Abstract: A lamp replacement tool which provides for positively captivating lamps for ease of removing or inserting lamps from or into the type of a lamp housing that forms part of a flush mounted push button switch used in aircraft cockpit control panels. The lamp is mounted behind a display legend formed on the face of the push button and for lamp replacement the push button portion of the switch unplugs from the switch body and hinges down to expose the rear of the lamp. A friction fit maintains the lamp in the lamp housing. The lamp replacement tool includes upper and lower blades extending from a handle member in spaced apart parallel relationship. The lower blade is formed with a forked end portion having a u-shape for engaging with a flange formed on a base portion of the lamp and for embracing the base portion. The upper blade is formed with either a v-shaped portion or an aperture for engaging with a base contact protruding from one end of the lamp. The upper blade terminates in an angled lead-in.

Abstract: A liquid crystal display is described that includes gray scale capability. Each pixel of the display is subdivided into a plurality of subpixels. Each subpixel includes an effective capacitor, with the liquid crystal material contained between the effective capacitor plates, and includes a control capacitor coupled in series with the effective capacitor. By controlling the capacitance of the control capacitors of the subpixels, selected subpixels can be activated as a function of the voltage applied across the series capacitors. By controlling the number of subpixels that are activated by the applied voltage, a gray scale capability can be provided for a liquid crystal display.

Abstract: The microwave frequency characteristics of a cavity having a center conducting element and conducting cavity are modified by changing the length of the center conducting element. The resonating structure is comprised of a coaxial member providing the principal resonating surfaces. One end of the coaxial member is coupled to a wall of the cavity surrounding the center conducting member with provision for access to the interior of the center conducting member from a position exterior to the cavity. The second end of the center conducting element is free. In addition, the second end of the resonating element has threads fabricated on an interior surface and a self-locking insert positioned in the threaded portion. A threaded rod is inserted through the self-locking insert and extends beyond the center conducting element into the cavity.

Abstract: A magnetic detent housed in an end cap adapted for mounting to a hydaulic control valve having a reciprocally actuated spool movable from a neutral to a detented position. The magnetic detent including a spool extension formed with a detent groove and slidably supported in a retainer mounting a plurality of radially movable balls. A centering spring exerting a biasing force for urging the extension to the neutral position. A clapper movably mounted on and in driving contact with the balls and spaced from a magnet member generating a magnetic force. A spring member exerting a relatively light pre-load force for urging the balls against the periphery of the extension and driving the clapper into magnetically held contact with the magnet member. The pre-load and magnetic forces combining to form a detenting force locking the balls against the biasing force of the centering spring. The biasing and pre-load forces combining to form a shifting force resisting movement of the extension from the neutral position.

Abstract: A hydraulic pressure relief circuit including a main valve, a bleed flow orifice to provide stability to the main valve, a pilot valve having a differential area piston and a damping orifice in conjunction with an accumulator chamber. System pressure is limited by opening the main valve and allowing fluid flow from the system back to tank. The main valve is controlled as a bleed flow servo wherein the pilot valve meters the bleed flow from the bleed flow orifice to tank thereby controlling the opening of the main valve. Fluid flow through the damping orifice in conjunction with the accumulator chamber acts on the pilot valve to provide damping forces acting on the pilot valve with both rising and falling system pressures thereby limiting the maximum rate of pressure increase in the circuit.

Abstract: An inner cutter assembly drive means for an electric dry shaver having a flexible foil outer cutter wherein the motor operated drive means include an arcuate shaped universal drive head connection between the drive means and the walls of a cutter drive slot in the support member for the inner cutter assembly permitting downward, upward and swiveling movement of the inner cutter during reciprocation to maintain shearing contact with the undersurface of the foil.

Abstract: A laminated exothermic hair curler is described having a first sheet formed of a liquid impervious material which includes a plurality of apertures and a second non-perforated sheet of liquid impervious material which is sealed in assembly with said first sheet and provides an enclosure into which an activating fluid can enter through apertues in the first sheet. A liquid absorbent sheet is positioned within the enclosure adjacent the first sheet and chemically reactive means for generating an exothermic reaction are positioned between the absorbent sheet and the second laminate sheet. This laminate assembly is formed into an elongated curler body having an arc-shaped cross sectional configuration.

Abstract: A hair roller is disclosed which is adapted to be expanded from a substantially flat configuration into a body having an elongated, cylindrically shaped configuration which is substantially resistant to bending and buckling. The hair roller comprises first and second generally planar shaped, flexible roller members which are hinge coupled along their edges. The roller members are deflectable into a body having a generally cylindrical configuration and a fastener means is provided for maintaining the configuration. The fastener means includes a fastener member which is hinge coupled to a first of the roller members and improved means integrally formed on the other roller member for engaging the fastener member.

Abstract: A powered hair trimmer is described which is provided with a hair thinning comb. The comb guides strands of hair toward cutter teeth of the trimmer for shearing and inhibits the introduction between the cutter teeth of some of the guided strands.

Abstract: A hair roller is described which is adapted to be expanded from a substantially flat configuration into an elongated, cylindrically shaped body which is substantially resistant to bending and buckling. The hair roller comprises first and second generally planar, flexible roller members which are hinge coupled for enabling resilient deflection of the members into a body having a generally cylindrically shaped configuration. A fastening means is provided for maintaining the body in the deflected, cylindrically shaped configuration.

Abstract: An improved hair roller is described which is adapted to be expanded from a substantially flat configuration into an elongated cylindrically shaped body which is substantially resistant to bending and buckling. The hair roller includes first and second hinge coupled, flexible planar shaped roller members each having substantially the same cross sectional configuration and dimensions. An edge of each roller member is hinge coupled to a surface of the other roller member and the hinge coupled members are resiliently deflectable into a body having a generally cylindrical configuration. Fastener means are provided for fastening the body in the cylindrical configuration.

Abstract: An improved hand-held electric powered hair trimming appliance is described comprising a comb and a cutter. The appliance is adapted to be advanced along a bed of hair in the same type of combing motion as is used to style the hair and the cutter is transported simultaneously with the comb. The comb is adapted to apply a force to strands of hair being combed causing distal segments thereof to deflect away from the bed of hair. The cutter is positioned in the path of the deflected segments of hair for shearing thereof by the cutter. Predetermined spacing of the cutter with respect to the comb provides for the majority of the sheared distal segments having a predetermined length.

Abstract: A hair trimming appliance having cutter teeth movable in a reciprocating path is provided with a demountable smoothing comb. The smoothing comb enables trimming of straggling hair strands and cowlicks of a combed hair styling while limiting shearing of hair strands having a predetermined length. The smoothing comb provides for limiting extension of the latter hair strands into the path of the cutter teeth of the hair trimming appliance.

Abstract: A hand-held electrically energized hair trimming appliance is disclosed which is adapted to alternatively utilize a demountable clipper assembly or a demountable trimmer assembly. The demountable trimmer assembly includes an extending segment for supporting a trimmer cutter assembly at a location displaced from a housing of the appliance for enhancing user visibility when trimming mustaches, hair around earlobes, and the like.

Abstract: A cutter head assembly for a foil type electric dry shaver wherein the outer cutter foil is provided with a plurality of bowed arcuate outer cutting surfaces and wherein the inner cutter assembly comprises a balanced arrangement of individual blade members each having a plurality of arcuate cutting edges for engagement with the undersurface of the bowed arcuate outer cutting foil.