Abstract:
An ultraviolet sensitive, gaseous discharge detector of the Geiger-Muller type has a low spurious count rate and a prolonged lifetime at elevated temperatures. The gas filling of the detector comprises a gas mixture of neon and argon with a small amount of hydrogen added. The gas mixture of neon and argon substantially determines the breakdown voltage and ionization efficiency characteristics of the gas filling. The essential function of the hydrogen is to rapidly de-excite argon metastable atoms which would otherwise cause excessive spurious discharge counts.
Abstract:
Improved apparatus for use in plant security and related applications to give a visible signal, at a central location, which is spatially associated with the location of the signal source. The improvement consists in using a closed circuit television monitor to observe a representation of premises to be secured, and electronically inserting indicia into the reproduction at the monitor, at the locations of any security signal sources which are responding to violations.
Abstract:
A method and apparatus for removing accumulated paint from paint racks used to support articles to be spray painted. Frame members of the paint rack are enclosed in a substantially skin-tight relation by one or more flexible inflatable boots. To remove accumulated paint from the exterior of the paint rack, the boots are internally pressurized causing the expansion of the boots and thereby the cracking and peeling of the accumulated paint.
Abstract:
A computer type flash apparatus includes a switching device, a sensing transmitter and a flash device. The switching device is selectively operable for providing a contact closure to fire the flash device, which, in turn, produces light for the illumination of a scene to be photographed. The sensing transmitter provides a quench signal upon receipt of a predetermined amount of light from the scene. The quench signal is applied through a capacitor to the gate terminal of a silicon controlled rectifier (SCR) to trigger the SCR thereby actuating a quench circuit in the flash device. The operation of the quench circuit terminates the production of light by the flash device. A resistor is connected between the gate and cathode terminals of the SCR. When the flash device is fired, a signal representative thereof effects the appearance of a voltage across the resistor to inhibit noise signals from falsely triggering the SCR until the quench signal is generated by the sensing transmitter.
Abstract:
A counter and a plurality of SCR''s normally connect only one of a plurality of storage capacitors to a flash tube until the latter is fired, at which time a clock is started to advance the counter. The latter then connects the capacitors in discharging relationship to the tube in repeated sequence until a photocell has received a predetermined quantity of light reflected from a subject to be photographed which receives the light emitted by the tube. At that time, the clock and the counter are stopped and a quench tube is fired which effectively short-circuits the flash tube and terminates its production of light. Each capacitor is recharged following its discharge into the flash tube.
Abstract:
The values of a plurality of data signals to be plotted against time as traces on a moving photosensitive record sheet are sampled by being simultaneously compared continuously with a cyclically repeated ramp voltage by a plurality of comparators. Each of the latter produces an output each time that the ramp voltage reaches the value of the corresponding signal. The ramp voltage is synchronized with the horizontal sweep for a fiber optics cathode ray tube, across the optics strip of which the sheet is advanced at right angles. A logic device for each signal unblanks the normally blanked beam of the tube for a period in each sweep to mark a dynamic line on the sheet. Each period is that in which the ramp voltage lies between the two values of the corresponding signal at which the corresponding comparator output is produced for the present and the immediately previous sweeps. When these two values are equal, an RC circuit responsive to the corresponding comparator output, and an amplifier adjusted in accordance with the speed of the sheet, cause the beam to mark a fixed length static line on the sheet having an intensity which is a direct function of the sheet speed.
Abstract:
In a multiple trace recording system of the type which might use a CRT as the writing instrumentality, means are provided for positively identifying each trace on the record. The identifying means includes means for printing, along one margin of the record member, ordinal numbers representative of the several input signal channels. The identifying means further includes means for generating a transverse trace line extending from a point adjacent to each of the imprinted numbers to a point of juncture with the corresponding data trace.
Abstract:
The specification discloses apparatus which acts to monitor the presence of logic signals indicative of a control condition at a majority of the circuit elements sampled. A plurality of JK flipflops are cascaded, with a source of clock signal connected to the toggle input of the first flip-flop, and the output of each flip-flop fed to the toggle input of the next succeeding flipflop, the output of the last flip-flop being connected to an indicator. The J and K input terminals of the flip-flops receive biasing signals from sampled circuit elements which are combinatorially connected to the J and K flip-flop terminals.
Abstract:
An apparatus for providing a continuous path along an axis in a chamber only when the chamber rotates about the axis. The apparatus includes a plurality of discs or members in the chamber, with each member having a path forming portion in approximately its center of floatation which, if the member is uniform, is the center of the disc. The members are stacked upon each other with the plane of each member being substantially perpendicular to the axis. The chamber has a cross sectional area measured perpendicular to the axis which is of a size to permit the members to align themselves to provide the continuous aperture about the axis when all of the members are in a predetermined position. There is additionally provided a fluid in the camber so that as the chamber is rotated about the axis, when there is fluid in the chamber, the member move to their predetermined positions, centering the center of floatation to yield the continuous path.