公开(公告)号：US3594710A

公开(公告)日：1971-07-20

申请号：US3594710D

申请日：1970-01-27

Applicant: SQUARE D CO

Inventor： STANBACK HARRIS I

IPC: H01R9/22

CPC classification number: H01R9/22

Abstract: A system of components which can be grouped into sets for assembly in various configurations to provide electrical neutral bar assemblies of different shapes and having different numbers of neutral-wire-receiving openings. The system, which is particularly suitable for use with neutral wires of relatively large ampacity, includes a plurality of insulating bases, a plurality of neutral bars of different lengths, and an interconnecting plate. One or more of the bases and one or more of the neutral bars with or without the interconnecting plate are arranged to be secured together in different configurations by bolts.

公开(公告)号：US3594526A

公开(公告)日：1971-07-20

申请号：US3594526D

申请日：1969-01-17

Applicant: SQUARE D CO

Inventor： SWINDLER DAVID L

IPC: H01H9/44 ,  H01H33/59 ,  H01H33/18

CPC classification number: H01H9/443 ,  H01H33/596

Abstract: A pair of disc-shaped permanent magnets are held in complementary recesses on opposite sides of an insulating contact block by respective contact arms which carry stationary contacts. Direct current arcs formed when a bridging contact separates from the stationary contacts are driven by the magnets in opposite directions with roots of the arcs moving along respective conductive rims surrounding the magnets.

公开(公告)号：US3592985A

公开(公告)日：1971-07-13

申请号：US3592985D

申请日：1970-02-06

Applicant: SQUARE D CO

Inventor： ARNEBERG DON J ,  GRIBBLE JOSEPH J

IPC: H01H50/32 ,  H01H9/20

CPC classification number: H01H50/323

Abstract: An inexpensive mechanical interlock for two switches that are mounted on a common support plate. The interlock consists of a single member which is mounted in a space between the two switches when the switches are mounted adjacent to each other on the support plate. The member has a pair of bearing portions received in recesses in the adjacent walls of the switches and a pair of actuating portions that are engaged by inclined surfaces on portions of the movable contact carriers of the two switches to prevent a concomitant operation of the switches to a circuit closing position.

公开(公告)号：US3590352A

公开(公告)日：1971-06-29

申请号：US3590352D

申请日：1969-04-28

Applicant: SQUARE D CO

Inventor： RIES ROBERT G ,  RETZER KENNETH W

IPC: H02P7/298 ,  H02P5/06

CPC classification number: H02P7/298

Abstract: A speed control circuit for a series field direct current motor. The circuit includes a reed relay that has a movable contact responsive to the current flow through the field and a resistance in a shunt circuit with the field. The reed relay through a transistor and a contactor causes the shunt circuit to be interrupted when the current flow through the motor increases above the predetermined value. The reed relay has a pair of coil windings arranged so that one of the windings generates a magnetic flux that opposes the flux generated by the current flow through the field and the other provides an output flux which adds to the flux generated by the field current so that movable contact will operate with a snap action. The flux outputs of each of the pair of coils is individually adjustable so the response of the relay to the upper and lower limits of a range of field current flow may be individually adjusted. The circuit further includes a capacitor which will cause the flux output of one of the coils to momentarily increase when the reed relay initially responds to an excess current in the field circuit.

公开(公告)号：US3590278A

公开(公告)日：1971-06-29

申请号：US3590278D

申请日：1969-09-15

Applicant: SQUARE D CO

Inventor： BURG DENNIS ,  DEER BROWN

IPC: G05F1/45 ,  H02M5/257 ,  H03K17/00 ,  H03K17/26

CPC classification number: H02M5/2573 ,  G05F1/452

Abstract: A circuit for controlling the duration and intensity of current flow through a resistive load, such as a heat sealing element in a plastic bag sealing apparatus. The circuit includes an inexpensive circuit for synchronizing the initiation of conduction of a triac or silicon-controlled rectifier with reversals in polarity of an alternating voltage source so that the load is supplied with a series of pulses of current each having the same magnitude and a circuit which is controlled by the synchronizing circuit and uses the reversals in flux in a transformer to decrease the duration of firing current pulses to a control electrode of the triac or silicon-controlled rectifier from a discharging capacitor.

公开(公告)号：US3590200A

公开(公告)日：1971-06-29

申请号：US3590200D

申请日：1969-12-17

Applicant: SQUARE D CO

Inventor： RYS TADEUSZ J

IPC: H01H9/10 ,  H01H9/02

CPC classification number: H01H9/10

Abstract: An electrical switch arranged to be mounted on the rear wall of a switch box and having a base open at the front and rear with a partition wall between the front and rear. A blade-operating rotor is installable in the base from the rear and held in operating position behind the partition wall initially by a snap spring detent to facilitate installation of the base on the rear wall. Once installed, a flange on the rotor cooperates with the rear wall to retain the rotor in operating position should the spring fail. The load and line connectors are mounted on the front face of the partition wall for ready access when the front of the switch box is open. The switch blades and companion stationary contact jaws are carried by the base at the rear of the partition wall, and are drivingly engaged by the rotor. The blades are arranged relative to the contact jaws, rotor, and base so as to provide a wider contact separation upon opening of the switch than is usual in switches of comparable size.

公开(公告)号：US3562469A

公开(公告)日：1971-02-09

申请号：US3562469D

申请日：1968-11-18

Applicant: SQUARE D CO

Inventor： PECK RONALD G

IPC: H01H71/52 ,  H01H3/20 ,  H01H9/20

CPC classification number: H01H71/525 ,  H01H2300/046

Abstract: The circuit breaker has three ganged movable contact arm structures movable as a unit between open and closed positions by a spring-powered toggle mechanism coupled to a center one of the contact arm structures. The toggle mechanism includes a releasable cradle member which is released upon overload or a fault to permit the toggle mechanism to drive the contact arm structures to open position. A manual operating mechanism is provided for resetting the toggle mechanism when the contact arm structures are in the contact open position and for releasing the reset toggle mechanism for effecting closure of the contacts. During the closing operation, the cradle member interlocks with a latch on the center contact arm structure until the manual operating mechanism defeats the interlock by bending the latch by a camming action.

公开(公告)号：US3550048A

公开(公告)日：1970-12-22

申请号：US3550048D

申请日：1969-07-23

Applicant: SQUARE D CO

Inventor： STALLMAN JAMES E

IPC: H01H50/30 ,  H01H3/60

CPC classification number: H01H50/305

公开(公告)号：US3542237A

公开(公告)日：1970-11-24

申请号：US3542237D

申请日：1968-07-01

Applicant: SQUARE D CO

Inventor： BUTLER DE FOREST D

IPC: H02G3/18 ,  H02G3/08

CPC classification number: H02G3/185

公开(公告)号：US3489974A

公开(公告)日：1970-01-13

申请号：US3489974D

申请日：1968-05-27

Applicant: SQUARE D CO

Inventor： MONTROSS ROBERT C

IPC: H01F30/10 ,  H01F38/30 ,  H02H3/087 ,  H01F40/00 ,  H01F17/06 ,  H01F27/28

CPC classification number: H01F38/30 ,  H01F30/10 ,  H02H3/087