Abstract: A mattress display unit includes a housing with a plurality of carriages mounted on rollers that are slidable into and out of the housing, and a platform for each carriage adapted to support a bed spring or mattress, wherein the platform further includes gas springs to allow the platform to move from a vertical position to a horizontal position with the application of relatively little external force.

Abstract: Aspects provide discrete-time analog, digitally programmable filtering. A filter includes a plurality of transistors coupled as a current mode circuit. Further included is a switch for use in switching the plurality of transistors in and out to tune the current mode circuit, wherein adjustable low bandwidth filtering using small silicon area without passive components is achieved.

Abstract: A modulation method, referred to as dual phase pulse modulation (DPPM), represents digital data as a series of high and low pulses whose widths represent groups of M data bits, with both the high and low pulses representing successive M-bit groups. Each of the 2M possible data values for a group of M data bits uniquely corresponds to one of 2M distinct pulse widths. This modulation method is essentially clockless, with data being decoded from a signal by detecting each pulse's width with respect to the last transition. Power consumption is reduced by having M data bits represented for each pulse transition, and by using both the high and low pulses to represent data.

Abstract: A dual phase pulse modulation (DPPM) decoder circuit processes a DPPM signal, which is in the form of a series of high and low pulses whose pulse widths represent successive groups of M data bits, so as to recover data carried by the signal. Each of the 2M possible data values of an M-bit group corresponds to one of 2M distinct pulse widths. Circuit blocks determine the width of each pulse by piping the DPPM signal through a short delay chain and using the delayed outputs to clock flip-flop registers to sample the non-delayed signal. The registered output is interpreted by logic gates to obtain the corresponding M-bit groups. The decoder circuit may have two substantially identical pulse width determining blocks, one receiving the DPPM signal for measuring high pulses, and the other receiving an inverted DPPM signal for measuring the low pulses.

Abstract: A delay locked loop circuit with improved restart features. The circuit includes a clock input, a clock output, a divider circuit, phase detector and control logic. The circuit includes a means for implementing a binary search of outputs from the control logic for generating a calibration bit, which is applied to the transmission on an output line.

Abstract: An external combustion engine burns a mixture of fuel and air to produce work. The engine contains at least one power cylinder, a compression cylinder for each power cylinder, and a moving combustion housing with a plurality of combustion chambers for each power cylinder. Each combustion chamber has a constant volume and cyclically: (1) establishes communication with a compression cylinder to receive compressed air; (2) terminates communication with the compression cylinder; (3) receives sufficient fuel from the fuel injector to create a combustible mixture of fuel and air; (4) contains the ignition of the combustible mixture of fuel and air; (5) establishes communication with a power cylinder to discharge the ignited mixture of fuel and air into the power cylinder; and (6) terminates communication with the power cylinder.

Abstract: A combination switch and socket is provided that can be easily installed without rewiring an existing fixture to give the user a closet light that automatically turns on when the closet door is opened and turns off when the door is closed. The socket can be screwed into an existing light fixture and the switch can be mounted near the door by merely attaching a bracket adjacent the door. Then, wires connecting the socket and switch can be placed where desired and even attached along the ceiling out of the way in a conventional conduit.

Abstract: In a bracket for an instrument, a swiveled yoke connects in a ball joint like coupling relationship to an extension that fastens to a support, and is useful for supporting an instrument in the category of a projector, or the like. The swivel socket provided to one end of the extension is separable, with a semicircular shoulder comprising part of an annulus provided in the upper portion of each socket half, and the socket having an extension spaced therebelow, and useful for securing the ball of the yoke therein for universal movement when the socket is assembled.