US1987935A

US1987935A - Scissors and the like

Info

Publication number: US1987935A
Application number: US583218A
Authority: US
Inventors: Charles H Herrick
Original assignee: Individual
Current assignee: Individual
Priority date: 1931-12-26
Filing date: 1931-12-26
Publication date: 1935-01-15
Anticipated expiration: 1952-01-15

Description

Jan. 15, 1935. H HERm'K 1,987,935

SCISSORS AND THE LIKE Filed Dec. 26, 1931 I'IIIIIIIIW ||1'IIIn /2 Patented Jan. '15, 1935 UNITED STATES PAT Eur OFFICE My invention relates to scissors, shears and the like, and it has for its object to provide an improved device of this class. To this end I have provided a scissors or shears wherein the two 5 blades are pivotally connected by means of a pintle that is interlocked with one of said blades so as to be held against rotating relatively thereto. One end of this pintle is threaded and has mounted upon it a nut disposed alongside of the blade that is interlocked with said pintle and between this nut and the adjacent blade is arranged a spring which surrounds and is concentric with the axis of the pintle. The nut is locked'against accidental rotative displacement on the pintle by means that is connected with said adjacent blade. By adjusting the nut on the pintle the pressure of the spring against said adjacent blade may be varied and regulated to suit the user of the scissors or shears and it is also a feature of the invention that the nut is removable so that the two blades may be quickly taken apart, sharpened and reassembled when desired.

Other features of my invention are hereinafter pointed out.

In the accompanying drawing:

Figure 1 is an elevation of a scissors constructed in accordance with my invention.

Figure 2 is an end view of the pintle hereinafter described.

Figure 3 is a section on line 3-3 of Figure 1.

Figure 4 is a side elevation of a portion of one of the blades of the scissors shown in Figure 1.

The embodiment of my invention herein illustrated comprises two

blades

10 and 11 provided, respectively, with

handles

12 and 13. Intermediate its ends the blade 10 is made with a circular aperture within which is rotatably mounted the cylindrical head 14 of a pintle 15. An intermedi-' ate portion of the pintle 15 is made square in cross section as illustrated at 16 and occupies a square aperture 17 provided through the blade 11. It will therefore be clear that the pintle is interlocked with the blade 11 so that it cannot turn relatively theretowhile the blade 10 is free to swing on the pintle 15.

The pintle 15 projects beyond the blade 11 and is threaded to receive upon it a nut 18 that is formed upon its inner face with a circular recess 19 occupied by one end of a coiled spring 20. The

opposite end of the coiled spring 20 occupies a circular recess 24 providedupon the outer side of the blade 11.

It will be clear that by rotatively adjusting the nut 18 on the pintle l5,the compression of the tightly into the socket 22.

- to compensate for wear of the blades.

spring 20 may be varied and regulated thereby to regulate the pressure of the blade 11 against the blade 10.

As shown in Figs. 1 and 3, the nut 18 is in the form of a disc having a circular series of apertures 5 or holes 21 extending therethrough adjacent to its periphery and concentric with the axis of the pintle 15.

When the nut 18 is rotated on the pintle 15 the holes 21 are successively brought into register with a threaded socket 22 provided in the outer side of blade 11 to receive the threaded stem of a thumb screw 23. After the nut 18 has been rotatively adjusted on the pintle to compress the spring 20 to the desired degree, the screw 23 is shoved through one of the holes 21 and screwed In this way the nut 18 is positively locked and held in its adjusted position.

The screw 23 is readily removable when nut 18 is to be adjusted, or when the blades are to be taken apart for sharpening.

The above described construction has the advantage that the degree of frictional engagement between the two blades can be varied or regulated to suit the strength of the hand of the user or It is also an advantage to the above described construction that the blades may be readily taken apart when they are to be sharpened, and during the operation of sharpening each blade it is unencumbered with the other blade and can be manipulated with greater ease and accuracy than is possible where the two blades are permanently connected.

It is desirable that the nut 18 be normally disposed close to the blade 11 and by providing its inner side with a recess 19 such as described a larger spring can be interposed between the blade and nut than would be possible in the absence of the recess. Also by providing a complementary recess in the outer side of blade 11 a much larger spring may be employed than would be possible with the recess 19 only. However, it is 45 not essential with this feature of my invention that both recesses be employed.

Scissors and shears have heretofore been con- I structed in such manner that when it was de- What I claim is:

A scissors or shears comprising a pair of blades formed with registering apertures for the reception of a pivot pintle, the aperture of one blade being of circular shape as viewed endwise, and the aperture of the other blade being of noncircular shape as viewed endwise; a, pivot pintle extending through said apertures provided at one end with a head abutting the blade formed with the circular aperture within which latter said pintle is rotatably mounted and having its opposite end portion enteriorly threaded and extending beyond the other blade, said pintle having an intermediate portion that is non-circular in cross section and fitted within the non-circular aperture of said last-mentioned blade; a thumb nut mounted upon the threaded end portion of said pintle closely adjacent to said last mentioned blade; a helical coiled spring surrounding said pintle between said thumb nut and the proximate blade one end portion of said spring 00- cupying a circular groove formed in said last mentioned blade and the other end portion of said spring occupying a circular groove formed upon the inner side of said thumb nut; a thumb screw having its threaded shank occupying a threaded hole provided in the outer side of said last-mentioned blade in proximity to said thumb nut and having a head providing a shoulder that is forcibly set against the marginal portion of the outer face of said nut to cramp the latter on the threaded portion of said pintle thereby to cause said nut and thumb screw to mutually hold each other against accidental rotative displacement.

CHARLES H. HERRICK.