US566060A

US566060A - chapman

Info

Publication number: US566060A
Authority: US
Publication date: 1896-08-18
Anticipated expiration: 1913-08-18

Description

(No Model.)

G. D. CHAPMAN.

' LATHE.

Patented Aug. 18, 1896.-

UNITED STATES PATENT OFFICE.

GEORGE D. CHAPMAN, OF FITCHBUBG, MASSACHUSETTS, ASSIGNOR TO JAMES L. CHAPMAN, HARRINGTON SIBLEY, AND JOSEPH S. WILSON,

OF SAME PLACE.

LATHE.

SPECIFICATION forming part of Letters Patent No. 566,060, dated August 18, 1896.

Application filed February 25, 1895- Serial No. 539,692. (No model.)

: portions of a lathe as embody my invention. 7

My invention is adapted particularly to that class of lathes known as engine-turning lathes, which are provided with parallel rotating shafts journaled in brackets at the I side of the lathe-bed and employed to impart a traversing motion to the tool-carriage along the ways of the lathe, one of said shafts be-' ing provided with a screw-thread and known asthe feed-screw, while the other is designated the feed-rod.

The object of my invention is to provide means by which either the feed-rod or feedscrew of the lathe can'be connected with a rotating spindle, which is driven through a system of gearing known as change-gears,

such as are commonly employed in driving the feed-screw of the lathe; and it consists in the construction and arrangement of parts as hereinafter described, and set forth in the o annexed claims.

Referring to the accompanying drawings, Figure 1 represents the head of a lathe, showing a portion of the bed and one of the brackets attached thereto, in which the feed-rod 3 5 and feed-screw are journaled. Fig. 2 represents an end view of the bracket. Fig. 3 is a sectional view of the bracket on line 3 3, Fig. 2. Fig. 4 is a sectional view of the bracket on line 4 4, Fig. 3 5 and Fig. 5 repre- 0 sents a modified construction and arrangement of the clutching device, the operating parts only being shown.

Similar letters refer to similar parts in the different figures.

A denotes a portion of the lathe-bed, A the head in which the live-spindle of the lathe ,is journaled, and 2 is a bracket attached to the lathe-bed by screws A A The bracket A supports one end of a feed-rod B and a feed-screw 0, the opposite ends of the feedrod and feed-screw being usually supported by a bracket attached to the opposite end of the lathe-bed. (Not shown in the drawings.)

The end of the feed-rod B is .inclosed in a rotating sleeve 13*, journaled in thebracket A said feed-rod and sleeve being operatively connected in any suitable mannerin the present instance by means of a collar B attached to the end of the feed-rod and engaging the end of the sleeve B by means of clutch-teeth. Attached to the sleeve B is a cone-pulley B, by which rotary motion is imparted to the sleeve B and rod B by means of a belt connection with a driving-pulley in the usual and well -known manner. The sleeve B is provided with a pinion 13, either attached thereto or formed integrally with the sleeve, by which rotary motion can be imparted to the sleeve B and rod B by means of connected operating mechanism, as hereinafter described.

The end of the feed-screw G is journaled in the bracket A and is provided with an attached collar 0*, bearing against the side of the bracket, in order to receive the end thrust of the feed-screw.

J ournaled in the bracket A is a rotating spindle C, with its axis in alineinent with the axis of the feed-screw G and with their opposing ends contiguous. Attached to the spindle G is a gear C forming one of a train of gears known as change-gears, by which the spindle Ois connected with the live-spindle of the lathe. spindle C is a pinion C provided at its side with clutch-teeth C Attached to the end of the feed-screw O is Turning loosely upon the a collar 0 provided with clutch-teeth C on the side opposite the pinion C Sliding on the spindle O,but having a spline connection therewith, is a sleeve D,

having at one end clutch-teeth D, adapted with an annular groove D to receive the actuating-pin of the shipping mechanism,which consists of a spindle E, journaled in a plate E, attached to the bracket A and having a milled knob E, by which the spindle E is rotated by the operator in order to rotate the plate E attached to the spindle E. The plate E is provided with an eccentric-pin E'flwhich engages the annular groove D of the sleeve D, the pin E being placed either directly above or below the aXis of the spindle E when the sleeve D is midway between the pinion C and collar C and with its teeth disengaged from the teeth 0 and C thereby allowing the spindle C to rotate without imparting its motion to either the pinion C or collar 0 A slight rotation of the spindle E in one direction serves to slide the sleeve 1) along the spindle O and carry the teeth D into engagement with the teethO, causing the pin ion 0 to be rotated, while the rotation of the spindle E in the opposite direction will carry the teeth D into engagement with the teeth C imparting arotary motion to the shaft 0.

Held in the bracket A is a stud F, upon which is placed an intermediate gear F, capable of rotating on the stud F and engaging the pinion O and the pinion B so the rotation of the pinion O turning loosely on the spindle G, will impart a rotary motion to the feed-rod B through the pinion B and intermediate gear F. When the feed-rod is driven through the change-gear and spindle C, the belt connection between the cone-pulley B and its driving-pulley is removed by throwing off the belt, as is usually done when the cutting-tool is actuated by the feed-screw.

I am aware that it is not new to operatively connect the feed-screw and the feedrod of a lathe so the rotary motion of one will be imparted to the other, and I am also aware that it is not new to provide means by which the feed-rod and feed-screw can be connected or disconnected at will, and I do not claim either of these features broadly. The purpose of my present invention is to provide an improved means for accomplishing these results by which a single clutch only is required to connect the driving power communicated through the change-gears with either the feed-rod or feed-screw, and to simplify the construction and render it less liable to wear, and also to inclose the operating mechanism within the supporting bracket or framework.

In Fig. 5 I have represented a modified form of construction which, however, comes within the scope of a part of my invention, and other modifications will readily occur to those conversant with the construction of this class of machinery.

In the modified construction illustrated by Fig. 5, B denotes the feed-rod and C the feedscrew. To the feed-rod B, I attach the gear G, and to the screw 0, I attach the gear H. J ournaled between the feed-rod and feedscrew is a spindle I, to which rotary motion is imparted through either the cone-pulley I or the gear 1 both of which are attached to the spindle I. Turning loosely upon the spindle I are the gears J and J, provided upon their opposing sides with clutch-teeth J and J Sliding on the spindle I and between the gears J J" is a sleeve K, having a spline connection with the spindle and provided with an annular groove K and with clutch-teeth K and K adapted to engage the teeth J and J 011 the gears J J.

A shipping mechanism similar to that described above can be employed to slide the sleeve K and carry it midway the gears J J with its teeth disengaged from the teeth J J or to the right or left, bringing its teeth into engagement with either the teeth J 2 J allowing the feed-rod B and feed-screw O to be entirely disconnected from the driving power, or either the feed-rod B or feed-screw O to be connected with the driving power at will.

In the modified construction shown in Fig. 5 it will be observed that the driving-spindle O, which is shown in Fig. 3 as in alinement with the feed-screw O, is transferred to aposition midway between the feed-rod and feed screw and becomes the driving-spindle I; and it will be obvious that the driving-spindle can either be placed in alinement with the feed-screw, as shown in Fig. 3, in which case the sliding sleeve is made to engage clutchteeth on the collar 0 carried by the feedscrew, or it can be placed out of alinement with the feed-screw, as shown in Fig. 5, requiring intermediate gears. It will also be obvious that the feed-rod B and feed-screw 0 could be made to change places by making B the screw and O the feed-rod.

The gist of my invention, so far as it relates to the clutching mechanism itself is concerned, consists in employing a single rotating sliding clutch operatively connected with the driving power as communicated through the change-gears and placed between connected operative mechanism leading on one side to the feed-screw and 011 the other side to the feed-rod, whereby the sliding motion of the clutch in one direction serves to connect the driving power with the feed-rod, and its sliding motion in the opposite direction serves to connect it with the feed-screw, thereby enabling me to secure the extreme variation in the movement of the cutting-tool when actuated through the feed-rod as when actuated through the feed screw. lhe bracket A is provided with a chamber A, closed by the plate E in order to inclose the clutching mechanism, the milled knob E being the only portion exposed to view, and at the edge of the bracket A is a curved flange A forming a chamber A to inclose the pinion B and the gear F, so the front view of the lathe shows none of the connecting mechanism journaled on the bed of the lathe,means for imparting rotary motion to said driving-spindle, a pinion running loosely on said drivingspindle, a sliding clutching mechanism having a spline connection with said driving-spindle and adapted to connect said driving-spindle with said feed-screw when moved in one direction, and to connect said driving-spindle with the pinion running loosely thereon when 'moved in the opposite direction, and means.

for connecting said loose pinion with said feed-rod, substantially as described.

Dated this 11th day of February, 1895.

GEO. D. CHAPMAN. Witnesses:

F. O. CURRIER, J. M. SARGENT.