US911680A - Shears. - Google Patents

Description

L. P, REGAN.

. SHBARS.

' APP LIOATION FILED JULY 20, 1908.

911,680 Patented Feb;9,1909.'

-- Ihlll UNITED STATES. PATENT onnion.

' LEVI F. REGAN, on war-Kan, sneaks;

Specification of Letters Patent;

rates-ad Feb. 9. 1909.

Application as July 20, 1905, an 1a.'444,47.

To all whom. it may concern:

Be it known that I, LEVI'F. REGAN, a citizen of the United States, residing at Walker," 1n the county of Cass and State of Minne 'sota, have invented certain new and useful spring adapted to e interposed between the blades of such an implement in rear ofits pivot so as to throw t e cutting edges of the lades against each other throughout their entire len th during the working of the blade and to ta e up lost motion and looseness at the ivot.

T e object of the invention is to provide an automatic tension spring ofthis character which will be simple, strong, durable, inexpensive and highly effective 1n accomplishing its intended purpose.

With the above and other objects in View, the invention consists of thfe novelfeatures of construction and the combination and arrangement of parts hereinafterfully described and claimed, and illustrated in the accompanying drawings, in which Figure 1 is a side elevation of a pair of shears in their open position and having the invention applied thereto; Figs. 2 and 3 are sectional views taken, respectively, on the planes indicated by the lines 2-2 and 3-3 in Fig. 1; Fig. 4 is an enlarged perspective view of the spring; and Fig. 5 is a detail view of a portion of the blade having the cavity.

In the drawings 1 and 2 denote two blades of a pair of shears, scissors or similar cutting implement, said blades being united by a suitable pivot 3. 4

4 denotes a cavity formed in the inner face of the blade 1 in rear of the pivot 3 and 5 denotes a leaf spring secured in said cavity and adapted to bear against the inner face of the other blade 2 soas to effect a cushion or spring bearing between the cutting edges of e blades and to cause said cutting edges to contact each other throughout their entire length during the working of the blades, and

v also to take .up lost motion or looseness at the pivot joint. The cavity 4 is substantially rectangular in shape and extends at an angle or diagonally across the blade 1, its walls at one end being undercut, as shown at 6, to receive the beveled edges of the end -blade 2.

7 of the spring.- This end 7 is flat and of dovetail-shape in cross section so as to slide between the undercut wall 6 atone end of the cavity 4 and it is adapted to be retained in said end of the latter by a small screw or other fastening 8. The free end 9 of the spring is curved longitudinally from the portion 7 to its extremity and it' is adapted to project partially out of the cavity 4 and to bear against the inner face of the The edgesof the end 9 of the spring are beveled, as shown at 10, so as to reduce friction. By arranging the cavity as shown and providing the lmproved spring therein, it will be seen that the latter Wlll be out of sight and out of the way and will be securely retained" inposition and there will be no liability of it working loose. spring is entirely automatic and efieetively maintains the cutting. edges of the blades in contact throughouttheir entire length durin the working of thablades and effectively ta (es ulplost motion and looseness at thepivot, t iereby causing the blades to cut more effectively and dispensing with the necessity of frequently grinding the blades. The

The

spfring not only renders the scissors more e ective, but renders them to some extent self sharpening and .ermitsthem to cut as readily far from as c ose to. the pivot 'oint. When once the spring is a plied to the s ears there will be no necessity or adjustment as is the case with other devices provided to accomplish the purpose of this invention.

Having thus described the invention what is claimed is:

1. The combination with a pair of shears or similar cutting implement, one of the blades thereof having a cavity in'its inner face in rear of its pivot, of a leaf spring having a fiat end arranged 'in one end of the cavity'and a curved end to bear a ainst the inner face of the other blade anga screw passed'through the flat endof the spring and into the bottom of said cavity, the head of said screw being countersunk in the flat end of the spring.

2. The combination with a pair of shears or similar cutting implement, one of the blades thereof having the cavity 4 in its inner face in rear of its ivot, said cavity having at one end the un ercut walls 6 and in its bottom a screw threaded socket, of the leaf. spring 5 having the flat end 7 with beveled walls to enga e the undercut walls 6 of the cavity 4 in the blade, said end.7 being Q en ese also formed with'en aperture to register with the threaded socket 1n the bottom of said cavity, the other end at said spring being curved longitudinally and adapted to bear against the'inner face of the 0 posing blade and a screwpassed through t e aperture in the fiat end of the s ring and into the threaded socket in the ottom of the cavity 4-, substantially specified.

In testimony whereof I hereunto niiix my signature in the presence of two witnesses.

LEVI F. REGAN.

as mid fer the purposes Witnesses:

ARTHUR A. OLIVER F. B. DAVIS.

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