in the county of Woodford, in the State of Illinois, have invented an Improvement in (Jar-Jacks and I do hereby declare that the following is a full, clear, and exact descrip- I main or foot bar, in which said extension-bar slides and in which said lever is pivoted.
Said extension-baris provided at its upper end with a clasping-hook or adjustable clamp to secure the head of the bar to the rear sill of the car. Afriction-roller is placed between said bar and the operating-arm of the lever, and the latter is pivoted in the outer or rear edge of the main or foot bar, out of the line of the direction ofithe extension-bar.
The point of the working end of the lever is connected, by means of a chain or jointed connection, with said extension-bar, to serve as a fulcrum to draw up the main or foot bar to the extension-bar at each downward motion of said lever at each remove of the car.
One of the forms in which I construct this jack is as follows: Arepresents the main or foot bar, having the usual fork a, to clasp the I car-rail; B, the sliding extension-bar, moving in a slot orspace within the bar A, also confined to said end motion by means of lugs b b, projecting from said bar into the slots at d on either side of the main bar A, which latter bar is composed of two side pieces connected by bolts and confining the extensionbar B between them, but allowing of end motion, as said. Said extension-bar B has pivoted to its free extremity a clamping-hook,
0, adjustable at different angles, to clasp the rear sill of a car and be held in such position by means of a link, e,.or similar device, pivotedto the bar B below the hook-pivot, and engageable with the serrated arm of said hook in the rear of the bar B.
- D is the friction-pulley, placed between the said bar B and the curved arm of the lever E, the spindles .of which slide in the lateral slots, d d, in the side pieces of main bar A; E, the operating-lever, pivoted in the rear edges of the main bar A in such a mode that the strongly-curved operating-arm of said lever will have good propulsive power upon the friction-pulley D. The point of the shorter arm of said lever is connected by chain 9 with the extension-bar B, to cause the main bar to walkz'. 0., that the downward throw of this arm of the lever is checked by the chain, so as to raise the pivot of the lever, and with it the bar A.
The friction-roller may be made independent, or be attached by means of straps to the extension-bar B.
The advantages of this car-jack are as follows: First, the hook O fastens the jack to the car, so that much trouble in keeping the jack up to the car is obviated; second, the chaining of the extension-bar to the lever draws the foot-bar up to its place without other manipulation third, the pivoting of the lever out of the .line of propulsion of the extension -bar, in combination with the camlike surface of the bearing-arm of the lever, confers extra advantages, and, in connection with friction-roller placed between the lever and extension-bar, greatly helps the action of such levers on extension-bars fourth, obviating all damage to the car (by abrasion of the wood-work, &c.,) by doing away with the com mon sharp pointed head of the propulsionbar of the common jack, and substituting blunt end and a claw-hook, O, and clamp e.
What I claim as my invention is- 1. In a car-jack, a freely-pivoted hook, G, as constructed and arranged for engagement with link 6, pivoted below it in the usual extension-bar B, as constructed. w
2. In a car-jack having sliding extensionbars A B, the combination of the swinging clamping-hook O and swinging hook-detent c with the upper bar, B, having the frictionroller D thereon, and cam-lever E, attached by chain 9, with main bar, A, all arranged as specified.
In testimony that I claim the foregoing improvement in c'arjacks I have hereunto set my hand.
Witnesses: JOHN J. HAMILTON.
D. J. PEFFERS, J. H. MORRON.
Publications (1)
Publication Number | Publication Date |
---|---|
US222492A true US222492A (en) | 1879-12-09 |
Family
ID=2291887
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US222492D Expired - Lifetime US222492A (en) | Improvement in car-jacks |
Country Status (1)
Country | Link |
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US (1) | US222492A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2665109A (en) * | 1949-09-09 | 1954-01-05 | Michael S Romby | Spring tool |
US3207657A (en) * | 1963-01-22 | 1965-09-21 | Huyck Corp | Method and apparatus for making paper by contracting the forming carrier to compact the web |
-
0
- US US222492D patent/US222492A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2665109A (en) * | 1949-09-09 | 1954-01-05 | Michael S Romby | Spring tool |
US3207657A (en) * | 1963-01-22 | 1965-09-21 | Huyck Corp | Method and apparatus for making paper by contracting the forming carrier to compact the web |
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