US996973A - Switch. - Google Patents

Description

' SWITCH.

APPLICATION FILED MAY 9, 1901.

1516111611 Jiily 4, 1911.

2 sums-gum 1.

I l VENTOR 0. E. CARPENTER.

- SWITCH.

I AAAAAAAAAAAAAAAAAAAAAAAA '1. 996,973. Patented July 4, 1911.

2 sums-sum 2.

1 Warren STATES PATENT OFFICE.

mums n. cnnrnnum, or nnwronx, N. Y., ASSIGNOR. TO THE corms-Human km. 00., OIIILWAUKEE, wrscoxsm; A eonronsrron or wrsconsm.

SWITCH.

Specification of Letters Patent.

Application filed Kay 9, 1907. Serial No. 372,735.

Patented July at, 1911.

To all whom it may concern.

Be it known that I, CHARLES E. CARPEN- m, a citizen of the United States, residmg at New York city, in the county of New York and State of New York, have invented new and useful Improvements in Switches, of which the following is a full, clear, conci'se, and exact description, reference being bad to the accompanying drawing, forming a art of this specificatlon.

y invention relates to improvements in switches" and particularly 7 to electro-magv netically operating switches.

One of the objects of-my invention is t construct a switch having a double break and means for disrupting the are formed upon the opening of the switch.

Another object of my invention is to provide a blowout magnet so arrapged as to use the iron of thearmature of he magnetoperating the switch to form a portion of the magnetic circuit of the blowout coil.

Still anotherobjeet of my invention is to provide a magnetic blowout for disrupting the are formed by the opening of a switch, at both points of interruption of the circuit.

I have illustrated in the accompanying drawings one embodiment of my invention, and said drawings:

Fi re 1' isan elevation of a solenoid switc embodying my invention. Fig. 2 is a diagrammatic view of the circuit arrangement illustrated 'in Fig. 1, and Fig. 3 is a sectional view on the line 3-3 of Fig. 1.

In the embodiment of the invention illustrated in the drawings, upon a suitable base or panel 2, preferably formed of slate or like insulating material, are mounted the various parts of the switch. The main switch comprises a pair of brushes 3 formed of l'aminatlons or leaves of copper suitably sup tied in a cup 4, carried by a tail rod .5. e cup is supported upon the tail rod by means of nuts 6 and 7 between which it is clamped. The brushes 3 are arranged to engage and make contact with a pair of stationary contacts 8 and 9, suitably supported The upper upon the face of the panel 2. end of the tail rod 5 carries a disk 10, which is supported upon a coiled spring 11 held in position by a collar 12. The disk 10 forms an auxi iary contact arranged to close the circuit across the pair of stationary contacts 13 and 14. When in open position, the

.circuit independent of the load circuit, such,

for example as applying a dynamic brake to a motor after disconnecting the motor from the line,or they may be usedas contacts for closing any other circuit as may be desired by the user.

For operating the switch, I provide a solenoid 18, the core 17 of which is connected with the tail rod 5, whereby as the core is raised, the switch members 10 and 3 will be closed. The upper end of the core of the solenoid is provlded with a non-magnetic screw threaded projection 19, carrying an adjustable collar 20 having a projection arranged to open a switch 21 pivoted at 22 and engaging a stationary contact 23.

For disrupting the are formed when the disk 10 o ens the circuit at the contacts 13 and 14, T provide a blowout magnet 24, which is mounted upon the rear of the anel or base 2, and is provided with a po e 25, having bifurcations 26 formed on the lower end. Each bifurcation is provided with an angular extension. 27, which projects throu h an opening in the base 2, and a slight distance beyond the face of the base, forming pole pieces 28, arranged upon either side of the stationary contacts 18 and 14. The oppositepole of the magnet 24; is secured in position by a bolt 29 which extends throu h the base and into the iron frame 30 of tie solenoid 18. By this arrangement, the magnetic circuit of the blowout coil extends from the pole pieces 28, to the plunger 17 of the solenoid 18, through the bolt 29, and back to the pole In order to assist in collecting the lines of force for the plunger 17 the magnetic gap between the plungerand the pole pieces 15 reduced by iron washers 17* disposed above and below the disk 10. It will be noted that the lines of force passing from the pole pieces 28 to the core or plunger 17 interrupt the are, formed by the disk 10 leaving the contacts 13 and 14, at right angles and thereby efliectnally disrupt the same.

The binding posts 31, 32 and 33 of the switch are connected respectively with a corn ductor 34, leading to a switch 35, a conductor 36, leading to one side of the line, and a conductor 37 leading to one terminal of the load. The opposite terminal of the load is connected with the opposite side of the line 38, and one side of the switch 35 is connected with the line 38, by conductor 39.

The binding,' post 31 is also connected by conductor l0 with the switch 21, and the contact 23 of said switch is connected by conductor llv with one terminal of the solenoid 18, the opposite terminal of which is connected by conductor 42, with the contact 8 and by a short conductor l3, with the contact 123. lnterposcd between the switch 31 and the contact 23 thereof, is a resistance ll arranged to be inserted in series with the solenoid 18 upon the opening of the switch 21. The binding post 32 is connected by conductor 45, with the contact 8, while the contact 9 is connected by conductor to with the binding post 33. The contact 9 is also connected by conductor l? with one terminal of the winding l8 of the blowout magnet. 24, the opposite terminal of which is connccted by conductor l9 with the contact 14.

In operation as soon as the switch 35 is closed, circuit will be established from the positive side'ifiti of the line by conductors 45 and t), through the winding of the solenoid 18, thence by conductor ell, across the switch 21, by conductors l0 and 3%, across the switch 35, and by conductor 39, to the negative side of the line. This energizes the solenoid 1S and the same attracts its core, raising the tail rod 5 and causing the disk 10 to engage the stationary contacts 13 and 14. The spring, ll supporting the disk 10 will permit the tail rod to continue to rise until the brushes 3 engage their stationary contacts 8 and 9 closing the circuit from the positive side of the line, by conductors 36 and 4:5, across the brushes 3, and by con-- ductors 46 and 37, to the lead. lVhen the core moves to the limit or". its upward travel the collar 20 engages the switch 91 opening the same and inserting the resistance ell in series with the winding of the solenoid 18 to prevent said solenoid from. ovtnf-hcating. The winding -18 of the blowout coil being in shunt with the contacts 8 and i) no current will flow through the winding as long as the main switch is closed. In event the switch 35 is opened the solenoid will immediately be detincrgi'lced permitting the tail rod 5 to drop, which carries with it the brushes 3 and the disk it). The brushes 3, however, will disengage from their stationary contacts 8 and 9 before the disk 10 and circuit will be established momentarily through the winding 48 and, as the disk 10 discugages its contacts 13 and i l, the blowout magnet will disrupt the are formed at this point. It will be seen that a very short interval elapscs between the opening of the main switch 3 and the auxiliary switch 10 and it is therefore possible to use a coinparatively small winding for this purpose.

' Having thus described my invention what I claim as new and dcsireto secure. by Letters Patent is:

l. The combination with a switch, of an electroanagnet for operating the same, a

blowout magnet for disrupting the arc formed on the opening o1 said switch and having a part of the magnetic circuitthereof formed by the armature of said electron'iagnet.

2. The combination with a switch having a main and an auxiliary contact member, of an clectro-magnet for operating said menu bers, and a blowout magnet for disrupting the are lormcd by the opening of said auxiliary switch having a part of its n'iagnetic circuit formed by the armature of said electro-magnet.

3. The combination with a base, of a movable member carrying a main switch and an auxiliary switch, mounted on said base, an electroanagnetfor operating said movable member also mounted on said base, and a. blowout magnet mounted upon the rear oi. said base and having a bifurcated pole piece projecting through said base in proximity to said auxiliary switch for disrupting the are formed upon the opening 01: said switch.

4. 111 an electric switch, in combination, a longitudinally sliding member, a main contact carried thereby, an auxiliary contact resiliently supported on said member and adapted to be closed before and opened after said main contact, and a blowout magnet for disrupting the are formed upon the opening of said auxiliary switch, part of the magnetic circuit of said blowout being through said movable men'iber.

5. In an electric switch, in combination, a solenoid, a plunger therefor, a main switch contact carried by said plunger, and an auxiliary switch resiliently supported upon said plunger, said auxiliary switch beingadapted to close before and open al'ter said main contact, and a blowout magnet for dis rupting the are formed upon the opening of said. auxiliary switch, part of the magnetic circuit of said blowout magnet being formed by said plunger.

6. In an electric switch, in conibination, a solenoid, a plunger therefor, a main switch contact carried by said plunger, and anauxiliary switch resiliently supported upon said plunger, said auxiliary switch being adapted to close before and open after said main contact, and a blowout magnet for disrupting" the are formed upon the opening of said auxiliary switch, part of the magnetic circuit of said blowout magnet being formed by said plunger, said magnethaviug a bifurcated pole piece disposed in proximity to said auxiliary switch.

7. In an electric switch, in combination, a solenoid, a vertically movable phmger,.a laminated main switch mounted thereon, an

ooaova greater than the distance between said disk and its stationary contacts, and a blowout magnet, part of the magnetic circuit of said blowout bein through said plunger.

8. The com1ination with a base, of a movable member, mounted thereon carrying a mainfswitch and an auxiliary switch, an electro-magnet foroperating said movable member also mounted on said base, and a blowout magnet mounted upon the rear of said base and having pole pieces extending vthrough openings in said base in proximity to said auxiliary switch for disrupting the are: formed by the opening of said switch, said blowout ma net having a part of its ma etic circuit Eormed by the armature ot' sai electro-magnetf- 9. The combination with a movable member, of a main switch carried by said movsaid main switch, an

able member, 'stationar contacts engaged by an auxiliary switch loosely mounted on said movable member. a spring adapted to resiliently support said auxiliary swltch on saidmovable member, stationary contacts engaged by said auxiliary switch, the distance between the auxiliary switch contacts and their cooperating member being less than the distance between the main switch contacts and their cooperatingmember, whereby the auxiliary switch will be closed before and open after the main switch,an electro-magnet for operating said movable member and a blowout magnet for disrupting the are formed upon the opening of said auxiliary, switch contacts, the circuit of said eletro-magnet being controlled by said auxiliary switch.

10. The, combination with a movable member, of a main switch member carried thereby, stationary contacts arranged to be I engaged by said main switch member, an"

auxiliary switch memberresiliently carried by said movable member, stationary contacts arranged to be engaged by said auxiliary switch member and disposed at a less distance from their cooperating switch memher than the contacts of the main switchmember, an electro-magnet for operating said movable member, and a blowout magnet for disrupting the are formed by the opening of said auxiliary switch, said mag magnetic circuit thereofpieces arranged in proximity of said switch for disrupting the are upon the opening of the same, said blowout magnet having a por after said main switch, and a blowout magnet for disrupting the are formed on the opening of said switch having a part of the i'ormed by the plunger of said solenoid.

13.,In combination with a solenoid haviri a movable plunger, of a vertical movab e rod carried by said plunger, a main switch contact carried by said rod, an auxiliary switch resiliently mounted thereon, a spring disposed on said rod and bearing against said auxiliary switch, said auxiliary switch having a shorter distance to move to engage its contacts than the main switch, said spring being adapted to maintain the auxiliary switch closed after the main switch opens, and a blowout magnet having pole pieces ad'acent to said auxiliary switch, the circuit'o said blow-out magnet being controlled by'sai'd auxiliary switch. 14. The combination with a base, of a movable member mounted on said base, a switch carried by said movable member, and

8' blOW-jlOl1t magnet mounted upon the rear ofsaid'base and having a bifurcated pole piece projecting through said base in proximity to said switch.

15. The combination with a base, of a movable member mounted thereon, a main switch and an' auxiliary switch carried by said movable member, and a blow-out magnet mounted upon the rear ofsaid base, and having a bifurcated pole piece projecting through said base in proximity to said auxiliary switch, part of the magnetic-circuit of said {blow-out magnet being formed by said mo able member.

16. Iii an electric switch, in combination,

a solenoid, a plunger therefor, a frame having portions coatiguous to said plunger, a main contact carried by said plunger, an auxiliary contact resiliently sup orted on said plunger adapted to be clOSeC before and opened after said main contact, and a blowbut-"magnet for disrupting the are formed upon the opening of said auxiliary contact, part ofthe magnetic circuit being through said frame and plunger.

17. In an electric switch,in combination,

a solenoid, a plunger therefor, a frame hav ing portions contiguous to said plunger, 1 main contact carried by said plunger, an

auxiliary contact resiliently supported upon said plunger adapted to be closed before and opened after said main contact, and ablowout magnet having a bifurcated po pies-a disposed in proximity to said zzuxiliai'y con-- tact.

18 In an electric switch, in combination, a solenoid, a plunger therefor, 21- frame hm ing portions conti uous to said plunger 2. main Contact Carried by said plunger an auxiliary Contact resiliently suppoi'lcd upon said plunger adapted to be closed before and opened after Silltl main COHtiICt 21ml :1 lJlO-\\'- out magnet having'a bifui'calecl pole picca i 050d in proximity to 5321 rxuxilimv coni. mrt 0i the inis neuc CHCUIl; 01- said A 1;) -v olowoula nm net b81133? Lurousrli we solenoid F o v plunger aim 11111119.

in witnc-iaus whereof i have hereunto subu a v 4 SCIfllJGd my nrimc in the presence of two witnei-

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