Bizarre Patents
Wearable Device For Feeding and Observing Birds and Other Flying Animals
A device for feeding and observing flying animals comprising a hat, a support mounted on the hat and extending outward from the hat, and a feeder mounted on the support.
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| Number | Title | Issue Date |
| 4706047 | Frequency extended digitally generated FM A circuit for extending the frequency range of a digitally generated FM signal (f). A digital frequency generator (1) generates a precise FM waveform at a frequency up to about 50 MHz. Coupled to the FM signal (f) is a phase lock loop (53, 55, 57) compris... | 11/10/1987 |
| 4696055 | RF tuning circuit which provides image frequency rejection A radio frequency tuning circuit, for use in a transmitter or receiver, which rejects image frequencies of the frequency band of a supplied RF signal to which it is tuned. The circuit comprises an N-path filter and a feedback loop connecting the output of... | 09/22/1987 |
| 4679243 | Data transmission using a transparent tone-in band system When modems are used in SSB systems a problem arises in controlling variable data rates. If a transparent tone-in band system is used, the notch in the band transmitted will be required for a control signal for the SSB receiver. The present invention allo... | 07/07/1987 |
| 4633510 | Electronic circuit capable of stably keeping a frequency during presence of a burst In a radio communication system, a transmitting section of a substation comprises a controlling circuit (21) for controlling a carrier frequency of a local oscillator (24) in response to a frequency deviation signal. A burst generating circuit (26) genera... | 12/30/1986 |
| 4593411 | Diode mixer with bias control A diode mixer arrangement including a mixer stage connected for receiving a signal having a frequency to be converted and an oscillator signal having one of a plurality of preselectable oscillator frequencies. The mixer stage includes diodes arranged to b... | 06/03/1986 |
| 4492960 | Switching mixer An RF system is disclosed in which the input mixer of the system is also used as a switch to allow the local oscillator to be used as the transmitter oscillator. The switching mixer may also be used as an attenuator or signal modulator. A local oscillator... | 01/08/1985 |
| 4490854 | Transistor mixer for ultra-high frequency transmitters A mixer transistor of the MESFET type comprising an emitter transistor connected to the drain or source electrode of the MESFET transistor for supplying an intermediate frequency. A local oscillator signal is applied to the gate of the MESFET transistor. ... | 12/25/1984 |
| 4414686 | Compensation of nonlinearities of transmission members in a radio relay system A method for compensating nonlinearities of a transmission member in a radio relay transmission system by means of a linear converter having a linear gain characteristic and a harmonic generator converter having a nonlinear characteristic, in which an int... | 11/08/1983 |
| 4327445 | Frequency converter A frequency converter comprises a frequency converting circuit, and filters which are input and output functional with respect to the frequency converting circuit for passing input and output frequency waves respectively and which have different passing f... | 04/27/1982 |
| 4320531 | Time shared frequency conversion system A frequency conversion system, including a time shared frequency converter and a time shared band limited amplification system, whereby a plurality of information bearing signals are commonly obtained, determined, filtered and amplified over a single path... | 03/16/1982 |
| 4313223 | Signal-amplification frequency-conversion apparatus having a common active component A frequency-conversion apparatus including, among others, a single active component in common use for signal amplification and local oscillation with its operating point selected in its linear region, but not in its saturation region. With this device, th... | 01/26/1982 |
| 4293825 | Frequency-shifting systems for frequency modulated signals A system of frequency-shifting of frequency modulated signals, continuously above or below a pre-established frequency, the shift being possibly also null. The system includes a source of frequency modulated signals, the frequency of which is to be shifte... | 10/06/1981 |
| 4290145 | Circuit arrangement for compensating temperature-dependent frequency variations of a crystal-controlled oscillator A subcarrier frequency-modulated with a message signal is heterodyned with a carrier from a crystal-controlled oscillator in a mixer whose output is fed to a filter eliminating one of the resulting sidebands. In order to compensate temperature-dependent f... | 09/15/1981 |
| 4290144 | Radio communications systems A radio communications system for aircraft, particularly useful at UHF frequencies and in aircraft travelling at high speed and low level where rapid phase and amplitude fluctuations degrade intelligible speech transmission. The system comprises a transmi... | 09/15/1981 |
| 4262361 | Variable bandwidth filtering and frequency converting system A system which provides frequency conversion and continuously variable bandwidth control uses fixed filters to which opposite edges of the passband of the signal are applied in inverted frequency relationship. A channel contains the filters and three mixe... | 04/14/1981 |
| 4231116 | Radio station system In a radio station system utilizing multi-channel transmission and reception frequencies of the type comprising a transmitter and a receiver wherein the frequency difference between the transmission and reception frequencies is made to be equal to an inte... | 10/28/1980 |
| 4131850 | Single side band radio apparatus A radio transmitter, or transceiver, provides for single side band transmission. A first carrier frequency source provides a first carrier frequency (term the deleted carrier) for balanced modulation by at least one balanced modulator. The resulting side ... | 12/26/1978 |
| 4086536 | Single sideband transmitter apparatus A new single sideband transmitter is disclosed which permits use of single sideband techniques with less stringent requirements for the filters used therewith. An especially advantageous version can be constructed for a digitized discrete time system incl... | 04/25/1978 |
| 4068173 | Frequency stabilized microwave signal source The frequency of a microwave oscillator is stabilized by coupling a portion of the RF signal therefrom to an HF oscillator operating at a sub-multiple of the microwave frequency and producing a strong harmonic at the microwave frequency in order to cause ... | 01/10/1978 |
| 4052673 | Combined controlled oscillator and frequency multiplier A voltage controlled oscillator which, for example, may be utilized in a phase locked loop, includes an odd number (n) of cascaded COS-MOS inverter stages with a feedback path coupling the output of the last stage to the input of the first stage to form a... | 10/04/1977 |
| 3974460 | High frequency modulator, such as an amplitude modulator, including a frequency multiplier A high-frequency modulator circuit including a frequency multiplier comprised of a first differential amplifier for receiving a base oscillating signal and for multiplying the frequency of the base oscillating signal to thereby produce a higher frequency ... | 08/10/1976 |
