US2503978A - Shears - Google Patents

Description

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April 11, 1950 Patented Apr. 11, 1950 SHEARS Peter S. Vosbikian and Thomas S. Vosbikian, Melrose Park, Pa.

Application April 10, 1946, Serial No. 661,125

4 Claims. 1

The object of our invention is to devise a novel shears which will be easy to operate and which can be economically manufactured.

A further object of the invention is to devise a novel construction of blades, the cooperating surfaces or edges of which may be adapted for cutting, gripping, holding or bending in accordance with the work to be performed.

A further object of the invention is to devise novel actuating means for the blades whereby the blades in their closing movement are wedged or cammed towards each other.

With the foregoing and other objects in View as will hereinafter clearly appear, our invention comprehends a novel bladed tool and novel means for actuating the blades.

For the purpose of illustrating the invention, we have shown in the accompanying drawings a preferred embodiment thereof which we have found in practice to give satisfactory and reliable results. It is, however, to be understood that the various instrumentalities of which the invention consists can be variously arranged and organized and the invention is not limited to the exact arrangement and organization of these instrumentalities as herein set forth.

Figure 1 is a top plan view of shears embodying our invention.

Figure 2 is a top plan view partly in section with the upper handle removed.

Figure 3 is a top plan view with the handles removed.

Figure 4 is a detail of one of the blades and a locking latch.

Figure 5 is a longitudinal section.

Similar numerals of reference indicate corresponding parts.

Referring to the drawings:

The bladed tool embodying this invention has been shown in the form of grass shears. The blades I and 2 have a fixed pivot 3 on which they turn. The closing movement of the blades is eiiected by means of a cam member 4 having at opposite sides ears 5 and 6, provided respectively with cam slots I and 8. A cam pin 9 fixed in the blade 2 passes through the slot 1, and a similar cam pin I0 fixed in the blade I passes through the slot 8. These cam pins are shown in the form of rivets.

An upper handle II has a bearing plate I2 apertured to receive the pivot 3. A lower handle i3 is pivoted at M to the upper handle I I and is pivoted at Hi to upwardly deflected portions at the rear end of the cam member 4.

The blades are locked in their closed position 2 by a latch I6 mounted on the cam pin I0 and looking with a shoulder I! on the blade 2. A spring I8 encircling the pivot I4 has arms bearing against the handles and tends to move the handles into their open position.

The cam member 4 has a longitudinally extending slot I 9 through which the pivot 3 passes, and is slidably mounted between the blade 2 and the bearing plate I2 of the handle II. This slot I9 in the cam plate cooperates with the pivot pin 3 to guide the cam plate and to also limit the opening and closing movements of the blades.

It will now be apparent that when the handles are grasped in the hand of the operator and the lower handle I3 raised, the cam 4 will be drawn rearwardly and the walls of the cam slots I and 8 will cause the cam pins 9 and II) to move inwardly and forwardly. Since the cam pins are fixed to the blades at opposite sides of the median line of the tool, the blades will turn on their pivot 3 to their closed position. When the pressure on the handle I3 is released, the'spring I8 will cause the handles and blades to return to their normal position or open position.

Having thus described our invention, what we claim is new and desire to secure by Letters Patent is:

1. In a bladed tool, blades having a fixed pivot,

each blade having an arm extending outwardly,

and rearwardly beyond the fixed pivot, a cam pin fixed to each arm, a cam slide having relative movement with said fixed pivot and having cam slots to receive the cam pins and thereby effect turning movement of the blades, a handle secured in position above said cam slide by said fixed pivot, a second handle pivoted to the first handle and to said cam slide to actuate the latter, and a spring tending to separate the handles.

2. The construction specified in claim 1 wherein the cam slide has a longitudinally extending slot through which the fixed pivot extends.

3. In a bladed tool, an upper and a lower blade, each blade having a pivot receiving opening, an upper handle having a forwardly extending plate with a pivot receiving opening, a cam slide slidable between the handle plate and the upper blade, having a longitudinally extending slot to receive a pivot pin, and having at its rear end at opposite sides of the median line of the tool outwardly and rearwardly directed cam slots, a cam pin fixed to one blade and extending into one cam slot, a cam pin fixed to the other blade and extending into the other earn slot, a pivot pin extending through the pivot receiving openings and slot to secure the blades, cam slide and upper 3 handle in assembled condition, a lower handle pivoted to said upper handle and to the rear end of said cam slide, and a spring between the handles tending to open the blades.

4. The construction specified in claim 3, wherein the length of the longitudinal slot in the cam slide which cooperates with the pivot pin defines .the extent of the opening and closing movement of the blades.

PETER S. VOSBIKIAN. THOMAS S. VOSBIKIAN.

REFERENCES CITED The following references are of record in the file of this patent:

Number 5 UNITED STATES PATENTS Name Date Vaughan Aug. 23, 1927 Simonsen Dec. 29, 1942 Bowman Sept. 7, 1943

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