Abstract: In an electromagnetic relay, an electromagnet is constructed from an approximately U-shaped magnetic pole piece, an approximately U-shaped magnetic yoke, and an armature. One side leg of the magnetic pole piece, one side leg of the magnetic yoke, and the armature are accomodated in the central hole of a bobbin so that the efficiency of the conversion of electrical power into a driving force is increased.

Abstract: A low cost electromagnet assembly for a relay. The assembly includes an I-shaped stationary magnet that extends through a passage in a magnet coil and a U-shaped armature assembly with the armature assembly. The armature assembly includes a molded armature guide having projections on a rear wall of the guide arranged to actuate a plurality of switch plungers, side walls extending from the rear wall defining a cavity and an opening in the rear wall exposing a portion of the cavity at the rear wall side of the guide. The assembly also includes the U-shaped armature having a body portion positioned in the cavity and an elastomeric pad position between the armature body portion and the rear wall and a conical spring between the body and guide for absorbing shock created when the electromagnet is deenergized.

Abstract: A shock-resistant low profile crystal package and internal crystal mounting apparatus capable of adequately protecting a multi-electrode crystal plate from high-G forces occasionally experienced by the mishandling of the particular article in which the component has been mounted. The crystal plate is positioned within an aperture of the base member and is supported about its edge during wire-bonding of the electrode pattern to the terminal connecting pins of the base member. Since the crystal plate is free-floating about its central position, the crystal can undergo thin film metallization of an electrode pattern from either side of the crystal plate to achieve desired frequency parameters. A ceramic retaining ring is placed on top of the crystal plate and the overall package is hermetically sealed by the welding of a cover to each end thereof.

Abstract: A motor mounting for mounting a D.C. motor in an automobile body structure comprises a casing for the motor. The casing is constituted by a pair of casing halves and one of the casing halves is an integral part of the automobile body structure.

Abstract: A permanent magnet dynamo electric machine is provided with a shield of high saturation flux density at the weaker or lower flux tip or edge of a permanent magnet pole face to prevent both circumferential and axial demagnetization of that portion of the pole face. The shield resides in a recess in the pole face so as to maintain a constant width air gap between the rotor and stator and has a thickness in the range of 5-15% of the overall thickness of the shield and pole combined. The shield and its pole face extend axially at least over the entire axial dimension of the area swept by the rotor.

Abstract: An surface acoustic wave device, especially amplifier which includes input and output means for electrical signals provided so as to be spaced on a surface of a piezoelectric material which comprises a laminate in combination with a semiconductor, and an electrode provided in a surface signal wave propagation path between said input and output means for supplying pumping power.

Abstract: A contact structure (40, 44; 62, 63) is arranged to provide oppositely directed parallel current paths within a closed loop magnetic flux amplifier (46) to be directly separable under high overload current conditions, the flux amplifier (46) functioning to arrest the movable contact (62, 63) momentum. Manufacturing economies are realized by subassembling the stationary contact structure (40, 42, 44) and flux amplifier (46) and subsequently trapping one end (42a) of that assembly within the base (4a) and securing the other end with a single screw (68). The movable contact arm (62) comprises a plurality of blanked laminations assembled to provide improved contact (63) mounting and bearing (62d) surfaces. The molded case sidewalls are strengthened in the contact separation area by offsetting the parting line (PL) between cover (6) and base (4) closer to the bottom of base (4) and overlapping the thinner base sidewalls with thicker cover sidewalls at the offset (4e, 6e).

Abstract: The magnetic circuit (6) of the stator is suspended from resilient suspension bars (26) which are welded both to floating stiffening rings (30) that are firmly mounted on the magnetic circuit, and to some of the stiffening rings (20) of the outer sheath (18). Other casing stiffening rings (22) have openings to allow the suspension bars to pass freely therethrough, and are equipped with stops to limit rotation of the stator in the event of an electrical fault. There are thus two paths for transmitting force between the magnetic circuit and its surrounding sheath, one of which can be optimized for damping the vibrations of normal use, while the other can be optimized for avoiding damage under fault conditions.

Abstract: A driving motor of the type employing pneumatic bearings is improved by reducing a weight moment of an upper pad by cutting away a portion thereof, to make the gaps of the bearing pads of the motor more nearly uniform.

Abstract: A piezoelectric vibrating device comprises a vibrating element supported by a support frame through at least two arms with the support frame surrounding the vibrating element. The vibrating element, the support frame and the support arms are of one-piece construction fabricated from a sheet of temperature-stable metal of constant elasticity. A ZnO layer is formed so as to overlay the vibrating element and also a portion of the support frame, and electrodes are formed so as to overlay a part of the ZnO layer on the vibrating element and another part of the ZnO layer on the support frame, respectively. One of the electrodes on the other part of the ZnO layer cooperates with the metal of constant elasticity to define a static capacitance with the ZnO layer serving as a dielectric body. An aluminum layer is interposed between the ZnO layer and the vibrating element.

Abstract: An ultrasonic wave generator comprising a semiconductor superlattice with a periodic variation in its space charge and a far infrared laser for applying a transient electric field to the superlattice transverse to the direction of its periodic variation. The ultrasonic wave produced has a wavelength of the period of the superlattice which can result in 100 gigahertz ultrasonic waves. Structure is included for guiding these waves into an acoustic system.

Abstract: In a quartz crystal microresonator of the type including first and second stem portions, a pair of integral tines extending between the stem portions, a slot between the tines, the slot having opposed crotches where the tines join the stem portions, and a plurality of electrodes mounted on each of the tines, spaced along the lengths thereof, the electrodes being adapted for receipt of an AC voltage for causing the tines to oscillate, there are disclosed several different electrode configurations to optimize resonator performance when operating in the fundamental and first and second overtone flexure modes. The electrodes change polarity along the length of the tines at points where the second derivative of displacement changes polarity.

Abstract: A stator wedge assembly provides a spring force to assist in retaining a conductor securely in a slot, without requiring a separate spring. Two ends of the assembly are received in a dove-tail at the mouth of a slot. A central spring section extends between the two ends and is slightly narrower than the walls at the mouth of the slot, so that it is free to flex. The central part of the central spring section has an increased thickness extending towards the conductor in the slot. At least one wedge is inserted, to press against the conductor in the slot on one side and to press against at least one of the two ends and the central part of the central spring section on the other side, forcing the central spring section away from the conductor. Because of the flexibility or springiness of the material of the flexed central spring section, a spring force is applied to assist in restraining the conductor in the slot.

Abstract: A permanent field type starting motor is provided with a permanent magnet, and a non-permanent magnet auxiliary pole which has higher reversible permeability than that of the permanent magnet. The auxiliary pole is disposed in the circumferential direction of the inner circumference of a yoke and on the magnetizing side of armature reaction relative to the center of the pole. The pole arc ratio of the auxiliary pole with respect to the center angle of the field is selected in a range from 0.07 to 0.4.

Abstract: An inside-out hysteresis synchronous motor for use with inertial sensors and having a hysteresis ring magnetically isolated from the motor structure while maintaining the thermal expansion loop of the motor structure.

Abstract: An AC generator for internal combustion engines comprises a stator including an armature core, a generator coil and an output terminal connected to an end of the coil; a rotor fitted on the forward end of a crankshaft and including a hub secured by a mounting screw axially at the end of the crankshaft, claw tooth magnetic poles pressure-fitted on the boss, and a field coil arranged in the space formed by the claw tooth magnetic poles and the hub; a collector device including a first collector conductor, arranged substantially at a central part of the rotor electrically connected to an end of the field coil and an annular second collector conductor, arranged along a circumference of the rotor, electrically connected to the other end of the field coil; and a first brush in sliding contact with the first collector conductor and a second brush in sliding contact with the second collector conductor.

Abstract: The present invention relates to a disconnectable connection between a trip unit and circuit breaker. The disconnectable connections between the removable trip unit and the circuit breaker unit include inclined connection lugs so as to provide access to the set-screws of the connections on the narrow side face of the circuit breaker casing.

Abstract: In an electric switch having a bridging contact movable into and out of engagement with a pair of fixed contacts, at least one of the terminal elements supporting the fixed contacts comprises a strip of sheet metal folded back upon itself to provide a loop shaped current path with first and second conductive sections extending generally parallel to the bridging contact on opposite sides thereof in close proximity thereto. Attractive forces electrodynamically developed between the bridging contact and the first conductive section of the one terminal element are additive to repulsive forces electrodynamically developed between the bridging contact and the second conductive section of the one terminal element for increasing contact pressure between the bridging contact and the fixed contacts under excessive current conditions.

Abstract: Multielement ultrasonic probe production process connecting a piezoelectric ceramic block incorporating an upper conductive layer and a lower layer to two printed circuits having a metallized face and a face provided with conductive strips, electrically connecting one of the conductive strips to one of the faces of the printed circuits and the other conductive strip to the other face of said circuits, cutting out said block and the upper part of said circuits so as to form equidistant piezoelectric elements and mechanically insulating them from one another, as well as the connections with respect to each element.The invention has application to medical echography.

Abstract: The present invention relates to a multi-pole circuit breaker with an interchangeable magneto-thermal tripping unit electrically and mechanically connected to the breaker unit by means of connecting screws. The connecting lugs of the breaker unit are positioned with vertical play in transverse slots in the breaker unit casing and are electrically connected to the movable contacts by flexible connections. When the connecting screws are tightened the breaker unit connecting lugs are shifted to bear on the associated tripping unit lugs irrespective of any positioning defects. A reset spring of the electro-magnetic tripping device is anchored on one end on the armature and on the other end to the tripping device adjusting bar.