Patents by Inventor William L. Mohan
William L. Mohan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5194008Abstract: Weapon training simulation system including a computer operated video display scene whereon is projected a plurality of visual targets. The computer controls the display scene and the targets, whether stationary or moving, and processes data of a point of aim sensor apparatus associated with a weapon operated by a trainee. The sensor apparatus is sensitive to non-visible or subliminal modulated areas having a controlled contrast of brightness between the target scene and the targets. The sensor apparatus locates a specific subliminal modulated area and the computer determines the location of a target image on the display scene with respect to the sensor apparatus.Type: GrantFiled: March 26, 1992Date of Patent: March 16, 1993Assignee: Spartanics, Ltd.Inventors: William L. Mohan, Samuel P. Willits, Steven V. Pawlowski
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Patent number: 4912317Abstract: An apparatus for automatically counting stacked sheet-like materials having sheet-to-sheet brightness gradients alternating between positive and negative while simultaneously eliminating problems encountered when the sheet edge reflectance characteristics have combined lambertian and specular reflective natures. Rectification of a pitch matched sensor array's data output combined with a selective disposition of the sensor and illumination optical components relative to the sheet edges to be counted based upon the maximum acceptance angle of the optical system yields the improved count data necessary to achieve accurate counting.Type: GrantFiled: September 12, 1988Date of Patent: March 27, 1990Assignee: Spartanics, Ltd.Inventors: William L. Mohan, Thomas E. Kleeman, Paul E. Ridl
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Patent number: 4827140Abstract: The method and apparatus are utilized for quickly and accurately positioning a workpiece, which is situated on a movable platform and which has at least one indicia mark thereon having a different sensitivity to a sensing means than an adjacent contrast area, to a position where the indicia mark is in registry with a registration axis.Type: GrantFiled: April 13, 1987Date of Patent: May 2, 1989Assignee: Spartanics Ltd.Inventor: William L. Mohan
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Patent number: 4809188Abstract: A material positioning and registering system for patterned material incorporating a computer with associated memory and software. A material moving system employing a drive roller with associated pressure roller in a novel pinch roller system, moves the material. A motion detecting sensing device driven by the pressure roller and an optical sensor for viewing the patterned material, each provide outputs to a computer which, in turn, provides control of material movement and optical sensor operation and may, provide signals for initiating machining of the patterned material when the pattern is properly located relative to a designated work station.Type: GrantFiled: October 17, 1986Date of Patent: February 28, 1989Assignee: Spartanics, Ltd.Inventors: Samuel P. Willits, Thomas E. Kleeman, William L. Mohan
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Patent number: 4771443Abstract: An apparatus for automatically counting stacked sheet-like materials having sheet-to-sheet brightness gradients alternating between positive and negative while simultaneously eliminating problems encountered when the sheet edge reflectance characteristics have combined lambertian and specular reflective natures. Rectification of a pitch matched sensor arrays data output combined with a selective disposition of the sensor and illumination optical components relative to the sheet edges to be counted based upon the maximum acceptance angle of the optical system yields the improved count data necessary to achieve accurate counting.Type: GrantFiled: June 12, 1987Date of Patent: September 13, 1988Assignee: Spartanics, Ltd.Inventors: William L. Mohan, Thomas E. Kleeman, Paul E. Ridl
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Patent number: 4576262Abstract: The method and apparatus are used for operating a magnetic clutch system of the type which includes a magnetic clutch having a clutch magnetizing coil which can be actuated to couple a first rotatable element to a second rotatable element when voltage is applied across the clutch magnetizing coil and which disengages the second rotatable member when voltage is disconnected from, or connected in reverse polarity across, the clutch magnetizing coil and which can include a brake with a brake magnetizing coil.Type: GrantFiled: December 27, 1983Date of Patent: March 18, 1986Assignee: Spartanics Ltd.Inventors: William L. Mohan, Samuel P. Willits
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Patent number: 4542470Abstract: An apparatus for automatically determining the predominant frequency of an unknown signal occurring in a known frequency spectrum that is many times larger than the unknown signal. The system searches the known frequency spectrum, determines and locks on to the one useful frequency that results in closed loop servo operation about the single stable null point which matches the unknown signal frequency. The lock-on occurs when a validation signal is generated based on the vector sum of two time delayed signals that are filtered reconstructions of the unknown signal. When this technique is applied to counting plural stacked objects using the apparatus of U.S. Pat. No. 4,373,135, it is possible to accomodate large mis-settings of velocity and sensor width.Type: GrantFiled: July 16, 1984Date of Patent: September 17, 1985Assignee: Spartanics, Ltd.Inventors: William L. Mohan, Samuel P. Willits
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Patent number: 4373135Abstract: An apparatus for counting stacked sheet-like materials having low or ambiguous contrast characteristics associated with their edges. A single non-pitch matched sensor is used to synthesize sensor output data that is the equivalent of that generated by pitch matched single or plural sensors. Automatic correction for errors in pitch match of the sensor and automatic velocity determination are provided. Sensor signal synthesis is accomplished through use of a multiple output tap analog delay line functioning as a discrete time processor.Type: GrantFiled: December 31, 1979Date of Patent: February 8, 1983Assignee: Spartanics, Ltd.Inventors: William L. Mohan, Samuel P. Willits, Thomas E. Kleeman
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Patent number: 4079525Abstract: An apparatus for simulating the recoil force of a weapon A recoil force generator is coupled through a linkage to the weapon in such a manner that the recoil force is substantially coaxial with the axis of the weapon over wide variations in weapon aiming positions. The simulated recoil force is also used to provide simulation of weapon recocking, round counting and empty weapon simulation.Type: GrantFiled: June 11, 1976Date of Patent: March 21, 1978Assignee: Spartanics, Ltd.Inventors: John D. Linton, Samuel P. Willits, William L. Mohan
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Patent number: 4065860Abstract: An apparatus for automatically determining without human intervention the intersection point of the axis of an aimable optical system with a plane. A scanning radiation source is imaged on a radiation sensor array by a movable focusing reflector. The signal output from the sensor array is electronically processed to determine the intersection point of the optical axis of the focusing reflector on a target plane. When the apparatus is used as a weapon training simulator, a shot sound synthesizer imparts additional realism.Type: GrantFiled: September 22, 1975Date of Patent: January 3, 1978Assignee: Spartanics, Ltd.Inventors: John D. Linton, Samuel P. Willits, William L. Mohan
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Patent number: D401872Type: GrantFiled: August 18, 1997Date of Patent: December 1, 1998Assignee: Spartanics, Ltd.Inventor: William L. Mohan