Abstract: A top grill assembly for use with a conventional grill apparatus includes a J-shaped support bracket for mounting over the back of a grill enclosure and a generally elongated U-shaped supporting handle having legs pivotally mounted on the support bracket. A top grill is pivotally supported from the supporting handle near its front and captivated thereto near its rear to permit a limited range of angular movement with respect to the supporting handle. A pressurized gas cylinder is positioned between the support bracket and a cross member joining the supporting handle legs for counterbalancing the weight of the top grill. The gas cylinder may be attached to a bracket in a plurality of positions for varying the pressure applied by the top grill when lowered into the cooking position. A thermostat housing is mounted to the cross member and a cord guide maintains the electrical cord in a safe orientation.

Abstract: A support frame for supporting a tensed mask adjacent to a flat panel tube and wholly within the tube includes an outer flange, a shelf extending from the flange parallel to the flat panel and providing a support surface for the tensed mask and a skirt directed away from the flat panel and adapted to join with the remainder of the tube. The configuration provides a very rigid support frame for resisting deformation when not bonded to the other tube elements, such as during screening of the panel when the support frame alone bears the forces exerted by the tensed mask.

Abstract: An ink or moisture pickup roller for feeding ink or moisture from a reservoir or fountain roller to a transfer roller. The surface of the pickup roller is formed by a plurality of spaced circular ribs defining a pattern of generally parallel ridges and valleys along the roller normal to the axis of the roller.

Abstract: A chemical cleaning composition consisting essentially of water, a hydroxycarboxylic acid and a peroxymonosulfate compound is useful for cleaning processing tanks used in silver halide based photographic processing systems.

Abstract: An interchangeable ink fountain system for use in duplicating machines, such as offset lithographic machines. A plurality or set of ink fountains is provided for removable mounting on either a duplicating machine or a preparation station. Complementary interengaging supports are provided on each ink fountain and each of the duplicating machine and preparation station for selectively and removably mounting an ink fountain on either the duplicating machine or the preparation station. The preparation station includes a housing and light means in the housing behind the ink fountain for directing light through the ink flow through gap of the empty fountain, whereby an operator can readily visualize the gap dimensions while adjusting the same.

Abstract: In a printing machine or the like wherein sheets are delivered seriatim into a receiving tray whereat the sheets come to rest by gravity onto a stack in the tray, a device for facilitating stacking the sheets into the tray at high speed. Each sheet is directed from the machine in a path outwardly over the tray. Guide surfaces act against a lead end of the sheet to prevent upward escape of the sheets from the path. A deflecting mechanism diverts each sheet downwardly into the tray to clear the path for a succeeding sheet. A stop plate is provided beneath the deflecting mechanism for acting against a trail end of each sheet to control and guide the sheet into alignment onto the stack in the tray.

Abstract: An optical imaging head is disclosed for use with optical imaging apparatus. The optical imaging head includes a plurality of imaging devices reproducing respective segments of an original image. A reflector is included for reflecting at least a portion of the reproduced image segments from an off axis position such that those segments are directed onto a focal plane substantially perpendicular thereto and substantially undistorted. In one embodiment, the reflector includes a plurality of reflecting surfaces separated by transparent surfaces allowing at least a portion of the reproduced image segments to be reflected toward the focal plane and the remaining image segments to be directly focused onto the focal plane. In another embodiment, the reflector includes an interlaced reflecting structure allowing all of the reproduced image segments to be reflected perpendicularly onto the focal plane.

Abstract: A unitary CRT display assembly comprises a chassis pan for supporting a printed circuit chassis and components from a CRT by means of an adjustable tension strap surrounding the periphery of the CRT faceplate or by a pair of mounting lugs coupled to the mounting ears of the CRT. The construction enables the chassis pan, CRT and components to be shipped, handled and readily assembled as a unit into a manufacturer's cabinet.

Abstract: A metal protective cover for the temperature control knob on a deep fat fryer includes an outer annular ring and is formed to enclose the control knob. The control knob is surrounded by an annular backing plate that is secured by three screws. The annular ring has a diameter that is small enough to fit within the circle inscribing the shanks of the three screws and large enough to be held in place by the screw heads.

Abstract: A rolling diaphragm regulator valve is affixed in a globe type valve body and includes a non-stretchable fabric reinforced liner for covering and uncovering, by rolling action in response to changes in pressure in a control chamber, a plurality of slots in a baffle positioned between the valve body inlet and outlet. An axially movable spring-biased nose cone, mounted behind the diaphragm, provides a surface over which the diaphragm is draped for controlling substantially all movement of the diaphragm. A travel indicator is operable by movement of the nose cone to provide a visual indication of the position of the valve.

Abstract: A heating luminaire has a slightly resilient spun metal housing with a rolled bead of larger diameter formed near the circular opening thereof. A wire guard having four extensions arranged to seat within the bead is inserted through the circular opening, which is of smaller diameter than the bead, by bending one of the extensions and distorting the resilient housing. The guard is locked in place by bending the extension back toward its original position.

Abstract: A rolling diaphragm regulator valve is affixed in a globe type valve body and includes a nonstretchable fabric reinforced elastomer diaphragm for covering and uncovering, by rolling action in response to changes in pressure in a control chamber, a plurality of apertures in a baffle positioned between the valve body inlet and outlet. An axially movable spring-biased nose piece, mounted behind the diaphragm, provides a surface over which the diaphragm is draped for controlling substantially all movement of the diaphragm. A travel indicator is operable by movement of the nose piece to provide a visual indication of the position of the valve. In one embodiment the baffle is notched adjacent to a peripheral mounting surface of the diaphragm, whereat the ends of the fabric reinforcement are exposed to permit entrained gases to escape. Other embodiments include areas of the diaphragm, exposed to the apertures, that have pinholes in the elastomer surface and that have the fabric surface exposed.

Abstract: A pressure fixable single component electrophotographic toner or developer composition comprising a low melt viscosity polyamide resin composition and a magnetic oxide component. Highly conductive carbon may be added to control the resistivity of the developer particles. The toner includes a magnetic oxide component in a range of from 50 to 65 percent by weight and a polyamide resinous component in a range of from 50 to 35 percent by weight.

Abstract: A process of preparing a lithographic printing master is presented utilizing electrophotographic principles. As a result of the high density, low background images which can be developed using the disclosed novel developer composition, a high quality lithographic master can be fabricated. The novel developer comprises a low melt viscosity polyamide resin composition, a magnetic oxide component and a conductive carbon pigment.

Abstract: A pressure fixable single component electrophotographic toner or developer composition of a particle size of from 10-40 microns comprising a specialized low melt viscosity polyamide resin composition and a magnetic oxide component. Highly conductive carbon may be added to control the resistivity of the developer particles. The developer comprises from 65.50 percent of the magnetic oxide component and from 35-50 percent of the polyamide resinous component.

Abstract: A griddle includes a thick metal plate having a cooking surface and is heated from below by four infrared gas burner units. A deflector plate is mounted adjacent the outer edge of the two outer burner units and is upwardly bent at about a 45.degree. angle for deflecting infrared energy near the outer edges of the two outer burners toward the outer extremities of the bottom of the plate for producing a uniform surface temperature over the cooking surface.

Abstract: A speaker system includes crossover networks connected to a low output impedance amplifier through RF chokes. The individual outputs of the crossover networks are connected by separate wires to each of the individual speakers. RF reducing capacitors are connected across the terminals of each speaker and across the output terminals of the crossover networks. Separate back EMF resistors are connected across the speakers for dissipating back EMF signal energy. The component values in each of the crossover networks are split and balanced to present a substantially identical electrical configuration to both polarities of signal.

Abstract: A high quality amplifier includes energy dissipating resistors coupled across reactive components which are subject to shock excitation by audio signals, thus giving rise to time displacement distortion. The range of resistor values is from 5K to 100K with a preferred range being from 10K to 50K ohms. The power transformer has each winding shunted by an energy dissipating resistor chosen to produce a current draw of between 1 and 5 milliamperes.

Abstract: A sheet handling mechanism for use in a duplicating machine for duplicating images on both sides of copy sheets including a first printing couple for transferring a first image to a first side of a copy sheet and a second printing couple for transferring a second image to a second side of the sheet. The sheet handling mechanism includes a conveyor movable between the first and second printing couples. Gripper mechanism are operatively associated with the conveyor for gripping the lead end of a copy sheet issuing from the first printing couple and rotating the sheet about an axis generally parallel to the direction of movement of the conveyor to present the second side of the sheet, lead end first, to the second printing couple.

Abstract: A bidirectional rotary valve capable of use in high pressure flowpaths includes a pair of removable end retainers defining aligned ports and having a single rotatably mounted disc closely positioned therebetween. The disc has ports corresponding to those of the end retainers and is operated by link means coupled to an operating rod slidably mounted in the valve body. Rotation of the disc changes the alignment between its ports and those in the end retainers for controlling flow. The disc is loosely mounted on a bearing pin that is also loosely fitted in the end retainers to permit slight lateral movement of the disc and ready disassembly of the valve. The disc is constructed such that it will flex to a greater degree for a given pressure than the end retainers.