Abstract: A therapy system includes a patient support apparatus and a pneumatic therapy device that is coupleable to the patient support apparatus. The therapy device may receive power and air flow from the patient support apparatus.

Abstract: A hand-propelled self-contained movable electrical snow-melting device which has a frame on which is mounted an enclosure formed by a bottom heat-conductive plate and an upper cover. An electrical heater is positioned within the enclosure and a portable electrical power supply is supported by the device and is connected to the heater.

Abstract: A display comprising a cathode ray display tube (1) having an electromagnetic deflection yoke (2) is described. A pair of first deflection coils (7,6) are located symmetrically about the longitudinal axis of the tube (1) on opposite sides of the yoke (2) for producing within the tube (1) a first magnetic deflection field. A pair of second deflection coils (8,20) are similarly located symmetrically about the longitudinal axis on opposite sides of the yoke (2) for producing within the tube (1) a second magnetic deflection field at right angles to the first deflection field. The display is further provided with a pair of first cancellation coils (4,3) connected to the first deflection coils (7,6) for producing a first cancellation field which tends to cancel a first stray field produced by the first deflection coils (7,6). Support means (10,11) secure the first cancellation coils symmetrically about the longitudinal axis.

Abstract: An optical fibre communications link, for connecting a peripheral device to a computer system is presented, which includes circuit arrangement for generating a hybrid video signal, a device for transmitting such a signal along an optical fibre between the computer system and the peripheral device, characterized in that the transmitted video signal includes a reference pulse of predetermined amplitude, compensation devices for correcting changes in the characteristics of a received video signal which result from the optical communication link, and circuitry for using the reference pulse in a received video signal in order to control the compensation means.

Abstract: A gas fire has a fire bed shaped to receive simulated solid fuel. Gas burners direct flames onto the firebed through the simulated fuel and out through a heat exchanger. The fuel glows in an appealing manner.

Abstract: A gas fire comprises a fire bed made of refractory material with a plurality of holes therein, mounted within a combustion chamber so as to divide the combustion chamber into an upper and a lower portion, gas burners mounted so as to direct flames substantially across the upper surface of the fire bed, and a heat exchanger with a primary and secondary section, and respectively, to provide extended circulation of combustion products. Inlet of the heat exchanger is located at the rear wall of the lower portion of the combustion chamber, so that combustion products are drawn through the holes into the lower portion for entry into the heat exchanger. Simulated solid fuel elements are supported on a grid above the fire bed.