Quotables
"I watched his countenance closely, to see if he was not deranged ... and I was assured by other senators after he left the room that they had no confidence in it."
U.S. Senator Smith of Indiana ; After seeing Samuel Morse demonstrate the telegraph.
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| Number | Title | Issue Date |
| 4518839 | High frequency heating apparatus with wireless temperature probe A novel high frequency heating apparatus for detecting the internal temperature of an object contained in a heating chamber and controlling the heating thereof is disclosed, in which the temperature change of the object is picked up as a change of the res... | 05/21/1985 |
| 4481428 | Batteryless, portable, frequency divider useful as a transponder of electromagnetic radiation A batteryless, portable, frequency divider including a first LC circuit that is resonant at a first frequency for receiving electromagnetic radiation at the first frequency; a second LC circuit that is resonant at a second frequency that is one-half the f... | 11/06/1984 |
| 4475024 | Wireless food temperature-sensing assembly The present invention is directed to a cooking utensil such as a microwave oven wherein a food temperature-sensing probe is inserted into a foodstuff for detecting the internal temperature of the food. The food temperature-sensing probe includes a resonan... | 10/02/1984 |
| 4428073 | Underwater depth telemetry An acoustic telemetry system and technique are disclosed for remotely meaing the underwater depth and descent rate of a hydrographic package. Analog signals indicative of hydrostatic pressure exerted on the package and related to its underwater depth are... | 01/24/1984 |
| 4420753 | Circuit arrangement for the transmission of measurement value signals A circuit arrangement for transmitting signals from a measuring transducer via a two-wire circuit to a receiver which, in turn, via the same two-wire circuit supplies power for operating the transducer. The circuit arrangement comprises a voltage controll... | 12/13/1983 |
| 4399440 | Addressable transducer with a variable frequency oscillation for monitoring a physical quantity An addressable transducer is disclosed for use in monitoring the values of physical conditions in connection with long electric lines, such as telephone cables. Multiple transducers are connected across a single pair of transmission lines which extend fro... | 08/16/1983 |
| 4354278 | Laser telemetry A projectile carries a laser transmitter which directs its output beam to the rear through an aperture in the projectile. The beam is coded (modulated) in accordance with the start or stop of events or flight conditions being monitored by one or more tran... | 10/12/1982 |
| 4345334 | Reduced-cross talk telemetry system and method of manufacture thereof Method and apparatus for providing a multi-channel telemetry system in which the fundamental frequencies of the transmit-receive channels of the system are selected from a series of tentative fundamental frequencies. The successive fundamental frequencies... | 08/17/1982 |
| 4300125 | System for monitoring, transmitting and conditioning of information gathered at selected locations A system is provided for gathering information concerning power consumption at different locations, generating signals corresponding to this power consumption, transmitting the signals to a selected location and conditioning the signals for recording and ... | 11/10/1981 |
| 4296413 | Resistance-bridge to frequency converter with automatic offset correction A circuit for converting changes in a sensed physical parameter, such as resistance and resistance change as a function of pressure, temperature and the like, into a digital signal of proportional frequency. A sensor bridge, monitoring the parameter to be... | 10/20/1981 |
| 4281664 | Implantable telemetry transmission system for analog and digital data An improved telemetry transmission system for transmitting electrocardiographic information, indications of the occurrence of the pacing pulse and for transmitting digitally encoded information from an implanted pacemaker, an implanted drug dispensing dev... | 08/04/1981 |
| 4249418 | Temperature detector using a surface acoustic wave device A transmitting section includes an oscillator which has a surface acoustic wave device of which the frequency characteristic varies responding to the temperature of a base plate thereof, the oscillator generating an oscillation output of a frequency corre... | 02/10/1981 |
| 4238783 | Telemetry system for transmitting analog data over a telephone line An FSK receiver for a single channel analog telemetry system comprises an FSK demodulator, a frequency multiplier, and a frequency-to-voltage converter. An FSK transmitter comprises a voltage-to-frequency converter, a frequency divider, and an FSK tone ge... | 12/09/1980 |
| 4236523 | Frequency to voltage converter for cardiac communication system An accurate frequency to voltage converter for cardiac telemetry systems, in which converter charges are stored in response to selected intervals proportional to the period of an alternating input signal. Linearization of the output voltage as a function ... | 12/02/1980 |
| 4225851 | Self-calibrated subcarrier telemetry system A self-calibrating subcarrier telemetry system for measuring strain on rotating members of a turbine under operating conditions. A rotor mounted portion of the system includes a strain gage transducer bridge excited by a subcarrier alternating current der... | 09/30/1980 |
| 4160971 | Transponders A passive transponder, particularly for dental or medical applications, is described in which signals received by one or more receive resonant circuits are changed in frequency either up or down by a non-linear device coupled to one or more transmit reson... | 07/10/1979 |
| 4156194 | Frequency-shift-keyed receiver Frequency-shift-keyed signals are detected by a receiver having an input which supplies the received signals to first and second mixers. A local oscillator produces signals at a frequency midway between the two frequencies of the frequency-shift-keyed sig... | 05/22/1979 |
| 4140999 | Transformer hot spot detection system The invention is a system for the detection of hot spots, i.e., localized over-heating, in electrical power transformers and the like which utilize one or more telemetric temperature devices that are embedded at preselected locations in the windings of th... | 02/20/1979 |
| 4118977 | Electric signal transmitter for vibrating-wire sensor A force-measuring instrument of the vibrating-wire type wherein the mechanical components are located at the force-measuring location and the vibrating wire is coupled through a two-wire transmission line to electronic circuitry at a distant location. The... | 10/10/1978 |
| 4100536 | Bio-alarm security system Disclosed herein is a bio-alarm security system particularly adapted for use in banks for activating an alarm during a robbery without the need for affirmative voluntary action by an employee which might be prevented by the person committing the crime. Th... | 07/11/1978 |
| 4090176 | Telemetric measuring apparatus for biological objects Signals from a high frequency transmitter outside of the biological object are received in a resonant receiving circuit inside the object whose resonant frequency corresponds to the value of the parameter being measured. The signal from the resonant recei... | 05/16/1978 |
| 4062005 | Synchro-to-digital converter employing common processing apparatus Circuitry monitors a plurality of rotating shafts, and provides a corresponding plurality of binary output words each characterizing the angular position of an associated shaft. Synchro and Scott "T" per-shaft monitoring elements are sampled by common mul... | 12/06/1977 |
| 4011551 | Multiple data channel wireless data coupling system for transmitting measured data from a plurality of rotating sources A multiple data channel wireless data coupling system which transmits measured data from a plurality of rotating data sources to a stationary receiver. It includes several rotating transmitters, each producing a unique carrier frequency, which are capacit... | 03/08/1977 |
| 3953848 | Electrocardiograph telemetry system including method and means for indicating inoperative conditions Special circuitry in the transmitter of an electrocardiograph (ECG) telemetry system detects various malfunctions of the system and changes the transmitted signal to indicate their presence to the system receiver. When the transmitter detects that an inpu... | 04/27/1976 |
