US892995A - Scissors or shears. - Google Patents

Description

L. E. KENNEDY'.

SGISSORS 0R SHEARS. APPLICATION FILED DEc.z,19o

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PATENTBD JULY 14, 1908.

-LORNE EMERY KENNEDY, OF RUSSELL, MANITOBA, CANADA.

SGISSORS OR SI-IEARS.

Specification of Letters Patent.

Patented July 14, 1908.

Application led December 2, 1907. Serial No. 404,692.

To all whom it may concem- Be it known that I, LORNE EMERY KEN- NEDY, of the village of Russell, in' the Province oi Manitoba, Canada, clerk, have invented certain new and vuseful Im rovements in Scissors or Shears, of which t e following is the specilication.

The invention relates to improvements in scissors, shears, and the like, and the object of the invention is to provide a simple, durable, and inexpensive tension device, which may be adjusted from time to time, to cause the blades to move close together along their entire cutting edge Jfrom heel to point, and also to enable the blades tol work freely when swung wide' open.

It consists essentially in a ball carried by one of the blades and rolling on the other, and a spring and adjusting screw, the parts being arranged and constructed as hereinafter more particularly described.

Figure 1 is a top plan view of a 'pair of scissors supplied with my invention. Fig. 2 is an enlarged vertical cross sectional view through the heel of the blades, the section being taken in a plane, as denoted by the letters X X', Fig. 1. Fig. 3 is an enlarged vertical cross sectional view, taken throu h the scissors, at the positions denoted by t e line Y Y', Fig. 1. Fig. 4 is an enlarged detailed perspective view ofthe spring. Fig. 5 is an enlarged detailed perspective view of the ball.

In the drawings like characters of reference indicate corresponding parts in each figure.

1, 2, are blades of any preferred construction in their general outline.

3 is the ordinary screw, forming the pivotal point of the blades. f

In one face of the scissors, at the heel, is cut away a portion forming a longitudinal groove 4, slanting from the tips backwardly, and at the rear end of the groove a more or less hemispherical opening 5 is made directly through the heel forming a bearing for the reception of a ball 6, the ball being put in from the upper face of theshear. When the ball is in position it bears on the inner face of the shear 2, and in the movement of the blades, rolls on the lower blade.

7 is an arched spring, of a width and length suiiicient to conveniently pass within the roove, the one end resting on the top of A the all, and the other having an opening to receive the adjusting screw 8, which screws into the heel ofthe blade 1.

It will be noticed that the bend in the s ring and the slant bottom of the groove a lows for an adjustment to the outer end pressure of the spring by turning the screw 8. Tightening the screw forces the ball downwardly against the lower blade 2, and the ball being to the other side of the screw from the points, the blades are forced together along their complete cutting edge. According to the adjustment of the screw 8 so the pressure on the blades.

If the heel of the blades in the ordinary scissors be not wide enough to allow the ball to bear on the inner face of the under blade for the complete opening of the scissors when cutting, an additional side extension or lug can be formed at the heel to allow for it as shown at 9 in Fi 1.

It will be noticed that when the scissors are wide open, that is, further open than is usual in cutting, the ball is free of the heel, so that the blades can work freely. As the ball is free to roll there is considerable less friction than there would be otherwise.

I am aware that a ball has been used between the blades already, but in the form which has come under my notice its value is simply to reduce friction and impart easy motion to the blades. It is not in any manner used as the agency by which the pressure is adjusted between the blades.

What I claim as my invention is:

` In a device of the class described the combination with the blades held together by a pivot screw, one of said blades having a longitudinal groove in the heel thereof, the said groove being beyond the pivot screw from the tip of the blades and having an inclined bottom, of a ball within an opening passing from the groove to the under face of the blade, the said ball being adapted to operate on the opposing blade, a spring within the groove having its one end on the ball, and

Van adjustable screw passing through the other end of the spring into the heel of the blade, as and for the purpose specified.

Signed at Russell, in the Province of Manitoba, this 28th day of October 1907.

LORNE EMERY KENNEDY,

In the presence of- A. R. TINGLEY, ADA M. ROGERS.

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