A timed lighting display adjacent the chart drive area of a polygraph indicating when the examiner and examinee have time to ask and respond to a test examination question before the next question.

A program plug formed by a circuit board with interconnected sockets which engage conventional wire-wrap posts on the back panel of a circuit shelf to provide a convenient, accurate temporary interconnection to facilitate circuit testing and expansion.

A programming apparatus capable of sequentially and automatically switching a preset information sources at preset times, comprising a time signal generator generating time signals at least at two preset times respectively for predetermined periods of time, a memory device having its operation inverted by the time signals obtained by means of said time signal generator and holding a driving device such as a motor in the driven state, a first change-over switch driven by said driving device and i...

A program shutter has a shutter mechanism comprised of at least one sector movable in opening and closing directions in response to forward and reverse rotation of a step motor to form a lens aperture. A control unit automatically controls the shutter operation and comprises an exposure quantity storage circuit for storing exposure quantity data corresponding to the brightness of a subject being photographed, a motor control data storage circuit for storing step drive number data proportional to...

A program generator automatically generates a program based on a flow-chart of a series of sequence control processes. The flow-chart is prepared while being displayed on the display area of a display means such as CRT, and when the flow-chart is complete, a program is automatically generated corresponding to the flow-chart.

A program shutter has a plurality of shutter sectors driven in opening and closing directions by a reversible stepping motor to define a lens aperture during an exposure operation. An arithmetic circuit calculates an exposure amount corresponding to the brightness of the object being photographed, and a counting circuit outputs a pulse count corresponding to the number of steps through which the stepping motor should be rotated based on the calculated exposure amount. A pulse circuit produces dr...

There is disclosed a program shutter for use in a camera. The program shutter consists of a shutter mechanism and a control portion. The shutter mechanism has sectors for defining an opening and a stepper motor for driving the sectors. The control portion produces pulses having pulse width conforming to the operating characteristic of the shutter mechanism. These pulses are used to step the motor forward or backward according to the exposure corresponding to the luminance of the subject.

Disclosed are apparatus and methods for limiting reception and conversion of television broadcast signals. The apparatus includes clock-driven screening means which selectively interrupt current flowing through control lines, and switches for selectively interconnecting a control device in parallel with the control lines.

Program cards having projections extending from one surface are formed so that they can be interconnected in the longitudinal and transverse directions to provide a continuous member of increased length or width. Corresponding edges of the cards are reduced in thickness and are provided with projections on one and perforations in the other so that they can be joined together with the overall thickness of the joined edges being equal to the normal thickness of the card. To increase the flexibilit...

A program shutter for automatic exposure control including a forwardly/reversibly rotatable step motor for opening and closing a shutter to effect automatic exposure in the control circuit for controlling the operation of the step motor. The control circuit includes stored predetermined shutter mechanism characteristic values. The reversible stepping motor varies the lens aperture in response to a pulsed lens control signal generated by the control circuit. The corresponding value associated wit...