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"Transmission of documents via telephone wires is possible in principle, but the apparatus required is so expensive that it will never become a practical proposition."
Dennis Gabor, British physicist
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| Number | Title | Issue Date |
| 5627762 | Computer implemented balancer A centrifugal balancer is combined with a computer system programed to suggest trial weights and placement and correction weights and placement to be used in interactive menu driven balancing sequences. Vibration responsive transducers provide inputs to a... | 05/06/1997 |
| 5625492 | Color compensation filter An interference filter having 17 coatings of alternating high and low index materials is located on the illumination path of an optical device and provides correction for green color distortion on the observation path and correction for blue color distort... | 04/29/1997 |
| 5621565 | Protraction device for a measuring microscope A protraction device for a measuring microscope comprises a reticle aligned on an optical path of the microscope at an intermediate image plane thereof and adapted for rotation about a central axis, and an angle encoder operably coupled to the reticle suc... | 04/15/1997 |
| 5618508 | Process for purifying exhaust gas using modified calcium hydroxide An enhanced calcium hydroxide, a process for its manufacture and a process for its use in the removal of volatile heavy metals from a gas is disclosed.... | 04/08/1997 |
| 5602640 | Lensmeter accessory A lensmeter accessory is disclosed for supporting and positioning a corneal contact lens in a light path of a lensmeter. The accessory comprises a generally planer body with a tapered slot therein having a slot wall defining a recessed groove for receivin... | 02/11/1997 |
| 5595530 | Reciprocating sander A reciprocating abrading, polisher or buffing tool is disclosed in which a counterweight for a shoe adapted for the mounting of an abrading, polishing or buffing member is driven by the shoe for oppositely directed reciprocating movement. Pairs of guides ... | 01/21/1997 |
| 5587748 | Joystick override control for an ophthalmic instrument An alignment override control for effecting automatic vertical alignment of a test axis of an ophthalmic instrument with the center of an eye is disclosed. The test axis is associated with optical alignment means of the instrument vertically movable by an... | 12/24/1996 |
| 5584884 | Mammary prosthesis and method of surgically implanting same A mammary prosthesis is disclosed as comprising a wedge shaped sheet of flexible biocompatible material having reinforced upper and lower attachment portions for attachment to bone of a patient by bone anchors, with the lower attachment portion being anch... | 12/17/1996 |
| 5585964 | Modular microscope system A modular microscope system includes a plurality of stackable housing modules each having a plurality of inwardly pointing protuberances provided with one or more precision stop surfaces thereon for removably mounting and positioning a plurality of preali... | 12/17/1996 |
| 5575456 | Lever operated hoist A lever operated tool, such as a chain hoist, is provided with a free wheel mechanism allowing a lift wheel to be selectively disconnected relative to a driving gear in response to rotations of a manual control knob. The knob controls sliding movement of ... | 11/19/1996 |
| 5576520 | Checkweigher having variable weigh platform A method and apparatus is disclosed for use in weighing products having circular or oval footprint configurations. A conveyor having a pair of parallel conveyor elements arranged to underengage the footprint only adjacent the periphery thereof transports ... | 11/19/1996 |
| 5564766 | J-hook for towing vehicles A J-hook designed for use in towing vehicles is forged of micro-alloy steel and has a T-shaped cross-section throughout a load bearing portion thereof and an enlarged tip. The disclosed J-hook is much stronger than prior art towing J-hooks without signifi... | 10/15/1996 |
| 5563108 | Raw batch for producing reaction-bonded silicon carbide refractory product This invention provides a reaction-bonded silicon carbide article having superior abrasion resistance, oxidation resistance and uniformity in which the bond phase comprises appreciable amounts of both silicon oxynitride and alumina. Also provided are a ra... | 10/08/1996 |
| 5561562 | Microscope objective with a correcting mount A microscope objective adjustable for different cover slip thicknesses includes an outer ring rotatable about an optical axis of the objective, an intermediate mount carrier having a plurality of inner lens mounts fixed thereto, and an inner correcting le... | 10/01/1996 |
| 5561555 | Microscope subassembly apparatus An apparatus and method for aligning the optical elements of a microscope are disclosed wherein a fixture is provided for locating and mounting a plurality of mirrors for reflecting an object image along an optical path to an adjacent eyepiece connected t... | 10/01/1996 |
| 5558045 | Refractory tile for open-spaced boiler tubes A refractory tile adapted for protecting boiler tubes from the corrosive and erosive effects of a hot gas stream comprises an elongated ceramic body covering only that side of a boiler tube upon which the hot gas impinges. The tile is hung on the tube wit... | 09/24/1996 |
| 5555625 | Rotary cutter A rotary cutter employs a disc blade removably mounted on a cylindrical bearing surface portion carried to upstand from adjacent one end of a handle and a swing arm movable between a retaining position in which it overlies the disc blade and a release pos... | 09/17/1996 |
| 5538040 | Pneumatic control valve A valve for controlling flow of air comprising in combination a valve housing having a chamber, inlet and outlet air flow paths communicating with the chamber adjacent oppositely facing sides thereof, and a valve seat arranged in one of the flow paths; a ... | 07/23/1996 |
| 5521755 | Epi-illumination system for microscopes An epi-illumination system for microscopes is described, which contains an epi-illumination module (18) that consists of a Smith-splitter with an integrated telescope system (14). The telescope system (14) corrects in the sense of "Shift-Optics" differenc... | 05/28/1996 |
| 5521756 | Antistatic microscope Microscopes having plastic components such as knobs, covers and eyepiece rings are rendered antistatic by using static charge dissipating plastic materials instead of conventional plastics. Such antistatic microscopes are especially useful in the manufact... | 05/28/1996 |
| 5501420 | Counterbalance mechanism A counterbalance mechanism for vertically positioning a load includes auxiliary linkage means associated with an upper end of the mechanism for carrying a load and automatically varying the vertical angular orientation of the load incident to vertical mov... | 03/26/1996 |
| 5482212 | Vehicle washing machine A vehicle washing machine is disclosed having an inverted U-shaped housing mounted for movement lengthwise of a stationary vehicle and return movement to an initial reference position during a vehicle washing cycle of the machine. The housing includes fir... | 01/09/1996 |
| 5474066 | Non-contact tonometer An improved tonometer is disclosed having a pachymetric device means for measuring a patient's corneal thickness to allow for correction of the intraocular pressure measurement where the corneal thickness measurement deviates from a calibration mean corne... | 12/12/1995 |
| 5471260 | Joystick for an ophthalmic instrument where vertical movement is controlled by rotating the joystick The disclosure relates to a joystick for positioning a test axis of an ophthalmic instrument relative to an eye of a patient. In a preferred embodiment, the joystick includes an actuator extending therefrom and arranged to alternately engage a pair of mot... | 11/28/1995 |
| 5461942 | Knife sharpener A knife sharpener is disclosed having an elongated handle and a blade sharpening unit mounted to a platform at a distal end of the handle for rotation between first and second secured positions for selective orientation of a blade draw direction to accomm... | 10/31/1995 |
| 5453829 | Procedure and device for measurement of exposure times in optical devices with microscopic illustration path A method and device for measurement of exposure times in optical devices are disclosed. Specifically, a measuring diaphragm plate and a mask plate are associated with a measurement path and a projection path of the optical device and include a plurality o... | 09/26/1995 |
| 5446274 | Instructive display for assisting in centering an optical path element on a path A polar or vector display provides an operator of an optical instrument with a symbolic instruction regarding the direction and amount of motion required to center an optical element on a chosen path.... | 08/29/1995 |
| 5434366 | Checkweigher A method and apparatus is disclosed for use in weighing products having circular or oval footprint configuration. A conveyor having a pair of parallel conveyor elements arranged to underengage the footprint only adjacent the periphery thereof transports t... | 07/18/1995 |
| 5421645 | Modular compartments for utility vehicle Cabinets are formed with a first chamber defined by end joined lengths of a first extrusion, a first chamber outer end closure and a first chamber inner end closure, which may include a second chamber defined by end joined lengths of a second extrusion ed... | 06/06/1995 |
| 5418490 | Failure responsive alternate amplifier and bypass system for communications amplifier A communications amplifier system which includes a primary preamplifier circuit, a secondary preamplifier circuit and a bypass circuit mutually exclusively selectable through a relay switching means which is automatically activated to bypass the primary p... | 05/23/1995 |
| 5411327 | Lateral file anti-tilt mechanism with pivotal activator rail A file cabinet having vertically arranged horizontally movable drawers and an anti-tip lock mechanism that permits movement of a single drawer from its closed to its opened position while simultaneously locking the remaining unopened drawers against movem... | 05/02/1995 |
| 5411386 | Random orbital sander There is disclosed in connection with a random orbital sander the utilization of improved arrangements for resiliently supporting an air motor, controlling the flow of pressurized air to the motor, and utilizing air exhausted from the motor to withdraw du... | 05/02/1995 |
| 5412583 | Computer implemented balancer A centrifugal balancer is combined with a computer system programed to suggest trial weights and placement and correction weights and placement to be used in interactive menu driven balancing sequences. Vibration responsive transducers provide inputs to a... | 05/02/1995 |
| 5410825 | Self-propelled snowthrower An improved snowthrower is disclosed having a body with a front housing containing a power driven auger continuously engaged with the ground for propelling the snowthrower forward, and a bottom scraper edge carried by a rear wall of the housing biased for... | 05/02/1995 |
| 5405286 | Flexible sanding/deburring head A flexible sanding/deburring head adapted for driven rotation by a power tool is formed from a plurality of juxtaposed thin sheets of flexible abrasive material individually die cut to define a connecting portion having a mounting opening disposed central... | 04/11/1995 |
| 5381196 | Contrast sensitivity tester A device for testing visual contrast sensitivity is disclosed whereby the contrast between a vectographically polarized test symbol and a reference background may be continuously varied by changing the direction of polarization of a polarization analyzer ... | 01/10/1995 |
| 5359889 | Vertical position aided inertial navigation system A vertical position and gravity map aided INS is self contained (no external signals required); covert (no signals emanated); unrestricted in operating area; able to operate in quiet or active gravity regions; and able to be configured with proven instrum... | 11/01/1994 |
| 5356252 | Unitized expanding dowel A unitized expanding dowel is disclosed for accurately and repeatably locating a part having a through hole relative to a reference part having a hole of like size. The dowel includes a radially expandable, resiliently deformable cylindrical sleeve having... | 10/18/1994 |
| 5355211 | Refractometer subassembly method and apparatus An apparatus and method for creating an aligned subassembly of optically critical components of a temperature compensated, hand-held refractometer prior to installing the subassembly in a refractometer housing is disclosed. The preferred embodiment is a p... | 10/11/1994 |
| 5350043 | Automatic slack adjuster An automatic slack adjuster operating to effect reduction of slack present in a vehicle brake system upon brake release incorporates a member cooperating with a slack adjusting rotor to determine a reference position for the rotor and to return the rotor ... | 09/27/1994 |
