US1206600A - Coupling device. - Google Patents

Description

A. W. SCHH/UWM d E. B. WILFORD.

couPLmG DEVICE.

APPLICATION FILED JULY 28, 19H.

Patented Nov. 28, 1916.

W/L'fbecf Qyf .5

rm: www; naux cvau Now-uma. Numa run. u. c.

man sweaters reuen ADOLPH W. SCHRAMM, 0F RIVERTON, NEVJ J ERSEY, ANI) EDIFJARD B. WILFORD, 0F MERION, PENNSYLVANIA, ASSIGNORS TO ELECTRO EENTAL MANUFACTURING COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYL- VANIA.

COUPLING DEVICE.

Leeaeoo.

Application led July 28, 1,911.

These objects and other advantageous ends' are secured as hereinafter set forth, reference being had to the accompanying drawing, in which Figure 1, is a vertical section illustrating the preferred construction of our attaching head; Fig. @,is a horizontal section on the line ca -a., Fig. 1; Fig. 3, is a vertical sec tion on the line Z)-b, Fig. 1; and, Figs. 4 and 5 are perspective views, on an enlarged scale, of certain of the details of the structure shown in Figs. 1 and 3; Fig. 5 including the co aerating parts of a hand piece'.

In the above drawings, 1 is a. part of a belt guiding joint on which is mounted a sleeve 2 'forming part of a casting 8 which has a tubular bearing il extending in a line at right angles to the line of said part 1. The casting as a whole is free to turn or swivel on the reduced end 5 of the part 1, upon which it is conined by a screw 6, although such turning is limited to something less than 3600 by means of a projecting tooth 7 so iixed to the part 5 by said screw 6 as to strike said casting when it has turned to a predetermined extent.

Within the tubular portion 4': of the casting 3 is revolubly mounted a sleeve 8 having an annular recess 11 in its external surface into which projects a locking plate or key 9 held by a screw 10 to the casting and extending through a suitable opening in the part 4l thereof into said recess. The outer end of this sleeve 8 is provided with a shoulder and enlarged portion 12 which is interiorly threaded for the reception of a. correspondingly threaded part of the hand piece; it being noted that it has also an Specication of Letters Patent.

Patented Nov. 28, 1916.

Serial No. 640,978.

internal shoulder 13 for the reception of the flanged end of a second sleeve 111 mounted within it. The construction of this latter sleeve is well shown in Fig. l, from which it will be seen that its second end 20 is somewhat reduced in diameter and has a. transverse slot 15 for the reception of the laterally projecting arms 17 on one end of a metallic tongue or dog 18 (Fig. 5) designed to be mounted in this reduced end so as to project into the body portion, as indicated in Figs. 1 and 3. II'he laterally projecting arms 17 serve as trunnions for this tongue or dog, permitting it to swing within the sleeve 11i to a limited extent.

A screi' 19 is threaded into this slotted and reduced end 2O of the sleeve 14e and serves to clamp to said sleeve a driving pulley 21. At the same time the screw and part 2O are so designed that the former upon being set up, slightly spreads the two halves of said part formed by the slots therein, thereby causing them to iirmly grip the walls of the opening through the pulley 21. which it will be noted, abuts upon a shoulder 22 formed between the main portion of the sleeve 14 and the reduced end 20. At the same time this screw 19 serves to maintain the tongue or dog 18 in place with its body portion projecting into the main part of the sleeve 1e.

It will be noted that the casting 3 has a flange 23 bent or curved to extend partially over and guard the pulley 21 which is so mounted that its plane is substantially coincident with or includes the axial line of the part Q of the wrist joint proper; said guard efl'ectually preventing contact of the opera-tor with the pulley or cord thereon.

As shown in Fig. 5 the tongue or dog 18 is designed to be engaged by a slotted member 24 mounted on or forming part of a hand piece of any suitable construction.

Under operating conditions a hand piece is coupled to the pulley 21 by having its properly threaded portion engaged by the threaded part of the sleeve 8 under which conditions the slotted member 24 which is attached to and held from turning by the hand piece spindle, enters the sleeve 111 and receives between its branches the dog or tongue 18. The sliding t between the member 24 and this dog or tongue, which swings on its arms 17 in the slots 1.5, allows sufficient movement to provide for any lack of alinement between the spindles of the hand piece and wrist joint. Any revolution of the pulley is thus transmitted to the sleeve 14 and thence through the dog 18 to the hand piece.

By the use of the peculiar dog or tongue 18, a free driving action is secured between al dental hand piece spindle and the driving pulley 21 regardless of how said parts are coupled by the sleeve 8, and the various parts are so arranged that they may not only be conveniently made and assembled, but in addition their 'arrangement is -such that the liability of any of the parts getting out of order or requiring attention is reduced toa minimum.

1. A coupling consisting of a supporting structure; a tubular spindle rotatably mounted in said structure; and an independently movable dog'consisting of a flat plate having projecting trunnion arms adjacent one end and loosely mounted so as to lie wholly within said spindle; with a member removably fitting the spindle and capable of engaging said dog.

A coupling consisting of a supporting structure; a tubular spindle lined in said structure but free to'turn therein; means for connecting a driven .member to the spindle including an oscillatory dog loosely mounted within the same; a driving pulley onsaid spindle; and a single device connecting the pulley to the spindle and holding 'the dog in place.

3. The combination of a supporting structure; a tubular spindle therein slotted at one end; a driving pulley mounted on the slotted end of the spindle; and a screw engaging said end of the spindle to spread the same for attaching it to the pulley; with a movable dog mounted in the slotted end of the Vspindle and retained therein `by said screw.

4. 'The combination of a supporting structure; two 4sleeves concentrically mounted therein, the inner sleeve being longitudinally slotted at one end and threaded; a pulley mounted on said slotted end; and a screw for altering the shape of said slotted end to cause it to grip the pulley; with a dog projecting into the inner sleeverand held in position by said screw.

The combination of a supporting structure; a tubular spindle mounted in said structure and longitudinally slotted at one end; an independently movable dog in the form of a substantially flat plate extending within said spindle and having trunnions entering the slot thereof; means for driving the spindle; means for retaining the dog in position; with a member formed to renter said spindle and transversely slotted at the end to receive said dog. Y

6. The combination of a tubular spindle; driving' means for said spindle; a relatively short substantially flat plate having integral trunnions projecting in its plane at opposite sides of one end and suspended by said trunnions wholly within lthe spindle; with a member formed to fit the spindle and capable of engaging the plate.

7. The combination or a sleeve having an internal shoulder and threaded internally at one end a second sleeve iitting within the first sleeve having a flange for engaging said shoulder' and transversely Vslotted at one end; a relatively short flat plate .having extensions adjacent one end projecting into the slot of said second sleeve, the plate lying wholly within said second sleeve; and Y means for preventing removal of the plate Vfrom the second sleeve; with means for transmitting power to or from said second sleeve.

In testimony whereof we have signed our names to this specilication, in the presence of two subscribing witnesses.

DOLPH W. SCHRAMM. EDY/IARD B. l/VILFORD.

Witnesses:

VILLIAM E. BRADLEY, WVM. A. BARR.

Copies of this patent may be obtained for five cents each, by addressing the fcommissioner oi Patents.,

Washington, D. C.

Images