US870669A - Turn-table. - Google Patents

Description

PATENTED NOV. 12, 1907.

J. G. FLEMING.

TURN TABLE APPLICATION FILED AUG. 23, 1906.

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UNITED STATES PATIENT OFFICE.

JOSIAH C. FLEMING, OF DETROIT, MICHIGAN, ASSIGNOR TO PILLING AIR ENGINE COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

TURN-TAB LE Specification of Letters Patent.

Patented Novf12, 1907.

Application filed August 23. 1906. Serial No. 331.710.

To all whom it may concern:

Be it known that I, .Iosmn C. FLEMING, a citizen of the United States of "America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Turn- Tables, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to turn-tables particularly designed for use as locomotive turn-tables, and it is the object of the invention to obtain a construction which may be readily operated, either by power or by hand. To this end the invention consists in the construction as hereinafter set forth.

In the drawings, Figure 1 is a plan view of the turntable; Fig. 2 is an elevation of the driving mechanism; and Fig. 3 is a sectional plan view thereof.

A is the bridge or table, and B the circular track on which it is supported, these parts being of any suitable construction.

0 is a propelling mechanism which is attached to the bridge frame A and comprises a traction wheel D and a motor E for operating said wheel through the medium of suitable intermediate gear train F. The motor E is preferably one operated by compressed air and this is supplied directly from the air compressor on the 10- comotive Where the latter is live that is, where it is under steam. Both motor and traction wheel D are preferably mounted upon a frame G which is hinged to one of the sides H of the table A and the required pressure of the wheel upon the track is furnished by a spring I bearing downward on the frame G and adjustable in tension by the hand wheel K.

Heretofore, the construction substantially as above described has been in use and is adapted for the operation of locomotive train tables wherever the motive fluid under pressure is available, that is, either from a stationary compressor plant, or where live locomotives are handled. It frequently happens, however, that dead locomotives are handled on the turn-table, and, whereno other source of compressed air is available, the motor drive mechanism is useless. Moreover, it is not only useless, but is a positive hindrance to the hand operation of the table, as it operates as a brake, greatly increasing the effort required for moving the table. In the present invention, I have overcome this difliculty by providing means by which the motor, when not in use, is disconnected, so as to cut out its resistance to the hand operation.

In the construction illustrated, L is the motor shaft,

upon which is mounted the pinion M meshing with the l gear wheel N upon the parallel shaft 0, and P is a pinion on said shaft driving a gear wheel Q secured to the drive wheel D, thereby forming through the medium of an intermediate pinion Q a positive drive train between the motor and wheel 'D. To disconnect this train, a clutch is introduced therein, preferably between the shaft L and the pinion M. As illustrated, the pinion M is revolubly sleeved upon the shaft L adjacent to a collar R fixed upon said shaft. S is a rod slidable axially through a bore in the shaft L and carrying the coupling pin T, which passes through a slot U in the shaft and is adapted to engage either a recess V in the collar R or a corresponding recess W in the pinion M. Thus when the pin T is in the recess V, the shaft L is free to revolve independently of the pinion M, but when the pin T is in the recess the shaft and pinion are coupled.

X is a lever for operating the rod S, which is lulcrumed at Y to a bracket on the frame G and engages a collar Z on the rod S.

With the construction as above described, whenever the turn-table is to be power-driven, the lever X is shifted so as to couple the pinion M to the shaft L. The motive fluid may then be supplied to the motor E from the locomotive or other source, and will operate the drive wheel through the train described. If, on the other hand, the fluid for driving the motor is not available, the lever X is shifted to disconnectthe pinion l\I, which permits of operating the table, as by the hand lever A, without driving the motor.

What I claim as my invention is:

1. The combination with a turn-table, of a propelling mechanism comprising a track wheel, a motor, a frame on which said motor and track wheel are mounted, a drive train between said motor nnd track wheel comprising the motor shaft, :1 parallel shaft, :1 gear and pinion connection between said parallel shaft and track wheel, inter-meshing gears on said motor and parallel shaft, and a clutch for disconnecting the gear from the motor shaft, for the purpose described.

2. The combination with a turn-table, of a propelling mechanism therefor comprising a supporting frame pivoted to the table, a motor thereon, a traction wheel journaled in hearings on the frame, a drive train between said wheel and motor, and a clutch for disconnecting the mo tor from the traction wheel to permit the table to he operated by hand.

In testimony whereof I ailix my signature in presence of two witnesses.

JOSIAH C. FLEMING.

Witnesses JAMES P. BARRY, THOS. ODONNELL.

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