US3584303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Step-by-step frequency wobbled and address-coded transmission system
Assignee: Patelhold Patenverwertungs and Elektro-Holding AG
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Filing: 1969-02-11
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Granted: 1971-06-08
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Expires: 1989-02-11
Abstract
Abstract In a wobbled frequency radio transmission system of the type including synchronized transmitting and heterodyning frequency signal generators at the transmitter and receiver, respectively, the transmitting frequency is wobbled step-by-step between lower and upper limits about a discontinuous saw-tooth-shaped mean line subdivided into a plurality of successive mutually time-delayed sections comprising equal numbers of frequency steps, to effect synchronization of the receiver with the transmitter and to produce a predetermined sequency of intermediate frequency address code pulses by heterodyning of the received transmitting signal with a local oscillating searching signal being step-bystep frequency-wobbled about a continuous mean line. The address code pulses are applied to a recognition circuit which serves to produce a control signal operating a switch, to change from the local oscillating searching signal with continuous mean line to a local oscillating receiving signal having a discontinuous mean line similar to the transmitting signal, to enable transmission of a communication from said transmitting to said receiving station.
Inventors
- 👤 Gustav Guanella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:36
CPC Classifications
H; H04; H04K; H04K1/00; H04K1/003; H03; H03B; H03B2200/00; H03B2200/006; H03B2200/0092
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
261 words
A wobbled frequency radio transmission system for selectively calling and communicating with one of a plurality of addresscoded receivers, said system comprising in combination: 1. a transmitting station including: a. transmitting signal generating means having a frequency varying step-by-step from a lower to an upper limit about a discontinuous mean line comprising successive time displaced sections of equal numbers of frequency steps, the last frequency step of one section coinciding with the first frequency step of the next following section, b. each said sections having identical frequency step patterns, and 2. a receiving station including: a. first local signal generating means connected to said receiving station in its position ready to receive a call from said transmitting station, to produce a first heterodyning signal having a frequency varying step-by-step about a continuous mean line similarly to said transmitting signal, b. heterodyning means to combine the received transmitting signal with said heterodyning signal, to produce a signal of predetermined intermediate frequency by beating with a limited number of frequency steps of said transmitting signal, to result in a corresponding predetermined sequence of address code pulses depending upon said frequency step patterns, c. second local signal generating means to produce a second stepped heterodyning signal identical with said transmitting signal, d. code recognition means connected to the output of said heterodyning means, to produce an output signal upon the occurrence of said predetermined address code pulse sequence, and e. switch means operable by said output signal, to disconnect said first heterodyning signal from and to apply said second heterodyning signal to said receiver.
Claim 2
Dependent Claim
261 words
A wobbled frequency radio transmission system for selectively calling and communicating with one of a plurality of addresscoded receivers, said system comprising in combination: 1. a transmitting station including: a. transmitting signal generating means having a frequency varying step-by-step from a lower to an upper limit about a discontinuous mean line comprising successive time displaced sections of equal numbers of frequency steps, the last frequency step of one section coinciding with the first frequency step of the next following section, b. each said sections having identical frequency step patterns, and 2. a receiving station including: a. first local signal generating means connected to said receiving station in its position ready to receive a call from said transmitting station, to produce a first heterodyning signal having a frequency varying step-by-step about a continuous mean line similarly to said transmitting signal, b. heterodyning means to combine the received transmitting signal with said heterodyning signal, to produce a signal of predetermined intermediate frequency by beating with a limited number of frequency steps of said transmitting signal, to result in a corresponding predetermined sequence of address code pulses depending upon said frequency step patterns, c. second local signal generating means to produce a second stepped heterodyning signal identical with said transmitting signal, d. code recognition means connected to the output of said heterodyning means, to produce an output signal upon the occurrence of said predetermined address code pulse sequence, and e. switch means operable by said output signal, to disconnect said first heterodyning signal from and to apply said second heterodyning signal to said receiver.
Claim 3
Dependent Claim
170 words
a receiving station including: a. first local signal generating means connected to said receiving station in its position ready to receive a call from said transmitting station, to produce a first heterodyning signal having a frequency varying step-by-step about a continuous mean line similarly to said transmitting signal, b. heterodyning means to combine the received transmitting signal with said heterodyning signal, to produce a signal of predetermined intermediate frequency by beating with a limited number of frequency steps of said transmitting signal, to result in a corresponding predetermined sequence of address code pulses depending upon said frequency step patterns, c. second local signal generating means to produce a second stepped heterodyning signal identical with said transmitting signal, d. code recognition means connected to the output of said heterodyning means, to produce an output signal upon the occurrence of said predetermined address code pulse sequence, and e. switch means operable by said output signal, to disconnect said first heterodyning signal from and to apply said second heterodyning signal to said receiver.
Claim 4
Dependent Claim
170 words
a receiving station including: a. first local signal generating means connected to said receiving station in its position ready to receive a call from said transmitting station, to produce a first heterodyning signal having a frequency varying step-by-step about a continuous mean line similarly to said transmitting signal, b. heterodyning means to combine the received transmitting signal with said heterodyning signal, to produce a signal of predetermined intermediate frequency by beating with a limited number of frequency steps of said transmitting signal, to result in a corresponding predetermined sequence of address code pulses depending upon said frequency step patterns, c. second local signal generating means to produce a second stepped heterodyning signal identical with said transmitting signal, d. code recognition means connected to the output of said heterodyning means, to produce an output signal upon the occurrence of said predetermined address code pulse sequence, and e. switch means operable by said output signal, to disconnect said first heterodyning signal from and to apply said second heterodyning signal to said receiver.
Claim 5
Dependent Claim
51 words
A radio transmission system as claimed in claim 1, wherein the frequency pattern of each said sections consists of successive frequency pattern of each equal height and width, whereby to result in an address code pulSe sequence of equispaced pulses corresponding in number to the frequency pulses of each said sections.
Claim 6
Dependent Claim
42 words
A radio transmission system as claimed in claim 1, wherein the frequency pattern of each said sections consists of successive frequency steps of equal width and irregular height, whereby to result in an address code pulse sequence having unequal pulse spacing intervals.
Claim 7
Dependent Claim
40 words
A radio transmission system as claimed in claim 1, said transmitting signal generating means including means to vary said frequency step pattern, to correspond with the code recognition means of a receiving station to be called by said transmitting station.
Claim 8
Dependent Claim
30 words
A radio transmission system as claimed in claim 1, wherein the step-by-step frequency variation of said transmitting signal and said heterodyning signals are repeated periodically according to a sawtooth wave.
Claim 9
Dependent Claim
121 words
A radio transmission system as claimed in claim 1, wherein said transmitting signal and local signal generating means are comprised of a plurality of stabilized oscillators of progressively increasing carrier frequency being controlled by a ring counter-type shift register and connected to a common transmitting circuit, and wherein said code recognition means consists of a shift register controlled by the received address code pulses and a coincidence circuit having a number of inputs equal to the number of address code pulses and connected to the respective stages of said register in accordance with an assigned address code pulse series, to produce an output signal by said circuit applied to said switch means upon receipt of the predetermined address code pulse series.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |