US1647010A - Electric-circuit breaker - Google Patents

Description

ELECTRIC CIRCUIT BREAKER Filed April 1, 1927 I J9 0 .n 33

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T Apphcation filed April 1, 1927, Serial No. iao,21a, and in Great Britain April 12; 1926.

This invention has relation to electric cir-- cultbreakers or switches and it has for its" object" the provision of improvements by means of which certain advantages shall be obtained.

. be made to the embodiment illustrated, to some extent diagrammatically, on the accompanying sheet of drawings.

Fig. 1 is a viewshowing the parts of the mechanism in the positions they occupy whenthe circuit breaker is closed.

mechanism" in' the positions "they occupy when the circuit breaker has just been opened.

Figs. 3, 4 and 5 are detail views and show parts of the mechanism in different posi tions and-to a larger scale than Figs. 1 and 2.

11 is a casing in which the parts of the circuit breaker are contained and mounted. 12 is a frame or standard mounted on the back wall of the casing 11 and in which a pair of arms 13 is pivotally mounted on a.

pin 14. The arms 13 are connected toget-her at their one end by a spring or springs 15 and by the members of a toggle 16 and at their other ends carry contact making and breaking members 17 that cooperate with fixed contacts 18 mounted on the side walls of the casing 11 and to which the electric leads 19 are connected. The spring 15 tends to maintain the arms 13 in positions in which the contact making and breaking members 17 are out of contact with the contacts 18. The frame 12 has a longitudinal slot 20 with which the knuckle pin 21 of the toggle 16 engagesand by which it is guided. 22 is a push-pull rod mounted in a bearing 23 and extending to the outside of the casing 11. The bearing 23 is itself mounted on one of the end walls of the easing 11 and has a longitudinal slot 24 with which a pin 25 on the rod 22 engages. The rod 22 is thus constrained to rectilineal movement only. The free or inner end of the rod 22 is recessed and on this portion a pair of arms 26 is pivotally mounted on a pin 27. The one end of each of the arms 26 is hooked as indicated at 28. The arms 26 are sub'ect to the action of a spring 29 which ten s to cause the hooked ends 28 to overlap. 30 is a sleeve loosely mounted on the rod and. constrained as hereafter I tripping device.

. j strained against'rotarv motion. Fig. 2 is a view showing the parts of the sleeve 30 is adapted to co-operate withand actuate the arms "26. 32 is a no volt' release coil and 33 is the coil of an overload 34 is a lever pivotally mounted on a bracket 35. The rod 22 passes through the lever 34 and the hole 36fprovide d for this purpose is such that an ex- 181131011 '31 on the sleeve 80 can also pass therethrough. The hole 36 is'further such that by reason of the engagement of the ex tension 31 therewith the sleeve30 is re- The operation is as follows 1 .The circuit breaker is open at which time the contact makmg and breakingmembers .17, arm's-13 ,toggle 16 and spring or springs 15 are in the position shown in Fig. 2 and the hooked ends 28 of the arms 26 are in engagement with the knuckle pin 21 of the toggle 16. To close the circuit breaker,'the rod 22 is pulled outward and through the hooked arms 26 causes the knuckle pin 21 to travel along the slot 20 of the frame. 12. The members of the toggle 16 are thus moved into line and the arms 13 are moved to bring the contact making and breaking members '17 into contact with the contacts 18. The arms 26 and toggle 16 now occupy the positions shown in Fig. 3. The circuit breaker is now closed and will so remain until the rod 22 is pushed inward or the device controlled by the coil 32 or the coil 33' is actuated. WVhen the rod 22 is pushed in ward its free end 40 comes into contact with the'knuckle of the toggle 16 as shown in Fig. 4. When this happens, the toggle 16 is broken the spring 15 acting on and moving the arms 18 in directions to separate the contact making and breaking members 17 and contacts 18. If one of the devices controlled by the coil 32 or 33 become operative, the lever 34 is rocked to the position shown in Fig. 4, and acts on the sleeve 30 to move it endwise. The sleeve 30 during this movement acts on the arms 26 and causes their hooked ends 28 to move apart clear of the knuckle pin 21 of the toggle 16 as shown in Fig. 4. The movement of thesleeve 30, when the arms 26 are fully separated, is also imparted to the rod 22 and its end 40 is caused to contact with the knuckle of the toggle 16 which is thereby broken as before. The circuit breaker can be reset by inward movement of the rod 22, thereby the lends of the arms 26 aagag e the making andebreakingmembers. and means tov 1 make -andbreak the toggle and. to move; the ;.armsjto;close or openthe circuits. 1

,2. A. circuit breaker comprising a pair of arms pivoted on a common pin, and each carrying at one end .a contact making and breaking member, toggle mechanism and spring means connecting the other ends of said arms, fixed contacts to ,co-operate' with :said contactmaking and breaking members, a push-pullrod and :a pair of arms pivot- -5allyi mounted ongsaid rod on a common pin and having hooked ends to engage the knuckle pin of the toggle.

' "I3. Ajcircuit breaker comprising a pair of arms pivoted on a common pin, and each carrying at one .end a contact makingand breaking member, toggle mechanism and spring means connecting the other ends of said arms, fixed contacts to co-operate with said contact making and breaking members, a push-pull rod, a pair of arms pivotally mounted onsaid rod on a common pin and having hooked ends to engage the knuckle pin of the toggle andmeans onsaid pushpull rod to open the circuit breaker.

4. A- circuitbreaker comprising apair of arms pivoted on a common pin, and each :carrying at one end a contact making and breaking member, toggle mechanism and spring means connecting the otherends of said .-arms,, fixed contacts to. co-operate with saidcontact makingand breaking members,

I a push-pull rod, a pair of arms pivotally .,monnted on'said-rodon a common pin and having hooked ends to engage the knuckle .pin of the toggle, and endwise movable sleeve on said push-pull'rod to open said hook ended arms and means toactuate said sleeve.

'Datedth'is'lOth day of March, 1927.

GORDON MARSTQN.

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