Abstract: The present invention relates to a structure of contacts for an air circuit breaker, in which a movable contact arm can be stably brought into contact with a fixed contact arm by changing an applying direction of an electromagnetic repulsive force generated between a movable contact and a fixed contact, and, to this end, the structure, which includes the fixed contact arm having the fixed contact, and the movable contact arm having the movable contact and rotatably installed to be brought into contact with or separated from the fixed contact arm, is configured such that the fixed contact and the movable contact have contact surfaces, respectively, disposed in an inclined manner, and a line commonly passing the contact surfaces of the fixed contact and the movable contact forms an acute angle with respect to a line passing through a center of a longitudinal axis of the movable contact arm.

Abstract: The present invention is directed to a safety system integrated into a liquid-insulated high voltage network grounding switch, including modifications to the switch structure to provide an arrangement that is more efficiently installed with greater precision than found in conventional arrangements. The result is a switch assembly that adheres to updated IEEE/ANSI Standards, while still fitting into existing vault space meant to accommodate earlier switch gear.

Abstract: A circuit breaker includes a housing, a stationary pole member fixedly mounted in the housing, a moveable pole member shiftably mounted within the housing, and a drive shaft mounted to the housing and operatively connected to the moveable pole member. An inertia latch stop member is mounted to the housing adjacent the drive shaft and an inertia latch is operatively connected to the drive shaft. The inertia latch is configured and disposed to extend from the drive shaft and engage the inertia latch stop member in response to a change in direction of rotation of the drive shaft from an opening direction to a closing direction following a trip event.

Abstract: An electrical switch is disclosed for switching an electric current, the switch being suitable for being inserted into a switch holding device. In at least one embodiment, the switch includes a locking device which, in the event of an overcurrent, moves a locking element of the locking device to a position which mechanically locks the switch in the switch holding device.

Abstract: A rotary control device includes a body, a knob rotatably provided on the body, a push button provided on a side portion of the knob so as to be depressed, a lock member that moves in response to a depressing operation of the push button, and a lock portion provided in the body. The lock member is retained to the lock portion of the body so as to restrain a rotary operation of the knob before the push button is depressed. When the push button is depressed, the lock member is moved to a space where the lock member is movable in conjunction with the rotary operation of the knob so that a restraint of the rotary operation of the knob is released.

Abstract: A circuit breaker with a short circuit self-locking function, a short circuit self-locking mechanism is disposed in the circuit breaker, and comprises a self-locking mechanism and a reset mechanism. As the circuit breaker is opened, it cannot be directly closed, whereby reminding an operator of a short circuit fault.

Abstract: A remotely configurable control lever is disclosed for operating an electrical switch on the control panel of an agricultural vehicle. A cam plate 22 rotatable with the control lever has a cam track 23 defining at least one notch, which is selectively engaged by a resiliently biased detent 24 to latch the control lever in a predetermined position. A solenoid 32 is provided for retracting the detent to allow the control lever 10 to return to a neutral position. A second cam track 123 is provided which is rotatable with the control lever 10 and defines at least one stop cooperating with a further retractable detent 124 to limit the range of angular displacement of the control lever 10.

Abstract: A switching mechanism has first and second contacts, an elastic member, and a stopper. The first and second contacts are electrically connectable with each other. The operation of the first circuit is switched by electrically connecting the first and second contacts. The stopper maintains the elastic member in an elastically deformed state. At least a part of the stopper is capable of disintegrating by contact with a predetermined liquid. The elastic member recovers from deformation as at least of a part of the stopper disintegrates, and thereby displaces the second contact such that the second contact gets electrically connected to or disconnected from the first contact.

Abstract: In a circuit breaker, a rotary-operating handle is linked with an opening and closing mechanism via a driving gear so that main circuit contacts can be opened and closed by rotating an opening and closing lever. A vertically moving handle lock lever is arranged between a tip of the opening and closing lever and the driving gear directly coupled to the operating handle, so that when the main circuit contacts are opened after being welded, the lock lever abuts against the driving gear to restrain the operating handle to the vicinity of the ON position, thereby restricting the movement to a contact-open indicating position. Further, an upward-inclined surface is formed in a stopper section located at a tip of the lock lever, so that if the contact welding is not severe, the lock lever can be pushed down to forcibly open the contacts.

Abstract: A combination air circuit breaker bell alarm reset and lock-out accessory unit interacts with the circuit breaker closing system to prevent charging of the circuit breaker closing spring until and unless the bell alarm module has been manually reset in one option and allows automatic reset of the bell alarm module prior to charging of the closing spring in a further option. The orientation of the bell alarm module on the combination reset and lock-out accessory unit support plate determines the reset or lock-out option selection.

Abstract: A high output level is maintained in power supplies having multiple cells in each leg. Failed cells in any leg are bypassed to provide a current path through the respective leg. All of the unfailed cells are utilized while maintaining equal magnitude between phases and a balance phase relationship in the line-to-line output voltage. The invention may be utilized in conjunction with a peak voltage reduction circuit, and a by-pass switch.

Abstract: A push-button switch including a sliding member, a lock pin for locking the sliding member at a certain location, a heart cam including a lock cam along which the lock pin slides, and a movable stopper member, disposed at the heart cam, for holding the lock pin in a lock position as a result of cooperating with the lock cam or for unlocking the lock pin. The push-button switch incorporates a self-restoring function, wherein friction between the lock pin and the lock cam during an auto-off state is reduced to decrease the amount of force required to unlock the lock pin, thereby reducing the solenoid actuating current, and simplifying the actuating structure, as a result of which a more reliable product with a longer life and a smaller size can be produced.

Abstract: An extractable circuit breaker is equipped with an operating lever which can take at least three positions: an inoperative position, an opening control position in which operating lever operates in conjunction with an opening latch of the circuit breaker, and a closing control position in which it operates in conjunction with a closing latch of the circuit breaker. When the circuit breaker is in the plugged-in position, the operating lever is inoperative. When the circuit breaker leaves its plugged-in position, the operating lever operates in conjunction with a countergear lever supported by the fixed frame accommodating the circuit breaker and performs opening of the poles of the circuit breaker. When the circuit breaker passes beyond its plugged-out position in the extraction direction, the operating lever moves from its inoperative position to its opening control position and then to its closing control position, causing opening followed by closing of the poles.

Abstract: An air circuit breaker bell alarm unit allows selection of both bell alarm accessory lock-out facility along with automatic reset function. A plunger extending from the bottom of the bell alarm accessory interacts with the circuit breaker operating components to automatically reset the bell alarm pop-up target in the early stages of the closing of the circuit breaker contacts or to lock-out the closing of the circuit breaker contacts until the pop-up target is manually reset.

Abstract: An air circuit breaker closing spring charging mechanism includes a ratchet and pawl whereby the closing spring charging gear is protected from damage due to reverse rotation of the ratchet when the charged closing springs are later released. A locking latch prevents damage to the charging mechanism components and a latch release lever allows the charging mechanism to return to an operative position when the closing springs are later charged by a manually operated charging handle.

Abstract: A rotary electronic device such as a rotary encoder is provided which includes a rotor, a push/turn operating shaft, and a rotary sliding member. The rotor provides electric signals in response to rotation of the push/turn operating shaft and has formed therein a through hole consisting of a circular hole and a cross-shaped hole. The push/turn operating shaft includes a small diameter end portion and a cross-shaped portion engaging the cross-shaped hole of the rotor for rotating the rotor according to the rotation of the push/turn operating shaft.

Abstract: A detent mechanism comprising a support member having a fixed seating member comprising opposite sides; a first spring for exerting a first spring force, disposed between one side of the fixed seating member and a first sliding member, further comprising a second spring member exerting a second spring force less than said first spring force, disposed between the other side of said fixed seating member and a second sliding member, whereby the forces of the springs are directed to operate on said first and second sliding members in opposite directions. A push button can apply an external force to the first sliding member to move it from a first position relative to the fixed seating member to a second position against the action of said first spring force. A detent mechanism connects the first and second sliding members when the first sliding member is in its second position and the second slidable member is in a first position.

Abstract: An electrical switch having a switching lever for actuating a slide which receives at least one contact bridge, and having an enabling slide which is active in the inserted position. The technical problem is to provide a switch whereof the switching lever only enables effective switching once the enabling slide is in the inserted position. Moreover, in the ON position, the switch is to have a hysteresis so that compensation movements of the switching lever are permissible. Finally, the contact bridge is to perform a sliding movement on the fixed contacts in order to clean the fixed contacts. The enabling slide has a bearing point for the switching lever which is active in the inserted position. A push rod (24) is guided linearly, is moved by the switching lever and comes into engagement with a profiled guide of the slide. In the ON position, on pivoting into a latching step, the slide and the contact bridge perform a transverse movement on the fixed contacts of the contact springs.

Abstract: A device controls a switch by means of at least two buttons. The device has at least two buttons acting on levers, each having an end that can bear against the plunger of the switch. The device is particularly applicable to food processors.

Abstract: An auxiliary trip device for a circuit breaker which includes an electromechanical actuating device and an energy storage system. The electromechanical actuating device includes a coil housed in a sheath which has a central bore containing a plunger fixed to a push-rod, and a fixed core spaced apart from the plunger, via a first spring. The push-rod is slidable within the bore to actuate a latch device of the energy storage system, which in turn releases a blade which is cooperable with a trip bar of the circuit breaker on which the auxiliary trip device is placed. The blade is biased by a second spring which releases and stores energy greater than released and stored energy of the first spring.

Abstract: The disclosed slide action selector switch, which is adapted to switch the connections of four push button switches between left and right mirror motors, comprises an insulating plate with an elongated guide flange projecting therefrom and having a T-shaped cross section. First and second sets of electrical contacts are mounted along the plate on opposite sides of the flange for sliding engagement by first and second contactors on an insulating carriage having a T-shaped channel slidably receiving and interlocking with the flange. Springs are provided on the carriage for biasing the contactors against the contacts while biasing the carriage away from the plate. A detent ball is disposed in a seat formed in a leaf spring on the carriage and is biased by the leaf spring against the flange for reception in successive detent recesses therein.

Abstract: The invention relates to a contact arrangement, particularly intended for current-limiting low-voltage circuit breakers, with a double-break movable contact arm, the central part of which is attached to an insulating shaft which is rotatably journalled in elongated holes in stand parts on each side of the contact arm. In the closed position of the arrangement, the movable contact arm is pressed against two U-shaped fixed contact arms with the aid of two torsion springs. The contact arms have flat shape and are arranged with their broad sides facing each other. The shaft consists of two sleeve-formed holders surrounding the torsion springs. One holder exhibits a stop face for a latching member for arresting the movable contact arm in the open position.

Abstract: An accessory module (104) for use with a circuit breaker (10) is configured for mounting to the breaker, and has a rotor (142) which follows the movement of the circuit breaker blade (24) in the breaker by means of a coupling member (118) passing through a passage (110) in the circuit breaker wall. A portion of the rotor is configured as a cam (162) operating a switch (152) in the module, the switch thus giving a reliable indication of the position of the breaker blade. The breaker is preferably of the type which has a trip lever (50) carried on the breaker blade and mounted for slight movement thereon, and the rotor is preferably coupled to the trip lever. A solenoid (148) within the accessory module is disposed to rotate the rotor when energized, this rotation being coupled to trip the breaker to provide for remote tripping. Since the trip lever is carried with the breaker blade, the blade position is monitored by the switch.

Abstract: An assembly frame having first and second frame plates secures the movable parts of a breaker assembly together for ready assembly of the breaker assembly in a housing. A pivot pin supports the trip lever between the frame plates. The movable contact carrying blade has an elongated hole through which the pivot pin passes, the elongated hole forming a floating point for the pivot pin.

Abstract: An improvement for an electrically powered appliance (1) having an "ON-OFF" switch (7) which must be manually maintained in the "ON" position. A locking mechanism (11) includes a lever (25) slidably coacting with a switch button (9). The lever moves from a first position to a second position as the button is manually moved from the "OFF" to the "ON" switch position. When the lever reaches its second position it blocks the button from returning to the "OFF" switch position when manual force is removed.

Abstract: An electric switch with a set of stationary contacts and a set of movable contacts situated on a contact bridge (30) between an IN-position and an OUT-position includes a forcibly guiding mechanism (32) for manual handling of the contact bridge (30) and an ejector mechanism (56) and a trip device (74) co-operating with the ejector mechanism, whereby the contact bridge (30) is automatically longitudinally displaced from its IN-position to its OUT-position when an overloading, a fault or a signal current is present. The forcibly guiding mechanism (32) and the contact bridge (30) are interconnected by means of a releasably blocking device in such a manner that the ejector mechanism (56) in the releasing state need only overcome frictional forces between the stationary and the movable contacts as the blocking device is released by means of the trip device (74).

Abstract: An apparatus has a part which can be moved to an operating position by an actuating device, in response to movement of a button to an on position. Upon movement of the part to its operating position, a latching member directly associated with the part latches the button in its on position. Upon sensing a predetermined condition in the apparatus, a control member prevents the transmission of the actuating movement by the actuating device to the part, and a user becomes aware that the part has not moved to its operating position because the button does not become latched in its on position.

Abstract: A circuit interrupter comprises a pair of separable contacts at least one of which is movable, and an operating mechanism operatively connected to the movable contacts for opening and closing the contacts. The operating mechanism includes a movable contact arm having mounted thereon the movable contact, a latch lever pivotally mounted on the movable contact arm, and a toggle link mechanism connected at its one end to an operating handle and the other end of which is directly engageable with said movable contact arm and the latch lever. The movable contact arm has a latch surface, and the latch lever has a latching end which, in cooperation with the latch surface, releasably catches the other end of the toggle link mechanism. A roller may be mounted on the other end of the second toggle link for quick and smooth operation of the operating mechanism.

Abstract: A plug-in electric switch which includes a mobile unit and a fixed unit, the fixed unit having a recess and a spring biased sliding plate, the mobile unit including a contact arm and main contacts, secondary contacts carried by both the mobile and the fixed units, a rod slidably mounted relative to and carried by the mobile unit, the rod having an end with an inclined face adapted to contact an inclined face of a slidably mounted latch, spring biasing the latch in a direction to maintain the faces in sliding contact, and another spring normally biasing the rod in a direction toward the contact or support arm such that when the main contacts are closed the mobile and fixed units are prevented from being disengaged or re-engaged and at a partially engaged position the main contacts cannot be closed.

Abstract: The present invention describes an air circuit breaker including, in combination, a rotational shaft connected with a motor, a cam which rotates in one direction through a ratchet by a handle operation to accumulate energy in an energy accumulating spring for contact closure, an engaging part provided on the outer periphery of the rotational shaft, and a latch which slides on and along the engaging part of the rotational shaft such that the latch means remains disengaged from the engaging part when the cam is rotated by the handle operation so that the rotational shaft remains stationary, and which causes the cam to rotate together with the rotational shaft by engaging the engaging part of the rotational shaft when the rotational shaft is rotated in one and the same direction by the driving motor.

Abstract: A keyboard, particularly for control of electronics in vehicles, has at least one key mounted in a recess in the keyboard and pivotable about a pivot to press against a shaped portion of a rubber gasket to operate an electrical switch. A display, preferably a multiple character LCD, for labellingthe switch is visible through a transparent member and connected to a p.c.b. by zebra striped members. The display is not obscured by a finger operating the key. The key has a transverse bore in which a compression spring is mounted with balls at the end of the spring to co-operate with stepped generally cylindrical members mounted with their axes perpendicular to the pivot pin and forming detent means to give the key a tactile operation. Preferably the key operates three switches by way of three shaped portions.

Abstract: An operator (10) having a lock releasing key (10a) formed thereon is removably coupled to a pivoted actuator (6) by resilient tabs (10d) depending from the operator which are cammed outwardly over the actuator during coupling operation and which engage with undercut surfaces (6e) in the actuator when the operator is fully seated upon the actuator. The tabs (10d) seated at one end of the actuator align with formations (4e) in the housing (2, 4) in the ON position of the actuator to prevent outward camming movement of the respective tabs, thereby preventing removal of the operator in the ON position.

Abstract: A slide switch mechanism having a guide member and a slide member slidable along the guide member, in which the mutually contacting faces of the members have projections or recesses for mutual positioning of the member. The slide member can also be assembled in a reversed manner in the guide member, and at least one of the faces coming into contact in such inverted assembly of the slide member has additional projections or recesses so that the slide member can have different positions from those in the normal assembly of the slide member.

Abstract: A switch machine which is connected by two throw rods to the respective switch points to be operated includes an internal locking arrangement which includes two holding elements pivotally mounted on the respective throw rods and accommodated between a sliding member and a displacement member of the switch machine which are disengageably connected to one another. Each of the holding elements has a free end which is enlarged by two tongues respectively extending toward the sliding member and the casing of the switch machine. Depending on the position of the sliding member, the tongues are received in the associated recesses in the sliding member or in the casing to thereby either lock the throw rods in their positions relative to the casing or to entrain the same for movement with the sliding member.

Abstract: A plastic rocker is pivotally mounted in a plastic switch case and operates a conventional movable contact. The rocker has depending sides or legs which resiliently bend inwardly as a result of contacting abutments on the inside walls of the switch case providing a more positive action to hold the rocker and movable contact more securely in the various switch positions.

Abstract: A circuit breaker with an anti-bounce mechanism characterized by separable contact means operable between open and closed positions and including a cross bar, an operating mechanism releasable to effect movement of the contacts and comprising a link connected to the cross bar, means for preventing bouncing of the cross bar when the contacts are open and comprising a stop member engageable with the length.

Abstract: In an electrical switch including a housing and a button, which button, by means of a manual depression thereof in a single direction, is movable relative to the housing between two positions defined by a setting mechanism, and which mechanism comprises a setting rod one extreme end of which is guided by a slot or groove having two fixing points, the setting rod is embodied like an unequal-armed lever. The longest arm of the lever is allocated said two fixing points whereas the shortest arm is teetably supported in a through-hole of the button. The direction of the hole in the button is substantially perpendicular to the direction of movement of the button, and the rocking point of the lever or rod is situated in a housing wall. In comparison with prior art switches, the switch of the invention exhibits extremely reduced travel or stroke of the button.

Abstract: In an illuminated rotary electric switch, for use in a motor vehicle to indicate the location of the switch, its condition of operation, and, if desired, its function, a manually rotatable switch member is provided with a central opening arranged so that light can be projected longitudinally therethrough from a single light source so as to indicate the location of the switch (and its function, if desired) and with a further opening which can be brought into and out of registration with an aperture in a fixed portion of the switch through which light from said source can be projected laterally, so as thereby to uncover or mask said aperture and thus indicate the condition of operation of the switch.

Abstract: A pivoted-actuator safety switch of the type having a spring-biased lock lever within the sub-actuator that extends out to catch beneath the rim of the hole in the switch frame or housing to lock the pivoted-actuator in its "off" position, and a removable insertable actuator, covering the sub-actuator, has a projecting cam effective when inserted to retract the lock lever to allow normal operation, but removal thereof prevents unlocking of the sub-actuator and thus prevents operation from "off" to "on". A half-guard integral with the frame guards the actuator in "off" position to meet the "palm test", that is, it cannot be turned on accidentally by bumping or striking with the palm of the hand, while providing open access to the actuator in its "on" position so that it can be quickly turned off. This half-guard consists of upstanding plates integral with the frame on opposite sides of and extending higher than the actuator in "off" position.

Abstract: A modular vault type load break switch wherein the switching assembly is carried within an oil filled vault such that the operation of the switching mechanism is independent of the vault structure. The switching contact mechanism employs a positive actuator which is energized by the operator and contact movement effected by a remotely controlled mechanism independent of operator contact.