Abstract: A circuit is shown for use within an optical scanning system utilizing at least two scanning beams for scanning a grating and a document. A high frequency reference signal is applied to a counter which also receives the grating signal. The grating signal is delayed by a counter to assure that the grating signal has been synchronized with the reference signal. As the scan across the document hits a reference target, a picture element signal is generated which is also applied to the counter. The counter is enabled upon receipt of a positive going signal from both the reference signal and the picture element reference signal. As the reference signal is a much higher frequency than the picture element signal, any error in misalignment between the grating whose signal is synchronized with the reference signal and the target is eliminated by the high frequency reference signal. A further delay counter within the circuit eliminates errors caused by the width of the target signal.

Abstract: A panel having edge sealing means comprising an outer, soft and yieldable arcuate portion; and an inner relatively rigid portion by which the sealing means is mounted to the panel and which also provides structural rigidity for the panel edge.

Abstract: An optical grating signal system for an use in a document recording system is shown having an acousto-optic modulator which utilizes the zero order beam of the modulator to scan a grating and a grating signal detector. When a modulating signal is applied to the acousto-optic modulator to generate a first order beam that records information, the intensity of the zero order beam is diminished. The same modulating signal is also applied to an amplifier which amplifies the output of the grating detector to increase the gain of that amplifier and thus maintain its output at a constant envelope level as the intensity of the zero order beam diminishes. The optics normally required to create a separate grating scanning beam are thus eliminated.

Abstract: A panel having bristle-covered access to the interior thereof and a desk having bristle-covered grooves is disclosed. The panel is comprised of a panel frame made up of panel frame assembly members which function both to retain the panel faces within the frame and to orient and retain the bristles over the access areas of the panel. An elastic material may be substituted for the bristles to achieve a similar effect.

Abstract: A panel having means for interconnecting it to other like panels, said interconnecting means comprising hook and ring connector members which are longitudinally shiftable relative to the length of the panel and are substantially flat.

Abstract: A printing device comprises a print head and a plurality of data carriers, the print head being able to print data on at least one of the plurality of data carriers; a motor for moving said print head along said data carriers; said print head being adapted to rest at one of a plurality of home positions when said print head is not in movement; said motor being reversible to change the direction of movement of said print head; a switch coupled to and controlled by said motor; said switch being controlled by said motor to assume a plurality of states, each of said states corresponding to the location the said print head at a particular one of said print head home positions; and a printing control unit for selecting which of said data carriers is to receive data printed thereon by said print head; said printing control unit being electrically coupled to said switch and to said motor; said printing control unit also acting in response to the state of said switch to select the direction of movement of said motor m

Abstract: An improved magic tee constructed to maximize the power that can be transferred from the H-plane arm to the collinear side arms and vice versa. The matching post is designed to maximize the breakdown voltage between the post tip and the walls of the E-plane arm. This is accomplished by selecting the post diameter to produce a ratio of the E-plane arm height to post diameter which develops a characteristic impedance corresponding to that of a coaxial transmission line constructed to withstand the maximum breakdown voltage between the transmission line center conductor and conductive shielding for a given shield separation.

Abstract: An angle position transducer is shown which is utilized within an optical scanning system that projects a rotating beam of light from a single point and reflects that light from a radial reflector back toward the point. The transducer includes a wedge shaped mask which is arranged between a pair of photodetectors mounted to the left and right of the mask. A second mask limits the amount of light which lands upon the photodetectors during the extreme left or right-hand rotation of the light beam. The output of the photodetectors is combined in an add and subtract circuit to produce a linear output signal which indicates the position of the rotating light beam from its far right to its far left-hand rotational position.

Abstract: An electrical connector is shown including a sheet metal contact having longitudinal edges which are rolled to form two partially opened cylinders that engage tines formed within a conductive ground plane by cutting recesses into the plane to expose the tines. The tines are designed to present sharp edges to the inner surface of the partially open spring cylinders for assuring high electrical conductivity between the contact and the ground plane.

Abstract: Document stacking device for tags or other documents, which device may comprise counter-rotating helical stacker members, is provided with a gripper mounted thereon for removing the documents from the stacker members. The hopper in which the stacking device stacks the documents is provided with laterally adjustable side walls to accommodate documents of different widths.

Abstract: An aperture stop assembly is shown which may be utilized within a laser beam optical system whose laser beam has been split into zero, first and second order beams. A lens is provided to focus the split beams upon a focal plane where an aperture stop is mounted having an aperture aligned with the desired first order beams. The reflective surface of the aperture is arranged at an angle to reflect the unwanted zero and second order beams into a series of absorption baffles found within the aperture stop housing or the aperture stop may absorb unwanted beams directly.

Abstract: A low profile reed keyswitch which includes a magnetically actuated reed switch. The reed switch is mounted parallel to the keyswitch base on a retaining fixture which resistively holds the body of the reed switch. The leads of the reed switch freely pass through the base where they are available for direct connection to an external circuit. A permanent magnet is carried in a plunger which is spring biased away from the reed switch. The reed switch is actuated when an operator depresses the plunger to move the magnet toward the reed switch.