Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 5283515 | Automatic calibration system for a ramp voltage generator An automatic calibration for a ramp voltage generator includes a ramp voltage generator circuit responsive to a clock signal for providing a ramp voltage during a ramp voltage period; a comparator responsive to the ramp voltage for indicating whether the ... | 02/01/1994 |
| 5273711 | High strength and ductile depleted uranium alloy A high strength and ductile depleted uranium alloy including two or three alloying elements, two of which are molybdenum and titanium, in which the total weight percent of all of the alloying elements makes up no more than 2% of the alloy weight, in which... | 12/28/1993 |
| 5270751 | Steroscopic optical apparatus for use with television and video recording equipment Stereoscopic optical apparatus comprising a housing constructed to exclude spurious light sources, first and second optical devices having reflecting surfaces which together form a first pair of optical devices, and third and fourth optical devices having... | 12/14/1993 |
| 5270550 | Composite structure having predetermined temperature/time profiles, and method of making same A composite structure having predetermined temperature/time profiles is made by combining in chemically separate yet intimate thermal relation a plurality of phase change mediums which change phase at differing temperatures in the overall range of the pre... | 12/14/1993 |
| 5270549 | Annular cylindrical multihole collimator for a radioisotope camera and method of making same An annular cylindrical multihole collimator for a radioisotope camera made by forming a plurality of closed annular radio-opaque plates which may be all corrugated plates or may be half corrugated and half flat, each having at least one collimator segment... | 12/14/1993 |
| 5264850 | Hand-held sound digitizer system A hand-held sound digitizer system for recording sound in a personal computer, including an enclosure capable of being held in one hand, a microphone built into the enclosure for providing an analog sound signal output, and circuitry within the enclosure ... | 11/23/1993 |
| 5262983 | Ferroelectric space charge capacitor analog memory A ferroelectric space charge capacitor analog memory device includes a pair of spaced first and second electrodes; a ferroelectric dielectric disposed between the electrodes; and a signal source for applying to the dielectric a write signal equal to or gr... | 11/16/1993 |
| 5262934 | Bipolar voltage doubler circuit A charge pump circuit for providing a bipolar output that substantially doubles the unipolar voltage input by utilizing a three-phase clock signal to charge a first capacitor in response to the first phase of the three-phase clock signal, then in response... | 11/16/1993 |
| 5261007 | Frequency division, energy comparison signal processing system A frequency division, energy comparison signal processing system for detecting the presence of, and separating the contributions from, sources that compose a wide-band sound signal, in which the system divides at least part of the wide-band sound signal i... | 11/09/1993 |
| 5260957 | Quantum dot Laser A quantum dot laser includes a laser host material; a plurality of quantum dots disposed in the host material; and a pumping source for exciting and inducing a population inversion in the quantum dots.... | 11/09/1993 |
| 5256262 | System and method for electrolytic deburring An electrolytic deburring system and method employing a relatively weakly conducting electrolyte with the cathode immersed in the electrolyte in which an anodic potential is applied to the workpiece being deburred. A conductive element acting as a virtual... | 10/26/1993 |
| 5255129 | Magnetic code reader with adjustable thresholds A reader for a coded discontinuous security thread in a security document comprises a multiplicity of reading channels each coupled to at least one magnetic transducing means (11, 40) for sensing along a track across the document and including processing ... | 10/19/1993 |
| 5253054 | Frame skip encoding apparatus for moving images In a moving image encoding apparatus, an image signal is converted into a digital image signal by an A/D converter and is stored in frame memory 110. In addition, a movement vector detector 300 detects a movement of the output of the frame memory 110. In ... | 10/12/1993 |
| 5251612 | Self-aligning coupler for a laser endoscope A self-aligning coupler for a laser endoscope having a body and a lumen extending from the body includes a coupler housing; an input port adapted for connection to a laser beam source; and an output port adapted for connection to the endoscope body; a til... | 10/12/1993 |
| 5249120 | Automated manufacturing costing system and method An automated manufacturing cost estimating method and system with indirect cost allocation which identifies a material in an initial state for manufacturing a product in a final state; defines an operation for converting the material from its initial stat... | 09/28/1993 |
| 5245568 | Ferroelectric space charge capacitor memory system A ferroelectric space charge capacitor memory system includes a ferroelectric space charge capacitor memory cell having two ferroelectric space charge capacitor memory devices; a write circuit for applying coercive write voltage to each of the memory devi... | 09/14/1993 |
| 5245461 | Analog optical FM receiver An analog Optical FM Receiver which includes an optical delay for shifting the phase of a received modulated optical carrier signal as a function of the modulating analog signal so that the phase variation between the shifted optical signal and the receiv... | 09/14/1993 |
| 5241763 | Plow attachment An improved plow attachment includes a mounting plate for mounting to a front end loader bucket or other primary tool or implement; a plow blade; hinge means swingably interconnecting the plow blade and the mounting plate for enabling the plow blade to mo... | 09/07/1993 |
| 5241555 | Semiconductor single crystal external ring resonator cavity laser and gyroscope A ring laser is disclosed including a semiconductor single crystal external ring resonator cavity having a plurality of reflecting surfaces defined by the planes of the crystal and establishing a closed optical path; and a discrete laser medium disposed i... | 08/31/1993 |
| 5241468 | Apparatus and method for spectral enhancement of body-surface images to improve sensitivity of detecting subtle color features A method for spectrally-enhancing images of a body surface includes the step of increasing the Saturation values of each pixel in the image. The methods increase the sensitivity with which a human observer can detect certain reflected wavelengths. Where t... | 08/31/1993 |
| 5241401 | Image signal encoding apparatus and method for controlling quantization step size in accordance with frame skip numbers An image signal encoding apparatus having a control means for detecting a degree of redundancy of an inputted image signal and for conducting frame skip control based on a frame skip number determination and a determined skip number, an encoding processin... | 08/31/1993 |
| 5240507 | Cleaning method and system A closed circuit solvent cleaning method and system in which the object to be cleaned is placed in a chamber and subjected to a negative gauge pressure to remove air and other non-condensible gases, after which a solvent is introduced to the evacuated cha... | 08/31/1993 |
| 5240397 | Injection molding mechanism for forming a monolithic tubular pipette The invention includes a system for producing a monolithic injection molded pipette including a mold having an elongate cavity enclosing a prolate core, both cavity and core having tapered ends, paired retractable locking pins for stabilizing the core, so... | 08/31/1993 |
| 5239834 | Auxiliary outside air refrigeration system The invention pertains to an auxiliary outside air refrigeration system for use in combination with a conventional refrigeration system to supply refrigeration to an enclosure whereby cold outside air is used as the cooling medium. A differential thermost... | 08/31/1993 |
| 5238667 | Method for treating hydrated green salt A method of producing a high density, low hygroscopic green salt from hydrated green salt includes heating a charge of hydrated green salt in a nonreactive atmosphere to a first temperature above the boiling point of water to drive off free water; heating... | 08/24/1993 |
| 5237542 | Wideband, derivative-matched, continuous aperture acoustic transducer A wideband, derivative-matched, continuous aperture acoustic transducer includes a first sensor area having a predetermined spatial shading and a second sensor area having a spatial shading which is the spatial derivative of the spatial shading of the fir... | 08/17/1993 |
| 5235878 | Stud gripper socket A circumferential bead for preventing pin rollover is disposed on a retainer insert mounted in the shell of a stud gripper socket and spaced from the inner surface of the shell. The shell has at least one cam surface on its inner surface and there are rol... | 08/17/1993 |
| 5235605 | Solid state laser A wavelength-tunable, injection-seeded, dispersion-compensated, dispersively-pumped solid state laser includes a lasing medium; a highly reflective mirror; an output coupler; at least one isosceles Brewster prism oriented to the minimum deviation angle be... | 08/10/1993 |
| 5233998 | Apparatus for measuring airway resistance Apparatus for measuring airway resistance, which apparatus comprises a housing, a bore in the housing, a flow measuring device which is positioned in the bore and which is for measuring a flow of air through the bore caused by a person exhaling or inhalin... | 08/10/1993 |
| 5232573 | Integral electrophoresis gel form An integral electrophoresis gel form for placement between front and back gel plates including a pair of spaced side strips for placement between the side edges of the plates to seal the edges, and a transverse strip connected to at least one of the side ... | 08/03/1993 |
| 5231831 | Turbocharger apparatus Variable turbocharger apparatus (2) comprising a compressor housing (64), a compressor (6) mounted for rotation in the housing (64), a turbine housing (4), a turbine (12) mounted for rotation in the housing (4), a first inlet (16) for enabling air to be c... | 08/03/1993 |
| 5231380 | Input keyboard touch-sensitive adjunct A method and apparatus to augment keyboard input to a computer: the apparatus including a sensor mounted on the keyboard which is responsive to physical contact by the user's hand and which emits signals corresponding to changes in pressure and position o... | 07/27/1993 |
| 5228329 | Leak detector for fluid distribution systems serving intermittent loads A leak detector is proposed for fluid systems serving intermittent loads. The device generates a signal representative of the minimum level of flow occurring from time to time, this level of flow being taken as the rate of leakage. On the basis of this si... | 07/20/1993 |
| 5228073 | Call identification display system A call identification display system includes a reception unit; at least one remote user unit; and a communication link such as conventional interface electronics located in the reception unit and the remote units interconnected by cables or rf or laser t... | 07/13/1993 |
| 5227670 | Electronic switch with very low dynamic "on" resistance utilizing an OP-AMP An electronic switch with very low dynamic "on" resistance includes an operational transconductance amplifier including a non-inverting input adapted for connection to a reference potential and an inverting input interconnected with the amplifier output; ... | 07/13/1993 |
| 5224017 | Composite heat transfer device A composite heat transfer device is disclosed, for mounting with an object having a predetermined coefficient of thermal expansion, including a composite heat conductive member having a quantity of first and second materials; the first material having a p... | 06/29/1993 |
| 5220203 | Variable pulse width precision pulse generator A variable pulse width precision pulse generator includes a constant current source for producing a number of different constant currents; a charge storage device whose voltage output is proportional to the charge stored; and gating means responsive to an... | 06/15/1993 |
| 5219347 | Decoupled dual-beam control system A decoupled dual-beam control system for a compact micromanipulator unit for a surgical laser system includes a focusing mechanism for focusing a first laser beam of a first wavelength at a predetermined focal point; and a control mechanism for directing ... | 06/15/1993 |
| 5214920 | Turbocharger apparatus Variable turbocharger apparatus (2) comprising a housing (4), a compressor (6) mounted for rotation in the housing (4), a turbine (12) mounted for rotation in the housing (4), a first inlet (16) for enabling air to be conducted to the compressor (6), an o... | 06/01/1993 |
| 5208559 | Pulse shaping system for a pulse width modulation system A pulse shaping system for a pulse width modulation system includes: a ramp generator for generating a ramp signal having a ramp portion and a rest portion; a latch signal generator providing a latch signal coincident with the ramp portion; an indicator c... | 05/04/1993 |
