Abstract: A system and procedure for preventing and enhancing healing of Decubiti ulcers on patients, comprising the steps of placing the patient on a web adapted to support the patient, the web having a patient contacting portion and a non-patient contacting portion, the web having an opening through the web, positioned so that the opening surrounds the ulcer and prevents contact of the web with the ulcer, and using a web support system adapted to support the web by attachment only to the non-patient contacting portion, to solely support the web with a patient on it. The procedure may also include a step wherein a rocking device is used that acts through the web support system to selectively tilt the web and thereby to tilt the patient on the patient contact portion of the web, so that the pressure between the patient and the web is cyclically altered.

Abstract: A system and procedure for preventing and enhancing healing of Decubiti ulcers on patients, comprising the steps of placing the patient on a web adapted to support the patient, the web having a patient contacting portion and a non-patient contacting portion, the web having an opening through the web, positioned so that the opening surrounds the ulcer and prevents contact of the web with the ulcer, and using a web support system adapted to support the web by attachment only to the non-patient contacting portion, to solely support the web with a patient on it. The procedure may also include a step wherein a rocking device is used that acts through the web support system to selectively tilt the web and thereby to tilt the patient on the patient contact portion of the web, so that the pressure between the patient and the web is cyclically altered.

Abstract: A digital data imaging system in which the duration of each exposure pulse of a laser beam is directly locked to the speed of movement of the film. Thus the area of the film exposed during each pixel is independent of the speed of rotation of the drum. If the drum speed decreases, the exposure time is automatically increased. The rotating drum is provided with a conventional rotary encoder that produces a fixed number of signal pulses per revolution. These primary pulses are multiplied by conventional phase-locked loop technology to produce a large number of clock pulses. The duration of each clock pulse represents a fixed increment of movement of the surface of the drum that is independent of the rotational speed of the drum. These clock pulses control the timing and on-off ratio of the laser exposure pulses.

Abstract: A frequency synthesizer and method for producing an output pulse based upon a mathematical calculation with the output pulse synchronized to an input pulse train on a pulse-by-pulse basis.

Abstract: Scanning apparatus for monitoring 88 telephone subscriber lines to detect the on hook or off hook condition of the lines and to detect and count dial pulses. A multiplexing arrangement produces a sample of the incoming signal on each subscriber line in a recurring sequence. The apparatus includes a memory for storing an indication for each subscriber line as either on hook or off hook, a memory for storing the most recent sample for each subscriber line, a memory in association with a counter for storing dial pulse count information for each subscriber line, and a memory in association with a timer for storing timing information for each subscriber line. The multiplexing arrangement and the memories are coupled to a decision section of an arrangement of logic decision blocks which analyze each sample together with the stored data associated with the same subscriber line. Depending upon the particular combination of information presented to the decision section one of several end-state flip-flops is set.