US303897A

US303897A - Metal-turning lathe

Info

Publication number: US303897A
Authority: US
Publication date: 1884-08-19
Anticipated expiration: 1901-08-19

Description

{No Model.)

N. v T HO MAS.

METAL TURNING LATHE.

Patented Aug. 19, 1884.

WITNESSES:

INVENTOR M PETERS. Phum-hflmgrlpher. Washmglon. D. c.

UNITED STATES PATENr RENE.

NICHOLAS THOMAS, O F CHICAGO, ILLINOIS.

METAL-TURNING LATHE.

SPECIFICATION forming part of Letters Patent No. 303,897, dated August 19, 1884.

Applieationfiled July 14, 1883. (No model.)

To all whom it may concern.-

Be it known that I, Nrcnoms THOMAS, of Chicago, in the county of (look and State of Illinois, have invented certain new and useful Improvements in Metal -Turning Lathes, of which improvements the following is a specification.

My invention relates, particularly, to lathes designed for turning shai'tiug or other metallic cylinders of considerable length; and its obj cot is to enable the surfaces of the work which are to be acted on to be subjected to continuous lubrication during the operation at the points of contact of the cutting-tools, and thereby to admit of desired increase of speed of thelathe without heating or injuring the edges of the tools; and, further, to admit of the employment of any desired number of cutting-tools, each of which shall act upon a eontinuously-lubricated surface, and be susceptible of insertion and removal as required without interfering with the operation of the others.

To these ends my improvements consist in a lathe-bed constructed in the form of an opentopped box or trough; also, in the combination of a box or trough lathe-bed and apair of cen ters whose axes are located below the top of said bed; also, in the combination of a box or trough lathebed and a cuttenhead connected to a carriage adapted to traverselongitudinally thereon, and carrying a series of cutting-tools; also, in the combination of a carriage, a cutter-head located therein, a series ofeutters connected to said head, and a device for moving the cutter-head axially within the carriage.

The improvements claimed are hereinafter more fully set forth.

In the accompanying drawings, Figure 1 is a vertical longitudinal central section through a lathe embodying my invention; Figs. 2 and 3, vertical transverse sections through the same at the lines a; m and 1 respectively, of Fig. 1; Fig. 4, an end view in elevation and on an enlarged scale of the tool-carriage and cutter head, and Fig. 5 a transverse section through the carriage with the cutter-head in elevation.

In the practice of my inventionI provide a lathe-bed, A, which is cast in the form of an open-topped and closed-ended water-tight box or trough, which is preferably semi-cylindrical, and is adapted to be filled to a proper point with water, soapsuds', or other suitable The tool-carriage E is adapted to traverse longitudinally upon ways or shears a on the upper sides of the bed A, and receives its movements from a feed-screw, c, in the ordinary manner. A cutter-head, E, is fitted within a recess in the carriage, and is secured therein by a cap, E", and locking-bolts 6 having proper nuts. The cutter-head has a central hub, f, which forms its beari n g on the carriage, within which is a bushing or sleeve, j", to fit the shaft to be turned, and a cylindri cal proj ection or collar,f, at each end of said central hub. Each of said end collars is provided with. recesses to receive a series of turning-tools, F, (in this instance three for each collar,) those at one end serving as roughing-out and those at the other as finishing tools, any desired number of tools being used, and being secured by clamps and set'screws. The cutter-head is held stationary in the carriage by a suitably key or stop, by the removal of which it may be turned upon its axes, so as to admit of the examination and removal of any one or more of the tools which may have become dulled or injured and the replacement thereof. Toadmit of the convenient rotation of the cutter-head for this purpose, a worm-wheel, c, is'lormed upon the periphery of its central hub, said worm-wheel being engaged by a worm, 6*, upon a vertical shaft, 6, journaled in the carriage E, and having a handle, 6, at top, by which it may be turned,so as to bring either of the cutters above the surface of the liquid in the bed without interrupting the operation of the lathe.

In operation, the bed A should be filled with liquid to a height slightly below the top of the shaft D, which is to be turned, so as to allow of the proper inspection of the work as it proceeds, the tools being so located that the cut ting-edges of all of them shall be entirely below the surface of the liquid. The screw 0 of the tail-stock is rotated by a pinion, c", on a IOO axes are located below the top of said bed, a

shaft, 0, fitting in-bearin'gs on the'upper sidc carriage adapted to traverse the bed longitudiof the stock, and engaging a gear, 0', on the nally,'- a cutter head having a Worm-thread screw 0, thus enabling the operator to rotate formed thereon, said head being connected to the screw without the necessity of working in the carriage, and a Worm-wheel to engage said the liquid in the bed. thread, and journaled in the carriage, all com- I claim as my invention and desire to secure bined and operating substantially as and for by Letters Patent 1 the purposes set forth.

A lathe-bed constructed in the form of a NICHOLAS THOMAS. water-tight trough or box, having an open top w and closed ends, a pair of lathe-centers Whose Vitnesses:

AND. J. BASSETT, IIARRY Foo'r.