US990512A - Electric switch. - Google Patents

Description

T. E. BARNUMQ ELECTRIC SWITCH.

APPLICATION FILED APR.23, 1909.

990,55 1 2. 1 4 Patented Apr. 25, 1911.

772572435568 I 4 ZZTZZJEFZZIZZ 6% w.%/ Tfiamaslifi rn m Attmwwm I H II II-C any invention, I shall descrihe the device THOIVEAS E. BARNETT/l, OF I'EI t FJUItI VTXSCONSIN, .PrSSIGNOl-t T0 THE CUTLEB-EA1VIWIER MFG. (10., DE IVXZLW'A. "33E, WIESCGNSZ', CORPORATION 03 TVIhCONSIN.

ELECTRIC SWITCH.

9,5it2. Specification Letters Patented Apr. 25, litiiitt.

.Appiicaticn filed April 23, 1909. Serial No. 491 791.

To all whom it may concern-.-

Be it known that I, THOMAS E. a citizen of the United Qtate residing at Milwaukee, in the county of rilwaulzee and 3 State of Wisconsin, have invented new and useful Improvements in Electric Switches, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

My invention relates to improvements in sorted between suitable spring contact fingers 8 (it a stationary contact 9 suitably secured to the hasc 1. At its forward end the is provided with downwardly 0X- l BARN tin, l

sleeve a; tending projections 11, 12 and 13, The projection 12 is preteably pointed, the Walls thereofv being inclined toward the base of the projections 11 and 13. The projection 12 preferably so arranged that When the switch is in closed position, the point thereof will be disposed on one side of the axis of electric switches, and more particularly to said switch, and when said switch is in open those adapted to he controlled from a. disi'msition, will he disposed on the opposite tance. side oi the axis thereof. The projection 13 It is the olojeet off my invention to pro preferably enlarged to form a Weight vide a switch adapted to remain in either tending to rotate the sleeve 3 in a direction open or closed position, with a single open to throw the switch in open position against ating winding adapted to be. energize. the stop 7. The friction between. the spring both open and close the same. This ar- 8 and the switch blade 2, however, rangement requires but a single control cirprevents said Weight from returning the cuit for both opening and closing the switch snitch i'ron'i full closed position to open po and enables the operating Winding to he desition. The purpose of the weight is to inenergized as soon the switch has been sure the movement of the switch to full open moved into either open or closed position. position after it has been disengaged from A further object of tiny invention is to the spring fingers 8. provide means whereby the s'wi ch will he The operating mechanism of the switch actuated with hammer like blow. coniprscs a solenoid Winding; 15 mounted For the purpose of more clearly disclosing; in a su .ble supportingframe 16, secured to the bse l by suitable means 17, The Winding 15 is provided with a movable plunger .18. Secured to the upper end of the plunger 18 is a rectangular rod 19, which passes through a correspondingly shaped aperture in the top oi the frame 16. The rectangular aperture in tl e frame pre- 1 is a front elevation of the device, and Fig. vei'its the rod 19 from turning. The sole- 2 is a side elevation thereof, noid is preferably so arranged on the base The several parts of the device are prct thatan axial line through its plunger would erably mounted upon an insulating base 1. pass through the axis of the switch. Ful- The switch illustrated comprises a knife crunied on a pin 20, which passes transblade 2 secured to an elongated sleeve versely through the end oi": the rod 19, is a The sleeve 3 is loosely mounted upon a l'iiti'ircated member 21, which has an elonspindle 4 which is secured to and projects gated pointed portion Surrounding the forwardly from the-base 1.. The sleeve 3 is rod 19 and resting upon the top of the magheld in place on the spindle t hy means of net frame is a suitable cushion, of rubber or a pin 5 passing transversely throu h the end other rnatin-ial, 23 upon which the member of said spindle. The blade of the switch l 21 is adapted to hear. The cushion 23 thus is movable between fixed stops 6 and 7 carforms a butter for said member. lfhe incinried by the base 1, and is adapted to he inillustrated in the accompanying drawing. which shows the preferred form of my invention. It should be understood, however, that my invention is not limited to the specific structure illustrated,

In the accompanying drawingr fiigurc her 21 is preferably symmetrically con switch, as shown in dotted lines, Fig. 1,

structed and is pivoted at such a. point that it will always return to initial position utter being rocked in either direction.

I I shall now describe the operation of the device, assuming the parts to be in the position illustrated in full lines in Fig. 1. in this position of the switch the point of the projection 12 is disposed on the left hand side of the pivotal point of the switch, and on the left hand side of the elongated portion 22 of the member 21. Hence, upon energization of the winding 15 its plunger moves the member 21 upwardly until the point 22 thereof engages the right hand wall of the projection 12. During continued movement of the plunger, the wall of the projection 12 guides the end of the member 22 into engagement with the projection 11. During this movement of the plunger it will be seen that the member 21 is rocked on its pivot until its end is forced to one side of the pivotal point of the switch. .\s soon as this occurs, and as soon as the member 22 engages the projection 11, continued movement of the plunger 18 will rotate the sleeve 3 in a direction to move the switch blade 2 out of engagement with the spring fingers S. Inasmuch as the plunger ot' the solenoid travels a considerable distance before any movement is imparted to the switch, the magnetic pull upon said plunger becomes very strong by the time the member 22 is in the position to impart movement to the switch, and consequently a hammer like blow is imparted thereto. As soon as the switch has been opened the winding 15 may be dcenergized, whereupon the plunger 15% and the member 21 would return to initial position. In returning to initial position the member 21 turns on its pivot until the elongated portion 22 is again in alinement with the rod 1.). In open position of the end of the projection 12 is disposed on the opposite side of the axis of the switch and tipon the opposite side of the elongated portion 22 of the member 21. Hence, when the magnet is again energized and the plunger 18 again raised, the wall of the projection 12 guides the end of the elongated portion 22 into engagement with the projection 13. Continued movement of the plunger thereupon turns the sleeve 3 in the opposite direction, thereby closing the switch. 'ihe winding 15 may then be deenergizcd, allowing the plunger and the member 21 to return to initial position. During movement of the switch to closed position, the projection 12 is again moved to the right hand side of the iixis of the switch, and consequently, when the winding 15 is again energized, the member 22 will be guided into engagement with the projection 11 with the result previously set forth. "ith this arrangement it will be seen that by means 01 a single switch the winding of the operating solenoid may be controlled to both open and close the switch.

l claiml. in an electric switch, in combination, a movable switch member biased toward one position and adapted to be moved to another position and electrm'csponsive means adapted when successively energized to cause movement or" said switch member alternately from one of said positions to the other, said switch being maintained in said second men tioned position independently of said elec troresponsive device.

2. in an electric switch, in combination, a movable switch member, a stationary cooperating contact adapted to frictionally hold said switch member, said switch member being biased in a direction away from its stationary contact, a reciprocating device adapted upon successive operations thereof in the same direction to move said switch alternately in opposite directions and an electromagnetic winding for operating said device.

3. In an electric switch, in combination, a pivoted switch member biased to move in one direction, an operating solenoid and a self adjusting member operated by said solenoid to cause said switch member to move alternately in opposite directions upon successive operation thereof in the same direction, said switch member being retained in closed position indepein'lently of said solenoid.

t. In an electric switch, in combination, a pivoted switch member biased toward open position, an operating solenoid therefor having a movable plunger and a pivoted member carried by said plunger and biased to a position from which it is movable in opposite directions, said pivoted member be ing adapted to engage said switch member alternately on opposite sides of its axis upon intermittent energization of said solenoid.

5. in an electric switch in combination, a pivoted switch member biased toward open position and having a tapered portion, the extremity of which is adapted to be thrown to opposite sides of the pivotal point of said switch member upon movement there of between open and closed position, a solenoid arranged below said switch member and having a plunger adapted to be moved upwardly when the same is energized and a pivoted pawl carried by said plunger and biased toward a position in which its extremity is in alinement. with the pivotal point of said switch member said solenoid when energized being adapte to move said pawl into engagement with said switch to operate the same and the tapered portion of I In witness whereof. T have hereunto snh said switch being adapted to guide said scribed my name in the presence of two wit- 10 pawl to one side or the other of the axis of nessee.

said switch member in accordance with the position of said switch member and said lHOMAb BARB switch member being adapted to remain in Vitnesses. closed position lndependently of said so- FRAXK. H. Human, lenoid. I S. \V. Fi'i'z GERALD.

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