Abstract: Pulse push-button which includes a tubular pusher member guided in translation through a cylindrical body and acting on electrical contacts. The pusher member is fitted with a cam that operates in conjunction with the active section, for example an elbowed tip, of a hairpin-shaped spring. The cam has at least one reversing point and the adjacent wall of the pusher is also fitted with a step member that allows the active section of the spring to strike the bottom of the step when the elbow passes over the step.

Abstract: In a half-bridge self-exciting switching power supply, an over-voltage detector receives the power supply output and generates an over-voltage signal when the power supply output exceeds a preset limit. An over-voltage cut-off circuit is connected to a pulse-width-modulated controller and a driving unit of the switching power supply. The over-voltage cut-off circuit applies a pull-down voltage to the driving unit so as to inhibit self-exciting operation of first and second self-excited switching circuits of a half-bridge self-excited circuit, and disables the pulse-width-modulated controller upon reception of the over-voltage signal from the over-voltage detector. Therefore, when the pulse-width-modulated controller or the driving unit becomes defective, the switching power supply can be cut-off automatically in order to prevent damage to a load and to the other components of the switching power supply.

Abstract: The invention relates to a steering column switch which should, with a uniform construction, be easily adaptable to different switching tasks. The invention is operated, in an optional manner, by means of microswitches which can be inserted into a mounting cavity of a carrier unit (2), whereby the cavity is positioned in the area of the grip handle (1) of the steering column switch. Advantageous further developments describe additional possibilities for the activation, independently of the rotational movement of the grip handle (1), of additional microswitches (16, 22) by means of an activation knob (23) in the activating element (1), or by means of the longitudinal movement of the grip handle (1) of displaceable contact parts (15, 22).

Abstract: A circuit breaker handle is provided with a curved bearing surface at its pivot point. The handle bearing surface has a substantially constant radius and is connected to the body of the handle with a necked down handle extension. The handle extension has a width that is less than the width of the curved bearing surface at the point of connection between the bearing surface and the necked down region. The handle pivot mates with a corresponding bearing surface on a notch in the side plate that it pivots within. The arc of the curved bearing surface in the side plate is greater than that of the corresponding bearing surface on the handle and captures the handle pivot within the notch in the sideplate, so the handle cannot lift off the bearing surface on the notch as it is moved.

Abstract: A combination switch is provided with a movable knob and a contact assembly. The movable knob is rotatable with respect to a lever base and has a movable contact. The contact assembly includes a holder, a volume plate and a rivet. The holder has a bottom portion opposite to the movable contact, a cylinder portion projecting from the bottom portion and fixed to the lever base, and a terminal plate fixed within the bottom portion. The volume plate is disposed on the bottom portion of the holder, and has a fixed contact slidably in contact with the movable contact. The rivet fixes the volume plate on the bottom portion, and electrically connects the fixed contact with the terminal plate. As mentioned above, a reliability and an assembling characteristic are improved by assembling between the volume plate and the holder, and between the volume plate and the rivet.

Abstract: An electrical control or signaling device such as a push button or lamp includes a body which is fixed on a support wall and a baseplate for receiving contact blocks. The baseplate 20 houses a slide 30 and a manipulation screw having arms 33 and 34, acts on the slide 30 to translate the slide. The arms 33 and 34 have sharp edges or points (A1, A2) which act against the support wall and are displaced within a plane (P3) which is perpendicular to the plane S of the wall.

Abstract: An elastomeric switch is provided having self cleanings contacts. The switch includes a substrate and a switch actuator configured for reciprocating motion along an axis generally perpendicular to a surface of the substrate. A first switch contact, including a contact surface generally perpendicular to the actuator axis of motion is, carried by the switch actuator. A second switch contact is cantilevered from the surface of the substrate. Reciprocation of the actuator in a first direction toward the substrate acts to force the first contact against the distal end of the second contact. The two contacts are deflected together as result of further reciprocation of the actuator in the first direction. As the contacts are deflected, the distal end of the second contact is scraped across the contact surface of the first contact, thereby removing contaminants and other debris from the contact surface of the first contact.

Abstract: A safety switch including a spring-loaded tappet axially displaceably disposed in a switch cover; a switching bridge on the tappet; and an actuator above the tappet. An essentially U-shaped element has a center web and a first and second leg. The element is swivellably disposed in the cover in the area of the center web and the first leg of the element engages the tappet. The second leg is situated above the tappet such that when the actuator has moved in, the second leg reaches behind and engages the actuator in a switch-on position and permits a complete pulling-out of the actuator from the cover only in a switch-off position.

Abstract: A trip link structure for a circuit breaker is disclosed and includes a plurality of circuit breakers arranged in a triangle shape and each having a fixed contact point and a movable contact point formed therein for thereby forming one unit including three circuit breakers as one unit with respect to three phases and an operational rod connected with the movable contact point, a main body engaging plate engaged to a front surface of the circuit breaker of each phase, a support bracket engaged to a front surface of each phase of the main body engaging plate, an operational link plate having a first connection portion hinged to the operational rod and a second connection portion supported by the first connection portion of a support bracket, a connection link having an upper end hinged to a third connection portion of the operational link plate connected with the circuit breaker of the upper side for thereby being downwardly extended and a lower end hinged to the third connection portion of the operational link

Abstract: A rotary switch has a control knob (3) that is mounted on at least three balls (6) that move, guided by a cage disk (7), in a housing groove (8) formed by a radial wall (9) and an axial wall (10), against which the balls (6) are urged by an outward or inward conical bearing surface (11) or (12). The radial and axial wall bearing surfaces have contact segments and contact paths (13, 14) that are shorted by at least one of the balls (6). The control knob has a stop lug (15), an operational adjustment angle (4) of which is limited by housing lugs (16) and which, during operational adjustment, contacts at least one of two stop lugs (17) of the cage disk, which are positioned at an angle that corresponds approximately to one-half the maximum operational adjustment angle (4) and to a maximum contact adjustment angle (5). This structure results in reduced cost and functional improvement.

Abstract: A knob positioning structure comprises a rotary switch shaft, to which a knob is mounted, the rotary switch being mounted in a depression in an enclosure, within which are formed detent points. A threaded hole is formed in the end of the shaft onto which the knob is to be mounted, and outer serrations are formed around the end of the shaft. The knob has a knob mounting screw hole through which a knob mounting screw can be passed, a knob stopper which mates with a detent point in the depression of the enclosure, and inner serrations, which mate with the outer serrations of the shaft. The knob is mounted to the shaft by inserting a knob mounting screw, via a spring, through the knob mounting screw hole and into the threaded hole in the shaft, enabling a sliding motion between the knob and the shaft in the direction of the shaft axis.

Abstract: An electrical switch selectively controls an ignition circuit and accessory circuits of a motor vehicle. The electrical switch includes a segmented rotatable member with radially extending side walls having cam surfaces formed thereon for operably actuating electrically conductive leaf spring members to individually open and close electrical circuits in response to positioning the rotatable member in predefined angular positions. A segmented, asymmetrical rotary actuator and housing assembly permits placement of the switch in close proximity to other system components.

Abstract: In a push button switch, a movable contact plate has an upwardly arcuated movable contact, a pair of side plates at both sides of the movable contact, each side plate has a plurality of downwardly projected permanent contacts, and each of the permanent contacts has a most lower point, a fixed contact plate comprises a pair of first fixed contacts contacted with the most lower points of the permanent contacts, and a second fixed contact disposed between the first fixed contacts, so as to be contacted with the movable contact.

Abstract: An electrical switch has a snap action blade with a contact pad. The snap action blade levers between a first configuration at which the contact pad is remote from a stationary contact and a second configuration at which the contact pad abuts the stationary contact. An actuator moves the snap action blade between the first and second configurations. A reset latch has a first position in which a catch coupled to the snap action blade can engage the reset latch to hold the snap action blade in one of the first and second configurations, and has a second position at which such latching does not occur. A manual reset actuator is provided to release the catch from the reset latch. A reset selector determines whether the reset latch is in the first or second position and thus whether the switch is in an automatic reset mode or a manual reset mode.

Abstract: A push button switch assembly and method according to which a button is mounted to a partition and has at least one hook for engaging a ledge of the partition. At least one post extends from the button and through an opening in the partition and is fastened to the partition for mounting the button to the partition for pivotal movement which is limited by the engagement of the hook with the ledge. A membrane switch is mounted on the partition, and a bumper extends from the button for engaging the membrane of the switch to activate same. The bumper is fabricated from a silicone rubber to minimize the effects of relatively large pushing forces acting on the button and to enable the assembly to be used in relatively low temperature environments.

Abstract: The large close spring in the operating mechanism of electrical switching apparatus is charged by a charging mechanism which includes a charging cam mounted on a cam shaft and rotated by a ratchet wheel. An elongated handle is mounted for rotation about a pivot axis offset laterally from the cam shaft. A drive link which successively engages the teeth on the ratchet wheel is pivotally connected to the handle at a point closer to the handle pivot axis than the radius of the ratchet wheel to increase the mechanical advantage of the handle. A common spring biases the drive link and a stop dog against the ratchet wheel. A turned pin on the drive link is used to engage the ratchet teeth which have an arcuate profile including a radius at the root configured to be engaged by the turned pin. A similar drive link with a turned pin to engage the ratchet teeth is reciprocated by an electric motor.

Abstract: A waterproof switch device includes a tubular housing with a through hole and front and rear barriers, which are disposed at two sides of the through hole and which have insert recesses. A switch body is inserted into the tubular housing, and is provided with a spring-loaded push button protruding out of the through hole. A tubular elastomeric member is sleeved and engages tightly the tubular housing between the barriers. A protrusion is vaunted from the elastomeric member to mate and receive the push button. A resilient retaining sheath member has two opposing lateral ends and an inner abutment wall between the lateral ends. The inner abutment wall mates and clamps the elastomeric member. Two inserted portions extend from and are outboard to the lateral ends respectively, and are fitted retainingly in the insert recesses so as to retain tightly the elastomeric member on the tubular housing.

Abstract: A center shaft (2a) for holding a key top (1), and springs (2b) are provided in a casing (2) of a small-sized electronic equipment such as an inter-call receiver. The springs (2b) are provided so as to extend from the peripheral portions toward the center shaft (2a), and holes are formed in the springs (2b) respectively. The key top (1) is provided with a stopper nail (1a), first protrusions 1b and second protrusions 1c. The protrusions (1c) of the key top (1) for pushing switches (3) are inserted through the holes of the springs (2b) respectively, and the stopper nail (1a) of the key top (1) is engaged with the center shaft (2a) acting as a fulcrum during the seesawing operation of the key top (1). Thus, the key top (1) is held in a stable manner. The existence of the center shaft (2a) prevents simultaneous depression of the two switches (3).

Abstract: Electrical switching apparatus such as a power circuit breaker, network protector or switch has a self-supporting operating mechanism module including a cage formed by a pair of side plates rigidly clamped in spaced relation by spacers. The cage supports all of the operating mechanism components including a helical compression close spring mounted fully between the side plates and coupled to a cam member through a rocker in a manner which maintains the forces longitudinal to the spring. The cam member has a charging cam with a charge profile for compressing the close spring and a close profile through which the spring drives the cam member to effect a controlled release of stored energy to close the contacts of the apparatus. A close prop, spring biased to an unlatched position, is latched to secure the close spring in the charged state by a latch assembly reset by a reset lever separate from the close prop which in turn is reset by rotation of the cam member during charging.

Abstract: This relates to a device consisting of a first plurality of light sources that light only when the voltage of a storage battery in a storage battery-generator system is below a predetermined voltage value, which is between the nominal voltage value of the storage battery and the charging voltage value of the storage battery-generator system, indicating that the battery is not receiving charge. A second plurality of light sources that light only when the voltage of a storage battery in a storage battery-generator system is above a predetermined voltage value, which is between the nominal voltage value of the storage battery and the charging voltage value of the storage battery-generator system, indicating that the battery is receiving charge.