Abstract: Irradiation of a target material disposed around a reel rotated about an axis perpendicular to the sweep of a beam of radiation produces a linear relationship between the depth into the target material and the radiation dose received. Where the core of the reel is sufficiently transparent to the radiation beam, target material located on the backside of the reel is also irradiated, creating a constant relationship between depth into the target material and the radiation dose received. The depth/dose profile can be tuned to a constant value by varying parameters of the irradiation process, such as target material thickness, target material density, reel diameter, and energy of the applied beam of radiation.

Abstract: An electronic anti-theft system for vehicles having a common signal generator and speaker for both the alarm siren and the arming chirp, in which the volume of the arming or disarming chirp can be set to a desired level. A control circuit is detailed which allows the volume of the arming chirp to be attenuated.

Abstract: A shock sensor includes a mass suspended in a flexible support arranged to resonate when subjected to a mechanical shock, a microphone spaced closely to the mass, the mass and microphone forming a first air pressure chamber with the flexible support for transmittal therethrough of air pressure waves from the resonating mass to the microphone, the microphone arranged to produce an electronic signal when it detects changes in air pressure from the pressure waves traveling through the chamber.

Abstract: A vehicle security system includes a transmitter, a receiver, a timer, a controller and an alarm circuit. The transmitter transmits selectively an encoded signal when activated by the user. The receiver develops a decoded signal in response to reception and recognition of the encoded signal. The decoded signal has a reception time duration commensurate with a transmission time duration of the encoded signal. The timer develops a momentary timer output signal. The timer output signal is developed in response to initial application of the decoded signal to the timer in the absence of ignition voltage and is developed after a selected timer duration in response to continuous application of decoded signal to the timer and the presence of the ignition voltage only if the reception time duration exceeds the selected time duration. The controller develops a binary signal. The binary signal switches states in response to each occurrence of the timer output signal.