US802831A - Shear-gage. - Google Patents

Description

No. 802.831. PATEN'I'ED OCT. 24, 1905. T. STEVENTON.

SHEAR GAGE.

APPLIOATION HLED APR.25, 1905.

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Specification of Letters Patent.

Patented. Oct. 24, 1905.

Application filed April 25, 1905. Serial No. 257,357.

To all whom it may concern:

Be it known that l, THoMAs S'rnvnNToN, a citizen of the United States of America, residing at Bridgeport, in the county of Fairfield and State of Connecticut, have invented new and useful Improvements in Shear- Gages, of which the following is a specification.

This invention relates to shear and scissors gages of the type disclosed in Letters Patent No. 771,678, granted to me October 41;, 1904, and has for its objects to provide a simple inexpensive device of this character in which the gage may be readily adjusted, one wherein. the gage member may be readily and securely fixed in its adjusted positions, and one in which the construction disclosed in my prior patent is generally simplified and improved, thus reducing the cost of manufacture and rendering the device more efficient in operation.

To these ends the invention comprises the novel features of construction of parts more fully hereinafter described.

In the accompanying drawings, Figure 1 is an edge view, partly in section, of a pair of shears equipped with a gage embodying the invention. Fig. 2 is a plan view of the same. Fig. 3 is a detail view, on an enlarged scale and partly in section, of the blade-connecting rivet and adjacent parts. y

Referring to the drawings, and particularly to Figs. 1 and 2, 1 designates a pair of shears of the usual construction and material and comprising blades 2 and 3, equipped with panels Ll, said blades being connected, as usual, by means of a pivoting member or screw 5. The screw 5 in accordance with my invention has its body portion threaded at 6 throughout a portion of its length for engagement with the opening in one of the shear-blades and is provided with a reduced threaded extension 7 of conical or tapered form and split longitudinally, as at 8, thus producing a pair of relatively compressible clamping portions or sections. Slidably disposed within an opening 10, formed centrally through the screw 5 and its extension 7, is a gage member 11, preferably composed of wire and provided with graduations 12, said gage comprising a right-angularly-disposed arm or portion 13, adapted to extend in a plane substantially parallel with the plane of the side faces of the shear-blades,

there being threaded onto the tapered extension 7 a clamping member or nut 14, having a linurled marginal edge and operable for compressing the portions or sections 9 to clamp the gage-arm 11 firmly in its adjusted positions.l

In practice the arm 13 serves as a guide to facilitate the accurate cutting of cloth into strips and for properly spacing buttonholes and may be adjusted for strips of varying widths or to accord with the desired distances between the buttonholes by moving the stem or shank 11 longitudinally through the screw 5, it being apparent that such movement of the gage may be accurately determined by the graduations 12 and the gage thereafter securely fixed against movement through the medium of the nut 14 acting upon the compressible portions. Tt is to be observed in this connection that the opening in the clamping-nut which receives the extension 7 is tapered correspondingly with the latter and that the screw 5 may be manipulated for setting or tightening the blades.

From the foregoing it is apparent that I produce a simple device in which the clamping or releasing of the gage-stem may be readily effected and one wherein the stem will when the parts are in clamping position be securely fixed against movement, it being understood. that minor changes in the details of construction herein set forth may be resorted to without departing from the spirit of the invention.

Having thus described my invention, what I claim is-u As a new article of manufacture, a pivoting-screw comprising a head and a screwthreaded shank, a distinct externally-threaded tapered extension provided at the outer end of said shank, said screw having an opening formed axially therethrough and through the extension. and the latter having its walls split longitudinally to produce coacting spring-sections, and a clamping-nut having a tapered opening to receive said extension and internally threaded for engagement with the latter'.

In testimony whereof I afiix my signature in presence of two witnesses.

v l THOMAS STEVEN TON.

Vitnesses C. K. BLAKESLEE, A. G. SMITH.

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