US751598A - Chusetts - Google Patents

Description

PATENTED FEB. 9, 1904.

G WRIGHT. MEANS FOR CONTROLLING GOVERNOR MOTORS.

APPLICATION FILED SEPT. 24, 1903.

N0 MODEL.

INVENTOR. Gilbettwrigbb. A

W1 TNESSES A TTORNE Y;

THE Norms PETERS co, wmmmumo, WASHINGTON, u. c.

No. 751,598. Patented February 9, 1904.

UNITED STATES PATENT OFFICE.

GILBERT WRIGHT, OF PITTSFIELD, MASSACHUSETTS, ASSIGNOR TO STAN- LEY ELECTRIC MANUFACTURING COMPANY, OF IITTSFIELD, MASSA- CHUSETTS, A CORPORATION OF NEWV JERSEY.

MEANS FOR CONTROLLING GOVERNOR-MOTORS.

SPECIFICATION forming part of Letters Patent No. 751,598, dated February 9, 1904.

Application filed September 24, 1908. Serial No. 174,451. (No model.)

T (LU 71171107771 7775 y concern: shows a diagram of connections adapted to Be it known that I, GILBERT WRIGHT, a citimy invention. Zen of the United States, and a resident of In the drawings, 7) Z) 7) represent three flat Iittslield, Massachusetts, have invented cer springs, which are firmly screwed to base A 5 tain new and useful Improvements in Means at right angles thereto. Z) is a strip of infor Controlling Governor-Motors, of which sulating material connecting the three flat the following is a specification. springs Z) l) 5.

My invention relates to electric switches, B is a handle carried by strip Z), by means and particularly to switches adapted to the of which the springs b b b may be bent in 1 control of small motors which must be given either direction. The flat springs b 7) b are impulses of long or short duration in either so proportioned that they may be bent easily direction. in either direction, but have sufficient rigidity In the synchronizing of alternating-current to return quickly to the middle position when machines which are driven by prime movers, the handle B is released.

15 either steam or water, it has been customary c 0 c and 0 0 c are two sets of contacts to bring the incoming machine to the proper screwed to base A and placed at such a disspeed for connecting to the bus-bars by means tance from springs Z) t I) that said springs will of the manipulation of the governor of the make contact with them only when they are 5 prime mover. Various methods of so mabent to either side.

2 nipulating the governor are in extensive use, In Fig. 3 the diagram of connections is one of the most satisfactory of these methods shown. as 0/; represent the line-wires from the being the use of a small electric motor to vary source of supply for the small motor M with the relation of the parts of the governor. field F, which varies the relation of the gov- 7 When such amotor is used, it is necessary in ernor parts. The governor mechanism is not 2 5 order to secure proper control of the govshown, since there are numberless devices of ernor to be able to give the motor impulses of this kind on the market and well known to longer or shorter duration in either direction. the art, and the particular arrangement of the Furthermore, since the operator must be motor varies in each case with the type of watching the lamps or synchronizers in order governor.

3 that he may know when the proper speed of WVith the switch in engagement with conthe incoming machine has been reached it is tacts c c 0, as shown in the diagram, both the essential that the governing mechanism for armature and field of the motor are connectthe motor shall be simple and shall require ed to the source of supply :0 a, and the motor no attention while it is being operated. will accordingly run in a certain direction.

3 5 The object of my invention is to provide a If now the switch is moved over into engageswitch for the control of such motors which ment with the contacts 0 0 c, the connection shall be extremely simple and economical in with the motor-armature is not changed and construction, which shall be very efiicient in the connection of the field is reversed. Thus 5 giving either a long or short impulse to the the direction of rotation of the motor is re- 4 motor in either direction, and which shall reversed.

quire no attention from the operator, and thus It is evident that with this construction of shall enable him to devote his attention enswitch and arrangement of circuits the opertirely to the synchronism-indicator. ator by giving a slight movement to the han- 9 In the accompanying drawings, Figure 1 die B in either direction may start the motor 45 shows a side elevation of a switch constructed in one direction or the other, as desired. in accordance with my invention. Fig. 2 Moreover, since springs b b 6 return to their shows an end elevation of the same. Fig. 3 central position out of engagement with both sets of contacts when released the operator can readily give impulses of either long or short duration to the motor at will and can stop the motor instantly by merely releasing the handle. It is further obvious that no attention is required to the controlling apparatus, since the motor is stopped by merely releasing the switch, and consequently the entire attention of the operator may be devoted to the synchronism-indicator.

I do not desire to limit myself to the particular construction and arrangement of parts here shown, since changes therein which do not depart from the spirit of my invention and which are within the scope of the appended claims will be obvious to those skilled in the art.

Having thus fully described my invention, I claim as new and desire to protect by Letters Patent 1. In combination, an electric motor, and a starting and reversing switch therefor comprising a plurality of flat springs mechanically connected and tending to return to a given position, and two sets of contacts arranged one on each side of said springs and adapted to be engaged by said springs when said springs are moved from said given position.

2. In combination, an electric motor, and a starting and reversing switch therefor comprising two sets of stationary contacts and a set of springs mechanically connected and rigidly supported at one end between said sets, said springs being adapted to engage said contacts when moved in either direction from their central position.

3. In combination, an electric motor, a source of supply therefor, two sets of switchcontacts of three contacts each, two contacts of each set being connected to the said source of current and the third contact to one terminal of the motor-armature, and three springs mechanically connected and tending to return to a given position, said. springs being arranged to engage one of said sets of stationary contacts when moved in either direction from said given position, one of said springs being connected to a terminal of said motor-armature and the other two springs being connectcd to each of two terminals of the motor-field. V

Signed at Pittslield,Massachusetts, this 18th day of September, 1903.

GILBERT l/VRIG H 'l. WVitnesses:

L. A. HAWKINS, R. F. HAYNES.

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