US778055A - Electric switch. - Google Patents

Description

No. 778,055. PATENTED DEC. 20, 1904. W. J." LLOYD 81: H. G. WHITE.

ELECTRIC SWITCH.

APPLIOATION FILED APR.6,1903.

2 SHEETS-SHEET 1.

N0 MODEL.

MAGNET/C CLUTCH flMG/VET/C CLUTCH MOTOR AFMATU/FE WITNESSES No, 778,055 PATENTBD DEG. 20, 1904. W. J. LLOYD 8: H. G. WHITE.

ELECTRIC SWITCH.

APPLIGATION FILED APR. 6, 1903 2 SEBETSSHBET 2.

N0 MODEL 3Eg siai gs E 7 M 36 Ma w wwim mJ mi. .mm W/a/ B Q K P Q m H L PVITNESSES:

UNITED STATES Patented December 20, 1904.

PATENT OEEIcE.

WILLIAM J. LLOYD AND HAROLD C. IVHITE, OF PITTSFIELD, MASSA- CHUSETTS, ASSIGNORS TO STANLEY ELECTRIC MANUFACTURING COMPANY, OF PITTSFIELD, MASSACHUSETTS, A CORPORATION OF NEW JERSEY.

ELECTRIC SWITCH.

SPECIFICATION forming part of Letters Patent No. 778,055, dated December 20, 1904.

i Application filed April 6, 1903. Serial No. 151,270.

To all whom it may concern.-

Be it known that we, WILLIAM J. LLOYD and HAROLD C. WHITE, citizens of the United States, and residents of Pittsfield, county of Berkshire, and State of Massachusetts, have invented certain new and useful Improvements in Electric Switches, of which the following is a specification.

The object of our invention is to provide means for opening and closing switches which shall be reliable in action, which shall give a quick movement to the switch-blades, and which shall permit switches of large size or of high voltage to be manipulated at a dis.- tance with convenience and safety to the operator.

Referring to the drawings, Figure 1 shows a side view ofa structure embodying our invention. Fig. 2 shows an end view of the same. Fig. 3 shows diagrammatically the arrangement of the control-circuit, and Fig. 4 shows a diagrammatic development of the rotary switch in the control-circuit.

A is a small motor, preferably of the directcurrent series type. It is connected through magnetic clutch B with a shaft carrying the worm C, which gears with wormwheel D on shaft E. Also rigidly mounted on shaft E are arm F and rotary switch Cr, Fig. 2. Loosely mounted on shaft E is crank H, which is engaged by arm F, so as to be free to turn only in the direction of the arrow and which is connected by a connectingrod to rod 1, which moves horizontally in guides or bearings J and J. Rod I is provided at its end with teeth which gear with a gear-wheel (shown in dotted lines) inside casing K, which in turn gears with the teeth on the upper end of vertical rod L. Near its lower end rod L is attached to the toggle-joint formed by levers M M. t

N N are springs compressed by the togglejoint.

I Surrounding the lower part of rod L and forming a guide therefor is the piece O, which carries at its lower end rod P. Rod P engages a gear-wheel (shown in dotted lines) in casing K, which in turn engages with the 'own friction.

switch-rod Q. The switch, which may be of any well-known type, is inclosed inside the casing R.

Leaving the connections of the control-circuit to be considered later the operation is as follows: Assuming that in the position of piece O and rod P (shown in Fig. 2) the switch is closed, toggle-joint M M will be in the position shown, springs N N will be compressed, crank H will be in the position shown in Fig. 1, and rod I will be at the middle of its travel. Now if clutch B is excited and motor A is started up, so as to revolve wormwheel D in the direction of the arrow, armF will push crank H and draw rod I to the right in Fig. 1. This will move rod L downward and move toggle-joint M M off its dead-center, upon which springs N N will forcibly expand and quickly throw the toggle-joint down with a hammer-blow on the part of O designated as 0 in Fig. 2. Rod L is free to move quickly when urged by the springs, since crank H is loosely mounted on shaft E. Switch-rod Q is thus thrown sharply inward and the switch is opened with a quick sharp break. Motor A, however, continues to run. Arm F catches up with crank H and moves it on until it is in a position practically diametrically opposite to that shown in Fig. 1. At this point rod 1 is again in the middle of its travel, toggle-joint M M is on its deadcenter, and springs N N are compressed. It is at this point that rotary switch G opens the circuit of clutch B and motor A. Wormwheel D is thus immediately stopped, while motor A is allowed to come to rest under its If now it is desired to close the switch, motor A is again started up in the same direction. It is evident that togglejoint M M will be moved upward and will be forced by the springs N N against the part of O designated as 0, which will now be near the mid-position of the toggle-joint, and that the switch will be forcibly closed. Rotary switch G again opens the clutch and motor circuit when all the parts have returned to the positions shown in Figs. 1 and 2.

Referring now to Fig. 3, the connections of the control-circuit will be obvious. a represents the armature, and a the field of the motor. 6 represents the exciting-coil of the magnetic clutch. S represents a double-pole double-throw control-switch, which may be of any well-known type of hand-operated switch or of automatic circuit-breaker suited to the purpose. 8 s s are contacts (shown also in Fig. 2) adapted to be engaged by rotary switch G. The blades of rotary switch G are so placed with reference to these contacts as to break the circuit when arm F is in practically a vertical position, as has been heretofore described. s is always engaged by one of the blades of rotary switch G, and s and s are engaged alternately, one making contact before the other breaks contact. This is plainly shown in the diagrammatic development of switch G in Fig. 4. zftare the leads connecting with the source of power for the control-circuit. Now if s and s are engaged by rotary switch G and S is thrown to the left, as shown in Fig.3, the control-circu it will be closed through contact 8', switch Gr, contacts, switch S, clutchcoil Z), motor-armature a, motor-field a, and switch S. The motor will accordingly start, open, or close the main switch as the case may be, and be stopped by contacts breaking contact when the toggle-joint is on its dead-center, as has been heretofore described. At this point contact 8 is engaged by rotary switch G. Consequently if switch S be thrown to the right by hand or by its'automatic circuit-breaking mechanism if a circuitbreaker of any well-known type is used the motor will again start and reverse the position of the main switch and will again be stopped when the toggle-joint is on its deadcenter by contact 8 breaking contact. Contacts s and 5- may be pivoted so as to allow a slight movement in the direction of rotation of switch G and be provided with springs, as indicated in Fig. 2, to give a quick break on disengaging with the blades of switch G.

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

Having thus fullydescribed our invention, we claim as new and desire to secure by Letters Patent- 1. In combination, a reciprocating springactuated toggle-joint, electroresponsive means for moving the toggle-joint in either direction from its dead-center, and a switch mechanism adapted to be operated by the movement of said toggle-joint in either direction from its dead-center.

2. In combination, a reciprocating togglejoint, electroresponsive means for moving said toggle-joint in either direction from its dead-center, springs adapted to forcibly compress said toggle-joint, a member adapted to be impinged upon by said toggle-joint under the influence of said springs, and a switch adapted to be actuated by the movement of said member.

3. In combination, a switch-actuating mechanism, a spring-actuated toggle-joint adapted to forcibly strike said switch-actuating mechanism, and electroresponsive means for moving said toggle-joint in either direction from its dead-center.

4. In combination, a reciprocating togglejoint, a switch mechanism adapted to be operated thereby, springs adapted to compress said toggle-joint, and electroresponsive means for moving said toggle-joint in either direction from its dead-center and for restoring said toggle-joint to its dead-center against the pressure of said springs.

5. In combination, a spring-compressed toggle-joint, a switch mechanism adapted to be operated by the movement of said togglejoint, an electroresponsive device for moving said toggle-joint in either direction, and a switch actuated by the movement of said device and adapted to open the circuit of said device when the toggle-joint is on its deadcenter.

6. In combination, a reciprocating togglejoint, a switch mechanism adapted to be operated thereby, springs adapted to compress said toggle-joint, an electroresponsive device adapted to move said toggle-joint in either direction from its dead-center and to restore it to its dead-center against the pressure of said springs, and a switch actuated by the movement of said device and adapted to open the circuit of said device when said toggle-joint ,is on its dead-center.

7. In combination, aswitch-actuating mechanism, a spring-actuated toggle-joint adapted to forcibly strike said mechanism, an electroresponsive device adapted to move said toggle-joint in either direction from its dead-center and to restore it thereto, and a switch actuated by the movement of said device and adapted to open the circuit of said device when said toggle-joint is on its deadcenter.

8. In combination, a reciprocating togglejoint, a switch mechanism adapted to be operated thereby, springs adapted to forcibly compress said toggle-joint, an electroresponsive device adapted to move said toggle-joint from its dead-center, and connecting meansbetween said device and said toggle-joint adapted to permit the disengagement from said device of said toggle-joint when moved from its deadcenter.

9. In combination, a reciprocating togglejoint, a switch mechanism adapted to be operated thereby, springs adapted to forcibly compress said toggle-joint, an electroresponsive device adapted to move said toggle -joint, means adapted to permit the disengagement from said device of said toggle-joint when moved from its dead-center, and the ren- Signed atPittsfield, Massachusetts, this 31st gagement of said device with said toggle-joint day of March, 1903.

to restore said toggle-joint to its dead-center, V. J. LLOYD.

and a switch actuated by the movement of HAROLD C. WVHITE.

said device and adapted to open the circuit of Witnesses: said device when said toggle-joint is restored L. A. HAWKINS, to its dead-center. R. E. HAYNES.

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