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| Number | Title | Issue Date |
| 4280196 | Correction of zero drift, gain drift, and distortion errors in analog storage devices A system is provided in which an analog storage device stores, delays, and/or changes the time scale of an input analog waveform. The system provides an output which is corrected for the gain and offset of the analog storage device by exercising the syste... | 07/21/1981 |
| 4280197 | Multiple access store A multiple access store having bipolar monolithic memory cells. Each cell includes a memory flip-flop comprised of cross-connected NPN transistors. A single concurrent read and write for each cell is achieved by a pair of accessing transistors, one access... | 07/21/1981 |
| 4280198 | Method and circuit arrangement for controlling an integrated semiconductor memory In integrated semiconductor memory cell arrangements, particularly integrated semiconductor memory cell arrangements using merged transistor logic configurations, line capacitances are discharged before accessing to reduce access time and power consumptio... | 07/21/1981 |
| 4280199 | Apparatus for scanning an addressable memory Apparatus for scanning an addressable memory includes a clock pulse generator and an address counter for counting the clock pulses so as to produce an address for the addressable memory and thereby designate a corresponding storage location from which sto... | 07/21/1981 |
| 4280200 | Seismic method of mapping horizontal fractures in the earth A seismic method for mapping horizontal fractures in the earth resulting from the application of fluid pressure, at a selected point, at a selected depth, in the earth, comprising the steps of creating a seismic wave in the earth over the expected positio... | 07/21/1981 |
| 4280201 | Variable gap roll along switching A seismic prospecting roll along switching system using a relatively small number of switches to provide roll along prospecting while also providing variable gapping with minimum loss of active channels. In a simple form two sets of switches are provided ... | 07/21/1981 |
| 4280202 | Digital homodyne processing system A digital homodyne processing system is disclosed and includes a hydrophone, a preamplifier for amplifying the hydrophone output signal, a heterodyne circuit and a low-pass filter for filtering the amplified hydrophone output, and a digital-to-analog conv... | 07/21/1981 |
| 4280203 | Sonar beam forming utilizing the chirp Z-transform The chirp rate in a chirp Z-transform sonar beam former is varied as a function of range to form beams in the near field. The chirp rate may be varied with each range cell under examination or with each group of range cells.... | 07/21/1981 |
| 4280204 | Mobility cane for the blind incorporating ultrasonic obstacle sensing apparatus A conventional mobility cane for the blind incorporates a compact, dual-mode, ultrasonic obstacle detection sensor that includes a combination transmitting and receiving, capacitance type electrostatic transducer. The size of the protective zone associate... | 07/21/1981 |
| 4280205 | Ultrasonic fork height measuring apparatus The height to which the forks of a lift truck are raised is measured by an ultrasonic height measuring arrangement including a downward facing transmitting transducer, positioned on the truck platform in fixed position with respect to the forks, and a dow... | 07/21/1981 |
| 4280206 | Seismometers A vertical seismometer comprises a horizontal boom 2 carrying a mass 1 frictionlessly pivoted about a horizontal axis 3. The boom is supported by a pre-stressed vertically extending flat spring 4 having one end rigidly attached to the boom adjacent to and... | 07/21/1981 |
| 4280207 | Electronic timepiece and digital display therefor An electronic timepiece including circuitry for automatically indexing the time counted thereby to represent the time at a different time zone, and a digital display that displays the particular time zone to which the time displayed by the timepiece has b... | 07/21/1981 |
| 4280208 | Electronic timepiece An electronic timepiece having a battery lifetime detection mechanism is provided with a control circuit and external operation member the suitable manipulation of which permits a battery lifetime warning indication, produced in response to a signal from ... | 07/21/1981 |
| 4280209 | Electronic alarm clock An electronic timepiece having an analog time display and a digital alarm setting system for actuating an alarm at a preset time. The timepiece includes a high-frequency time base whose output is applied to a frequency converter yielding low frequency tim... | 07/21/1981 |
| 4280210 | Electronic alarm timepiece An electronic alarm timepiece comprises a quartz crystal oscillator, a frequency divider, a display driving means, a display means, an alarm signal shaping means and an alarm means. The alarm signal shaping means is so arranged that a pair of output signa... | 07/21/1981 |
| 4280211 | Clock apparatus A novel clock apparatus is provided which visually indicates attained time of day by the continuously changing placement order of accumulated spheroids as viewed at rest through framed outlined alignment within window-like apertures, respectively, the ape... | 07/21/1981 |
| 4280212 | Multiplexing system for a solid state timing device A CMOS timing device having a primary oscillatory reference source, a chain of series connected bistable divider stages whose data outputs are applied to a decoder/display by way of a multiplexing network. The multiplexing network is comprised of a plural... | 07/21/1981 |
| 4280213 | Quick feeding system for a counter A quick feeding system for feeding quick counting pulses to a counter, such as an hours counter of an electronic clock of the digital display type, comprising frequency dividing circuits, a switch for effecting a quick feed of pulses to the counter and a ... | 07/21/1981 |
| 4280214 | Wrist watch A wrist watch having healthful and remedical effects. The wrist watch is composed of a digital watch body and a watch band which is attached to the watch body, and at least one of the watch body and watch band is magnetized. The magnetization is done by m... | 07/21/1981 |
| 4280215 | Focussing lens servo driving device for optical information reading device A focussing lens servo driving device for an optical information reading device in which the lens is first driven towards the focussed position with a controlling servo circuit operated in an open loop mode. Once the lens has passed a predetermined positi... | 07/21/1981 |
| 4280216 | Method of making conference call connections in a multiplex switching system A method for making connections for conference calls in a PCM time division multiplex switching system incorporates the steps of adding, during each pulse frame, code words received from subscribers to each conference call, and storing code words represen... | 07/21/1981 |
| 4280217 | Time division switching system control arrangement A time division switching system having distributed control processors is disclosed. The distributed processors exchange control messages and cooperate in the completion of talking paths between subscribers. Each control message includes an address portio... | 07/21/1981 |
| 4280218 | False alarm processor Improved acquisition of signals in a Gaussian noise environment is achieved by applying the output of a correlator (14) to a threshold detector (12). A correlation pulse output from the threshold detector (12) and the output of the correlator (14) are inp... | 07/21/1981 |
| 4280219 | Digital memory system A digital memory system adapted to store samples of a received radio frequency signal and enable retransmission of a radio frequency signal from such stored samples, such retransmitted radio frequency signal having a frequency related to the frequency of ... | 07/21/1981 |
| 4280220 | Electronic testing system An electronic system for testing an electronic device responsive to a data clock signal and to a serial input data signal synchronous with the data clock signal comprises an oscillator for generating oscillator pulses, a data clock signal generator respon... | 07/21/1981 |
