Abstract: A multi-stage pressure switch (10) transduces partial vacuum pressure levels to corresponding electrical outputs. The switch (10) comprises a vacuum housing (12) having a bore (16) therein and a port (14) at one end. Positioned within the bore (16) and in engagement with one end of a coaxial spring (48), is a rubber piston (50) having an integral lip seal (54) which wipably engages the wall of the bore, the piston (50) also having a socket (56) disposed therein. A U-shaped switch drive arm (38) has a drive arm extension (40) and ball (41) received within the socket (56) of the rubber piston (50). Contactors (42, 43, and 44,45) are mounted on opposite sides of the drive arm (38). A switch housing (28) having two sets of terminals (32, 33, and 34,35) extending into the housing and terminating at different levels is joined with the vacuum housing (12).

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 preprogrammed slide switch assembly (10) is provided for the simultaneous opening or closing of a series of switches disposed within a housing (12). A slider (60) having a grip (66) extending through an longitudinal opening (14) in the housing (12), has a plurality of contactor bars (54) attached thereto and extending laterally, each in a predetermined direction. A two part base (22) has each part (24, 26) molded about a plurality of terminals (28) so that when the parts (24, 26) are coupled together, pairs of oppositely disposed terminals (28) will each be positioned for engagement with a respective one of the lateral contactor bars (54). The lateral contactor bars (54) engage either one or both of the terminals (28) of the respective set of terminals in one of two transverse positions of the slider (60), and in a predetermined pattern of open and closed switches.

Abstract: A multiple-function electrical switch has an automatic return to an initial position upon release of the shaft (60). An annular drive (70) mounted upon the shaft (60) has a rotary contactor (100) and momentary switch contacts (90,92) secured thereto, and a torsional spring (110) is mounted in a cover (36) enclosing one end of the housing (11). As the shaft is rotated, a tongue (78) on the driver (70) engages the torsional spring (110) which will effect return of the driver and shaft to its initial position upon release of the shaft. The tongue (78) is received in a pocket (56) located in the cover (36) such that the shaft (60) may be moved axially at only one rotational position, such movement effecting engagement between the momentary switch contacts (90,92) and terminals (44,46) disposed in the cover.

Abstract: In a multi-layer ceramic package, a plurality of ceramic lamina each has a conductive pattern, and there is an internal cavity of the package within which is bonded a chip or a plurality of chips intereconnected to form a chip array. The chip or chip array is connected through short wire bonds at varying lamina levels to metalized conductive patterns thereon, each lamina level having a particular conductive pattern. The conductive patterns on the respective lamina layers are interconnected either by tunneled through openings filled with metalized material, or by edge formed metalizations so that the conductive patterns ultimately connect to a number of pads at the undersurface of the ceramic package mounted onto a metalized board. There is achieved a high component density; but because connecting wire leads are "staggered" or connected at alternating points with wholly different package levels, it is possible to maintain a 10 mil spacing and 10 mil size of the wire bond lands.

Abstract: A method for producing a rotary on-off switch in which a contactor plate is formed from sheet metal stock, integrally molded with a switch housing and thereafter blanked from the sheet metal stock. The switch housing has an integral set of circumferentially spaced abutments at regular intervals in an internal socket opening of the housing. A first switch operating member having a stem and a plurality of crowned teeth is internally mounted in the housing. A second switch operating member also has a set of crowned teeth disposed complementary to those on the first switch operating member, and also is disposed in the housing so that upon coaxial movement of the two operating members the second switch operating member will be caused to rotate abruptly after the second switch operating member has been displaced axially sufficiently to disengage the second switch operating member from the abutments in the housing.

Abstract: A method for producing a thick film circuit (30) including a copper conductor pattern (19), thereby obviating the need for expensive precious metal compositions. In the process, a fritted copper paint (16) is applied to a ceramic substrate (18) and fired at a temperature of 850.degree. C. to 950.degree. C. and is oxidized. Concurrently, the paint (16) is adhesively joined to the nonreactive and nonconductive ceramic substrate (18). Next, a resistor paint (20) is applied in overlapping relationship with the air-heated copper conductor pattern (19) and fired at 850.degree. C. to 950.degree. C. The entire unit is then fired in a reducing atmosphere at a temperature of 260.degree. C. to 450.degree. C. to reduce the oxidized copper. The air-fired resistor pattern (21) can either be protected by a coating (40) or unprotected during the reducing atmosphere firing.

Abstract: An inexpensive minimum component loudspeaker which dispenses with the need for either a spider or top plate, consisting of a back plate having a centrally disposed hollow post, an annular permanent magnet mounted on the back plate and closely adjacent the post, and a basket having a central portion lying flat against the permanent magnet and including a central opening concentric with the post and a folded back annular flange which lies flatly against the base of the basket to form a double layer of metallic material disposed closely adjacent the confronting surface of the post to form an air gap. The additional metallic material channels the magnetic lines so that there is a maximum concentration of gauss lines within the air gap. A single piece combination cone and dust cover having mounted thereto a bobbin with coils to form a voice coil is precisely located in relation to the air gap by means of a collapsible shim gauge.

Abstract: A multi-stage latching device for a carburetor which controls the idle speed by defining various throttle plate positions according to deceleration sensor switch, air conditioning switch and ignition switch states. The mechanism which moves the throttle plate consists of a primary force coil which energizes an armature against spring return and the position of the armature coupled through a shaft establishes the idle speed. The throttle position is determined by any one of three adjustably disposed latch coils which when energized, magnetically couple to a casing to define a stop. A circuit control associated with each latch deenergizes the primary force coil while maintaining the magnetic coupling of the stop. With primary force off, the return spring forces the armature back against the energized stop and hence establishes the throttle position and idle speed.

Abstract: A process utilizing tandem insert molded controls for effecting a plurality of electrical control functions. A power switch, variable resistance control, and momentary switch are each contained within insert molded housings or bases which are mounted one against the other in a linearly aligned relationship. The alignment is maintained by an impact system consisting of a metallic front plate having side straps with end fingers curled over to secure the confronting edges of a heat-treated back plate, the front plate/side straps/back plate construction capturing and maintaining alignment of the controls for mounting on a panel board. A plurality of the controls are individually operated by two relatively rotatably and relatively axially movable shafts which independently actuate the respective controls. The shafts each have an annular rotor mounted on an end thereof, the rotor containing a cam lobe on one face and on the oppositely disposed face resiliently bent collector arms and a resilient arm.

Abstract: An electromagnetic actuator comprising a housing of magnetizable material defining a stationary pole, a bobbin supported by the housing and having an interior bore, an armature comprising a permanent magnet provided with a pair of magnetic poles and movably supported by the bobbin, a pair of coils circumposing the armature and having wire end portions and means securing the wire end portions to the bobbin. The bobbin comprises a pair of bobbin sections and means connecting the bobbin sections, each bobbin section having an inner and an outer rim and supporting one of the coils between the rims. A collar section integrally connects each of the bobbin sections and comprises a keeper for securing the wire end portions and a radially extending vent bore.

Abstract: A method for producing a rotary on-off switch in which a contactor plate is formed from sheet metal stock, integrally molded with a switch housing and thereafter blanked from the sheet metal stock. The switch housing has an integral set of circumferentially spaced abutments at regular intervals in an internal socket opening of the housing. A first switch operating member having a stem and a plurality of crowned teeth is internally mounted in the housing. A second switch operating member also has a set of crowned teeth disposed complementary to those on the first switch operating member, and also is disposed in the housing so that upon coaxial movement of the two operating members the second switch operating member will be caused to rotate abruptly after the second switch operating member has been displaced axially sufficiently to disengage the second switch operating member from the abutments in the housing.

Abstract: Method of and apparatus for automatic defibrillation of the cardiac ventricles of a heart wherein both the mechanical and electrical activities of the ventricles are sensed and used as operating inputs to the controls. Electrical activity is detected and measured with a pair of electrodes, and the waves of an electrocardiogram (ECG) are analyzed. When such electrical analysis indicates that ventricular fibrillation is present and persists, an electrical circuit is actuated for detecting mechanical pumping activity of the heart. Mechanical pumping activity is measured by the change in impedance between the pair of electrodes in one of the ventricles. The change of ventricular impedance is caused by the varying volume of blood contained within the ventricle and depends upon whether the ventricle is in a contracted or a relaxed state. The defibrillator is actuated only when both the mechanical and electrical activity of the ventricle indicates a need for defibrillation.

Abstract: A lateral exhaust manifold system for the preheat section of a tunnel kiln comprises a longitudinal duct and input tube. The duct is triangular in shape and has a plurality of spaced apart apertures and a corresponding plurality of cones, the large diameter end of each cone circumposing a respective one of said apertures. The input tube is disposed adjacent the opposite side of the tunnel kiln and has a plurality of spaced apart jets each disposed opposite a respective aperture in the longitudinal duct, and a plurality of spaced apart apertures each located intermediate the jets, the spaced apart apertures and for venting air laterally across the kiln and upwardly along the adjacent wall. A blower vents an exhaust stack connected to an end of the duct. Air curtains control the entrance and exit of the preheat section of the kiln.

Abstract: Disclosed is a glass bonded electrical resistor element and composition composed of glass binder, refractory material to provide form stability during firing and electric conductivity imparting materials of noble metal and noble metal oxides. Manganese may also be present. Oxides of Ru and Ir are disclosed as being significant.

Abstract: A service column comprising a pair of channels in a main member for receiving electrical conductors providing power and communication services from above a suspended ceiling to a work area in an office. The suspended ceiling contains inverted T-rails supporting a plurality of ceiling panels. An adapter bracket assembly fastened to the upper end of the main member of the service column secures the main member to one of the inverted T-rails. The inverted T-rail supporting the service column is defined by two split legs joined together by a web. The adapter bracket assembly abuts against the web and a double C-clamp secured to the adapter bracket assembly with a fastener grippingly engages the split legs of the inverted T-rail. A standard secured to the lower end of the main member of the service column adjustably supports the column from the floor and a sleeve slideable over the main member conceals the standard from external view.

Abstract: A waste treatment apparatus operated either by gravity or by positive displacement pump in which a variable inflow of contaminated liquid is aerated, clarified, and filtered. The filtered liquid is used to backwash one of at least a pair of rapid sand filters, while the other rapid sand filter is being utilized. The alternating cycle of backwashing and filtering by the respective rapid sand filters, all of which is integrated with overall filtering operation, insures that at least one filter is fully operative at any time.The apparatus is adapted for variable inflow and can adapt to such unfavorable exigencies as overtaxing inflow and clogging at the rapid sand filter or at an earlier stage of contaminated liquid treatment. Sensors are located suitably throughout the apparatus to adjust the system to overflow conditions or clogged conditions, and the flows can be redirected through a preferred stage.

Abstract: An airborne image camera, its respective image scan plate and image Cathode Ray Tube (CRT) forms a display which simulates runway lights and Visual Approach Slope Indicator (VASI) for the pilot so that the display portrays what the pilot would see, were it not for limited visibility conditions. The on-board CRT continuously enacts and displays, according to position of the aircraft, what would otherwise be visible to him as the runway lights of an illuminated runway, were it not for obscured vision. This is obtainable by RF microwave signals from a plurality of emitters and reflectors which substitute RF energy for visible spectrum light, with the RF energy received and processed by instruments in the aircraft to create a continuous display on the CRT.

Abstract: In a cabinet for electrical or electronic equipment, of the type in which the components of the equipment are mounted on vertically disposed printed circuit boards carried by supports movable on slides within a metal casing so that the supports can be easily withdrawn from the casing, the usual rigid drawer forming the support is replaced by a horizontally disposed printed circuit board movable in slides in the casing which also form connectors making electrical connection with conducting tracks on the horizontal printed circuit board. The horizontal board also carries a set of similar connectors to receive the vertically disposed printed circuit boards. The connectors are of the type whose contacts can be held open during insertion or extraction of a printed circuit board so that zero force is required for insertion or extraction.

Abstract: A cementitious product is produced from a combination of two groups of materials: the first group consisting of lime or Portland cement or Linfan (which is defined as a thermally cracked shell of calcium sulfate surrounding a core of lime) or Linvein (a lime particle coated with cracked calcium carbonate); and a second material consisting of thermally cracked fly ash which is cracked by thermally quenching such finally divided particulate material from an elevated temperature at least above 300.degree. C. and preferably higher than 450.degree. C. to ambient or below ambient temperatures.The two materials are blended together. They are mixed with water, placed in a form, and then allowed to cure. Filler materials can also be used in the form of sand, gravel, and other aggregates, depending upon the strength and compositional characteristics desired in the final product.