Abstract: A protective device (3) for a hermetic type electromotively driven compressor (1a) includes a protector assembly (30) having a housing (32) with an electric current fuse (34) which detects a predetermined over-current. The housing (32) comprises an electrically insulating skirt member (31) formed so as to block a conductive part on the side facing an external connection terminal. By forming the electrically insulating skirt member (31) of housing (32) for a hermetic type electromotively driven compressor, insulation distance between a conductive part such as the electric current fuse (34) and an external conductive part such as a metal wall part (21) is set to be 9.5 mm or more.

Abstract: A socket (10) has a cover (14) pivotably mounted to a base (12). The base is formed with a seat (12a) for mounting a semiconductor device on a contact mounting plate (18). A locking mechanism (20) for locking the cover in the closed position includes an over center linkage mechanism interacting with a locking pin (20a). In a modified embodiment, the locking mechanism is provided with a pivotable locking member (27) to provide either manual or automated operation. The cover (14) of socket (10) also comprises an integrally formed heat sink. In another embodiment (10′), a separate heat sink (30) is independently mounted on the cover (28) provided with an aperture through the cover in which the heat sink is slidably mounted.

Abstract: A recognition switch assembly (10) has a movable contact assembly (24) mounted on an actuator (22) mounted for sliding movement along a longitudinal direction (12a) in a housing (20) with a stationary contact board (26) mounted on the housing over the movable contact assembly (24). The actuator is formed with a laterally deflectable beam (22q) on one side of the actuator having a protrusion (22s) which cooperates with space protrusions (22p) on the opposed side for sliding engagement with opposed sidewalls (20f, 20g) of the housing. A pair of vertically deflectable beams (22k) having a protrusion (22n) slidingly engage platform surfaces (20b, 20c). When mounted in the housing, the beams are deformed to eliminate clearances between the actuator (22) and the housing (20) in both the vertical and lateral directions resulting in an improved, vibration independent, electrical output signal of the switch assembly.

Abstract: A battery protection device (10) has a hollow casing body (11) formed by ultrasonic welding of a first casing member (12) and a second casing member (13) with respect to casing body (11), a first external terminal extends from a first end surface (11b) and a second external terminal extends from a second end surface (11c). The battery protection device (10) further has a first contact (18) connected to the first external terminal, a second contact (16) connected to the second external terminal, and a bimetallic member (17) which enables the connection between and first and second contacts to be opened and closed. In a second embodiment one of the casing member (72) is formed of a sheet of electrically insulative material which is received over and closes the opening in the other casing member (71).

Abstract: A start-up switch 50 for an electric motor 1 comprises a resistive element (54) which is so constituted as to be connectable to an electric current path (15) and which has such a characteristic that its resistance value increases by the heat generated by electric current that flows through the electric current path (15) and a thermostatic switch (60) which is connected in series with the resistive element (54). The thermostatic switch (60) has an actuation member (60) which is responsive to temperature so that upon reaching a preselected temperature, said member moves from a closed current path position to an open current path position. The thermostatic switch (60) is positioned to be in direct heat transfer relationship with the resistive element (54) so that the member will (66) rise in temperature as the resistive element (54) rises in temperature.

Abstract: A fluid pressure sensor (10) has a generally polyhedron configured capacitive transducer (18) electrically connected to a flexible circuit using interference fit U-shaped edge connectors (20). The flexible circuit (16) is received in an electronics chamber formed in a top end of a base member (12) with the corners of the transducer disposed on the face surface (12f) of the top. A cover (24) is formed with a circular fluid pressure opening (24a) through which a sealing gasket (22) extends, the gasket having tabs (22a) received in a seat (24c) formed in the bottom surface of the top wall (24b) of the cover. A transducer receiving seat (24d) is also formed in the bottom surface of the cover for placement of transducer (18).

Abstract: A creep acting thermostatic switch (30) has an oblong, electrically conductive cup-shaped housing (32) formed with a side wall (32b) extending upwardly from a bottom wall (32a). A generally J-shaped creep acting thermostatic member (38) has a short leg (38a) attached to the side wall, a long leg (38b) extending across the cavity formed in the housing and a bight portion between the legs having a flattened surface portion (38c) to prevent interference with the corner between the side wall and bottom wall. A movable electrical contact (40) is mounted on the free end of the long leg and is movable into and out of engagement with a stationary electrical contact (37) mounted on a lid (36) received on the side wall. This arrangement allows for a thermostatic member having an optimized length to width ratio to provide maximum disc forces for a given housing size.

Abstract: An electric circuit breaker (10) has a toggle mechanism (18) having two movable over center joints (3, 4) connected between a push-button (16) and a movable contact mechanism (30). When the push-button is depressed a first link rotates bringing the first movable over center joint (3) across a center position represented by a first imaginary straight line (1) to a stop surface (28). A spring member (36) provides a bias which acts on the second movable over center joint (4) normally maintaining the second movable joint against the stop surface so that with the two movable over center joints biased against the stop surface the movable contact mechanism is moved to a closed contact position when the push-button is depressed.

Abstract: A port fitting (12, 42) is formed with a closed, pedestal end forming a diaphragm (12a, 42b) on which a strain gauge sensor (22) is mounted. A support member (16, 44) is received on the pedestal end and is formed with a flat end wall (16a, 44a) having an aperture (16c, 44c) aligned with the sensor. A portion of a flexible circuit assembly (24a, 58a) is bonded to the flat end wall. An electronics chamber is formed in a connector (18, 46) which is inverted and maintained at a selected height adjacent to the flat end wall of the support member to facilitate soldering of the flexible circuit to terminals (20, 48) in the connector and electronic components to the flexible circuit. The port fitting, when assembled to the support member, is also maintained at the selected height adjacent to the inverted connector to facilitate wire bonding the sensor to the bonded portion of the flexible circuit.

Abstract: A control used in a two stage HVAC system has a power supply from a 24 VAC transformer which is full wave rectified (D1, D2, D3, D4) to create DC voltages for a microcontroller (U1) and relays (K1-K3). All of the control information needed for the two stage control system is sent to the control from a room thermostat (12) having first and second stage cooling signal terminals (Y1, Y2) over a single line by connecting a diode between the Y1, Y2 terminals creating separate microprocessor recognizable signals.

Abstract: A socket (1) has a base (10) which forms a recess (10d) for receiving a support member (12). The support member (12) has a recessed surface (12a) for carrying a contact film (14) and has bores for mounting spring contact elements (15). The spring contact elements engage contact members (14b) of contact film (14) from below the film. An adapter (13) has a seat (13b) for a BGA package (2) for exposing solder balls (2a) to contact members (14b) from a location above the film. Socket terminal pins (11b) are electrically connected to spring contact elements (15) through circuit paths (13c) on a pitch expansion substrate (11). A cover (20) and a compression member (30) apply a force to the package.

Abstract: In a sealed casing (2) there are provided a bimetal disc (8) which carries out the switching of an electric current path by snapping between oppositely dished configurations in conformity with the level of the electric current that flows therethrough and ambient temperature by moving a movable contact (10) into and out of the electric current path. A fuse terminal (14, 15, 141, 142, 143, 144) is connected in series with the bimetal disc (8) and shuts off the current path by being melted by an over-current. The fuse terminal (14) in one embodiment is fixed on one surface of a support member (3) that serves as a heater. The fuse terminal (14) and the bimetal disc (8) are connected through a connective pin (12) which is provided through the support member (3) electrically insulated therefrom. In another embodiment the bimetal disc (8) and the fuse terminal (15) are disposed on opposite face surfaces of support member (3).

Abstract: An in-range fault detection system for a full wheatstone bridge element (12) having piezoresistive elements (R1, R2, R3, R4) has bridge outputs (INP, INM) connected to measuring means in the form of a first circuit portion (13) to provide a common mode voltage (VCM). A second circuit portion (14) is used to provide a centering voltage (C*VBRG) equal to the common mode voltage at the time of sensor calibration and a third circuit portion (15) is used to provide a small window voltage (W*VBRG) which is a fraction of bridge voltage. The value (W*VBRG) is subtracted from (C*VBRG) at a first summing circuit (SUM1) and added to (C*VBRG) at a second summing circuit (SUM2) and the results are each compared to the common mode voltage by comparators (Q1, Q2) which are then determined to be within or without a window of valid values by an OR gate (Q3).

Abstract: A socket (2) for removably mounting a BGA package. A plurality of contacts (7) are mounted in a base (4), the contacts each having a pair of arms (7a and 7b) for effecting compressive electrical contact of the solder balls of the BGA package being held. A slider (5) is slidably mounted on the base (4) for opening and closing of the arms. An external force is applied in a prescribed direction at a cam follower portion (52) of the slider by a cam member (20) provided on a diagonal line of a generally square base (4). The cam engages the cam follower portion (52) of the slider at a selected angle of inclination and is movable in a direction which crosses, at a right angle, the moving direction of the slider.

Abstract: An electronic part mounting device including a main socket body (2) having a plurality of contact parts (7) mounted therein for making contact with a plurality of contact terminals (10a) on an electronic part (10). Main socket body (2) is adapted to work with a contact opening and closing tool (3) with a holding part (34) for removably mounting and dismounting an electronic part (10) in the socket body (2) and an actuator member (30) having touch parts (32) that engages and moves a tool positioning part (52) on the socket body (2) to cause opening and closing of contacts (7).

Abstract: Changes in the concentration of a chemical, such as a gas, are determined using a non-linear chemical sensor which is subject to shifts in calibration over time. In order to minimize errors caused by such shifts in calibration a first infrared signal (Ig(1)) is measured and using an absorption value under an assumed chemical concentration (C(1)), a zero chemical signal Io(1) is calculated using the known physical law and mathematical relation Absorption=1−Ig/Io. A second infrared signal (Ig(2)) is then measured and the absorption value is calculated using the previously calculated zero chemical signal. A second concentration (C(2)) is then determined and the change in concentration is calculated by subtracting C(2) from C(1).

Abstract: A circuit breaker (10) is shown having a movable electrical contact (36) adapted to move into and out of engagement with a stationary electrical contact (38, 40). A current carrying thermostatic trip member (42) has a portion movable in response to changes in temperature with a motion transfer member (46) transferring the motion to latch/catch mechanism (20, 24, 30, 32). The catch portion (30, 32) comprises a generally U-shaped adjustment element (30) formed of thermostatic material whose legs are fixed to the base (32a) of a catch member (32) which in turn is pivotably mounted in the casing of the circuit breaker. The bight (30c) of the adjustment element is free to move in response to temperature changes relative to the catch member. Overcurrent will cause the thermostatic trip member to transfer motion to the bight of the adjustment element causing the adjustment element and catch member to pivot and release a latch to thereby open the circuit breaker.

Abstract: A socket having a base (2) which can removably mount a BGA package (9) and a plurality of contact members (6) which are arranged in conformity with the pattern of terminal solder balls (11) of BGA package (9) on base (2) and which have a pair of arms (6a) and (6b) that are capable of opening or closing for pressure contact in the state of sandwiching each terminal of BGA package (9). Partition walls (4a) are provided on slider (4) which is capable of moving in a direction normal to the opening and closing direction of arms (6a) and (6b), the partition walls engage with the pairs of arms of the contact maker (6) respectively, with the arms (6a) and (6b) being opened or closed by the movement of the partition wall.

Abstract: A method for testing a cell in a device for reliability is disclosed. The cell us coupled to a reference voltage and a current source. The method and system comprises measuring a mirrored current through the device at first predetermined gate voltage and measuring a mirrored current through the device at a second predetermined voltage. The method and system includes determining the threshold voltage of the cell and heating the device for a predetermined period of time. Finally, the method and system includes calculating a new threshold voltage if the measured mirrored current is different from the previously measured current. Accordingly, a system and method in accordance with the present invention addresses this drift problem by testing the characteristics of the memory array on a bit by bit basis. A system and method in accordance with the present invention includes a mirrored current source arrangement.

Abstract: A socket (10) includes an adaptor (28) which has a seating surface (28b) for an IC (100) and which has a plurality of contact member receiving holes (28d) in the seating surface. The tips (14c) of a plurality of contact members (14) are received through the contact member receiving holes (28d) of the adaptor, with contact established with each respective terminal (101) of the IC (100) that has been placed on the seating surface. The IC on the seating surface is held by means of rotary latches (22). The latches (22) have an opened position for placement of the IC on the seating surface of the adaptor and a closed position for holding the IC from above it, rotating about a shaft (32) fixed to the base. A cover (20) is movable between first and second positions and a links (24) connected to the cover (24) open the latches when the cover is at a first position and close the latches when the cover is at a second position.