US 881890 A
Description (OCR text may contain errors)
GEORGE T. BARR, OF WAGO, TEXAS.
BUTTONI-IOLE CUTTER OR SHEARS.
Specification of Letters Patent.
Application filed. October 16, 1907.
Patented March 17, 1908.
serial No. 397,710.
To all whom 'it may con/cern:
Be it known that I, GEORGE T. BARR, a citizen vof the United States, residing at Waco, in the county of McLennan and State of Texas, have invented certain new and useful Improvements in Buttonhole Cutters or Shears, of which the following is a specifica-v tion, reference being had to the accompanying drawings.
My invention relates to improvements in button hole cutters or shears and more particularly to an improved adjustable stop device for regulating the cutting action of the blades whereby button holes of different lengths may be cut.
The object of the invention is to provide an adjustable stop or regulating means of this character for the pivoted arms or members of button hole cutters, shears and similar instruments or tools, which will be simple and inexpensive in construction, strong and durable 'in use and convenient and easy to operate. With the above and other objects in view, the invention consists of the novel features of construction hereinafter described and claimed, and illustrated in the accompanying drawings, in which Figure 1 is a perspective view of a button hole cutter provided with my improved stop device; Fig. 2 is a front elevation of the same, parts being in section; Fig. 3 is a detail section taken on the plane indicated by the line 3--3 in Fig. 2 and Fig. 4 is a detail section taken on the plane indicated by the line 4-4 in Fig. 3.
In the drawings 1 denotes a button hole cutter or shears of well known form consisting of two arms 2, 3, pivotally connected at 4 and having finger pieces or loops 5 at one end and co-acting cutting blades 6 at the opposite end. The blades 6 are of the usual form and are preferably arranged at right angles to the plane. of the arms or members 2, 3, so that vertical button holes or button holes which are parallel with the edge of the button hole fia may be conveniently and easily cut as wil be readily understood.
My improved means for varying and limiting. the cutting action of the blades comprises a stop screw 7 and an operating wheel 8. These parts are arranged in an enlarged portion 9 which is formed upon the inner edge of the arm 2 and adapted to enter a similar shaped recess 10 formed in the corresponding portion o'f the other member 3,
when the two parts are brought together to close the blades. In the enlargement 9 is formed an angularly arranged notch or slot 10a adapted to receive the wheel 8 so as to allow the latter to rotate freely therein. In said portion or enlargement 9 is also formed an angularly arranged hole oropening 11 which intersects the slot 10 adjacent to its center and which has its inner portion screw threaded as at 12.
The aperture or opening 11 is adapted to receive the screw 7, the threads of which engage the threads 12 in said opening as clearly shown in Fig. 2. Upon one or more points on the stop screw are formed longitudinally extending iiat faces 13 adapted to be engaged by similar fiat faces formed in an aperture 14 in the wheel through which aperture the screw projects and in which it is adapted to freely slide. The provision of the flat faces 13 on the screw and the elongated aperture or opening 14 in the wheel causes the screw to turn with the wheel and at the same time slide longitudinally therein as it travels through the aperture or opening 11. The wheel 8 has its periphery milled as shown at 15 and its diameter is greater than the width of the armor member 2 so that it projects beyond the opposite faces of the latter and may be readily-rotated between the thumb and the first finger. In order to prevent the screw from being turned or run out of the aperture 11 I head or upset its ends as shown at 16.
In use the stop screw 7 is first adjusted by rotating the wheel 8 and the device is then taken in hand and manipulated in the usual manner. By rotating the wheel in one direction the screw may be moved inwardly and in the opposite direction` it may be moved outwardly so that its inner end may be positioned at a greater or less distance from the inner edge of the arm or member 2 to limit the movement of the other arm or member 3 toward it and hence to limit the closing movement of the blades 6.
From the foregoing it will be seen that the construction disclosed is exceedingly simple so that it may be produced at a comparatively small cost and will be durable in use and convenient to operate. The stop screw may be readily adjusted by simply rotating the wheel which can be quickly and easily done.
While I have shown and described my invention as applied to a button hole cutter, it
will be understood that it may be applied to a pair of shears, scissors or a similar instrument or tool in which it is desired to limit the closing movement of its arms or members.
Having thus described my invention what I claim is:
In a device of the character described, the combination of a pair of pivotally connected arms or members, one being formed in its inner edge with a slot and with an intersecting opening, the latter having a screw threaded portion, a stop screw arranged in said opening and engaged with the threaded portion of the same and formed with longitudinally extending flattened portions or faces, a Wheel arranged in said slot and hav- GEORGE T. BARR. Witnesses G. B. GURLEY, J. M. BRECKINRIDGE.