Abstract: An autonomous guided roofing material removal machine is provided.

Abstract: An autonomous guided roofing material removal machine is provided.

Abstract: A system and method for generating and delivering an electronic form to a user. One embodiment of the disclosed system comprises a file management sub-system for receipt and management of at least one standard form in electronic format. The system also includes a user sub-system for selection of a desired form. In addition, the system includes a mapper sub-system for mapping each of the at least one standard forms into a form file identifying the graphical and/or textual elements of the standard form, at least one data field to placed on the form and an indication of where the at least one data field is to be placed based on the identified graphical and/or textual elements. Also, the system includes a delivery sub-system operably connected to the file management sub-system, the user sub-system and the mapping sub-system and capable delivering an electronic form comprising the desired form into which data retrieved from the user sub-system is inserted.

Abstract: An anti jitter circuit for reducing time jitter in an input pulse train comprises an integrator, a DC removal circuit and a comparator. The anti jitter circuit also has a feedback loop effective to suppress phase deviation of the output pulse train in response to jitter.

Abstract: A mechanical target device utilizing a plurality of targets, a stand, a rod, reset plate and reset lever provides practice or competition opportunities for markspersons. The target device mechanically allows the first contacted target to activate a rod that locks the other target in place. The reset plate must then be contacted to reset the first contacted target to its original position.

Abstract: A system and method for generating and delivering an electronic form to a user. One embodiment of the disclosed system comprises a file management sub-system for receipt and management of at least one standard form in electronic format. The system also includes a user sub-system for selection of a desired form. In addition, the system includes a mapper sub-system for mapping each of the at least one standard forms into a form file identifying the graphical and/or textual elements of the standard form, at least one data field to placed on the form and an indication of where the at least one data field is to be placed based on the identified graphical and/or textual elements. Also, the system includes a delivery sub-system operably connected to the file management sub-system, the user sub-system and the mapping sub-system and capable delivering an electronic form comprising the desired form into which data retrieved from the user sub-system is inserted.

Abstract: An anti-jitter circuit has an integrator storage capacitor. A charge pump derives from an input pulse train at least one charge packet during each cycle of the input pulse train and supplies the charge packets to the storage capacitor. A controlled current sink operating in conjunction with a high impedance low pass filter continuously discharges the storage capacitor to create a sawtooth voltage waveform having a mean d.c. voltage level. A differential comparator compares the sawtooth voltage waveform with the mean d.c.

Abstract: A noise reduction circuit useful as a clock restoration circuit includes a DC removal circuit for removing a DC level from an input pulse train, an integrator for integrating the input pulse train after a DC level has been removed, a comparator for comparing the integrator output with a threshold value (Vmp) to detect for a missing pulse, a pulse generator inserting into the input pulse train an additional pulse delayed with respect to any missing pulse, and an output circuit for generating an output pulse train from the integrator output.

Abstract: A phase noise reduction circuit for reducing phase noise in an input pulse train consisting of pulses which are all of the same length and which, in the absence of phase noise, have a nominal frequency f, includes a DC removal circuit for removing a DC level from the input pulse train, an integrator for integrating the input pulse train after a DC level has been removed therefrom by the DC removal circuit and a comparator for deriving from the integrated pulse train an output pulse train containing periodic transitions at said nominal frequency. The input pulse train may be derived using a monostable circuit.

Abstract: A clay target launcher designed to be operated by a single person during target practice includes a base with a rotatable launching arm mounted thereon, which accommodates a clay target, a trigger to latch the arm in a cocked position and movable to release the arm, and a foot pedal. A spring is mounted between the foot pedal and the throwing arm to apply rotational bias to the arm, and a trigger release actuator is attached between the foot pedal and the trigger. When the foot pedal is in its upper position, the spring is not tensioned, so there is no danger of accidentally releasing the target. When the user is ready to release a target, he depresses the pedal with his foot, thus tensioning the spring. When the pedal is fully depressed, the trigger release actuator is effective to move the trigger to allow the throwing arm to rotate and launch the target.

Abstract: A frequency synthesizer of the phase lock loop type including a reference frequency source, a voltage-controlled oscillator and a frequency divider connected to the oscillator output to divide the output frequency by a selectively-variable integer N. The outputs of the frequency divider and the reference frequency source are applied to a phase comparator which has an output connected to a filter. The filter output is applied through a multiplier, having a multiplication factor n proportional to N, to the input of the voltage controlled oscillator. The frequency divider and the multiplier are controlled by the same control means in order to keep the loop gain constant, irrespective of the amount of change in N.

Abstract: A phase comparator indicating a phase difference range of n .times. 360.degree., between two input signals, comprising edge triggered shift registers, for dividing the input signals by n, means for modulating the width of the resulting output pulses in proportion to the phase difference of the input signals, and integrating means to combine the modulated pulses into a time-averaged signal which is indicative of the phase difference.