US321812A - Foundryman s clamp - Google Patents
Foundryman s clamp Download PDFInfo
- Publication number
- US321812A US321812A US321812DA US321812A US 321812 A US321812 A US 321812A US 321812D A US321812D A US 321812DA US 321812 A US321812 A US 321812A
- Authority
- US
- United States
- Prior art keywords
- clamp
- jaw
- bar
- flask
- lever
- 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
- 210000001847 Jaw Anatomy 0.000 description 32
- 208000007101 Muscle Cramp Diseases 0.000 description 4
- 206010028334 Muscle spasms Diseases 0.000 description 4
- 210000000282 Nails Anatomy 0.000 description 4
- 210000003414 Extremities Anatomy 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000414 obstructive Effects 0.000 description 2
- 230000000284 resting Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B1/00—Vices
- B25B1/06—Arrangements for positively actuating jaws
- B25B1/10—Arrangements for positively actuating jaws using screws
- B25B1/12—Arrangements for positively actuating jaws using screws with provision for disengagement
- B25B1/125—Arrangements for positively actuating jaws using screws with provision for disengagement with one screw perpendicular to the jaw faces
Definitions
- This improvement relates to that class of clamps wherein there is a bar having a jaw fixed thereto and another jaw movable thereon, and provided with means whereby the movable jaw may be moved and xed in position.
- Clamps of this description have been heretofore made in a great variety of ways; but, so far as I am aware, none are so well adapted to the use of foundrymen as the one which I have devised, because the use of screws and other movable devices for producing pressure after the movable jaw has been fixed are objectionable in a place where the device is not only subjected to rough usage, but to the constant presence of dust and dirt.
- My invention therefore consists in a clamp composed of a rectangular bar having ratchetteeth eut along one face, and a laterally-projecting fixed jaw at one end, and a movable jaw fixed to a shortbar with ratchet-teeth along one side, and guidelclps through which the rst-named bar passes, whereby the ratchetteeth are brought opposite and in a position to engage, and a detached clamp-lever with a hinged f'ulcrum, whereby when the jaws have been moved to position they may be caused to cramp the edges of the flask.
- A is the principal or clamp bar, provided along one side with ratchet-teeth b, and at one end there is a rigidly-fixed and laterally-projecting arm, c, which constitutes one jaw of the clamp.
- This jaw is at the extremity of bar A, so that it may be inserted under a flask or other thing sitting on the iioor without meeting obstruction other than that incident to the thickness of the jaw C. This is a (No model.)
- the counter or opposing jaw D is attached to a shorter bar, e, also provided with ratchet-teeth f, which are adapted to engage the ratchet-teeth Z) and prevent a further separation of the jaws C D.
- the bar e is provided with clips g g, which pass around the bar A and act as guides for the forward and backward motion of the bar e on the bar A.
- the jaw C When the flask is to be clamped, the jaw C is slipped under the lower edge of the iiask, and the jaw D is caused to descend until in contact with the upper edge of the flask, and then, by a sidewise tilt of the clamp, the teeth b and f are caused to engage and the jaws C and D to cramp on the edges of the flask.
- I employ a lever, I-I, provided with a fulcrum, i, hinged to said lever, and having a biting edge or surface at its lower end, so that when resting upon the edge of the flask and in action it will not slip.
- Said lever is used by placing its point against the clamp close down to the edge of the flask, and thus moving the foot of the fulcrum i as far forward toward said point as possible. The outer end of the lever is then pressed downward and forward, and the point of said lever with the clamp is forced forward until the cramping action of the clamp is as strong and rm as desirable. The clamp may be instantly released by restoring it to an upright position.
- a nail or other wedge shaped object inserted between one of the clips g and the back of' the bar A will prevent any accidental disengagement of the ratchet-teeth.
- a clamp composed ofthe bar A, pro vided with ratchetteeth b, and laterallyprd which the bur is caused to slide, combined with the hinged lever H, provided with hinged fulcrum 17, as set forth.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Devices For Molds (AREA)
Description
Unirse Srar'ns PATENT Ormea.
THOMAS HARDING, OF DETROIT, MICHIGAN.
FOUNDRYIVIANS CLAIVIP.
SPECIFICATION forming part of Letters Patent No. 321,812, dated July 7, 1885.
Application filed January 5, 1885.
To all whom it may concern,.-
Be it known that I, THOMAS HARDING, of Detroit, in the county of Vayne and State of Michigan, have invented a new and useful Improvement in Clamps, especially applicable for foundry use; and I do hereby declare that the same is fully and accurately described in the following specification.
This improvement relates to that class of clamps wherein there is a bar having a jaw fixed thereto and another jaw movable thereon, and provided with means whereby the movable jaw may be moved and xed in position. Clamps of this description have been heretofore made in a great variety of ways; but, so far as I am aware, none are so well adapted to the use of foundrymen as the one which I have devised, because the use of screws and other movable devices for producing pressure after the movable jaw has been fixed are objectionable in a place where the device is not only subjected to rough usage, but to the constant presence of dust and dirt. My invention therefore consists in a clamp composed of a rectangular bar having ratchetteeth eut along one face, and a laterally-projecting fixed jaw at one end, and a movable jaw fixed to a shortbar with ratchet-teeth along one side, and guidelclps through which the rst-named bar passes, whereby the ratchetteeth are brought opposite and in a position to engage, and a detached clamp-lever with a hinged f'ulcrum, whereby when the jaws have been moved to position they may be caused to cramp the edges of the flask.
That others may fully understand my invention, I will particularly describe it, having reference to the accompanying drawing, wherein the figure is a perspective view of my clamp in operative position.
A is the principal or clamp bar, provided along one side with ratchet-teeth b, and at one end there is a rigidly-fixed and laterally-projecting arm, c, which constitutes one jaw of the clamp. This jaw is at the extremity of bar A, so that it may be inserted under a flask or other thing sitting on the iioor without meeting obstruction other than that incident to the thickness of the jaw C. This is a (No model.)
great advantage when considered with regard to such work as that which goes on in a foundry. The counter or opposing jaw D is attached to a shorter bar, e, also provided with ratchet-teeth f, which are adapted to engage the ratchet-teeth Z) and prevent a further separation of the jaws C D.
The bar e is provided with clips g g, which pass around the bar A and act as guides for the forward and backward motion of the bar e on the bar A.
When the flask is to be clamped, the jaw C is slipped under the lower edge of the iiask, and the jaw D is caused to descend until in contact with the upper edge of the flask, and then, by a sidewise tilt of the clamp, the teeth b and f are caused to engage and the jaws C and D to cramp on the edges of the flask. To increase this latter action and make the cramping firm and secure, I employ a lever, I-I, provided with a fulcrum, i, hinged to said lever, and having a biting edge or surface at its lower end, so that when resting upon the edge of the flask and in action it will not slip. Said lever is used by placing its point against the clamp close down to the edge of the flask, and thus moving the foot of the fulcrum i as far forward toward said point as possible. The outer end of the lever is then pressed downward and forward, and the point of said lever with the clamp is forced forward until the cramping action of the clamp is as strong and rm as desirable. The clamp may be instantly released by restoring it to an upright position.
lf, for any reason, accidental release of the clamp must be provided against, a nail or any other wedge-shaped object inserted under the uptilted edge of the jaw D will prevent the clamp from resuming an upright position.
A nail or other wedge shaped object inserted between one of the clips g and the back of' the bar A will prevent any accidental disengagement of the ratchet-teeth.
,Having described my invention, I claim as new l. A clamp composed ofthe bar A, pro vided with ratchetteeth b, and laterallyprd which the bur is caused to slide, combined with the hinged lever H, provided with hinged fulcrum 17, as set forth.
THOMAS HARDING.
Vitnesses:
HARRY B. TYLER, JN0. WORTIHNGTON.
Publications (1)
Publication Number | Publication Date |
---|---|
US321812A true US321812A (en) | 1885-07-07 |
Family
ID=2390951
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US321812D Expired - Lifetime US321812A (en) | Foundryman s clamp |
Country Status (1)
Country | Link |
---|---|
US (1) | US321812A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4805889A (en) * | 1987-11-09 | 1989-02-21 | Liepse Robert K | Chain-keeper |
-
0
- US US321812D patent/US321812A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4805889A (en) * | 1987-11-09 | 1989-02-21 | Liepse Robert K | Chain-keeper |
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