Abstract: A system for forming desired magnetization patterns in permanent magnet structures such as magnetic brush cylinders cores, utilizes a fixture having a plurality of magnetizing members selectively orientable to the permanent magnet structures and couplable to a capacitor discharge magnetization apparatus. Magnetic tip members can have different flux focusing end configurations to form corresponding polarization patterns in the permanent magnet cylinder structures.

Abstract: An electromagnetic camera shutter including an electrically conductive shutter blade and electrically conductive springs for urging the shutter blade into a first or a second position from a compressed position between the first and the second position. A permanent magnet is associated with said shutter blade and a control device applies a current through the springs and the shutter blade in a first direction to generate an electromagnetic field between the shutter blade and the permanent magnet so as to move the shutter blade from the first position to the second position and alternately, applies a current through the springs and the shutter blade in a second direction so as to move the shutter blade from the second position to the first position.

Abstract: An apparatus for selectively inverting an external magnetic field in a magneto-optic recording system so that information can be selectively recorded on or erased from a magneto-optic recording element of the system moving through said field, the apparatus comprises a permanent magnet having its north and south poles oriented along its cross-sectional dimension. A core having a shape which is adaptable to selectively impart a predetermined magnetic field to the permanent magnet for rotating the permanent magnet, which directs a flux generated by the predetermined magnetic field for reducing electro-magnetic interference, and which defines a preferential orientation of the magnet for selectively maintaining the magnet in the preferential orientation.

Abstract: A self-acting air bearing operable at very high speed in a non-vertical spin axis in a beam scanning optical system provides precise rotation of a rotable hologon disk. Pretreatment of the bearing surfaces with a residual boundary lubricant allows reliable operation over an extended series of start/stop cycles. The tilt of the bearing/disk assembly allows the construction of an optical system more compact than in conventional hologon beam scanning systems.

Abstract: Beam scanning system includes a rotatable element for receiving a stationary light beam at successive element facets to thereby impart a scanning motion to the light beam so as to scan a beam receiving medium. Deviation in the mechanical or optical performance related to each successive facet are corrected by use of a high-speed beam deflector operated in either a closed loop or open loop servo system. The beam deflector includes a unique piezoelectric plate and reflecting body structure, wherein parallel plates of piezoelectric material are bonded at selected locations to a reflecting body with flexible adhesive. The plates are supported by a platform and operatively connected to a plate driving means to effect motion of the body in a push-pull arrangement with respect to the platform. The resulting structure has a high resonant frequency even though a reflecting body in the form of relatively large glass mirror may be employed.

Abstract: Improved, high-speed beam deflector includes unique piezoelectric plate and reflecting body structure, wherein parallel plates of piezoelectric material are bonded at selected locations on a reflecting body with flexible adhesive. The plates are operatively connected to a plate driving means to effect motion of the reflecting body in a push-pull arrangement. The resulting structure has a high resonant frequency even though a reflecting body in the form of relatively large glass mirror is employed.

Abstract: A driving apparatus for imparting motion to an image sensor is disclosed that includes a frame structure, a support spring coupled to the frame structure, a support structure coupled to the support spring and a foundation structure, wherein the support structure keeps the support spring suspended above the foundation structure, a first drive solenoid coupled to a first side of the frame structure, and a second drive solenoid coupled to a second side of the frame structure that is adjacent to the first side of the frame structure wherein at least one drive solenoid includes a solenoid body, a magnetic coil, and a magnetically deflectable solenoid beam.

Abstract: A responder target for a magnetic detection system includes a signal element of high permeability low coercivity magnetic material such as permalloy or amorphous metal, and a control element of ferric oxide powder having the formula Fe.sub.3 O.sub.4 dispersed in a polymer binder. The ferric oxide powder having a coercivity H.sub.c in the range of 50-150 Oe and a particle size of 20-100 .mu.m, dispersed 20-35% by weight in the polymer binder. The ferric oxide powder in the binder is coated on a substrate to form a control element strip, laminated to the signal element, and chopped into lengths to form the responder target. Alternatively, the signal element strip is laminated to a support layer, and the ferric oxide is coated by extrusion over the signal element.

Abstract: A responder target for a magnetic detection system includes a signal element of high permeability low coercivity magnetic material such as permalloy or amorphous metal, and a control element of ferric oxide powder having the formula Fe.sub.3 O.sub.4 dispersed in a polymer binder. The ferric oxide powder having a coercivity H.sub.c in the range of 50-150 Oe and a particle size of 20-100 .mu.m, dispersed 20-35% by weight in the polymer binder. The ferric oxide powder in the binder is coated on a substrate to form a control element strip, laminated to the signal element, and chopped into lengths to form the responder target. Alternatively, the signal element strip is laminated to a support layer, and the ferric oxide is coated by extrusion over the signal element.

Abstract: A device and method for electromagnetically activating the shutter of a camera to provide different aperture openings comprises:an armature having a core and a coil, the core is capable of receiving current, and the armature will produce a first magnetic field;a movable magnet member that produces a second magnetic field at one of its two ends, the second magnetic field is coupled to the first magnetic field and the other end of the member is coupled to one or more shutters; anda circuit capable of receiving current coupled to a coil for setting the direction of current flow in the coil to a first direction or a second direction or for denying the presence of current flow in the coil so that when the coil receives no current a first magnetic field will not be present and the member will be at a first location and move one or more shutter elements to block the aperture and allow no light to enter the camera, and when current flows through the coil in a first direction the member will be attracted by the first

Abstract: A system for electromagnetically activating the shutter of a camera to provide different aperture openings by providing: an armature comprising a core and a coil, the core is capable of receiving current and the armature will produce a first magnetic field; a movable magnet that produces a second magnetic field, the magnet is positioned within the core in a manner that a first gap, a second gap, a third gap, a fourth gap, a fifth gap, a sixth gap, a seventh gap and a eighth gap will contiguously surround the magnet and be present between the core and the magnet so that the second magnetic field is coupled to the first magnetic field and the magnet is coupled to the shutter; and means coupled to the current means and the coil for setting the direction of current flow in the coil to a first direction or a second direction or for denying the presence of current flow in the coil so that when the coil receives no current a first magnetic field will not be present and the magnet will be at a first location and move

Abstract: Apparatus for thermal printing of a color image includes a donor member that contains a set of color stripes for each pixel in a repeating pattern in the cross-scan direction and in continuous stripes in the page scan direction. As the printing beam is scanned across the donor, it addresses the sequence of color dyes and if the beam is of sufficient intensity at any one of the color stripes; it causes the dye to transfer to the receiver material. To compensate for variations in the scan rate of the beam, light reflected from the donor member is used to form color timing signals that correspond to the color stripes of the pattern scanned by the beam. The timing signals align the modulation of the beam to the color stripe pattern of the donor member whereby accurate color registration is obtained.

Abstract: A method and apparatus for producing complex magnetization patterns in a sheet of magnetic material. A fixture having top and bottom plates with a matching conductor pattern embedded in one surface of each plate. The conductor pattern covers substantially the entire surface of each plate. To magnetize the sheet of magnetic material, it is placed between the plates and a magnetizing current is applied to the conductors with a capacitor discharge magnetizer. The resulting sheet of magnetized material is useful as a magnetic deactivator for electromagnetic security articles.

Abstract: An improved sheet-position detection system for apparatus having a sheet feed path and a use location(s). The position detection system includes a first capacitive sensor including a first pair of parallel plate members located in opposing relation on opposite sides of the feed path plane and centered on a desired lead sheet edge position. A second capacitive sensor includes a second pair of parallel plate members that are located in opposing relation on opposite sides of the feed plane and are centered on a desired trail sheet edge position. A bridge circuit applies potentials across the pairs of plate members in a circuit configuration such that output signals of the first and second sensors are subtracted, and when the combined outputs of the first and second sensors is zero, a feed sheet is indicated to be centered between the sensor means.

Abstract: Disclosed herein is a piezoelectric flexure device in which the piezoelectric element(s) thereof comprises a flexible piezoelectric layer (e.g. a suitably polarized polymeric film) which is tightly wound about an axis to produce a plurality of substantially concentric layers of piezoelectric material. Positioned between adjacent piezoelectric layers are conductive layers which function as electrodes for either applying an electric field across the piezoelectric layers to cause the device to flex, or for detecting the electrical potential produced in the device as a result of subjecting the piezoelectric element to a mechanical stress. Owing to the wound nature of the piezoelectric element, the device is relatively simple to manufacture and the conductive layers are less apt to crack or break during the manufacturing process. Also disclosed herein are techniques for producing such piezoelectric flexure devices.

Abstract: Disclosed herein is a shutter actuating mechanism for a photographic camera. The mechanism comprises a pair of spaced members adapted to be engaged by the thumb and forefinger of the camera user, and a resilient member positioned therebetween. A pinching or squeezing movement between the finger thumb and forefinger causes the spaced members to move toward each other, thereby producing a displacement of the resilient member. Such displacement of the resilient member produces a force which is used to actuate a shutter. Preferably, the spaced members, the resilient member and a plurality of coupling hinges comprise a one piece plastic structure having a constant transverse cross section, whereby the shutter actuating mechanism can be produced by conventional extrusion techniques.

Abstract: An improved racket is provided for use in tennis and the like which is believed to enable a user to hit with more power while reducing the torsional forces on the arm. The racket of the invention includes a handle having a bent or offset portion which is of such a shape that the centerline of the racket head is substantially colinear with that of the forearm of the user and thus the racket head is effectively an extension of the arm. When viewed in plan, the throat or shaft of the racket is preferably offset downwardly about 32.degree. relative to the grip or butt portion of the handle while the racket head is preferably offset upwardly about 5.degree. relative to the throat. The racket also includes an improved grip which is fit to the hand of the user.