US1096152A - Adjustable taper-pin box-tool. - Google Patents

Description

T. W. CHAPMAN. ADJUSTABLE TAPER PIN BOX TOOL.

APPLICATION FILED JAN.9,1911.

Patented May 12, 1914.

Ems/via)" Tie/-01 CZA U a COLUMBIA PLANOGRAPH c0., WASHINGTON. n c.

UNITED STATES PATENT @FFTQE.

THERON W. CHAPMAN, OF IBELVICDERE, ILLINOIS, ASSIGNOR TO NATIONAL SEWING MACHINE COMPANY, OF BELVIDER-E, ILLINOIS, A CORPORATION OF ILLINOIS.

ADJUSTABLE [PAPER-PIN BOX-TOOL.

Specification of Letters Patent.

Patented May 12, 1914.

' '0 all whom it may concern:

Be it known that I, THERON W. CHAP- aux. a citizen of the United States, residing at Belvidere, in the county of Boone and State of Illinois, have invented certain new and useful Improvements in Adjustable Taper-Pin Box-Tools, of which the following is a specification.

This invention relates to a taper pin box tool more particularly described as a devlcc for a turret lathe, and the principal object is to provide a tool of this character for attachment in the lathe to turn taper pins from bar stock.

Another object is to provide a cutting tool of this character which moves deeper in the work as the holder is advanced and quickly and automatically withdraws the tool when the direction of motion of the holder is reversed.

Another object is to provide improved bearing stops for centering bar stock.

Another object is to provide a device of this character which shall be easily and readily adjustable.

Other objects will appear hereinafter, the novel combination and arrangement of the parts being set forth in the claims. 7

In the accompanying drawings Figure 1 is a plan view of my invention showing a holder in position against an inclined fixed rest. Fig. 2 is an end view of the same. Fig. 3 is a side view showing the position of the attachment, and Fig. 1 is a view showing the position and location of one of the bearing stops.

Referring now more particularly to the drawings, the holder 10, provided with a bored projection 11 with which the holder is adapted to be secured in a turret head, is also provided with an end projection 12 in which is an opening 13. The bar stock from which the taper pins are to be out projects through this opening 13 in the end projection 12 and is centered by means of centering devices 1%. These centering devices comprise an adjustable screw 8 which bears against a slotted L-shaped member 9 whlch in turn bears against the material to be cut designated in the drawing by the numeral 15. This holder 10 is formed with dove-tailed grooves 16 (Fig. 3) in which the tool mount 17 is adapted to slide transversely of the holder. The tool mount is provided with a holder 20 for the tool 18 and an adjusting screw 19 bears against the end of the tool to vary the positionthereof. At the side of the holder 10 is a perforated lug 21 through which the rod 22 extends. This rod 22 is adapted to pass freely through an opening 23 in the tool mount 17 and is provided with a threaded end to secure it in the bottom of the said opening 23. At the other end of the rod which extends through the lug 21 are the lock nuts 21 and positioned about the rod 22 in the opening 23 is the spring 25 which bears against the lug 21 and the tool mount 17 tending to force the latter away from the lug and the cutter 18 held by the tool mount away from the cutting position. The movement in this direction is limited by the position of the lock nuts on the rod 22 which strike against the lug 21 when the tool mount is moved too far. At the other side of the tool mount is a slotted lug 26 in which is pivoted the irregular dog 27. This dog 27 bears against the inclined rest 28 which is adapted to be secure-d to the bed of the lathe and is fixed with respect to the holder 10. This inclined rest is provided with slots 29 and adjusting screws 30 by means of which, in connection withthe securing means 31, the inclination of the rest may be changed to any desired angle. The irregular dog is formed with two bearing points or planes 32 and 33. These points and 33 are so disposed with respect to the pivotal mount-- ing 34. that the bearing point 32 engages the inclined rest 28 when the holder 10 is moved in one direction, the tool mount 17 which carries the dog being pressed toward the rest 28 by the spring When, however, the direction of motion of the holder 10 is changed the dog 27 is turned in such a manner that the point or plane 33 bears upon the rest 28. The distance of this plane from the pivotal mounting 3 1 is less than that of the bearing point 32 and when the dog is turned to bear upon this plane 33, the spring 25 operates to press the tool mount 17 in the direction of the rest. It will thus be seen that as the holder 10 advances, the tool 18 is pressed into the bar 15 in accordance with the inclination of the rest 28. When the holder 10 is withdrawn the tool mount 17 is thrust back and with it the tool 18 to clear the bar 15. The dotted outline 10 shows the position of the holder, and 17 shows the position of the tool mount when the holder is Withdrawn. It Will also be noted that the bar 15 is held in a central position against the deflecting influence of the cutting tool 18 regardless oi the depth of the out. When the taper pin is longer than the Width of the tool mount 17 it may extend into the bored-out opening 11 in the projection 11.

hat I claim as new is- 1. In a taper pin cutting device, the combination of a longitudinally movable holder, a tool mount transversely slidable in the holder, a perforated projection on the edge of the holder, a threaded pin With one end secured to the tool mount and freely mo 'ahle through the said perforation, look nuts at the other end of the pin constituting a stop limit for said tool mount, an annular opening in the tool mount about the body of the pin, and a coil spring surrounding the pin in the annular opening and bearing against; the said projection and the tool mount.

2. In a taper pin cutting device, the combination of a longitudinally movable holder, a tool. mount transversely slidable in the holder, an adjustably mounted inclined guide fixed with respect to the tool mount, a slotted lug projecting from the tool mount, and a freely movable irregular dog pivoted therein and having one bearing surface against said guide when the holder is moved in one direction and another bearing surface when it is moved in the opposite direction, said surfaces being at difi'erent distances from the pivotal point.

In testimony whereof I hI/UG signed my name to this specification, in the presence of tWo subscribing Witnesses, on this 28 day of December A. D. 1910.

THERON W. CHAPMAN.

\Vitnesses:

C. B. Arwoon, JOHN ELonnnoE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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