Abstract: A subfloor trenchduct (10) construction in which the side wall members (14, 16) and lid-supporting means (37) are constructed of galvanized steel in order to provide a reduced cross section for the component members and thereby maximizing the availability of internal space within the trenchduct (10) for electric service. The galvanized steel construction obviates larger cross sections previously employed in utilization of aluminum components which detracted from the effective use of internal space of the duct, and the aluminum components required protective coating since aluminum, when exposed to alkaline concrete, experiences deterioration of the components. The lid-supporting means (37) is made vertically adjustable relative to floor level so that prior to pouring of the concrete (66) the lid (30) is accurately located in relation to the floor.

Abstract: A thermal fuse is comprised of a pair of internested, flat, thin metallic plates, each plate having peripheral upturned flanges along opposite edges of the plate. The flanges of the lower plate each have a notch formed therein and the upper plate has a tab extending transversely from each side through a respective notch. The notches each have a side inclined to the plate to form a ramp, the edge corners of the tabs being cammed up the ramp of the respective notches when the plates are pulled apart in a direction parallel to the plane of the plates, to lift the upper plate perpendicularly away from the lower plate so that the flat confronting surfaces of the plates are drawn apart.

Abstract: The rotary SIP switch (10) provides a single in-line package (SIP) having switching capabilities previously found in dual in-line packages (DIP) while providing more switch contacts in the same package area. The miniature rotary SIP switch (10) has a pair of oppositely disposed terminal and contact leafs (30) fixedly mounted in the base wall (27) of the switch housing (12), with the contact leaf portions (36) cantilevered within the interior of the switch housing (12). Lateral tabs (38) integral with the leaf contacts (36) effect equal spring loading upon a contact pin (44) disposed within an aperture (42) extending through a cylindrically shaped rotary driver (40). The contact pin (44) is free floating in the aperture (42) and self-centers when the rotary driver (40) is rotated and the ends of the contact pin (44) engage respective contact leafs (36). The rotary driver (40) has integral detent protrusions (48) for positioning the driver (40) and contact pin (44) in an open circuit position.

Abstract: A conductive layer (13) adhesively joined to an electrically inert substrate (10) by an organic binder component. The organic binder consists of a resin not substantially less than 15% nor more than about 35% by weight of the composition which further includes dispersed metallic material within the binder and forming the electrically conductive component of the solderable material. A solderable surface layer (15) of the conductive layer (13) includes exposed metallic material suitable for solder bonding terminations (16) to the conductive layer (13), such solderable surface layer (15) being adhesively joined to the binder by means of the organic matrix.

Abstract: A heating system comprising the combination of storage vessels (10, 12) for conventional heating oil and waste oil, respectively, and in which the two storage vessels (10, 12) are effectively sealed apart, one from the other. At the initial stage of heating, conventional heating oil generates temperature of a predetermined amount and the waste oil from vessel (12) is thereafter utilized after having been heated either from a feedback of heat (26, 28) developed by the conventional heating oil from vessel (10) or by a separate electrical resistor element (133), such heating making the waste oil effective as a heating medium. The flows from the two storage vessels (10, 12) containing the waste oil and conventional oil, are pressure controlled (64, 84) so that relief pressure feedback (70, 82) is provided in each distribution network (14, 30).

Abstract: An adjustable rotary switch (10) effects a high degree of switching accuracy between the switching circuit disposed in a printed circuit board (60) and the external switch actuating means attached to the shaft (80) of the rotary switch (10). The switch (10) includes an annular rotor (40) mounted on the shaft (80), the rotor (40) having multi-fingered contactors (50) mounted thereon for engagement with conductive paths (70) disposed in the printed circuit board (60). The shaft (80), rotor (40), and printed circuit board (60) are disposed within a rectangular housing (12) having an aperture (18) providing access to one end of the shaft, and a housing cover (14) having an aperture (15) journalling the other end of the shaft. After assembly of the switch, the housing (12) and shaft (80) may be held in a fixed position while an adjustment tool (30) rotates the rotor (40) to adjust the position of the contactors (50 ) relative to the shaft (80) and the conductive paths (70) of the printed circuit board (60).

Abstract: A miniature DIP switch (10) has actuator levers (82) projecting from a side of the housing (12). A plurality of cantilevered moveable contact arms (72) are supported by a section (34) of the base (30), and a plurality of oppositely disposed cantilevered contact arms (62) are supported by a complementary section (32) of the base. A plurality of insulative rotatable lever actuators (80) are supported each by a respective moveable contact arm (72). Each actuator (80) comprises a lever (82) projecting from a respective opening (18) In the housing (12), an arcuate bearing surface (86) engaging an arcuately shaped boss (22) in the housing, a pair of depending side walls (88) each having arcuately shaped ends (90), and a cam protrusion (87) disposed between the depending side walls (88) and engaging its respective moveable contact arm (72).

Abstract: In a hydraulic press for briquetting loose powders into green components, a load cell senses maximum compacting force. The maximum compacting force is compared with a compacting standard force known to effect a particular weight and density of compacted briquette. There is next operated a closed-loop servo network which adjusts the peak force to the standard force by varying the initial size of the cavity receiving the loose powders. Should the peak force be greater or less than standard force, an actuating mechanism is energized either to enlarge or diminish the die cavity for receiving the powder. If the peak force is too small, the initial die cavity size is enlarged so that a greater amount of powder is charged to the die cavity. The result is that when the final configuration of the briquette is reached, there will be greater density and greater weight to the briquette, causing it to more nearly approximate a standard briquette weight and density.

Abstract: In a press (10) for briquetting loose ceramic powders into cohesive compacted articles, a shuttle (24) and shoe (26) is employed for receiving an inflow of loose powders and adapted for filling the die cavity with powder. Simultaneously the shoe (26) displaces an ejected briquetted article. The characteristics of the longitudinal movement of the shuttle (24), including its range, speed, and phase of movement, are controlled by a power shaft having a crank shaft (50) coupled to the power shaft through an adjustable plate (39). The adjustable plate (39) is angularly adjusted, and the pivot connection (48) between the crank shaft (50) and the center (54) of the adapter plate (39) is radially adjusted. The described adjustments regulate the range, speed, and phase of movement of the shuttle (24). Between the crank shaft (50) and the shuttle (24) is a rocker shaft (60), rocker arms (66, 68) and struts (76).

Abstract: A pallet (10) for receiving a plurality of electrical components used in fabricating crystal resonators (28, 40, 42, 46), has a number of spaced bosses (12) adapted to receive terminals (30, 32) of the components. The terminals (30, 32) extend through a longitudinal groove (20) so that the components can be readily tested at various phases of assembly. The pallet (10) includes a number of spaced teeth (22) whereby the pallet (10), together with the components, can be advanced through a plurality of testing-and-fabricating stations. The pallet (10) is guided in its longitudinal intermittent movement by means of a keyway (26) constructed integrally in a face of the pallet opposite the side having the teeth (22). The pallet (10), together with the components mounted thereon, can be transferred from one fabricating station to the other through a rack (56) which is adapted to receive a number of pallets (10).

Abstract: An apparatus (10) is mounted on a briquetting press (12) and receives briquettes (14) in a magazine (18) which consists of two side rails (22, 24) and a smoothly polished base (28). A sensor (30) determines when the magazine (18) is full and operatively effects, through a programmable controller or microprocessor (not shown), the actuation of a motor (40) to withdraw the base (28) and discharge vertically the row of briquettes (29) from the magazine (18) onto one of a series of pallets (82, 84, 86, 88) transported transversely at a location below the surface of the magazine (18). Pallet position is sensed automatically so that briquettes (29) discharged from the magazine (18) are disposed at a preferred location on the pallet (82, 84, 86, 88). The operations of loading the magazine (18), detecting the magazine (18) as being fully loaded, and discharging the briquettes (29) from the magazine (18) onto a pallet, are coordinated with the movement with the pallets so that loading occurs automatically.

Abstract: An electrodynamic acoustic transducer (54) having two voice coils (50, 52), the coils being addressed by amplified digital signals. The system (12, 60, 54) utilizes a preamplified analog input signal (10) which is supplied to a bifurcated network, one such signal being processed by an inverter (18). The analog signals (42, 44) are compared with triangular waves (38, 40) to effect switched signals (46, 48) that are pulse width modulated signals. The signals (46, 48) are then amplified through impedances (76, 78) and high speed, high current semiconductor switch means (80, 82) so that the amplified digital signals serve as driver means communicated to the separately addressable coilds (50, 52). There is a dynamic balance achieved by separate energization of the coils (50, 52) whereby the diaphragm (97) is positively located in both axial driving directions and is disposed in equilibrium positions by the energization and balancing of the respective coils (50, 52).

Abstract: A linear electric motor comprising a frame of magnetizable material, an armature provided with a permanent magnet having a pair of magnetic poles movably supported in the frame, and a stationary winding circumposing the armature, the winding comprising a pair of coils wound on a pair of axially spaced bobbins secured to the frame. The bobbins supporting the coils are disposed adjacent to the end portions of the frame. Each coil circumposes a pole piece secured to an end portion of the armature and each of the coils is disposed between one of the magnetic poles and the frame. Energization of the coils of the stationary winding exerts a force on the coils with respect to the armature resulting in linear motion of the armature.

Abstract: A slider consisting of a one or two piece body with resilient contact switch members projecting in opposite directions at spaced intervals along the length of the slider to be in contact with a collector plate on one side and a respective one of spaced contactors at the opposite side. A plurality of ribs or protuberances which are located in the line of movement of the switch members, causes resilient deformation of the switch members to hold the switch in position once it snap fits into one or another of its respective switch positions. The protuberances may be either projections formed integrally in a switch body or on the collector plates.

Abstract: A miniature insert molded slide (10) or rocker (12) switch assembly is designed for machine insertion on printed circuit boards. A metallic strip (90) is blanked to form pairs of oppositely disposed terminals (22) still attached to the carrier strip (92). The insert-molding operation forms a box-like housing (14) about the terminals (22) on the strip (90), each pair of terminals (22) being embedded in the base (16) of said housing (14). During the insert-molding operation, the die forms the terminal head (28) of each terminal (22). The housing-terminals construction is utilized for both the slide (10) and rocker (12) switch assemblies. The slide switch assembly (10) includes an actuator (40) having a double cantilevered resilient contactor (50) entrapped in a through opening (48) in the actuator (40), the contactor (50) having a depending arcuately shaped contactor head (54) for engaging and disengaging the terminal heads (28).

Abstract: This invention relates to an auxiliary load-carrying apparatus for use with such load-carrying vehicles as self-transit concrete mixer trucks.The apparatus consists of two power-actuated devices having ground-engageable wheels which are selectively movable between raised-transport position and lowered ground-engaging position in which a portion of the load of the vehicle is transferred onto the ground engaging wheels of the auxiliary load-carrying apparatus. A load-carryng device is located one at each side of the vehicle and is articulated so that the wheels of the load-carrying device can move relatively freely in any one of three dimensions of movement so as to conform to the surface of the highway, or ground, by which vertical support is provided the vehicle.

Abstract: A circuit module (10) having a row of connector pins (21) and being approximately 4mm. thick or less, and including an electrical circuit (22) connected to the connector pins (21). In prior art designs, it has not been possible to utilize a large substrate having good heat dissipation properties and, at the same time, include an attached electrical device, without exceeding the allowed maximum dimensions of the module. The present invention solves the problem by recessing an edge (17) of the substrate (11), depositing spaced-apart conductor films (26a and 26b) in the recess (16) that electrically connect with the eletrical circuit (22), and soldering (31a and 31b) the electrical device (30) to the conductor films (26a and 26b). Principal uses for the invention include digital computers and similar complex electronic devices.

Abstract: Apparatus and process for hot-stamping molded plastic containers in which the container is moved past a heated die having a platen with a printing die, the die being floatably movable so that linear uniform pressure is exerted between a confronting container surface and die surface. As the container moves across the die surface, it is rotated so that foil which is pinched between the container and die is transferred onto the surface of the rotatable container. The uniform linear pressure between container and die, transfers foil to the accompaniment of rotation of the container so that defect-free lamination of foil is transferred onto the container surface to form decorative or alpha numeric information. The operation is continuous, with successively spaced containers moving into printing position relatively to the die, where the hot-stamping operation is repeated. Containers are automatically removed after printing, and successive containers supplied either manually or automatically.

Abstract: An apparatus and process for producing fired resistors having uniform resistance characteristics, wherein a continuous closed-loop feedback network detects deviations from standard resistivity values and continuously corrects the composition by varying the proportions of high and low resistance material ratios or blends of such materials being screened onto the substrates (212), and detects deviations in screened-on film thickness for continuously correcting either the speed of operation of a screener assembly (No. 1, No. 2) or the squeegee head pressure in order to obtain a predetermined film thickness. The process continuously adjusts the fired resistance values through on-the-production-line control of mixture ratios of high and low resistive paints, to produce final fired resistors (170) having the required resistance values, temperature coefficients of resistivity, improved stability, and improved TCR tracking values.

Abstract: A variable resistance control includes a metallic structure plate that functions as a heat sink and that provides both a collector and terminals, a body that is molded onto the structure plate, a resistance element that is deposited onto the body and onto portions of the terminals, a contactor, and a driver. In one embodiment, additional miniaturization is made possible by bending a tab portion of the structure plate between two of the terminals to form a stop lug for limiting rotational movement of the driver.