US1785887A

US1785887A - Circuit interrupter

Info

Publication number: US1785887A
Application number: US234111A
Authority: US
Inventors: William A Chryst
Original assignee: Delco Remy Corp
Current assignee: Delco Remy Corp
Priority date: 1927-11-18
Filing date: 1927-11-18
Publication date: 1930-12-23
Anticipated expiration: 1947-12-23

Description

Dec. 23, 1930. w. A. CHRYST 1,785,887

CIRCUIT INTERRUPTER Filed NOV. 18, 1927 WWI/M VIII/0'12 Patented Dec. 23, 1930 a cnnrsraor narrow, omo, AssIe oa-rro nnLco-armcoarom'non; or

j j 'nav'rjomomo, a conrom'rron or DELAWARE 1" cmcurr mrnRiiiirrEn v Application filed mu 18,4927. Serial in. 235111.,

preferred form of embodiment of the present invention is clearly shown.

l In the drawings:

- Fig. 1 is a rupter embodylng the present invention.

Fig. 2 is a side view thereof partly in section. Fig. 3 is an end view looking in the direction of the arrow 3 in Fig. 2,,

.Fig. 4 is an end view looking in the direction of the arrow 4 in Fig. 2. c

Fig.- 5 is a wiring diagram illustrating the use of the circuit-interrupter in a battery chargingcircuit.

The circuit interrupter includes a mag: netizable U y-shaped frame 20 which may be readily formed from. sheet metal. The yoke 21 of the frame isprovided with a central aperture for receiving the threaded exten sion 22 of a magnetizable core 23 having a longitudinal flute formed by a knurling operation. The core 23 is attached to theyoke the "core 23. 'The' threaded extension 22 is adapted to extend through a hole in a sup porting frame not shown and receives a nut 25 by which the frame 20 is secured to the supporting frame by tightening the nut 25.

The core is surrounded by a main energizing winding -30yofa relatively largenumher of turns of relatively ,.fine'wire and a winding 31 of relatively fewturns of heavy. wire which is preferably rectangular in cross section and insulated only by varnish. One terminal 320i the coil 30 andone terminal 33 of'the coil 31 areconnected together to a bracket--34 whichis attached by rivets 35 to a non-conducting plate carrying contacts lanview of a circuit interi-i 21'by clamping the yoke by a nut 24 against 37 which are adapted to beengagedby contacts' 38 carriedby the blades 39 of a plate 40 of resilient metal suchas hos hor bronze. The other end 41of the coi 31 is located so that it may be attached toa conductor connected with the positive terminal of a generator 80 having its. negative terminal grounded. The'other end 42 of the coil 30 1s attached to a terminal 43 for connection with ground. Thus the main energizingl'coil 30 is connected acrossthe generator terminals while the coil 31"is' connected in series with the'interrupter

contacts

37 and 38 and will belconnected with the-positive terminal jo fa storage battery 81 when the'contacts are closed by connection which will now be described;

.The contacts 38 are connected by rivets 38a with clips 44 connected by wires 45 with clips 46 which are clamped by screws 47 against a hinge supporting plate 48 which in I turn is clamped against the frame20. Thus it is seen that the contacts 38 are'electrically connected with the frame20. The threaded extension 22 of the core 23 not only provides a means for mounting the circuit interrupter but also provides a' terminal by which the contact 38 may be connected to the positive terminal of a storagebattery. Thus-it is seen that when the

contacts

37 and 38 are closed, the coil 31 willbe connected in series with the storage battery and the generator,

The

contacts

37 and 38 are closed electromagnetically when the coil 30 has been energized to a certaindegree so that the core 23 attracts an armature 50 to which the contact blades 39 are connected by

rivets

51, 3 The armature is hingedly connected with the hinge plate 48 by a flexible sheet metal strap 52 attached to the armature 50' by the rivets 51 and to the plate 48 by therivets 53. The

armature 50 is urged away from the core'23 so as to maintain the contact 38 out of engagement, with the contact 34 by a spring 54 attached at its upper end to an'extension 55 of the armature 50 and at itslower end to an ex-- tension 56 of an adjustable lever 57 which is pivotally connected with the frame 20 by a stud 58a The plate 57 is provided with a slot 59 for receiving a screw-driver slotted will be turned about its pivot 58 in order to adjust the tension of the spring 54. A screw 62 which passes through a slot 63 inthe lever 57 will, when tightened, securethe lever 57 to the frame 20 in the desired position of adj ustment.

The armature 50 is limited in its movement" away from the core 23 by a stop provided by an angle member'igfigt attached by a rivet 65 to a non-magnetizab le bridge member 66. The

angle member 64 has an opening 67. in its upright leg and an extension 68 of the armature 5O passesv through this opening and cooper; ates with the upright leg of the member 64 to limit u ward movement of the armature 50 or. cloc wise movement as viewed in Fig. 2. The member64 may be bent in order to vary the distance from the stop surface 64a thereof to the bridge 66, and, in this way, to vary the amount of separation of the armature 50 from the core 23. a p

The bridging member 66 is clamped between the branches of the frame-20 by screws 47. and 70. The screws 70 pass throu h slots 72 in the non-conducting plate 36, t rough plain holes in the frame 20 and through threaded holes in the depending leg 73 of the bridge 66. When the screws 70 are loosened the plate 36 may be adjusted longitudinally of the core 23 or vertically asviewed in Fig. 2 in order to vary the amount of contact separation and also to vary the minimum gap between the armature50 and the core 23. The

wires

32 and 33 are sufiiciently flexible to per mit this adjustment. I

The screws 47 pass through slots 75 in the hinge supporting plate 48, through plain holes in the frame 20 and through threaded holes in the depending leg 74 of the bridge.

66. By loosening the screws 47, the plate 48 may be adjusted vertically in order to vary the relationof the hinge connection between the armature and plate 48 to the frame 20. In this way the air ap. between the armature and core ma also e adjusted. Tightening the screws. 47 will secure the plate 48 in desired position of adjustment.

All of the adjustments can be readily made by the use of. a screw-driver. To vary the tension of the spring 54 the screw-driver is ap plied to the slotted disc 60 and the screw 62. To, vary the maximum air gap between the armature 50 and core 23 the screw-driver is applied to the screws 47, and the stop member 64 may be bent-if desired. To ad ust the amount of contact separation, the-insulating plate 36;may be adjusted by applying a screwdriver in the screw 70. I

The invention possesses certain advantages in that the number of parts have been reduced to'a minimum by a construction which enables certain parts to perform more than one amass? function. For example, the bridging member 66 serves to su port the stop member 64 and also serves to ocate the branches of the frame in definite relation to the core 23 which extends through an opening in the bridgin member 66 so as to bedefimtely located relative to the bridging member: The

screws

47 and 70 which clam the branches of the frame to the legs of the bridging member areused also to secure the vcontact'supporting plate 36 and a hinge" bracket 48in various positions of adjustment relative to the frame 20. The present invention possesses another advanta e in thatthe connection of the interrupter with a battery chargin circuit has been facilitated. a The threade shank 220i the core 23 not only provides for attaching the core to the magnet frame 20 but also provides one of the terminals of the circuit interrupter- While the form of embodimentof the present invention as-herein disclosed, constitutes a Ereferredform, it is to be understood that ot er forms mightbe adopted, all comin within the scope of the claims which follow.

What is claimed is 'as follows: I A circuit interrupter comprising a magnet frame supporting a core" surrounded by a winding, an armature pivotally supported by the frame,interrupter contacts, one of which is actuated by the armature, a tension spring for urging the armature awa from the core, and means for adjusting the tension of the spring and comprising a lever attached to one end of the spring and pivotally supported by the frame, means for turmng the lever, and means for clamping the lever tothe frame in adjusted position. 2. A circuit interrupter according to claim 1 in which thepivoted lever is provided with a slot for receiving a screwdriver-slotted disc having an eccentric shank pivotally connected with the frame. 3 p

3. A circuit interrupter comprising a U- shaped magnet frame, with parallel sides, a core supported by'the yoke of the frame and extending from the yoke in the direction of the frame sides, a non-magnetizablebridge extending from one frame side to the other and having an opening for receiving the free end of the core, screwsfor'attaching the bridge to the frame sides, a pairof inter-v ruptercontacts, a bracket attachedto one of the frame sides, and supporting one .ofthe contacts, and an armature hingedly connected with the other frame side and supporting the other contact, said screws attach. ing the bracket and armature hinge as well V asthe bridgeto the frame sides.

4. A circuit-interrupter according to claim 3 in which the contact bracket'isprovided with slots elongated in the direction parallel to the core, said slots receiving'theflscrews which attach one end of the bridge to the frame side, whereby the contact bracket is which is actuated by the armature, means adjustable to vary the relation of the stationary contact to the armature.

5 A circuit interrupter according to claim 3 in which the armature is hingedly attached to a bracket clamped against a frame side by screws which attach an end of the bridge to that frame side, the hinge bracket having slots elongated in a direction parallel to the core, said slots receiving said screws whereby the hinge bracket is adjustable to vary the relation of the armature to the core.

6. A circuit interrupter according to claim 3 in which the bridge carries an L-shaped bendable metal member providing an adjust able stop engageable with the armature to variably limit movement of the armature away from the core.

7. A circuit interrupter comprising a U-- shaped magnet frame, with parallel sides, a

core supported by the yoke of the frame and extending from the yoke in the direction of the frame sides, a npn-magnetizable bridge extending from one frame side to the other and having an opening for receiving the free end, of the core, a bracket attached to one of the frame sides and supportng an interrupter contact, an armature hingedly connected with the other frame side and supporting another interrupter contact, and means for attaching the bridge and bracket, and the bridge and armature support to the respective frame sides of the magnet, said bracket and armature support being movable relative to the frame sides and-bridge member.

8. A circuit interrupter comprising an open ended magnet frame supporting a core surrounded by a winding, each leg of the magnet frame adj ustably supportin one contact in cooperative relation with t e other, one of said contacts being movable and provided with adjustably resilient means for establishing one circult condition, and means responsive to the core and windings for establishing the opposite circuit condition.

9. A circuit interrupter comprising a magnet frame supporting a core surrounded by a winding, an armature pivotally supported by the frame, interrupter contacts, one of for urging the armature away from the core, and means for varying the eflect of the urging means and comprising a lever attached to the urging means and pivotally supported by the frame, means for turning the lever and means for clamping the lever to the frame in adjusted position.

In testimony whereof I hereto-affix my signature.

WILLIAM A. CHRYST.