US2889726A

US2889726A - Knuckle saver punch and chisel holder

Info

Publication number: US2889726A
Application number: US684933A
Authority: US
Inventors: Carl A Strabeck
Original assignee: Individual
Current assignee: Individual
Priority date: 1957-09-19
Filing date: 1957-09-19
Publication date: 1959-06-09
Anticipated expiration: 1976-06-09

Description

June 9, 1959 C. A. STRABECK KNUCKLE SAVER PUNCH AND CHISEL HOLDER Filed Sept. 19, 1957 IN VENTOR.

CARL 14. STRA BECK United States Patent KNUCKLE SAVER PUNCH AND CHISEL HOLDER Carl A. Strabeck, Everett, Wash.

Application September 19, 1957, Serial No. 684,933

3 Claims. (Cl. 81-1) This invention relates to hand tools and more particularly to a tool for holding various types of punches and chisels.

It is an object of the present invention to provide an adjustable clamping member for supporting a punch or chisel in an operative position during the striking thereof without endangering the hands of the workmen.

Another object of the present invention is to provide a hand tool of the above type which can be used to secure various types of punches, chisels, and other tools while they are being struck, and which can also be used to loosen or tighten various types of couplings and tubing with a substantial amount of mechanical advantage.

Other objects of the invention are to provide a tool holder bearing the above objects in mind which is of simple construction, has a minimum number of parts, is

inexpensive to manufacture and eflicient in operation.

For other objects and (for a better understanding of the invention, reference may be had to the following detailed description taken in conjunction with the accompanying drawing, in which:

Figure 1 is a perspective view of a tool made in accordance with the present invention in operative use;

Figure 2 is an enlarged longitudinal cross sectional view of the tool shown in Figure 1; and

Figure 3 is an enlarged transverse cross sectional view taken along line 3-3 of Figure 2.

Referring now more in detail to the drawing, a tool made in accordance with the present invention is shown to include a cylindrical tubular housing 12 having a central longitudinal bore 13. A head cap 14 hav ing a central bore 15 concentric with the longitudinal bore 13 of the housing is rigidly secured to and closes one end of the housing. The opposite end of the housing is closed by a jaw cap 17 having a transversely extending V-shaped groove 18 for providing a seat for the tool to be supported. This jaw cap 17 is secured to the housing 12 by means of a plurality of pins, or rivets 19, as is clearly shown in Figures 2 and 3.

Referring now more specifically to Figure 2 of the drawing, a cylindrical block 20 is shown to be slidably supported within the longitudinal bore 13 of the housing. This block 20 has a central threaded bore 21 which threadingly engages with a threaded shaft 23 extending longitudinally of the housing 12 through the central bore 15 of the head cap 14. The outer end of this shaft 23 is provided with a handle 24 for selectively rotating the shaft 23. A pair of radially outwardly extending lugs 26 are slidably received within longitudinal slots 27 on diametrically opposite sides of the housing 12. These lugs 26 guide the block 20 between adjusted longitudinal positions within the housing 12 under the threaded action of the rotated shaft 23. A compression spring 29 acting between the head cap 14 and the facing side of the cylindrical block 20 yieldably urges the block 20 and shaft 23 toward the jaw cap end of the housing.

The ends of a flexible cable 30 are threaded through aligned

apertures

32, 31 in the jaw cap 17 and the cylindrical block 20, respectively, so as to form a bight portion which cooperates with the V-shaped groove 18 of the jaw block in a manner hereinafter described. The ends 33 of the cable are enlarged so as to prevent release thereof from securing engagement with the cylindrical block 20, whereupon rotation of the handle 24 in a clockwise direction will effect longitudinal movement of the block 20 toward the head cap 14 to thus tighten the bight of the cable against the V-groove 18 of the jaw cap.

In actual use, with the holding device in an inoperative position, the handle 24 may be moved outwardly to an adjusted position 24a against the compression spring 29, whereby a limited amount of manual pressure can be exerted. However, the bight of the cable 30 is enlarged sufiiciently to form an enlarged loop, as shown dotted by 30a, to enable the tool 35 to be inserted therein, following which the handle 24 is rotated to draw the cable taut thereagainst. In the tightened position, the device 10 may be used to merely hold the tool 35 in a stationary position or may be used as a mechanical advantage device to effect rotation of the tool 35 about its longitudinal axis. Thus, this tool may be used for various purposes.

While various changes may be made in the detail construction, it shall be understood that such changes shall be within the spirit and scope of the present invention as defined by the appended claims.

What I claim as new and desire to protect by Letters Patent of the United States is:

l. A punch and chisel holder comprising, in combination, a cylindrical tubular housing having a plurality of longitudinally extending slots and a central longitudinal bore, a head cap at one end of said housing, a jaw cap at the opposite end of said housing, a cylindrical block slidably supported within said central bore of said housing having a plurality of radially outwardly extending lugs extending through said slots, a flexible cable, the opposite ends of said flexible cable extending through said jaw cap into said housing, means securing said cable ends to said block, and means effecting selective longitudinal movement of said block relative to said housing, the mid section of said flexible cable defining a bight portion, and said longitudinal movement of said block controlling the size of said bight portion exposed outside of said jaw cap, said means for effecting said longitudinal movement of said block comprising a threaded shaft extending through said head cap into threaded engagement with said block, and a handle secured to said shaft outside of said housing for efl ecting rotation of said shaft.

2. The combination according to claim 1, further comprising a compression spring acting between said head cap and said block normally spring biasing said shaft and handle toward said jaw cap.

3. The combination according to claim 2, wherein said jaw cap is of substantially V-shaped cross sectional configuration.

References Cited in the file of this patent UNITED STATES PATENTS 1,196,252 Le Grand Aug. 29, 1916 2,357,045 Hauer Aug. 29, 1944 2,706,423 Rose Apr. 19, 1955' OTHER REFERENCES Chisel Holder Spares Your Knuckles (Thomas), Popular Science Magazine, July 1948, 811.1, page 184. (Copy in Scientific Library.)

Holder for Chisels Absorbs Shock From Blows, Popular Mechanics Magazine, March 1942, 81-1.1, page 48. Copy in Scientific Library.)