Abstract: A motor comprises an armature, first and second commutators disposed at either side of the armature, first and second amateur coils wound on the armature through commutator pieces in a double winding back alpha type, and first and second stator coil groups respectively connected through brushes to first and second commutators. A first circuit formed of the first stator coil group, the first commutator, and the first armature coil is connected to a second circuit formed of the second armature coil, the second commutator, and the second stator coil group, in series or in parallel corresponding to a high voltage or a low voltage applied to the motor, thereby the motor shows the same output power without relation to the voltage applied thereto.

Abstract: In one aspect of the present invention, a contactless inductance switch is disclosed for use with a joystick. The switch is mechanically connected to a mass which is movable between a first and second position. When an operator presses the switch, the mass moves to the second position adjacent to an electrical circuitry. Sensing circuitry measures the change in inductance in the coil and produces a control signal indicating that the switch was pressed.

Abstract: A switch module includes a plurality of individual switches (2), each having a base (3), which are arranged next to one another in a common holder on the same plane. The bases (3) are embedded in a common base (4) produced by encapsulating in a plastic. The bases (3) can be fixed to one another before encapsulating by means of plug-in connecting parts. The common base (4) has fastening claws (5) arranged on both sides, the talon ends of which are designed as enlargements (6). The sealing surface (17) has no mold-parting flash.

Abstract: An improved structure of a socket switch is provided which includes a body housing (11), a contact point housing (12), and a rear clamping member (13). The contact point housing (12) has an internal chamber (15) on a bottom end and a substantially triangularly shaped switch member (14) having a shaft member (21) extending from opposing sides is insertable within a groove (19) of the contact point housing (12). The triangularly contoured switch member (14) has a first apex which is located in the path of an insertable plug for rotation of a second apex member from a first position to a second position to allow switching from a second contact member and first contact members (17, 18) to a second position where a third contact member (16) is contacted by the second contact member (17). The contact point housing (12) has a pair of pintle hooks (20) which secure the rear clamping member within the internal chamber (15).

Abstract: A three pole relay is shown which operates in response to the flow of normal operating current across fluorescent lamps to energize a coil which actuates a relay to open switches disposed in all of the filament lines associated with the lamp to shut off filament current while maintaining current flow across the lamps themselves.

Abstract: A method of manufacturing a contact block includes the processes of forming make contact pieces, break contact pieces, base pieces, and terminal pieces in a first hoop member by blanking, forming a first subcontact block having the break contact pieces and a second subcontact block having the make contact pieces by molding these pieces, forming movable contact spring pieces by blanking a second hoop member, aligning the second hoop member with the first hoop member and welding the movable contact spring pieces to the base pieces, cutting off the movable contact spring pieces from the second hoop member, and cutting off the first or second subcontact block from the first hoop member and aligning/coupling these subcontact blocks to each other. According to these processes, the respective components are held on a loop member up to the final process so that contamination and deformation of these components can be prevented.

Abstract: A multiple leaf spring interlock switch having a pair of contacts in each side of an A.C. supply inherently biased to open positions and operated to closed positions by a linearly reciprocably movable cam acting only against the biased of the contacts. A latch is operable to alternately latch and release the cam on successive operations to hold the contacts closed or released. An interlock system has plural slides coupled to a rotary cam which is in turn coupled to a lock member to block movement of the linearly movable cam when either slide is in a non-operated position and to release the latch when a slide is moved to a non-operated position while the cam is latched, such action also causing the rotary cam to separate the contacts. An energy storage and release mechanism provides non-reversible momentum for a depressible operation.

Abstract: A plunger operated switch having a normally closed pair of contacts and a normally open pair of contacts, the normally closed pair of contacts including a movable contact carried on the free end of a first cantilevered resilient leaf member biased to separate the contacts, the normally open pair of contacts including a movable contact carried on the free end of a second cantilevered resilient leaf member biased to bring the contacts together. An actuator projection on the plunger bears against the first leaf member at a location substantially aligned with the contact thereon, and a further actuator on the plunger bears against the free end of the second resilient leaf member. The plunger is biased to urge the normally closed pair of contacts closed and the normally open pair of contacts open by a spring which is sufficiently strong to overcome the biases of the resilient leaf members.

Abstract: There is disclosed a multiple electrical contact switch which has a comb block whose teeth are inserted into receptacles of a mounting block thereby wedging pairs of electrical spring contacts, which are also inserted into the receptacles, between the teeth and the receptacles without bending the spring contacts. The electrical contacts extend from the receptacles and are activated by an operating card, which engages the extended portions of the electrical contacts to open or close electrical conduction paths. When pressure on the spring contacts from the actuating card is released, the spring contacts then move the operating card to an original position wherein the sequence of open and closed contact springs is as if there were no contact with the operating card and the contact springs.

Abstract: In an interlock switch used with an electrical appliance such as a microwave oven. The interlock switch has a housing having an interior front wall, and a plurality of conductive switch elements. A pair of barriers define a pair of gaps with the interior front wall for mounting a buss, comprising a first segment, formed integrally with one of the conductive switch elements, and a second segment, formed integrally with another one of the conductive switch elements.

Abstract: An interlock switch used with an electrical appliance such as a microwave oven. The interlock switch comprises a housing having a plurality of conductive swtich elements operated by an actuator. At least two of the conductive switch elements are biased in opposite directions, thereby reducing the force that would otherwise be needed to operate the actuator.

Abstract: A typewriter baseplate attachment for generating electrical signals that identify operations performed by the typewriter wherein, through the actuation of solenoids located in the baseplate attachment, the keys of the typewriter can be depressed to initiate the functional operations without the characters associated with the keys printing on the paper in the typewriter. This non-printing is effected through solenoid actuation of the correcting mechanism of the typewriter and suppression of the backspacing movement that normally accompanies operation of the correction mechanism.

Abstract: A switch for connecting a selected one of a plurality of multi-terminal connectors to a common connector comprises a pivotable printed circuit board having a planar array of parallel conductors on at least one side of the board extending to the edge of the board, and fixed female connectors having elastically deformable contacts selectably engageable with the planar edge contact arrays by pivoting the printed circuit board to the selected female connector position, the compressive spring force of the elastically deformable contacts upon the planar contacts holding the pivotable printed circuit board in engagement with the selected female connector.

Abstract: An axially spring biased plunger has a cam which upon simultaneous engagement with a pair of switches opens one of the switches while closing the other.

Abstract: A multiple pole switch assembly is disclosed which is a simple structure of a housing having contact means and a metallic conductor comb with a plurality of teeth overlying the contact means. The housing is formed of base means and a cover therefor, which cover slides onto the base means in a first direction substantially parallel to the conductor teeth on the comb. The teeth of the comb extend through apertures in the base means and are clamped in position by the cover, with the cover latched in place on the base. The teeth extending through the base means may then be soldered to the base means, and the back of the comb may be broken off along a weakened area of the comb teeth. Switch actuator means is provided in the form of a thin insulator card having a preselected spacing of apertures in a row. The presence or absence of an aperture in the row establishes switch-open or switch-closed conditions.

Abstract: A piece part, such as a flat metal contact spring (12), is mounted between two plastic details (11 and 25), so that an end portion of the spring 12 projects from the mounting details. One of the details, such as a base member 11, has a cavity 17 within which the spring is placed so that a mounting section (12A) fits within the cavity. The second detail, such as a thermoplastic locking insert 25, includes a finger 25B adapted to fit in the cavity adjacent to the spring section (12A). The insert is provided with pointed energy directors (30 and 31) arranged so that the members can be heated and compressed together, and the directors melt to weld the parts together. The insert and/or the base member is formed with slots (33) so positioned that portions of the molten plastic are forced to flow into the slots during the process so as to encapsulate the mounting section of the spring or other piece part in the plastic.

Abstract: A multiple cantilever spring contact switch has contact members stacked both vertically and side-by-side. The contact members are gripped at one end between surfaces which impose a predetermined inclination of the contact members relative to a base. A pivotally mounted lever on the contact assembly actuates the contact members and can also serve as a member which is actuated by a telephone handset. No specific spring is provided for the lever, the lever being biased by the spring contact members.

Abstract: A switching device comprising a spring pile-up assembly including a plurality of pairs of cantilevered stationary and movable contact springs secured between a pair of support members. A follower card is slidably mounted on the top portions of the support member allowing the follower to move in a plane 90 degrees to the contact springs. The tips of the movable contact springs protrude through openings in the follower card. A cam card including cam portions is slidably mounted to one of the support members perpendicular to the follower. As the cam card is moved the cams engage an edge of the follower causing it to be displaced in its plane of motion sufficiently to open a selected number of contact springs while allowing another selected number of contact springs to close.

Abstract: A multiple cantilever spring contact switch has a plurality of cantilever spring contacts, in one or more series, with the contacts of each series clamped between surfaces which provided a predetermined relative inclination of the contacts. A pivotal member is mounted on the switch assembly for actuation by an operating member, the pivotal member in turn actuating the contacts. The contact between operating member and pivotal member is localized so that misalignment between operating member and the switch assembly does not affect actuation of the contacts. Such misalignment can occur when the switch assembly or operating member or both are mounted on printed circuit boards. The switch is particularly suitable for a hook switch of a telephone.

Abstract: An improved compact electronic switch for controlling an electric motor comprising a housing into which a trigger actuator reciprocates for selecting motor speed and a reversing switch mounted on the housing and interlocked with the trigger actuator for selecting motor direction. Improvements include; an improved switch contact arrangement which reduces arcing on switching from full power to variable power motor control, an improved printed variable resistor for the electronic speed control circuitry, and an improved and simplified reversing switch unit.

Abstract: A switching device comprising a spring pileup assembly including a plurality of pairs of cantilevered stationary and movable contact springs secured between a pair of support members. A follower card is slidably mounted on the top portions of the support member allowing the follower to move in a plane 90 degrees to the contact springs. The tips of the movable contact springs protrude through openings in the follower card. A cam card including cam portions is slidably mounted to one of the support members perpendicular to the follower. As the cam card is moved the cams engage an edge of the follower causing it to be displaced in its plane of motion sufficiently to open a selected number of contact springs while allowing another selected number of contact springs to close.

Abstract: Circuit transfer apparatus is described for use in transferring from time-responsive control to temperature-responsive control, and vice-versa, in a microwave oven. The low cost, miniaturized apparatus is mounted to the wall of the oven's cooking cavity and is operated from within the cavity by insertion or withdrawal of the cable plug of the heat-sensitive food probe. The probe plug cooperates with insulative elements to activate spring-leaf sheet metal contacts mounted in the housing of the apparatus, to thereby effect the circuit transfer. The housing also serves as mechanical retention means for the probe plug.

Abstract: An electrical switch construction having two pairs of cooperable contacts each pair of which is adapted to be opened and closed independently of the other pair, a single manipulator being carried by the construction and being operatively associated with the pairs of contacts to operate either pair independently of the other pair by a cam member carried by the manipulator and having a generally rectangular profile defined by two right angle corners and two rounded corners.

Abstract: A switch is disclosed in which manual adjustment of a contact spring pileup is avoided by closely controlling the interaction between (1) the contact springs, (2) a movable actuator including a plurality of cam surfaces, each of which is associated with an individual contact spring, and (3) a frame for supporting the actuator. This is achieved by molding a cam follower to one end portion and a mounting element to the other end portion of each contact spring. The mounting elements of the contact springs are positioned in engagement with one another and are secured to the frame. The mounting elements serve to orient the contact springs at a particular angle with respect to one another and accurately locate the contact springs and thereby the cam followers with respect to the cam surfaces of the actuator. The cam followers in combination with the associated cam surfaces serve to locate and provide a predetermined bias to the contact springs.

Abstract: A switch has two wire like spring contacts which are cantilever mounted to act as return springs for a pivotable actuator which is urged against the springs when contact is to be made.

Abstract: The present invention relates to a contact spring set comprising contact springs and a lifting card, attached at the outer ends of the contact springs between an upper return spring and a lower return spring. In order to achieve a playless fixing of the lifting card to at least one of the return springs, which allows for a simple fitting of the lifting card, the return spring is flat and provided with two pairs of tabs, which are bent in such a way that adjacent tabs point in opposite directions. The lifting card has a hole for the return spring which is constituted by two portions, substantially equal and displaced relative to a symmetry line through the center of the lifting card, which is perpendicular to the plane of the return spring. The contour of each hole portion has at least one straight side, these straight sides being parallel and having a distance corresponding to the thickness of the return spring and a combined overall length corresponding to the width of the return spring.

Abstract: A switch comprising a pair of leaf springs having contacts and terminals at the both ends thereof, a base member supporting the leaf springs in a cantilever fashion in superposed relationship and a fulcrum member supporting one of the leaf springs so as to make the leaf spring moveable downwardly by pushing the end of the leaf spring.