US828302A - Tension attachment for shears. - Google Patents

Description

N0. 828,362. PATBNTED AUG. 14, 1906.

H. GLAUSS. TENSION ATTACHMENT POR SHEARS.

APPLICATION FILED JUNE 19I 1905.

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UNITED STATES PATENT OFFICE.

" TENSION ATTACHMENT FOR SHVEARS.

Specification of Letters Patent.

Patented Aug. 14, 1906.

Application iiled June 19, 1905. Serial No. 265,875.

To @ZZ whom, it may concern: i

. adjustin Be it known that I, HENRIE CLAUss, a citi- -zen ofthe United States, residing at Fremont, inthe county of Sandusky, State of Ohio, have invented certain new and useful full, clear, and exactdescription ofthe inven-v tion, such as will enable othersskilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the igures of reference marked thereon, which form a part of this specification.

This invention relates to a tension attachment for shears; and it consists in the construction and arrangement of parts hereinafter fully set forth, and pointed out particularly in the claims.

The object of the invention is to provide simple and efficient means for regulating or the tension on the blades of the shears, t e arrangement being such as to obviate any change of adjustment after it has been once eifected, the adjustment remaining undisturbed whether set tightly or loosely, enabling the shears to be operated as long as desired without any change-in the tension upon the blades.

The above object is attained by the structure illustrated in the accompanying drawings, in which- Figure 1 is an elevation of a pair of shears with my improved tension attachment mounted thereon. Fig. 2 is an enlarged transverse section through the attachment and shear-blades as on line 2 2 of Fig. 1. Fig. 3 is a perspective view of the looped metal strap which embraces the blades and receives the screw-bolt upon which they are lpiyfoted. Fig. 4 is a perspective view of said Referring to the characters of reference, 1 and 2 designate the blades of the shears, which are apertured, as at 3, to receive the pivot-bolt 4. Said bolt is provided with a rounded head 5 and with a threaded stem in which is formed a longitudinal channel 6. Embracing the blades of the shears is a loop 7, which may be made of spring metal to eX- ert a slight pressure against the outer faces of the blades to normally hold them together. The terminals of said loop are enlarged, as at 8 and 9. Formed through terminal 8 is an aperture 10, around which aperture the metal is depressed to afford a countersink for the Vconicalinner face illfofy the head 5. In

the opposite terminal 94 of. said loop is ,an aperture 12, adapted to receive the opposite end of the bolt 4, and projectingv into said ap- .erture is a tongue 13, adapted t0 `engagein the slot 6, whereby the bolt is locked ,to-:the metal loopand is held from `rotating independently thereof. Screwedl upon .the projecting end of the bolt 4 is a knurlednut14, which bears against the end portion 9 of the loop 7 and by means of which any desired tension may be placed upon the blades of the shears. By countersinking the metal of terminal 8 around the aperture 1() an inwardlyprotruding cone 15 is formed, which enters the reamed outer opening of the shear-blade 1, as shown in Fig. 2, whereby the screw-bolt is centered in said openin and a cone-bearing-is afforded for said b ade. The bolt 4 passes freely through the apertures of the blad es, so that when the nut 14 is tightened, so as to crowd the blades together, an equal bearing against the outer faces of the blades is effected, and consequently an equal tension is applied thereto. Because of the fact that the tongue 13 engages in the slot in the bolt 4 said bolt and tongue are locked together. The terminal 9 of the loop serves as a washer against which the nut 14 binds, and because of the facty that there is no movement between the washer and bolt the movement of the shear-blades, which are free upon the bolt, cannot disturb the adjusting-nut, so that any desired degree of tension may be maintained. The loop 7, which embraces the shear-blades, allows a limited turning movement of the bolt within the blades; but said loop is arrested by contact with the blades when turned into engagement therewith, thereby enabling the nut to be screwed onto and off. of the bolt to vary the tension as desired.

Having thus fully set forth my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A tension attachment for shears, comprising a looped member adapted to embrace the blades, a bolt passing freely through the blades and through said member, said bolt being locked to the lattery to prevent independent rotation, and an adjusting-nut upon said bolt screwed into contact with one terminal of said member.

2. In a tension attachment for shears, the combination with the blades, of the loop embracing the blades, having apertured terminals, one of which is irregular, a bolt passing through the blades and through the terminals of said loop, said bolt having an irre ular formation at one end to iit the irregu ar aperture in the terminal of the loop to revent independent rotation of the bolt, an an adjusting-nut upon said bolt screwed into contact with one terminal of said loop.

3. In a tension attachment for shears7 the combination with the blades having registering apertures therethrough, a loop embracing the blades having aperturedterminals, a bolt passing through the terminals of the loop and through the blades, said bolt having a channel in its threaded end, a ton ue projecting into one of the apertures of the loop and lying in said channel, and an adjusting-nut upon said bolt.

HENRIE CLAUSS.

Witnesses:

ARTHUR STULL, B. H. ADLER.

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