US146640A - Improvement in crow-bars - Google Patents
Improvement in crow-bars Download PDFInfo
- Publication number
- US146640A US146640A US146640DA US146640A US 146640 A US146640 A US 146640A US 146640D A US146640D A US 146640DA US 146640 A US146640 A US 146640A
- Authority
- US
- United States
- Prior art keywords
- bar
- fulcrum
- crow
- bars
- 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
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 235000021028 berry Nutrition 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
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
- the object of the invention is to prevent the sliding or slipping of a pinch-bar on arailroad track or rail when used for the moving of ears and for various other uses. consists of an angular piece of steel inserted in a'transverse slot in the heel of a pinch-bar, forming the fulcrum of the bar, and which presents an angular edge of about one-eighth of an. inch above the surface of the heel of the bar.
- the fulcrum can be easily taken out and replaced, so as to present one of the other angles or edges; also, when the second edge becomes Worn, it may again bechanged; and, in the event of all the angles becoming Worn, anew fulcrum can be substituted at a trifling expense.
- angles of the fulcrum may be either obtuse, rectangular, or acute.
- the invention is an equilateral triangle.
- A represents the angular slot and steel fulcruin for which Letters Patent are asked;
- B B the pinch-bar.
- pinch-bar is believed to be novel and useful.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
Description
UNITED STATES PATENT OFFICE.
ABR-AM V. BERRY, OF JACKSON, MICHIGAN.
IMPROVEMENT IN CROW-BARS.
Specticatiun forming part ot' Letters Patent No. 146,640, (laHlJax;11ax-y 20,1?74; applcainn tiled November 24, 1873i.
To all whom it may concern Be it `known that I, ABRAM V. BERRY, of Jackson, Jackson county, Michigan, have invented an Angular and Adjustable Steel Fulcrum for the Heel of a Pinch-Bar, of which the following is a specification The object of the invention is to prevent the sliding or slipping of a pinch-bar on arailroad track or rail when used for the moving of ears and for various other uses. consists of an angular piece of steel inserted in a'transverse slot in the heel of a pinch-bar, forming the fulcrum of the bar, and which presents an angular edge of about one-eighth of an. inch above the surface of the heel of the bar. When this angle comes Worn, the fulcrum can be easily taken out and replaced, so as to present one of the other angles or edges; also, when the second edge becomes Worn, it may again bechanged; and, in the event of all the angles becoming Worn, anew fulcrum can be substituted at a trifling expense.
The angles of the fulcrum may be either obtuse, rectangular, or acute.
The invention The one represented in the drawing hereto attached is an equilateral triangle.
111 the drawing hereunto attached, A represents the angular slot and steel fulcruin for which Letters Patent are asked; B B, the pinch-bar.
The benefits of this invention are claimed to facility with Which one angle or one fulcruin can be substituted for another.
pinch-bar is believed to be novel and useful.
What I claim as myinventioinand desire to secure by Letters Patent, is-
A pinch-bar having an angular detachable purpose described.
ABRAM v. BERRY.
\Vitnesses:
MELVILLE MCGEE, WM. SEWARD GRIDLE Y.
be its cheapness, its eicency, the ease and The adjustable fulcrum in the heel of a steel fulcrum, A, substantially as and for the
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US146640A true US146640A (en) | 1874-01-20 |
Family
ID=2216054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US146640D Expired - Lifetime US146640A (en) | Improvement in crow-bars |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US146640A (en) |
-
0
- US US146640D patent/US146640A/en not_active Expired - Lifetime
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