US1609638A - Scissors - Google Patents

Description

2 Sheets-Sheet 1 fizz/4M AZ 25/0451? ATi'ORNEY INVENTOR Dec. 7 1926.

w. A. ZEIDVLER SCISSORS Filed Oct. 6. 925

Dec. 7 1926.

W. A. ZEIDLER SCISSORS Filed 00 1- 6 1925 2 Sheets-Sheet Z IN ENTOR wan/v AL-Zevaum {ATTORNEY Patented Dec. 7, 1926.

UNITED STATES PATENT OFFICE.

WILLIAM A. ZEIDLER, OF NEW YORK, N. Y., ASSIGNOR TO HURLBURT RESEARCH COR- PORATION, OF NEW YORK, N. Y.,

A CORPORATION OF DELAWARE.

SCISSORS.

Application filed October 6, 1925.

The object of my invention is to provide a pair of scissors with removable blades which may be readily made and used and when the blades become dull they may be easily removed and replaced. This and other objects are accomplished by my invention, one embodiment of which is hereinafter more particularly set forth.

For a more detailed description of my invention, reference is to be had to the accompanying drawings, forming a part hereof, in which- Figure 1 is a plan view of a pair of scissors embodying my invention.

Figure 2 shows the elements separated.

Figure 3 is a longitudinal section showing the part of the scissors with the blade in place.

Figure 4: is a perspective view of a blade.

Figures 5, 6 and 7 are sectional views taken on the lines 5--5, 66 and 77, respectively, of Figure 1, looking in the direction of the arrows.

Figure 8 shows the scissor elements in plan, and

Figure 9 is a perspective view of an end of one element with the blade removed.

Throughout the various views of the drawings, similar reference characters designate similar parts.

My improved scissors 1 is composed of two scissor elements 2 and 3, respectively. Each of these elements carries a blade 4 which at one end is held by a socket 5 which forms an integral part of the blade 4 and is made by folding over a lateral extension and at the other end is held by the walls of an opening 6 which engages the pivot 7, thus anchoring one end of the blade. This illustrated arrangement of anchoring is a convenient one, though not imperative. In fact any desired form of anchorage may be employed to meet the exigencies of any particular requirement.

Each blade 4 has a base 8 which is bent and ground with concave-convex surfaces, the convex surface being next the scissor element which supports the blade and the concave surface being adjacent to the opposite blade. The socket 5 of each blade 4 is formed by extending a flange 9 laterally, or nearly so, from the base 8 and thereafter again laterally and nearly parallel to this base, as indicated at 10, and thereafter, the outer edge is brought close to the cutting edge Serial No. 60,745.

diagonal or angular engagement of the r of the blade'or scissors element during the cutting operation; and the pressure, by the cutting operation, thus tends to hold the edges of the blades together in true articulation during the entire length of the cut. Obviously, as the blade is held by the socket 5, against the angular shoulder of the scissors element and is further anchored in suitable manner at its opposite end, as by the cooperative engagement with the pivot 7, any force applied to the meeting edges of the blades tends to drive said blades up the angles of the scissors elements thus putting a further tension upon the already tensioned blades.

This additional tension is greater or less, dependent upon the demands put upon the cutting blades at their meeting edges, but it gives, in any event, pull on the cutting edges, of the blades, into true articulating position so that a clean shearing cut and not a crushing strain is placed on the materials to be out between the blades.

Each scissor member has a reduced end 13, as indicated in Figure 9, so as to properly fit the socket 5, as shown.

Each blade 4 is not only made concaveconvex, as above described, but it is also tempered so that when free of the pivot 7 it will bend away from the scissor element to which it is attached, as shown at 14, in Figure 2. This makes a resilient blade which tends to keep the scissor elements 2 and 3 with a proper frictional contact with the pivot 7 There is another reason why this curved feature is very important when taken in connection with the socket at one end of the blade and with the pivot at the other. The socket at the end of the blade must be a little large to give the requisite tolerance necessary to have the blades and scissor elements interchangeable and always fit.

T his largencss makes a looscness and provision must be made to take up this looseness. This provision is the curvature of the blade which takes up this looseness and makes a tight, snug fit with the scissor element when the end remote from the socket is held by the pivot.

'lhe pivot 7 is composed of a nut 15, a screw it; and a washer 17. The washer 17 his on the nut 15 and is so made that it cannot turn thereon and the nut 15 is preferablv slit where the washer 1T rests thereon, as shown at 19 in Figure 7. so that pressure is put on the screw it to hold the same tight. The scissor element 2 's made square where it engages the nut '15) so that the nut 15 will not turn in this element but move with it and the washer l? is in a corresponding recess in the eltunent 3 so that the element turns on the nut. which round at this part, and against the washer 1T.

Menuhin; nrv 'niproved szissors to be made. as indica ted and complete i. it is used in the ordii'iarv way a d when the blades become dull the pivot T is opened by removing the screw 16 and separating the parts so that the blades may be moved oil, as shown in l igure 8, and ne blades substituted. and thereafter the parts are reassembled against the tension of the blades, as indicated in Figure 2 and the screw 16 ot' the pivot 7 given the proper tightness so as to put the elements 2 and 3 in proper tension. Thereafter the scissors are used as before.

While l have shown and described one embodiment of my invention, it is obvious that it not restricted thereto, but that it is broad enough to cover all structures that come within the scope of the annexed claims.

lilavinn' thus described my invention, what I claim is:

1. A pair of scissors composed of two elemeats, a connecting pivot and a removable tacin eblade on each element, each blade being normally curved away from its base element, and provided with a terminal socket adapted to engage the end of its element, and another terminal part with means for holding the same in position when the blade is in place.

2. A pair of scissors composed of two elements, a connecting pivot and a removable facing blade on each element, each blade being normally curved away from its base element, and provided with a terminal socket adapted to engage the end of its element, an d another terminal part adapted to engage the pivot and be held by the same.

3. A pair of scissors composed of two elements. :1 connecting pivot and a removable Facing blade on each element, each blade being normally curved away from its base element, and provided with a terminal socket with diagonal edge adapted to engage the end of its clement and another terminal part adapted to engage the pivot and be held by the same.

it. t rcmm'aljile blade for scissors composed ot a ba e perforated at one end to receive a pivot and provided at the other with a socket with a diagonal edge so that the blade will be forced into intimate engagement with its support while function- .1 a cutting element.

A removable blade for scissors com 3 a base per-iterated at one end to receive a pivot and provided at the other -"'th a socket with anedge so that the blade will be forced into intimate engagement with its support while functioning as a cutting element.

(3. it removable blade for scissors having one end formed to be operatively anchored and provided with a support engaging socket, said socket having a diagonal edge permitting automatic regulating adjustment of the blade while functioning as a cutting element.

7. A removable cutting blade for scissors havin one end formed to operatively engage a pivot and to be anchored to a movable scissors element, and formed with a support engaging means appurtenant to the opposite end thereof and means of engagement with the support providing an auto matic tensioning ot' the blade while anchored and functionin as a cutting element.

9. A pair of scissors composed of twointerengaged elements and a removable facing blade on each element each blade being anchored to its respective element at one end, against longitudinal movement, and with a socket adapted to engage the element, and means for auton'iatically efi' ecting a longitudinal tcnsioning of the blades while functioning as cutting elements.

In testimony whereof I have hereunto set my hand this 2nd day of October, 1925.

- VVILLTAM A. ZEIDLER.

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