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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 4650155 | Anti-cavitation valve assembly The valve assembly for the control of flow of liquid from a source of liquid at high pressure to a place of use has at least one restrictive orifice adjacent a movable valve member and valve seat to provide pressure drops in series in the liquid each of w... | 03/17/1987 |
| 4646183 | Tracking head suspension for tape deck A movable support for indexing a recording head across the face of a recording tape in a deck in precision steps free of backlash and angular movement out of the normal plane of the tape and in which a pair of parallel, matched leaf springs carrying the r... | 02/24/1987 |
| 4637407 | Cigarette holder A fire safe, environmentally protective cigarette holder for fully enveloping a lit cigarette and in which an internal power source maintains a flow of air to the lit portion and drives the exhaust smoke through a filter before it is vented to the atmosph... | 01/20/1987 |
| 4629978 | Dipole antenna An antenna comprising orthogonal arrays of resistive thermocouple dipoles interconnected by transversely extending conductive elements of discrete length. The components are designed to create an additional response by a traveling wave effect on the dipol... | 12/16/1986 |
| 4628283 | Hermetically sealed oscillator with dielectric resonator tuned through dielectric window by adjusting screw Microwave dielectric resonator apparatus which, for example, may be a microwave oscillator frequency stabilized by a dielectric resonator or may be a microwave filter whose critical frequency is determined by a dielectric resonator, has the dielectric res... | 12/09/1986 |
| 4624656 | Hyperbaric gas treatment device A hyperbaric gas treatment device applicable to any part of the body for therapeutic topical treating of a skin lesion at the body part. A resilient pad is provided with a central opening therethrough in its thickness direction whose periphery at one majo... | 11/25/1986 |
| 4611166 | Radiation hazard detector An electromagnetic field detector adapted to display potential hazard to humans and other animals arising from illuminating electromagnetic energy over the frequency range determined to be hazardous by the American National Standards Institute; the detect... | 09/09/1986 |
| 4605905 | Amplifier input circuitry with compensation for pyroelectric effects A bridge circuit for use with high gain high impedance direct-current amplifiers, when the input circuitry includes components subject to pyroelectric effects. The bridge includes temperature responsive elements connected to an adjustable direct-current v... | 08/12/1986 |
| 4593218 | Directional control of permanent magnet rotors Apparatus which has a permanent magnet rotor magnetically coupled to a control field permanent magnet, the magnets being rotatable about respective rotational axes of support that are perpendicular to one another. The magnetic axis of each magnet is perpe... | 06/03/1986 |
| 4531914 | Dental device and method for gingival retraction and conditioning A dental method and apparatus for swiftly performing gingival retraction and conditioning in which a mass of moldable coherent plastic, preferably thixotropic, is lightly pressure molded both into and around the gingival trough of a prepared tooth to appl... | 07/30/1985 |
| 4484769 | Non-rigid universal coupling for health related equipment An expendable adaptor for quick coupling flexible hoses to a variety of devices such as oxygen breathing equipment and including an enlarged deformable head portion having at least a pair of concentric sleeves the inner of which is axially recessed so tha... | 11/27/1984 |
| 4431965 | Microwave radiation monitor This portable microwave radiation monitor utilizes an antenna formed in a dual Archimedean spiral. The power density of the electric field is indicated on a meter coupled to diode means connected across the inner terminals of the antenna by inductance mea... | 02/14/1984 |
| 4424483 | Microwave radiation monitor This portable microwave radiation monitor utilizes an antenna formed in a dual Archimedean spiral. The ellipse ratio of the spiral is minimized by selective placement of resistive means over a portion of the antenna and the power density of the electric f... | 01/03/1984 |
| 4422684 | Apparatus for lifting reel-less coils of wire There is disclosed a lifting feature for releasably gripping from within the reel-less cores about which coils of wire in bulk are wound, the fixture including a central lifting member from which pivotally attached lifting bars radiate to engage the core ... | 12/27/1983 |
| 4402914 | Apparatus for continuous production of emulsions A continuous throughput endless loop reactor for polymerizing monomers formed by a material conveying conduit connected in an endless loop having spaced apart raw material inlet means and polymer output means in which the output volume can be controlled b... | 09/06/1983 |
| 4377940 | Impression-resistant lock A cylinder lock wherein both cylinder and plug are radially bored to receive pin-pairs of specific design. A pin freeze element is positioned for movement within the plug in a direction substantially orthogonal to the axis of the plug bores. The interface... | 03/29/1983 |
| 4351800 | Thin layer plate chromatography apparatus There is disclosed apparatus for rapidly transferring samples for analysis by thin layer chromatography from a sample container to the chromatography plate and in which a chromatography plate is supported in a housing through which drying air, preferably ... | 09/28/1982 |
| 4340193 | Variable capacity feed reel for coiled wire A reel assembly for rapidly feeding wire from heavy coils over a range of sizes, with the coil being clamped in a basket rotatably mounted within an inwardly tapering conical shield and with wire being guided from the coil by a split annular deflector bar... | 07/20/1982 |
| 4326560 | Apparatus for injecting fluids into aggregates There is disclosed an apparatus for injecting fluids into flowing aggregates such as injecting water into a traveling dry cementitious mix in which a substantially annular fluid slot surrounds the flow path for the aggregate to establish an inwardly movin... | 04/27/1982 |
| 4303955 | Apparatus for securing and releasing tape cartridges from tape decks There is disclosed a tape deck for receiving standardized tape cartridges for data interchange in which the cartridge is accurately positioned by the combination of the forward thrust of a pair of resiliently biased pivot plates working in the notches of ... | 12/01/1981 |
| 4267005 | Heat sealing apparatus There is disclosed a radiant energy device for bonding thermoplastic films without contact between the plastic films and the radiant energy sources in the form of resistance wires heated to incandescence by pulses of current timed to occur when the plasti... | 05/12/1981 |
| 4259589 | Generation of contiguous data files of three-dimensional information The method of generating data for files containing information regarding three-dimensional surface configurations, involving selective compilation of area data through use of projected rays of differing orientation, recording of the radiation patterns pro... | 03/31/1981 |
| 4244567 | Space tumbler An exercising device for gymnasium or playground structurally designed to support an occupant in a partially reclining position. The structure is basically conical and includes a personal support area surrounded by a structure support area that is designe... | 01/13/1981 |
| 4219530 | Apparatus for analyzing biological specimens There is disclosed apparatus for automatically extracting compounds of clinical significance from a plurality of biological samples simultaneously by elution using a multi-channel system with common sources of wash reagents and eluent and common pre-progr... | 08/26/1980 |
| 4195131 | Environmentally controlled unit An environmentally controlled unit to receive specimens in standard vessels, such as petri-dishes, within a sealable chamber. Passageways are provided through and around this sealable chamber to provide a controlled flow of fluid throughout the chamber an... | 03/25/1980 |
| 4182313 | Implantable temperature probe A temperature probe that does not perturb incident electromagnetic fields which includes a high resistance thermocouple mounted within a rigid needle structure. Special leads connect the thermocouple to appropriate metering means to register the temperatu... | 01/08/1980 |
| 4172466 | Self-actuated pilot-controlled safety valve There is disclosed a self-actuated pilot-controlled pressure-responsive valve for fluid pressure systems wherein the main valve is arranged to be seated by the fluid pressure in the system and a normally balanced piston and cylinder assembly pulls the mai... | 10/30/1979 |
| 4161819 | Glass cutter A hand-operated tool for cutting sheet glass; the tool including a flat plate which near one end supports a rotatable circular cutter blade for scribbing a scored line on a glass surface, a spherical knob at an opposite end of the plate serving as a hamme... | 07/24/1979 |
| 4151452 | Synchro drive An arrangement for controlling a plurality of synchro receivers from a single command position. The system requires very little power relative to the torque produced in the controlled synchros. The desired synchro movement is achieved by selective interco... | 04/24/1979 |
| 4124978 | Compressed air engine A compressed air engine having specially designed cylinder heads and piston configurations in order to reduce friction and maximize the application of air from a pressurized air source. The disclosure includes a lubrication system whereby the mechanical p... | 11/14/1978 |
| 4076336 | Hydrostatic bearings with controlled lubricant pressure The required pumping power for hydrostatic bearings is reduced with bearings having at least two lubricating areas bounded with a narrow raised perimeter of lower clearance. The lubricant is supplied under pressure and is retained with an area which is la... | 02/28/1978 |
| 4071257 | Sulky There is disclosed a sulky in which the coupling from the rails to the forks includes a shock-absorbing frictionally loaded lost-motion coupling which allows limited relative movement between the rails and the forks to reduce shock load transfer back and ... | 01/31/1978 |
| 4023093 | Magnetic field radiation detector This is a probe for detecting the magnetic field component of low frequency electro-magnetic fields. Loop antennas utilizing thermocouples are tuned to resonate at a frequency below the lower frequency of the range being detected and a plurality of these ... | 05/10/1977 |
| 4018448 | Record for the artificial reproduction of sounds There is disclosed a rotatable record for use in the artificial reproduction of sounds, such as musical notes, tones, chords, words, voice phonemes or the like, in which there is at least one endless data track on at least part of which there is recorded ... | 04/19/1977 |
| 4006471 | Emergency exit lock system for doors A lock system controls exiting and entering of personnel, particularly in public and commercial structures by means of an alarm and a panic bar and key system to operate a lock through a series of interlocking controls including an internal panic bar, an ... | 02/01/1977 |
| 3999349 | Masonry wall construction and laminated building block units therefor A masonry wall comprising a plurality of laminated building blocks, wherein each block has an insulation layer laminated to one face. The length and breadth of the insulation layer exceed the corresponding dimensions of the block by the width of the morta... | 12/28/1976 |
| 3997946 | Method for conveying patterned pile fabrics A method of conveying pile fabrics, wherein portions of the fabric are selectively presented to the processing equipment in order to process the various portions differently. In carrying out the processing, the fabric is conveyed along a path adjacent to ... | 12/21/1976 |
| 3997947 | Method and apparatus for pile fabric finishing with a plurality of electrifier cylinders A plurality of electrifier cylinders are arranged in tandem along the conveyance path of a synthetic pile fabric. Each cylinder is provided with surface grooves in opposite directions in order to introduce a bias of different directions to the individual ... | 12/21/1976 |
| 3989291 | Controlled access slide bolt A dual function slide bolt unit operative either to secure doors or other members with a rigid slide bolt, or in a second operating mode to firmly hold the door or other member ajar by a predetermined amount. The unit comprises a bolt carriage connected t... | 11/02/1976 |
| 3982239 | Saturation drive arrangements for optically bistable displays An addressed display system using material, such as liquid crystal, light emitting diodes, ferroelectrics, fluid flow devices, electroluminiscent materials, etc., which exhibit at least two characteristic modes of operation in accordance with the electric... | 09/21/1976 |
