US905898A - Tool-holder. - Google Patents

Description

P. B. E. MARBLE da A. HAMMAR.

` Toor. HOLDER.

APPLICATION FILED JUNE 27, 1907.

Patented Dec. 8, 1908.

UNITED sTATEs PATENT oEEioE.

FREDERICK E. E. MARBLE AND CARL A. HAMMAR, OF WORCESTER, MASSACHUSETTS.

TOOL-HOLDER.

Specification of Letters Patent.

Application led June 27, 1907.

Patented Dec. 8, 1908.

Serial No. 381,052.

To all whom it may concern.'

Be it known that we, FREDERICK E. E. MARBLE and CARL A. HAMMAR, citizens of the United States, residing at Worcester, in the county of Wvorcester and State of Massachusetts, have invented a new and useful Tool-Holder, of which the following is a specification.

This invention relates to a tool holder which is especiallv adapted for use to hold drills for metal wor ring purposes, but is capable of general use.

The principal objects of the invention are to provide means whereb a tool holder of this kind which is capab e of being set to drill at an angle, can be provided with means for feeding the tool as the shaft rotates, which means may readily be thrown out of operative connection so that the tool may be fed by hand or operated without feeding, as may be desired.

Another object of the invention is to conneet the feeding means with means for adjusting the angular position of the shaft in such a way that the bearing for the shaft may provide means for guiding the tool as it is fed.

Further objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accom anying drawings which illustrate a pre erred form of the invention and in which,

Figure 1 is a side elevation of said preferred form showing the use of the same for drilling at an angle and feeding the drill forward as it rotates, showing in dotted lines another position of the parts, and Fig. 2 is an elevation at right angles to Fig. 1.

The drawings show a shaft 10 which is adapted to be placed in a chuck of an ordinary drilling machine n the usual manner. On this is mounted a bearing 11 which is provided with a segmental arm 12. This shaft is connected by a double Hookes joint or other flexible connection 13 with a shaft 14 mounted in a bearing 15 which has a segmental arm 16 thereon provided with a curved slot 17. The Hooke s joint is made u of a series of links connected preferably by fil ister head screws 18 so that the two shafts may be mounted at an desired angle to each other and motion wi l be transmitted from one to the other in a comparatively frictionless manner. In order to hold these shafts at any desired angle, a bolt 19 is passed through the slot 17 and mounted on the end of the arm 12 and this isV provided with a thumb screw 20 by the tightening of which the two shafts may be held at any desired angle.

In order to provide for feeding the tool forward with the rotation thereof, the shaft 14 is provided with a worm 21 and is made hollow. Within the shaft 14 is mounted a second shaft 22 having a key way 23 engaging a key or projection within the shaft 14, not shown, so as to guide the shaft 22 to move longitudinally and to cause the same to rotate with said shaft 14 and worm.

Preferably connected with the bearing 15 is an arm 25 which is provided with a slot through which asses a screw 27 mounted on a frame 30. T 's frame is provided with a tubular guide 31 surrounding the worm and this, together with the longitudinal slot in the arm 25 serves to guide the frame longitudinally: The frame is also provided with a bearing 32 through which the shaft 22 passes, the same being rovided with collars 33 on either side of the earing fixed to the shaft so that the frame will move with the shaft.

On the frame is mounted a screw-threaded stud 34 on which is loosely mounted to rotate a worm wheel 35 with friction disks 36 on both sides of the same. A casing 37 is mounted on the stud having projections 38 extending through perforations in the frame to hold it in osition. A thumb nut 39 is mounted on t e outside of the casing and is adapted to be turned up to press the friction disks closely against the worm wheel to hold the same from rotating. When this is done, the rotation of the worm 21 with which the worm wheel meshes, serves to feed the fixed worm wheel together with the frame and the shaft 22 longitudinally so that the tool 42 which is mounted in a chuck 43 or the like on the shaft 22 will be fed regularly with the rotation of the shaft. The slot in the arm 25 limits the feeding motion and at the same time serves to guide the frame together with the bearings 31 and 32.

When it is desired to operate without automatic feed, the thumb screw 39 is loosened and the handle 44 on the frame may be used to ad`ust the frame. lf desired, the screw 27 may e tightened up so as to hold the frame at any desired point in its traverse.

It will be seen, therefore, that the device may be adjusted by hand to work at any desired distance, within the limits of its capacity, from the center of the main shaft, and that it can be adjusted in a very simple and -convenient manner to feed automatically;

respect to the bearings on the main shaft, theV frame is caused to move absolutely in alinement with the shaft.

While we have illustrated and described a preferred embodiment of the invention, We are aware that many modifications may be made therein without departing from the scope of the invention as expressed in the claims.

Therefore, we do not Wish to be limited to the particular form shown, but what we do claim is l. In a tool-holder, the combination with two shafts, flexible means for connecting them together, a segmental arm connected with one of said shafts, means adapted to be secured at any point along said arm for holding the other of said shafts at any desired angle thereto, and means for feeding a tool supported by said arm and comprising a worm-wheel, of means for fixing said wormwheel to prevent the rotation thereof, means for connecting the worm-wheel with a tool chuck splined to one of said shafts, and a worm on the last named shaft meshing with said worm-wheel.

2. In a tool-holder, the combination of a hollow Ishaft having a worm thereon, a shaft inside said hollow shaft having means whereby it will be rotated by s aid hollow shaft, said second shaft being slidable in the hollow shaft, a frame connected with the second shaft, and a worm-wheel mounted on said frame and meshing with said worm.

3. In a tool-holder, the combination with a hollow shaft, an inner shaft mounted to slide with respect to the hollow shaft and to turn therewith7 said inner shaft being adapted to support a tool chuck or the like, a frame connected with said inner shaft to slide therewith, and means on the hollow shaft for feeding said frame and inner shaft as the hollow shaft is rotated. l

4. In a tool-holder, the combination with a hollow shaft, an inner shaft mounted to slide with respect to the hollow shaft and to turn therewith, said inner shaft being adapted to support a tool chuck or the like, a frame connected with said inner shaft to slide therewith, and means connected with said frame and hollow shaft for feeding said frame and inner shaft as the hollow shaft is rotated, which readily can be thrown out of coperative relation with said hollow shaft to avoid the feeding of the inner shaft.

5. The combination of a hollow shaft, an inner shaft mounted to slide with respect to the hollow shaft and to turn therewith, a non-rotatable frame connected with the inner pivoted on an axis transverse of the direction of movement thereof, a friction disk connected with the frame and engaging said wheel, means for tightening and loosening the disk with respect to the wheel and means engaging the wheel at its periphery constructed and adapted to convert the rotary moti-on of the hollow shaft into sliding motion of the frame when the disk is tight or rotary motion of the wheel when the disk is loose.

6. A tool-holder, comprising a rotatable member having a worm thereon, a slidable member adapted to turn with the rotatable member, a worm wheel meshing with the worm and connected with the slidable member to slide therewith, and means for xing the worm-wheel with respect to the slidable member to prevent the worm-wheel from rotating, said slidable member being rotatable independently of said Worm-wheel and of said fixing means. v

7. A tool-holder comprising a rotatabl member having a worm thereon, a slidable member adapted to turn with the rotatable member, a worm-wheel meshing with the worm and connected with the slidable member, means for fixing the worm-wheel to the slidable member to prevent it from rotating, a bearing for said rotatable member, and a guide for the slidable member fixed to said bearing.

8. A tool-holder comprising a bearing, a rotatable member passing through said bearing and having a worm thereon, a slidable member adapted to rotate with the rotatable member, a frame constituting a part of said slidable member constructed and arranged to slide therewith, said slidable member being rotatable independently of said frame, a worm-wheel on said frame meshing with said worm, a friction disk mounted on said worm-wheel and casing, means for tightening said friction disk against the wormwheel to prevent its rotation, and a guide mounted on said bearing for said frame.

9. A tool-holder comprising a rotatable member, a slidable member supported thereby, and having means cooperating with the rotatable member for transmitting a motion of rotation from the rotatable member to the sliding member and for permitting the sliding member to slide independently of the rotatable member, and means comprising a sliding frame supported by said members and operatively connected with the rotatable member for transmitting the motion of rotation from the rotatable member to feed along the sliding member, said sliding member having means for mounting a tool thereon.

10. A tool-holder comprising a rotatable member, a slidable member supported thereby, a guide su ported by said rotatable member for the s idable member, and means shaft to slide therewith, awheel on the frame 1 supported by and connected with said rotatable members for transmitting a motion of rotation from the rotatable member to the slidable member and for permitting the slidable member to move longitudinally with respect to the rotatable member.

11. A tool-holder comprisin a rotatable member, a bearing therefor, a s idable member comprising a frame, and having means coperatlng with the rotatable member for causing the slidable member to rotate with the rotatable member and ermitting it to slide with respect thereto said frame having a tubular guide surrounding said rotatable member and said bearing having a uide extending longitudinally of the rotatable member, and engaging the frame to guide it, a handle on the frame, and means for transmitting motion of rotation of said rotatable member to said frame to slide the latter.

12. In a tool holder, the combination of two shafts, a flexible joint connecting said shafts, a bearing for each shaft at the adj acent ends thereof, means for securing said shafts in adjusted angular positions comprising a clamping device connected with one bearing, and an arm rigidly mounted on the other bearing to which the clamping device may be secured, means on one of said shafts for sup orting a tool, and means rigidly supported) by the bearin on said too supporting shaft extending along said toolsuplporting shaft and connected with said too supporting means for feeding the tool alono' said tool-supporting shaft as it is rotated by the other shaft.

In testimony whereof we have hereunto set our hands, in the presence of two subscribing witnesses.

FREDERICK E. E. MARBLE. CARL A. HAMMAR.

Witnesses:

ALBERT E. FAY, M. E. REGAN.

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