US2251730A

US2251730A - Safety hand vise

Info

Publication number: US2251730A
Application number: US336869A
Authority: US
Inventors: Leo W Caldwell
Original assignee: Individual
Current assignee: Individual
Priority date: 1940-05-23
Filing date: 1940-05-23
Publication date: 1941-08-05
Anticipated expiration: 1958-08-05

Description

Aug. 5, 1941. L. w. CALDWELL SAFETY HAND VI SE Filed May 23, 1940 In ventor A itorneys Patented Aug. 5, 1941 UNITED STATES PATENT OFFIQE SAFETY HAND VISE Leo W. Caldwell, San Diego, Calif. Application May 23, 1940, Serial No. 336,869

1 Claim.

The present invention relates to new and useful improvements in tools, for use particularly by mechanics and has for its primary object to provide, in a manner as hereinafter set forth, a device embodying novel means for firmly gripping and holding a piece of work while various operations, such as grinding on an emery wheel, are performed, thus reducing the danger of sustaining injury to a minimum.

Another very important object of the invention is to provide a tool of the aforementioned character which is adapted to securely hold pieces of work of different shapes and sizes.

Other objects of the invention are to provide a tool of the character described which will be comparatively simple in construction, strong, durable, highly efiicient and reliable in use, compact, light in weight and which may be manufactured at low cost.

All of the foregoing and still further objects and advantages of the invention will become apparent from a study of the following specification, taken in connection with the accompanying drawing wherein like characters of reference designate corresponding parts throughout the several views, and wherein:

Figure 1 is a view in side elevation of a safety hand vise constructed in accordance with the present invention, a portion of one of the jaws being broken away in section.

Figure 2 is a top plan view of the tool with an end portion of the handle removed.

Figure 3 is an elevational view, looking at the forward end of the tool.

Referring now to the drawing in detail, it will be seen that the embodiment of the invention which has been illustrated comprises what may be considered a stationary upper jaw I of angle iron. Projecting from one end of the jaw I is an integral, offset shank 2 which is firmly secured in a handle 3.

Mounted beneath the jaw I and cooperable therewith is a movable or adjustable jaw 4 of suitable metal having beveled ends 5. It will be observed that the face of the jaw 4 is flat.

Fixed at an intermediate point in the movable jaw 4 and extending slidably through the stationary jaw I is a guide post 6. Also fixed in the adjustable jaw 4, forwardly of the guide post 6, and extending slidably through the stationary jaw I is a threaded stem 1. Mounted on the stem 1 is a knurled adjusting nut 8. A keeper 9 mounted on the apex or angle of the jaw I rotatably secures the adjusting nut 8 on said jaw I.

'I'hreadedly mounted in the rear portion of the stationary jaw I is a thumb screw II]. The thumb screw II] is provided on its upper end with a knurled head II and a flat or wing type head I2. The head I2 of the thumb screw II] has formed therein an opening l3 for receiving a suitable pin or other operating instrument.

The rear or inner end portion of the movable lower jaw 4 is provided with a socket I4 in which the lower end portion of the thumb screw I0 is engaged. The forward portion of the stationary jaw I is recessed or stepped, as at I5, to accommodate fiat pieces of work.

It is thought that the manner of using the device will be readily apparent from a consideration of the foregoing. Briefly, the jaws I and 4 are opened to the desired extent to receive the piece of work therebetween. The jaws I and 4 are then closed on the work through the medium of the nut 8 on the threaded stem 1. Then, the thumb screw I0 is threaded downwardly through the stationary jaw I for rocking the movable jaw 4 in a manner to firmly clamp the work, there being sufiicient looseness or play between the members 6 and l and the stationary jaw I to permit this. As will be readily apparent, when the movable jaw 4 clamps a piece of work longitudinally in the angle iron jaw I, said work is positively secured against lateral movement. The recesses I5 facilitate the mounting of flat work in the tool and provide shoulders I6 which positively prevents said fiat work from sliding rearwardly after it has been clamped between the jaws.

It is believed that the many advantages of a safety hand vise constructed in accordance with the present invention will be readily understood and although a preferred embodiment of the tool is as illustrated and described, it is to be understood that changes in the details of construction and in the combination and arrangement of parts may be resorted to which will fall within the scope of the invention as claimed.

What is claimed is:

A tool of the class described comprising a handle, an angle iron jaw, for the reception of round work, mounted longitudinally on said handle, said jaw having recesses in the forward end portions of its longitudinal edges for the reception of flat work, stop shoulders at the rear ends of the recesses engageable with the flat work, a movable jaw, and means-for adjusting said movable jaw toward the stationary jaw for clamping the work therebetween.

LEO W. CALDWELL.