Abstract: A still camera system comprises a camera body which carrys alternatively a film back or a still video back having a solid-state image pickup device for receiving still images in order to record them on a recording medium. The improved system includes a display, a first means for providing the display information on the film back installing mode, and a second means for providing the display information on the still video back installing mode.

Abstract: A telephone exchange equipment system for enabling transmission of a speech message from a fresh calling party to another busy party without interruption of the connection for the original conversation. Each of the telephone sets are connected to the exchange equipment through a four-wire cable comprising a transmitting line and a receiving line. The exchange equipment is provided with a mixer having two input terminals and an output terminal.

Abstract: An improved Stirling engine has a piston and a crosshead slidably disposed inside a cylinder and secured to one another by a piston rod so as to reciprocate as a single body with a space formed between the crosshead and the piston. An oil-deflecting guard for deflecting oil which is scattered by the movement of the crosshead is disposed between the crosshead and the piston and is supported so as to move with the crosshead. A first oil-absorbing member for absorbing oil which enters the space above the oil-deflecting guard is disposed on the oil-deflecting guard on the piston side thereof. A second oil-absorbing member is disposed between the first oil-absorbing member and the piston with a space therebetween. The space between the crosshead and the piston can be connected with the inside of a crankcase by oil drainage holes.

Abstract: Data signals in each channel over a plurality of sequential frames of a time division multiplex signal as received are temporarily stored in each channel memory, and are read out together from the channel memory at a given time to form a combined data signal. A start bit signal, a stop bit signal and an address signal corresponding to the channel are added to the combined data signal to form a start-stop synchronous fresh channel signal. The resultant N fresh channels are sequentially sent out to a common transmission line as a fresh time division multiplex signal with a reduced redundancy. A plurality of sub-equipments are connected to the common transmission line and take into the data signals of a channel assigned thereto according to the address data signal.

Abstract: A seal means for use in the Stirling engine or the like, the seal means comprising: a cylinder including a piston reciprocating therein, and a buffer chamber located in one of the spaces produced at the both sides of the piston; a tank for storing the working fluid in the buffer chamber when the engine is at rest, the tank being located outside the cylinder; a means for introducing the working fluid in the tank into the buffer chamber under pressure when the engine is started; a crank shaft driven by means of the piston through a piston rod; a crankcase for accommodating the crank shaft; a plurality of packings for preventing the working fluid in the buffer chamber from entering the crankcase by flowing along the outer surface of the moving piston rod, the packings being arranged in contact with the outer surface of the piston rod; and a means for returning the working fluid leaked in the packings from the buffer chamber through the moving piston rod to the buffer chamber.

Abstract: A reproducer for reproducing a binary digital data signal from a signal received at a receiver side. A pulse train is detected from the received signal at a pulse detector. Each pulse in the pulse train sets a first D-type flip-flop, which is, in turn, cleared by a clear pulse produced by a second D-type flip-flop in response to a clock pulse just after the first D-type flip-flop is set. The output of the first D-type flip-flop is applied to a data input terminal of a third D-type flip-flop and is taken into the third D-type flip-flop by the same clock pulse. The clock pulse repetition frequency is synchronous with the binary digital data signal. Thus, the reproduced binary digital data signal is obtained on an output of the third D-type flip-flop.

Abstract: A circuit for obtaining a clock pulse synchronized to a data signal received at a receiving side, which has a plurality of clock pulses having a repetition frequency equal to that of a clock in a transmission side but being different from one another in phase. On reception of the first data bit of the received data signal, the timing of the first data bit is detected at a detection circuit in reference to the plurality of clock pulses. According to the detected timing, a selector circuit selects one of the plurality of clock pulses with a predetermined constant phase difference from the received data signal.The detection circuit comprises D-type flip-flops, and the selector circuit comprises AND gates.

Abstract: A yarn feeder for use in shuttleless looms, comprising: a fixed shaft supported at only one end by a support; a sleeve angularly adjustably mounted on the fixed shaft, the sleeve having a longitudinally extending bore through which the fixed shaft extends, the axis of the longitudinal bore being inclined to the axis of the sleeve; a roller rotatably mounted on the sleeve concentrically thereof; a rotatable shaft disposed parallel to the fixed shaft; a spool mounted on the rotatable shaft for rotation therewith; and a bracket connecting the fixed shaft and the rotatable shaft at their free ends.