Showing papers on "Bimorph published in 1977"

Dual mode laser optics control for ring laser gyro

Abstract: In a ring laser type gyro, laser optics adjustment means comprising a duo-mode bimorph device for separately controlling each of the optical length and alignment of the gyro laser optics.

Piezoelectric relay construction

Abstract: A piezoelectric relay construction in which the active element comprises a bimorph sheet having a substantially "U" shaped perforation therethrough to present an armature section having a free end deflectable within the boundaries of the sheet and a frame section for the armature section. A first contact is mounted on the free end of the armature section and a second contact is mounted in opposition to and spaced apart from the first contact on a conductive clip affixed to the frame section. Remanent polarizations are induced in the piezoelectric layers of the bimorph sheet which are in opposition in the armature section and the frame section of the sheet. Suitable terminals on the frame section interconnected with circuit means including the electrode surfaces of the bimorph sheet are provided for the application of operating voltages. Similarly, additional terminals on the frame section and other circuit means including the contacts and conductive clip provide means for connecting the relay in external circuitry to be controlled.

Phase-coded control for ring laser gyro

Abstract: In a laser gyro, laser optics adjustment means comprising a mirror within the laser optics of the gyro and mounted upon a three-terminal duo-mode bimorph device for duo-mode modulation of the laser optics. A two-stage differential amplifier is responsively coupled to a source of two mutually phase-coded reference signals for separately dithering each mode of the duo-mode bimorph device, each stage being further responsive to a mutually exclusive one of a first and second synchronously detected photodetector output of the laser gyro whereby closed loop control of the laser optics is effected.

Piezoelectric power supply for cameras

Abstract: A shutter control device is disclosed which includes a shutter which is openable to permit scene light to pass through a camera aperture, an electronic circuit for controlling the shutter to automatically establish exposure duration in accordance with the level of scene illumination, piezoelectric means such as a bimorph for providing electrical power to the circuit when stressed, and means for repeatedly stressing the piezoelectric means during each exposure cycle.

Drive circuit for controlling a movable magnetic head

Abstract: An improved drive circuitry for controlling the deflection of a bimorph comprising a pair of electrically poled piezo-ceramic elements bonded to a common substrate is disclosed which applies deflection voltage in a manner whereby the polarity is always in the poling direction of each of the elements so that depolarization of the piezo-ceramic elements does not occur. The circuitry applies a common polarity D. C. biasing voltage to both of the piezo-ceramic elements of the bimorph and also applies oppositely phased A. C. deflection signals to the respective piezo-ceramic elements.

Timed piezoelectric shutter control for cameras

Abstract: A camera is disclosed which includes a shutter latchable in an open position to permit scene light to pass through a camera aperture, an electronic circuit for producing a sudden change in voltage after an exposure period determined by the level of scene luminance, and a piezoelectric energy conversion device, such as a bimorph, which is responsive to such voltage change to rapidly change shape and thereby unlatch the shutter and allow it to move toward a closed position.

Light beam deflector

Abstract: PURPOSE:To enhance the deflection sensitivity by constituting a reflecting mirror support wherein the reflecting mirror is supported at a free end of the curve of a pair of bimorph pieces which bend to the opposite direction each other.

Flexible piezooelectric bimorph

Abstract: PURPOSE:To obtain a mechanically strong flexible piezo-electric bimorph which can be manufactured easily by using piezoelectric bodies of macro-molecular substances and composite substances.

Exposure control with piezoelectric latch control

Abstract: A camera is disclosed which includes a shutter blade magnetically latchable in an open position to permit scene light to pass through a camera aperture, flexible piezoelectric energy converter, such as a Bimorph element, movable upon being subjected to an applied voltage to push the shutter blade away from the magnet, and a light responsive electronic circuit for applying a voltage to the piezoelectric converter after an exposure duration in accordance with the level of scene illumination.

Piezoelectric type switch matrix

Abstract: PURPOSE:One contact of each switch is formed on bimorph along with 1st signal line, and the other contact is formed to the contactor which is formed electrically and mechanically to 2nd signal line. In this way, the assembly is facilitated with attenuated chattering, at the same time realizing low cost.

Piezoelectric electronic shutter control for cameras

Abstract: A shutter control device is disclosed which includes a shutter which is openable to permit scene light to pass through a camera aperture, an electronic circuit for producing a signal which varies in accordance with the level of scene illumination, and a single piezoelectric energy conversion device such as a bimorph for providing electrical energy to the circuit and for controlling the condition of the shutter in response to the signal from the electronic circuit to automatically establish the exposure period.

Piezooelectric switch matrix

Abstract: PURPOSE:In the channel switch, comb-like bimorph plates are sued to form bimorph pairs, and a large number of bimorphs are assembled in one stroke by an easy mathod to reduce the number of manufacturing steps, thereby obtaining cheap and high-quality switching equipment.