Abstract: This invention relates to thick film base metal resistive paints for firing on a substrate to form a resistor having a temperature coefficient of resistance within .+-.100 ppm/.degree.C., while providing a means to selectively blend the resistive paint to provide a wide range of decade resistivities from less than 10 ohms/square to more than 1K ohms/square. The sheet resistance and TCR are controlled by mixing a glass frit from at least one of a first and second glass material; with TiSi.sub.2 ; and at least one of Ti.sub.5 Si.sub.3 and AL.sub.2 O.sub.3 ; and a screening agent, for subsequent screening onto a substrate and firing in an inert atmosphere at a peak temperature of about 900.degree. C. The first glass material comprises, by weight, 5 to 10% SiO.sub.2 ; 30 to 50% BaO; 40 to 60% B.sub.2 O.sub.3 and 1 to 5% CuO. The second glass material comprises, by weight, 50 to 70% B.sub.2 O.sub.3 ; 25 to 45% SrO; and 2 to 10% SiO.sub.2.

Abstract: A copper conductive paint for use on a porcelanized metal substrate, which comprises a powder mixture of 82 to 98.5% copper, 0.5 to 12% copper hydroxide, and 1 to 6% non-reducable borosilicate glass frit. 75 to 90 percent of the powder mixture is blended with 10 to 25 percent screening agent to form the copper conductive paint herein disclosed. The copper conductive paint is then screened and fired upon a porcelainized metal substrate in an inert atmosphere at approximately 900.degree. C. to form a copper conductor exhibiting improved adhesion characteristics.

Abstract: A dual speed, full duplex modem for transmitting and receiving data on a dialed-access telephone line includes a signal processor for storing samples corresponding to a sinusoidal waveform, for selecting samples at intervals determined by the mode in which the modem is operating to synthesize a signal for modulating by data for transmission, and for autocorrelating a received signal at a frequency determined by the mode in which the modem is operating to recover data from the received signal. The signal processor includes configuring input ports, and a microcomputer receives instructions related to the mode in which the modem is to operate to output a mode-configuring word to the configuring inputs. Conversion from the signal processor's digital output to the analog signal to the line and from the line's analog signal to the signal processor's digital input take place through two time-division multiplexed coder-decoders. The stored sinusoid is mu-law compressed.

Abstract: An integral switch connector with remote actuator has a plurality of conductive terminals disposed within a switch housing. A slide member is remotely biased to make or break contact between contact arms to switch voltage between terminals. A connector disposed within switch housing provides connection to a remote apparatus. The remote actuator has a snap-action feature, to bias the slide member independently of the speed of movement of the manual biasing means. Movement of the actuator assembly biases a non-conductive actuator rod disposed within a non-conductive sleeve, to bias the slide member within the switch housing to make or break electrical communication between terminals. A spring disposed between the slide member and the switch housing breaks electrical contact between terminals should the actuator rod fail. A link coupling provides a removable connection between rod and sleeve at a location between actuator and switch assemblies.

Abstract: An electrical connector receptacle assembly for mounting to a support member which slidably receives a phone type jack and a portion of a printed circuit board to provide electrical communication therebetween. The connector receptacle assembly has an insert member with a plurality of slots therein. Formed contacts are positioned in the slots in the insert member to contact conductor paths on the printed circuit board and contacts in the phone type jack. Opposing contacts provide for contact with conductor paths on opposing sides of the printed circuit board. Opposing contacts may be adapted to provide electrical contact upon removal of the portion of the printed circuit board from the connector receptacle, to provide a switching function therebetween.

Abstract: A potentiometric linear position sensor including a housing (10) made of extruded aluminum which may be cut to preferred lengths (15). The sensor includes a Kapton film substrate (32) having first a uniform coating of resistive material (34) disposed thereon, and then distinct islands formed by laser sculpting. Conductive material (50, 53, 55, 56, 57, 58), screen printed upon the resistive material before or after the laser sculpting, is connected to terminals (62, 68, 70) for the respective electrical elements (48, 51, 55). The flexible Kapton film substrate (32) is inserted endwise into the housing (10) with the side edges of the substrate curled upwardly and captured within longitudinal housing slots (28, 29) disposed along opposite housing walls (14, 16).

Abstract: Disclosed is a method for making glass bonded metal oxide electric resistors involving including in the mixture a refractory oxide for providing configuration stability during firing.

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 actuator 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 flexible porcelain tape (10) is manufactured for application to a metal substrate (50) to produce a porcelainized metal substrate (60, 90, 92). The porcelain tape (10) provides an insulative layer (102) upon which can be applied electrical circuits (110) comprising conductive paths (112) and resistors (116), either before or after the porcelain tape (10) is fired. The porcelain tape comprises glass frit (12) blended with a vehicle (11), with volatile gases removed to effect a predetermined viscosity. The mixture (14) is applied evenly to a flexible plastic carrier (16) and dried. The tape (10) may be rolled up and stored until needed, whereupon the flexible carrier (16) is peeled away either before or after the porcelain mixture layer (18) is cut to desired size and configuration. Single or multiple layers of the mixture layer (18) can be disposed upon a metal substrate (50), the combination laminated, and then fired.

Abstract: An apparatus (10) and method for the automatic insertion of terminals (84) into cavities (16) of a ceramic substrate (15). A continuous carrier web (80) is advanced from a reel (90), into an automatic terminal insertion apparatus (10) simultaneously with the automatic advancement of substrates (15) along a trackway (20). As a substrate (15) is secured by a securement and lateral transmission apparatus (170) and moved laterally from the trackway (20) to align the substrate cavities (16) with associated transmittal barrels (162), a web hold down apparatus (130) secures web portion (82) of carrier web (80) and the cut-off blade (146) of a separation block (144) moves downwardly to separate a predetermined number of terminals (84) from the web portion (82) and locate the terminals in transmittal slots (152) located in a subjacent pressure pad (150).

Abstract: A machine insertable miniature DIP switch (10) comprises a housing (12) insert molded about a plurality of terminals (40). The terminals (40) are oppositely disposed pairs having interior portions (44) located within housing chambers (30) formed by transversely extending walls (20), with the ends of the pairs of terminals separated by an open area (A) comprising a depression. An actuator (60) includes an upward extension (64) above a top plate (62) with a contactor receptacle (66) located therebelow, a depending detent wall (68) with a detent protrusion (70) on one side of the actuator, and an oppositely disposed depending actuator side wall (72). The detent protrusion (70) is received by detent openings (22) within the associated transverse wall (20), top plate extensions (63) are positioned over the associated transverse wall, and the oppositely disposed actuator side wall (72) is positioned for engagement with a shelf (24) located in the associated transverse wall.

Abstract: A rotational speed sensor (10) comprising a shaft (54) having a reluctor (50) mounted thereon and coacting with a complementary shaped stator (18). The reluctor (50) and stator (18) have coacting regularly spaced projections (20, 58) which are magnetizable so that as the reluctor (50) rotates with the shaft (54), there is developed a cumulative voltage output which in turn enables utilization of much greater air gaps between the respective projections (20, 58). Because of the greater latitude in the air gaps, it is possible to construct a variable reluctance speed sensor (10) much more economically and with less emphasis on cumulative manufacturing tolerances. This greater flexibility of manufacturing with higher manufacturing tolerances contributes materially to the attainment of an economical and reliable speed sensor.

Abstract: The present invention comprises an electromagnetically operated hydraulic valve device (10) providing an almost instantaneously responsive displacement of a ball valve (60) in order to effect fluid flow relative thereto. Hydraulic valve device (10) comprises a generally cylindrical housing (12) having one end (16) open and a bushing (19) extending from the other end (18), with a plurality of longitudinal openings (14) disposed about the perimeter of housing (12). A cylindrical bobbin (30) having an interior through opening (32) is disposed within housing (12) and supports an electrical winding (34), with a core member (20) enclosing the open end (16) of the housing and having a circular post (22) extending into the bobbin opening (32). A nonmagnetizable sleeve (38) is located within the interior of bushing (19) between the bushing and a cylindrically shaped armature (36).

Abstract: A leak tight position sensor or transducer (10) comprising a housing (12) having a cavity (32) with an opening (14) in one side and an aperture (16, 26) in each end of the housing (12). Located within the cavity (32) is a drive block (34) having bushing (36) with a threaded aperture (37) receiving the threaded end (42) of a shaft (40) made of a permanent magnet material. The threaded end (42) of the magnetic shaft (40) has a flat (44) and the other end (46) of the shaft is journalled in an aperture (16) of the housing (12). A metallic contactor (38) attached to the drive block (34) wipably engages an electrical circuit (54) printed on the interior surface (52) of a ceramic substrate (50) proportioned to seal the housing opening (14). Electrical wires (60) inserted through openings (58) in the substrate (50) are soldered to the circuit (54) and not only complete electrical connection and securement of the wires (60) to the circuit (54), but seal the openings (58) in the ceramic substrate (50).

Abstract: A potentiometric linear position sensor including a housing (10) made of extruded aluminum which may be cut to preferred lengths (15). The sensor includes a Kapton film substrate (32) having first a uniform coating of resistive material (34) disposed thereon, and then distinct islands formed by laser sculpting. Conductive material (50, 53, 55, 56, 57, 58), screen printed upon the resistive material before or after the laser sculpting, is connected to terminal means (62, 68, 70) for the respective electrical elements (48, 51, 55). The flexible Kapton film substrate (32) is inserted endwise into the housing (10) with the side edges of the substrate curled upwardly and captured within longitudinal housing slots (28, 29) disposed along opposite housing walls (14, 16).

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 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: An improved push-push switch (10) suitable for complete automatic assembly is disclosed. The push-push switch (10) contains essentially two moving parts comprising an actuator (50) and a cam (60), the cam (60) coupled by keyway connections (63) for rotation with the actuator (50). Switch contacts (43, 47, 49) are located adjacent the moving switch parts in order to effect a make and break type of switch operation. The actuator (50) has interior (56) and exterior (54) gear teeth which mesh with cover gear teeth (36) and housing gear teeth (14), respectively, to effect rotation of the actuator (50) and the cam (60). The configuration of the cover gear teeth (36) and the associated interior actuator gear teeth (56) provide an axial over-travel of the actuator (50) without effecting any appreciable rotational movement of the actuator (50), thereby compensating for accumulated manufacturing tolerances without affecting switching functions relative to axial displacement of the actuator (50).

Abstract: A variable resistor element (10) comprises two thick film resistance layers or tracks (12, 14; 40, 50) electrically insulated one from another and on an insulating substrate (11). The thick film resistance layers (40, 50) may consist of the same resistance composition and thereby have the same resistivity, but the paths (40, 50) having different widths to effect different resistances; or, the widths of the resistance layers (12, 14) may be the same but the layers (12, 14) comprise different resistance compositions having different resistivities. An electrical contactor (20) has flexible fingers (22) wipably and respectively engaging the surface of each resistance layer (12, 14; 40, 50) to complete a circuit across the tracks (12, 14; 40, 50) and through the terminals (16 and 66) of the respective layers.

Abstract: A rotary potentiometer (10) having an insert molded thermoplastic resin body (12) with an annular groove (14) disposed therein about a central post (19) having an aperture (16) therethrough. A resistive element (26) is disposed about the periphery of the groove (14), an actuator arm (20) is attached to one end of a metallic shaft (18) journalled in said aperture (16) in the central post (19), and a return spring (28) has one end (29) captured within a drop slot (13) at the perimeter of the groove and the other end (31) secured in slot (11) of the shaft (18) for returning the actuator arm (20) and drive arm (22) to their initial position. A drive arm (22) has a rake type contactor (33), the drive arm (22) being secured to the operating end of the shaft (18). A terminal coupling subassembly (65) is positioned within a receiving well (40 ) in the potentiometer body (12), and is captured within the body by securing a cover (80) over the receiving well (40).

Abstract: Circuit module (10) having a row of connector pins (21) and being approximately 4 mm. 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 electrical circuit (22), and soldering (31a and 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.