US401180A - Setts - Google Patents

Description

' 2 Sheets-Sheet 1 W. B.'LEARNED 8v L. MURRAY.

(No Model.)

. PINIDN mom@ MAGHINB.

Patented Apr. 9, 1889.

(No Model.) 2 Sheets-Sheet 2.` W. B. LEARNBD 8v L. MURRAY.

PINION FAGING MACHINE. Y

Patented Apr. 9, M389..

E?. wslmligi mmm @N m r M M NNN E UNITED STATES PATENT Fries.

VILLIAM B. LEARNED AND LEONIDAS MURRAY, OF BOSTON, MASSACHU- SETTS, ASSIGNORS OF ONEJIALF TO THE E. llOlVARl) VUATCH AND CLOCK COMPANY, OF SAME PLACE.

PlNlON-FAClNG MACHINE'.

SPECIFICATION forming part of Letters Patent No. 401,180, dated April 9, 1889.

Application filed May 6 1887. Serial No. 237,296. (No model.)

To @ZZ 1071/0111, it 11mg/ con/cern:

Be it known that we, lVILLIAM B. LEARNED and Lnolvnms MURRAY, of Boston,v in the county of Suolk and State of Massachusetts, have invented certain new and useful Improvements in Pinion-Facing Machines, of which the following is a specification.

This invention relates to the operation of finishing or polishing the ends of the leaves or teeth of watch or clock piniens, said op eration being technically known as facing. This operation is performed by subjecting the end of the pinion to a facing-shell, which is a cylindrical piece of metal having a central hole which receives the staff of the pinion, the end of the shell surrounding said hole presenting an annular polishing-face, which is in contact with the ends of the pinionleaves, and performs the facing or polishing operation thereon. The shell should have some freedom of lateral movement across the pinion end, so that it will not leave concentric marks thereon, and the shell should also be capable of rocking slightly during the operation, so that it will impart to the pinion end a slight concavity which so reflects the light as to give the pinion end a highly desirable appearance.

lt has been commen for the operator in facing by hand to hold the facing-shell in one hand while presenting it to the pinion, and at the same time rotating or oscillating the pinion by a liddle-bow held in the other hand, the pinion being inserted in acollet, which has a grooved pulley engaged with the string of the fiddle-bowlhe slight movements of the shell, which are necessarily produced by the involuntary movement-s et' the operatos hand and arm, are found to produce very perfeet results in imparting a polish free `from tool-marks, and in giving to the pinion end the slight concarity which is so much desired.

ln Letters Patent ofthe United States granted to lV. B. Learned February 22, 1887, No. 358,@2, a facing-shell is shown in engage ment with a held er adapted to rotate the shell, the holder being adapted to rock slightly while in contact with the pinion, and thereby imitate the motion of a shell held and presented loy the operators hand.

The present invention has for its object to provide a power-driven machine in which the facing-shell is adapted to rock on the spindle or holder that rotates it, as shown in the above-named patent, and in which either the said spindle or the chuck that holds the pinion is adapted to rock, or in which both the spindle and chuck are adapted to rock, so that any desired degree of freedom of movement of the facing-shell relatively to the pinio'n on which it acts may be attained.

To these ends our invention consists in the improvements which we will new proceed to describe. v

Of the accompanying drawings, forming a part of this specification, Figure l represents a side elevation of our improved machine. Fig. 2 represents a top plan view of the same. Fig. 3 represents a longitudinal section on line Qc, Fig. 2. Fig. 4 represents a section on line .e .2', Fig. 3, looking toward the right. Fig. 5 represents a section on line 4y y, Fig. 3, looking toward the left. Fig. G represents a side view of an operating device for the headstoek spindle.

The same letters of reference indicate the same parts in all the figures.

In the drawings, a. represents a bed secured to a pedestal, l1, which is provided with a vertical-rod, c, and a clamping-nut, d, working' on the threaded lower end of said rod and adapted to secure the pedestal l) to a bench,

j', as shown in Fig. f5.

rlhe hed d has a longitudinal groove, (j, in the side oi' which are formed the smaller grooves, 7l 71, which receive thel ears of the clamping-lugs j j', attached, respectively, to the head-stock it and tail-steek Z.

m represents the spindle or holder which supports the facing-shell n, said shell being engaged with the spindle, so as to rotate there- With an d rock thereon, substantially as shown in the Learned. patent above referred to.

The tail-stock is adapted to slide on the hase of, and is provided with any suitable devices whereby pressure may be applied to the lug j to lock the latter to the bed. The portion 2 of the tail-stock, in which the spindle or holder vm is journalcd, is connected, by pivots orxtrunnions 4 4, with the base 3 of the tail-stock, said trunnions being arranged to permit the spindle or holder m to rock laterally, and thus impart a rocking motion to the facing-shell, in addition to the independent rocking motion of the shell upon said spindle. The extent of lateral motion permitted by the described construction of the tail-stock is limited by screws or stops 5 5 in lugs 6 0, attached to the base of the ytail-stock, said screws being adjustable, so that they may either prevent any oscillating motion of the pivoted portion 2 of the tail-stock, as shown in 4, or may permit any desired extent of such motion. The base of the tail-stock has an upper section, 3', which is adapted to turn on the lower portion of said base and supports the pivots or trunnions 4 4. The section 3 has an arm or stud, 7, standing between adjustable screws S, which limit the turning motion of the section 3', and maylbe adjusted to permit said section to oscillate to any desired extent horizontally, and thus permit the spindle m to oscillate horizontally, the facing-shell being thus given an additional freedom of movement. The screws S 8 may be adjusted, however, so that the section 3 cannot turn. The upper section, 3, may be adapted to turn, as described, by any suitable means. In Fig. we have shown the said section 3 journaled on a beaded stud, A, aiiixed to the lower portion of the base and constituting a center on which the section 3 may rotate or oscilla-te horizontally.

The spindle m is adapted to slide freely in the bearings formed for it in the swinging portion 2 of the tail-stock, and is pressed and held forward by the operator during the facing operation. spindle ym, receives motion from a suitable motor. l

The head-stock L is composed of a base, l0, bearing on the bed c, and a frame, Il, in which the head-stock spindle q is journaled, stid frame being connected to the base by bolts or pivots l2 l2,which permit said frame and spindle to rock laterally, said rocking motion being controlled by screws or stops 13 13, inserted in ears 14 14 on the frame ll and bearing against the base lO. The pinion 7', held by the head-stock spindle, maytherefore be oscillated or moved back and forth laterally to any desired extent to move the end of the pinion across the acting face of the facing-shell. It will be seen, therefore, that provision is made for any desired extent of lateral motion, either of the spindle carrying the facing-shell or of the pinion being faced, or of both, so that any desired freedom of lateral movement of the pinion end and facing-shell relatively to each other may be attained.

A pulley, p, affixed to ther The l head-stoel; spindle has a spirally-A 'n.r, and is moved thereby to give the headstock spindle the described motion, the cord being' wound around the spirally-grooved pulley s. Any other suitable devices may be employed to reciprocate said cord.

The jar attending the operation of the machine and the rapid reversal of the rotation of the head-stock spindle may be reliedupon to produce the described lateral movements of the shell-carrying spindle m and headstock spindle q. XVe prefer, however, to give the head-stock spindle a positive lateral reciprocating movement by means of an eccentric, A, on a driving-shaft, B, and a rod, C, connecting said eccentric with the pivoted frame 1l., in which the head-stock spindle is journaled.

If desired, the tail-stock spindle m may be positively moved by similar means.

The machine thus organized is capable of imparting a beautiful finish to pinion ends, the result being quite as desirable as that produced by the old hand method first above described and much more rapid and economical.

l. In a pinion-facing machine, the combination of a supporting-bed, a head-stock having a pinion-holding spindle, a tail-stock having a laterallymovable portion, a spindle journaled in said movable portion, and thereby adapted to reciprocate laterally, and afacing-shell supported by said spindle and having an independent rocking movement thereon, as set forth.

2. In a pinion-facing machine, the combination of a supporting-bed, a tail-stock having aspindle, a facing-shell supported by said spindle and havingla rocking or oscillating motion thereon, and a head-stock having a laterally-movable portion, and a pinion-holding spindle journaled in said movable portion,

and thereby adapted to reciprocate laterally, as, set forth.

Alathe-stockcomposed of abasea frame pivoted to said base, and a spindle journaled in said frame, combined with power-driven devices, as an eccentric, A, and connectingrod C, whereby a continuous rapid rocking or oscillating motion may be automatically imparted to said frame and spindle, as set forth.

4. In a pinion-facing machine, the combination of a spindle having a grooved pulley, a facing-shell supported by said spindle and IOO IIO

adapted to Vrock, a cord engaged with said pulley, and power-driven devices, as a Crank- Wheel, 1c, and rod fr, for reciprocating said corel and jarring o1 rocking the facing-shell, as set forth.

lu testimony whereof We have signed our names To this spoocntio11,in the presence of two subscribing witnesses, this 30th day of April, 18S?.

VILLIAM B. LEARNED. LEONIDAS MURRAY. lVitnesses:

C. F. BROWN, ARTHUR W. CROSSLEY.

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