US2717618A

US2717618A - Chisel tool with shock-absorbing handle

Info

Publication number: US2717618A
Application number: US321480A
Authority: US
Inventors: Bernard L Polkosnik
Original assignee: GENERAL HARDWARE Mfg CO Inc
Current assignee: GENERAL HARDWARE Mfg CO Inc
Priority date: 1952-11-19
Filing date: 1952-11-19
Publication date: 1955-09-13
Anticipated expiration: 1972-09-13

Description

Sept. 13,- 1955 B. L. POLKOSNIK 2,717,618

CHISEL TOOL WITH SHOCK-ABSORBING HANDLE Filed Nov. 19, 1952 3i f 28 J S i United States Patent CHISEL TOOL WITH SHQCK-ABSORBING HANDLE Bernard L. Polkosnik, Bridgeport, Conn., assignor to General Hardware Mfg. Co. Inc., New York, N. 1., a corporation of New York Application November 19, 1952, Serial No. 321,480

3 Claims. (Cl. 14524) The present invention relates to handles for hand tools of the type which are used by being struck with a hammer or mallet.

The principal object of this invention is to provide a novel and improved shock-absorbing handle construction for hand tools of the character mentioned.

A further object is to provide a novel and improved handle of the kind set forth which is adaptable to be included in the manufacture of tools used with a hammer, which handle is simple and reasonably cheap to make and which is eflicient in carrying out the purposes for which it is designed.

Other objects and advantages will become apparent as this disclosure proceeds.

in the accompanying drawings forming part of this specification, similar characters of reference indicate corresponding parts in all the views.

I have chosen to illustrate the practice of this invention by special but by no means exclusive application to a carpenters butt gauge.

Fig. l is a perspective view showing such a butt gauge provided with a shock-absorbing handle constructed in accordance with the teachings of this invention.

Fig. 2 is a similar view of the article minus the handle.

Fig. 3 is an end view of Fig. 1.

Fig. 4 is like Fig. 3, but of a slightly modified construction.

Fig. 5 is a section taken at lines 5-5 in Fig. 2.

Fig. 6 is a section taken at either set of lines 66 in Fig. 2.

Fig. 7 is an enlarged end view of Fig. 1, showing the position the components of the handle assume when the tool is held in hand by the handle part, while the butt gauge part rests on the edge of a door and is being struck by a hammer; the hand and hammer being not shown.

In the drawings, the numeral designates generally the complete tool selected to explain this invention. The butt gage part is an open rectangular box structure 16 which is positioned inverted. One longitudinal wall 17 and both

end walls

18, 18 are chisel cutting blades. The other longitudinal wall 17 has laterally extending lugs 19 and downwardly extending lugs 20. The handle which is denoted generally as 21, extends laterally from the wall 17', and is secured by rivets 22 to the underside of the lugs 19. The lugs serve to position the butt gauge part 23 on for instance a door edge 24 which is to be marked for a hinge plate cut-out. The numeral 25 points to a corner formed by adjacent cutting blades. The underside of the floor of the box structure 16, is designated by the numeral 26, and is the surface hit with a hammer; such surface being on top in the use of the tool.

The handle member 21 is comprised of two

blades

27 and 28 which are of spring steel and are comparatively of thin stock. These blades are one over the other and in the embodiment shown in Fig. l, are in surface contact. The upper one is of a dimension to overlap only part of the lower one. The exposed longitudinal edge 2,717,618 Eatented Sept. 13, 1955 of the lower one 28, where the tool is held in hand, has an enlargement which may be a piece of bar stock 29 secured therealong. It is evident that both

blades

27, 28 are mounted in cantilever fashion.

In use, a right-handed craftsman with hammer in right hand, will hold the tool 15 in left hand whereby fingers of the left hand are under the blade 28, with the thumb on the bar 29. So held, the tool is placed so that the butt gauge part 23 is atop the surface 24, with lugs 20 against the door face 24. Upon striking surface 26 with the hammer, the

blades

27, 28, due to the impact, will assume the downwardly arched, flexed position shown in Fig. 7, the upper blade acting on the lower blade by exerting a restraining force shown by the arrow A. The user will experience no shock.

In the modified embodiment shown in Fig. 4, the upper blade 30, along its free edge, has a comparatively short downward flange 31, the free edge of which contacts the upper surface of the lower blade 28.

The action of the upper blade spring is to provide a downward force on the lower blade spring 28, intermediate the free edge of the latter and the tool body proper. This construction absorbs the shock and prevents the bending or even breaking off of the blade spring 28 at the lugs 19, which would occur were the upper blade spring omitted.

This invention is capable of numerous forms and various applications without departing from the essential features herein disclosed. It is therefore intended and desired that the embodiments shown herein shall be deemed illustrative and not restrictive and that the patent shall cover all patentable novelty herein set forth; reference being had to the following claims rather than to the specific description and particular adaptation herein, to indicate the scope of this invention.

I claim:

1. In an article of the character described, a plate member to be struck on the top surface thereof with a hammer, a plurality of chisel blades extending downwardly from said plate member, a flange extending downwardly from said plate along one edge of said plate, a pair of flexible blade spring members positioned one below the other and secured to the said flange to extend laterally therefrom in cantilever fashion; the lower blade spring member extending further from the said flange than the upper one and adapted to be held in hand in the region thereof which extends beyond the upper one; said blade spring members being in constant contact at least at a predetermined distance away from the said flange.

2. The article as defined in claim 1, wherein the upper blade spring member is provided with a downward flange at a distance from the flange depending from the plate and wherein only the said flange on the upper blade spring member contacts the lower blade spring member.

3. The article as defined in claim 1, wherein the upper blade spring member contacts the lower one only along that edge of the former which is furthest from the flange.

References Cited in the file of this patent UNITED STATES PATENTS 281,217 Wiedmann July 10, 1883 604,379 Flyckt May 24, 1898 1,177,472 Bartlett Mar. 28, 1916 1,428,015 Dienner Sept. 5, 1922 1,895,124 Crafts et a1 Jan. 24, 1933 1,927,973 Bull Sept. 26, 1933 2,547,489 Priebe Apr. 3, 1951 FOREIGN PATENTS 658,550 France June 5, 1929