US394786A - Apparatus for grinding lathe-centers - Google Patents

Description

(No Model.) I

T. W. R. MGCABE.

APPARATUS FOR GRINDING LATHE CENTERS; I No. 394,786. Patented Dec. 18, 1888.

WITNESSES /AWZ,

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UNTTED STATES I PATENT EEicE.

THOMAS \V. R. MCOABE, OF PHILADELPHIA, PENNSYLVANIA.

APPARATUS FOR GRINDING LATHE-CENTERS.

SPECIFICATION forming part of Letters Patent No. 394,786, dated December 18, 1888.

Appheation filed May 14, 1887.

To all whom it may concern:

Be it known that I, THOMAS IV. R. MOCABE, a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Improvement in Apparatus for Grinding Centers of Lathes, which improvement is fully set forth in the following specification and accompanying drawings.

My invention relates to improvements in apparatus for grinding centers of lathes; and it consists in the construction and combination of parts as herein set forth.

Figure 1. represents a partial plan view and partial horizontal section of an apparatus for grinding lathe-centers embodying my invention. Fig. 2 represents a view of the facingpiece thereof. Fig. represents a section in line a0 a3, Fig. 2. Fig. t represents a section in line y y, Fig. (3. Fig. 5 represents a section in line 2 .2, Fig. 4. Fig. 6 represents a top view of the bearing portion of the grindingwheel.

Similar letters of reference indicate corresponding parts in the several figures.

Referring to the drawings, A represents the center of a lathe, the same being connected with the rotatable head or disk "I, and 0 represents the tool-post, which features are of well-known construction.

D represents a frame, which has an arm, E,

for securing the same to the tool-post, said frame being adapted for supporting the parts of the apparatus embodying my invention.

\Vithin the boss A, at one end of the frame, is a rotatable sleeve, F, within which is a shaft, F, connected with said sleeve by a feather, so as to rotate therewith. To the outer end of the shaft F is secured a pulley, G, which has a beveled face, a, and is adapted to be placed in frictional contact with the head B, it being noticed that the shaft F is set obliquely to the axis of said head. To the end of the boss A is fitted a set-screw,II, which bears against a spring, II, at the end of the shaft F opposite to the pulley G for holdingthe latter in operative position against the head I In order to prevent motion of the screw H after adj nstment, I employ a j am-nut, J, which Serial No. 238,178. (No model.)

is fitted on said screw and tightens against a collar J which is secured to the sleeve F by a screw, J".

At the end of the frame A opposite to the boss A is a boss, A which is parallel with said boss A and likewise oblique to the axis of the head I \Vithin the boss A is a rotatable sleeve, K, to the exterior of which is secured a pulley, N, which enters a recess, Z), in the boss A Through the sleeve K is passed a shaft, P, which is connected with said sleeve by a feather, whereby the shaft may be moved in oppositedirections or in and out while receiving rotation from the pulley N. The end of the shaft toward the head B carries an emery or other grinding wheel Q, which, as will be seen, has its periphery coutignous to the lathe-center A and parallel with the side thereof. the shaft carries a knob, R, for convenience of working the shaft P in and out of the sleeve K as its bearings.

Secured to the sleeve F is a pulley, F around which passes an endless belt or band, S, which also passes around the pulley N, so as to operate the latter.

It will be seen that when the apparatus is located in position and secured to the toolpost the pulley G is advanced against the head B and held thereat by the spring II. The pulley receives motion from the head B, which, as well known, constitutes part of the lathe and is now running, and causes the rotation of the sleeve F, and consequently of the pulley Owing to the belt S, power is communicated to the pulley N, and consequently to the shaft P, whereby the grindingwheel Q is rotated. The wheel Q, as running, is now moved along the side of the center by drawing the shaft P in and out of the sleeve K, said sleeve and shaft, however, continuing its rotation. In this manner the center may be quickly and uniformly ground, and when the work is acconmlished the apparatus may be readily disconnected from the tool-post and removed.

Owing to slots existing in the head B, it is desirable to cover the same in order to pre vent irregular motion of the pulley G. For this purpose I employ a facing-plate, T, which The opposite end of is temporarily secured to the head B and has a central opening, (1, through which the center A projects.

In lieu of the belt S, the pulleys F N may be of the form of pinions or spur-wheels which mesh with each other, and thus cause the rotation of the grinding-wheel.

As the shaft F is connected with the sleeve I by a 'l'eather, said shaft may slide in and out of said sleeve, whereby the friction-disk may be set or adjusted relatively to the distance of the head 1-3 from the frame D.

The pressure of the spring ll against the shaft, and consequently against the frictionpulley (l, is adjusted by the screw ll.

.1 laving thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an apparatus of the character named,

a boss with sleeve having a bearing in said boss, a shaft longitudinally movable in said sleeve and having a bevel-pulley thereon, a spring bearing against the end. of said shaft, the collar J secured by screw J to said sleeve, and a screw, ll, bearing against said spring, said parts being combined substantially as and for the purpose set forth.

3. An apparatus of the character named, ermsisting of the frame 'D with the bosses A A the sleeve F, journaled in the boss A and carrying the pulley F, the shat't F, rotatably secured to the sleeve F by a feather-connection and carrying the bevel-faced pulley G, a spring and screw adjusting mechanism secured to said sleeve 15 for said shaft F, the sleeve K, journaled in the boss A the shaft 1, having leather-eminect ion with said sleeve K and carrying the emeryavheel Q, a pulley eormecled to said sleeve K, and the band S, connecting the pulley F and the pulley 01] sleeve K, said parts being coml'iined substan- 5o tially as described.

'1. W. R. MCCABE.

Witnesses:

JoI-IN A. \VIEDERsHELM, .li-xs. I1. KELLY.

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