US666696A

US666696A - Metal-working machine.

Info

Publication number: US666696A
Application number: US3212000A
Authority: US
Inventors: Joseph B Renshaw
Original assignee: Individual
Current assignee: Individual
Priority date: 1900-10-05
Filing date: 1900-10-05
Publication date: 1901-01-29
Anticipated expiration: 1918-01-29

Description

No. 666,696. Patented 1an. 29, |9o|.

J. B. nENsHAw.

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(Application led Oct. 5, 1900.)

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METAL-WORKING NIACHIN.

SPECIFICATION forming part of Letters Patent No. 666,696, dated January 29, 1901.

Application filed October 5, 1900. Serial No. 32,120. (No model.)

T0 all wwnt t may concern:

Be it known that I, JOSEPH B. RENsHAw, a citizen of the United States of America, and a resident of Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Metal-Working Machines, of which the following is a specification.

This invention relates to metal-working machines, and more especially to drilling-m achines, and has for its object the provision of a device in which the drill or other cuttingtool may be automatically fed into the work for a certain distance.

My invention has,furthermore,for its object the provision of means whereby the force which is applied against the tool may be varied or graduated as desired and according to the various sizes of tools and to conform to the different kinds of material to be operated upon.

My invention includes as one of its features a thrust-step in cooperation with the toolcarrying spindle of the device and in the combination therewith of yielding means whereby the distance between the thrust-step andv the drill or other tool may be automatically increased. When said thrust-step is brought to rest against a fixture, the tool will be forced into the work and in an entirely automatic manner for a short distance and until the efiiciency of said yielding means has ceased to feed the tool.

In myimproved apparatus forming the subject of this application not only the strength of the means whereby the tool is fed into the work may be adjusted, as above mentioned, but, furthermore, the location of the operating or working Zone of said means relative' to the tool-carrying spindle may be changed, so that after the tool has been fed into the work for an amount equal to'feeding limit of the yielding means the latter may be again positioned to act on the tool for another feeding distance.

My invention has,furthermore,for its obj ect the provision, in connection with the operating-handle, of a device whereby the leverage of said operating-handle may be increased or decreased at will, according to the work t-o be done.

In the accompanying drawings, in which similar characters designate similar parts, Figure l is a central longitudinal section of my improved apparatus, the latter being shown in its initial or starting position. Fig. 2 is a similar section representing the parts in a position after the cutting-tool has been fed into the work substantially to the limit of the automatic feed device. Fig. 3 is a side view of t-he apparatus. Fig. 4 is a section on an enlarged scale on line 4 4, Fig. 3.

It may be stated here that myinvention may be appliedto metal-working machines of various descriptions and that it is particularly adapted to machines in which drills or similar cutting-tools are employed, such tools being ordinarily fed into the work byhand and in such a manner that the drill will cut only so long as the hand-feed is continued. As has been stated above, it is one of the principal aims of my invention to provide means whereby a drill or other cutting-tool may be automatically fed toward the work for a certain distance before it becomes necessary to employ the hand-feed to provide for another length of automatic feed for the device.

In the accompanying drawings my improvement is shown in connection with a ratchetdrill of ordinary construction comprising a casing l0, adapted to receive the tool-carrying spindle l1, having peripheral teeth l1', which may be engaged by a suitable springpressed pawll2, pivoted in the handle portion 10 of the casing 10. The spindle 1l is rotatably supported in said casing and held against longitudinal movement therein by a shoulder 13 on one end thereof and a nut 14E 'on its other eud. Disposed for longitudinal movement vrelative to the tool-carrying spindle 11, and preferably in screw-threaded engagement therewith,is aspindle 15, carrying at its upper end a cap 16, having a thruststep 17 and adapted for sliding movement on said spindle 15. The latter is preferably formed hollow throughout its length to support and receive the means whereby said cap 16 may becaused to slide on the spindle 15. These means, which are preferably yielding ones, consistl in the present instance of a spring 18, resting with one end against said cap 16 and with its lower end against an ad.- justable plug 19, in screw-threaded engage- IOO ment with said spindle 15, while the movement of the cap 16 on said spindle 15 may be limited by a screw 20, carried by said cap and traveling in a movement-limiting slot 21, provided in the spindle 15. The plug 19 is preferably screw-threaded to serve not only as a means for supporting the spring 18, but, furthermore, as a means for varying the efficiency of said spring, or, in other words, for increasing or decreasing the effective working pressure thereof by turning the plug 19 in proper direction. The spindle l5, which, as has above been stated, is in preferably screwthreaded engagement with the tool-carrying spindle 11, constitutes a medium whereby the location of the yielding feeding means may be varied relative to the tool-carrying spindle, and hence it will be understood that by rotating said spindle 15 the effective working zone of the yielding feeding means relative to the tool-carrying spindle may be changed without in any way interfering with the efficiency thereof, so that said spindle 15 will practically answer the purpose of and constitute a feed screw whereby the 'feeding means may be carried into proper working position. It will also be understood that when said feed-screw 15 has been denitely located relatively to the tool-carrying spindle 11, as shown, for instance, in Fig. 1, the said screw will be acted against by the spring 18, and thus force the tool into the work until the efcency of the spring has been exhausted, such position being shown in Fig. 2, when it again becomes necessary to turn said feedscrew 15J-outward.

As has been above stated, my invention also includes means whereby the leverage of the operating-handle may be increased or decreased at will, according to the work to be done, these means consisting,preferably,of a

collar 25,movably held on the operating-han- A dle 26 and secured thereto in any well-known manner. In the preferred form thereof shown said operating-handle is made slightly elliptical in cross-section to fit loosely within the similarly-formed aperture of a collar 25, which latter may he rotated on the operatinghandle until both parts are locked firmly together, as shown in Fig. 4. Here the collar 25 has been turned in the direction of arrow a sufficiently to be clamped on the handle, and consequently to be held against movement thereon.

The operation of my improved device is as follows: The cutting-tool is inserted into the tool-carrying spindle 1l and the device may now be placed in position with the point of the thrust-step 1'7 against a brace (indicated by B) and with the cutting-point of the drill against the work W. The feed-screw l5 is then turned to compress the spring 18, such conpression being limited by the screw 20 coming in contact with the lower end of the limiting-slot 21. As the spindle 11 is now rotated in the proper direction, the drill will gradually cut its way into the work for an amount equal to the movement of the screw 2O in the slot 21. In Fig. 2 of the drawings the parts are shown in a position when the feed movement has taken place nearly to the limit, and the feed-screw may now be turned again to compress the spring sufficiently so that the lat-ter may feed the drill into the Work for another feeding distance and under the same pressure conditions as before.

Having described my invention, what l claim as new, and desire to secure by Letters Patent, is-

1. The combination, with atool-carrying spindle; of a thrust-step mounted for longitudinal movement relative thereto; yielding means for causing said spindle to move relatively to the thrust-step; and adjustable means for positioning the eective working zone of the yielding means relative to the tool-carrying spindle.

2. The combination, with a tool-carrying spindle; of "a thrust-step mounted for longitudinal movement relative thereto; a spring for causing the tool-carrying spindle to move relatively to the thrust-step; and adjustable means for positioning the effective working zone of the spring relative to the tool-carrying spindle.

3. The combination, with a tool-carrying spindle; of a thrust-step mounted for longitudinal movement relative thereto; yielding means for causing the tool-carrying spindle to move relatively to the thrust-step; and means for varying the eiiiciency of said yielding means.

4. The combination, with a tool-carrying spindle; of a thrust-step mounted for longitudinal movement relative thereto; a spring for causing said spindle to move relatively to the thrust-step; and a device for varying the vtension of said spring.

Aing the tension of the spring.

7. The combination, with a tool-carrying spindle; and a feed-screw mounted for longitudinal movement relative thereto; of a thrust-step mounted for longitudinal movement relative to said feed-screw; and yielding means interposed between said step and feed-screw.

8. The combination, with a tool-carryingv spindle; and with a feed-screw longitudinally movablerelatively thereto and carried thereby; of a thrust-step carried by said screw and mounted for longitudinal movement relative IOO IIO

thereto; and yielding means for causing the tool-carryin g spindle to move relatively to the thrust-step.

9. The combination, with a tool-carrying spindle; and with a feed-screw longitudinally movable relatively thereto and carried thereby; of a thrust-step carried by said screw and mounted for longitudinal movement relative thereto; yielding means for causing the tooloarrying spindle to move relatively to the thrust-step; and adjustable means for positioning the effective Working zone of the yield ing means.

10. The combination, with a tool-carrying spindle; and with a feed-screw longitudinally movable relatively thereto and carried thereby; of a thrust-step carried by said screw and looking the collar against movement thereon. 3o

JOSEPH B. RENSHAW. Witnesses:

CHAs. F. SCHMELZ, NELLIE PHOENIX.