US729716A - Means for electrically operating counter-shafts. - Google Patents

Description

No. 729,716. v PATENTED JUNE 2, 1903. N c. BASSETT. MEANS FOR BLEGTRIGALLY- OPERATING 0011mm SHAFTS.

APPLICATION FILED FEB. 27' 1902.

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FLgZ K v (ULtncsses. Inventor Norman C. 60556156. W by ru: NaRRzs fins 50.. WASH-Harem p c.

PATENTED JUNE 2, 1903.

, N. 0. BASSETT. MEANS FOR ELEGTRIOALLY OPERATING COUNTER SHAFTS.

. (Dwnesses Z2 PATENTED JUNE 2', 1903.

N. O. BASSETT. MEANS FOR ELEGTRIGALLY OPERATING GOUNTER SHAFTS.

APPLICATION FILED FEB. 27. 1902.

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'UNITED STATES Patented. June 2, 1908.

PATENT FFICE.

NORMAN (J. BASSETT, OF LYNN, MASSACHUSETTS, ASSIGNOR TO. GENERAL ELECTRIC COMPANY, A CORPORATION OF YORK. I

MEANS FOR ELECTRICALLY OPERATING COUNTER-SHAFTS SPECIFICATION forming part of Letters Patent No. 729,716, dated June 2, 1903.

Application filed February 27, 1902. Serial. No. 95,925. (No model.)

To all whom it may concern/r I Be it known that I, NORMAN C.-BASSETT, a

citizen of the United States, residing at Lynn county of Essex, State of Massachusetts, hav invented certain new and useful Improvements in Means for Electrically Operating Counter-Shafts, of which the following is a specification.-

This invention relates to mechanism for drivingcounter shafts for machinetools and its object is to enable such a shaft to be actuated by an electric motor and to be rotated in either direction without reversing the motor.

The invention consists in an electric motor mo nted on a suitable base-plate, which can be gecured to aceiling or wall, as desired, a counter-shaft jonrnaled in a movable frame, afriction-wheel on the counter-shaft having two concentric faces for engaging a friction-j pinion on the motor-shaft, and a device, either mechanical or electrical, for moving the frame. and causing one or the other of said faces to engage with the pinion. ,1. When the face larger in diameter is in contact-with the of the lower end of the cam-lever, on a larger scale. Fig. 6 is a cross-section of the same on the line 6 6, Fig. 5.. Fig. 7 is an end elevation of a modification, showing an electromagnet for operating the rocking frame. Fig. 8 is a longitudinal section of the electromagnet,and

. .Fig. 9 is a diagram of circuits.

The base-plate A has lugs a, by means of which itcan be fastened to overhead beams On the base-plate E, provided at one end with a stepped conepulley F and at the other with a driving wheel or pulley G, having two concentric faces g g, with an annular-space between them to receive a driving-pinion e en the motor-shaft.

The space is wide enough to permit the pinion to rotate without touching either face of the pulley; but a slight movement of the rocki g frame will shift' the pulley radialfiy and.

ring one face or the otherinto contact with the pinion/the pinion being in a radius of the ..ley and counter-shaft will be rotated in the reverse direction at a. faster speed, the face 9 being of less circumference than the face 9.

pulley substantially at right angles to,the

v To rock the frame D, I may use either mechanical means, as shown on Sheets 1 and 2 of the drawings, or an electrical device, as shown on Sheet 3. The mechanical device consists, preferably, of a lever H, fnlcrumed at h and carrying two cams I and K, engaging. with theend of an arm D, projecting from the rocking frame. Whemthe lever is moved in one direction from a central position, the cam I forces down the armD and brings the face 9 of the pulley into contact with the pinion... On moving the lever the other way the cam K lifts the arm and reverses the movement of thepulley. The cams are preferably adjustable lengthwise of the lever, as by means of the adjusting-screws L and clamping-screws M. Each cam has an inclined face 'i k to impart] movement to the arm D and a face t" k, concentric with the "lfulcrum of the lever, to hold the lever and arm in their operative position. v

To operate the lever H, a long leverN may be provided, extending down near to the operator and connected with the lever H by a link P. By means of this lever N the operator can cause the machine-tool belted to the cone-pulley to be started, stopped, and reversed at will.

Instead of thecams'I mayemploy solenoids to actuatethe arm D, as shown on Sheet 3 of the drawings. The arm is held normally in a central position by one or more springs, the

preferred construction being shown in Fig. 7, in which a rod passes through a lug (1. on the base-plate ad a lug d on the arm D. A spring R between these lugs and another spring R between the lug (Z and a washer r at the lower end of the rod keep the arm normallyin a central position, with the faces 9 9 out of touch with the pinion C. The actuating-solenoids S S are preferably two in numher, having a common axis and arranged in a suitable housing T and supported from the base-plate, as by depending studs T. The armatures UU of the solenoids are attached to a rod V, on which they are adjustable by screw-threads and lock-nuts, and the rod is pivotally connected with the end of the arm 1). When the upper solenoid is energized,

the arm D is drawn down and the machinetool is started. If the lower solenoid is energized, the machine is reversed.

A simple form of controller-switch is shown in Fig. 9. The main lines are numbered 1 and 2. A branch 3 runs from the positive line to a fixed finger 3. Fingers 4. and 5 are connected, respectively, by leads 4 and 5 with the solenoids S S. Another finger 6 con meets with a lead 6 in shunt to the solenoids. The three leads 4 5 6 are connected in multiple with one terminal of the motor (J, whose other terminal connects with the negative side 2 of, the main circuit. A movable set of contactplates 3 4 5 6", all connected together, serve to connect one of the fingers 4 5' 6 with line 1 at will, and thus start, reverse, or stop the counter-shaft without stopping the motor. The pull of the solenoid beingin proportion to the armature-current, the pressure between the friction pinion and pulley is in the same proportion.

What I claim as new, and desire to secure by Letters Patent of the United States, is-- The combination with an electric motor, of'

a counter-shaft, a driving-pulley on said shaft provided with two concentric faces, a pinion on the motor-shaft adapted to engage with said faces, a rocking'frame in which the counter-shaft is journaled, an arm on said frame, springs for holding thearm normally in a mom axis and connected in series multiple matures for said solenoids and connected with said arm, and means for causing the linecurrent to pass through one or the other of the solenoids at will, whereby the direction of rotation of the counter-shaft can be reversed without. reversing the motor.

In Witness whereof I have hereunto set my hand this 25th day of February, 1902.

NORMAN O. BASSETT.

, Witnesses:

' DUGALD MoK. MCKILLOP,

J OHN A. MCMANUS.

.cen tral position, two solenoids having a com- With said motor, and a'rod carrying the ar-

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