US3854093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transceiver channel selector
Assignee: Relm Communications Inc
•
Filing: 1973-04-20
•
Granted: 1974-12-10
•
Expires: 1993-04-20
Abstract
Abstract The invention pertains to means for selecting transmit and receive frequencies in a multi-channel transceiver. The superheterodyne-type receiver includes a mixer and a crystal controlled oscillator to provide a variable frequency signal to the mixer, while the transmitter employs a separate crystal ccontrol oscillator to provide an appropriate signal to the modulator. Elements of a first bank of crystals are individually connected to the mixer oscillator by the action of two stepping switches which are alternately operable, through the action of a load switch, to forwardly bias a diode connected in series between one of the crystals and the oscillator. A mode switch grounds one side of either of the stepping switches to render it capable of biasing the diode into conduction. A second bank of crystals is selectively connected to the modulator oscillator by means of a third stepping switch which is mechanically ganged to one of the receive stepping switches. In one mode of operation, the receive stepping switch which is ganged into the transmit stepping switch is rendered operable by the mode switch so that a receive channel is automatically selected along with a particular transmit channel. In the alternate mode of operation, the receive switch, which is independently actuated, is connected to ground, thereby permitting the selection of a receive channel independently of the choice of a particular transmit channel.
Inventors
- 👤 L Schonegg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:27
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/44; H03; H03J; H03J5/00; H03J5/24; H03J5/246
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
346 words
Channel selector means for a transceiver having a transmitter including a modulator and a receiver including a frequency mixer comprising: a. a first oscillator having an output connected to the mixer, b. first frequency determining means for causing said oscillator to oscillate at one of a first plurality of selected frequencies, c. said first frequency determining means including a first plurality of frequency resonant elements, d. a second oscillator having an output connected to the modulator, e. second frequency determining means for causing said oscillator to oscillate at one of a second plurality of selected frequencies, f. said second frequency determining means including a second plurality of frequency resonant elements, g. selectively operable first selection means for selecting a particular resonant element from said first plurality of frequency resonant elements and when operable to associate said particular resonant element selected thereby with said first oscillator to determine said one of a first plurality of selected frequencies, h. selectively operable second selection means for selecting a particular resonant element from said first plurality of frequency resonant elements and when operable to associate said particular resonant element selected thereby with said first oscillator to determine said one of a first pluraLity of selected frequencies, i. third selection means for selecting a particular resonant element from said second plurality of frequency resonant elements and associating said particular resonant element selected thereby with said second oscillator to determine said one of a second plurality of selected frequencies, j. switch means for rendering said first selection means operable and said second selection means inoperable when in a first state and said second selection means operable and said first selection means inoperable when in a second state, k. means connected to said second selection means for actuating said second selection means to select a particular resonant element from said first pluraltiy of resonant elements, and l. means connected to said first and third selection means for actuating said first and third selection means in unison to select a particular resonant element from said first and second plurality of frequency resonant elements, respectively.
Claim 2
Dependent Claim
346 words
Channel selector means for a transceiver having a transmitter including a modulator and a receiver including a frequency mixer comprising: a. a first oscillator having an output connected to the mixer, b. first frequency determining means for causing said oscillator to oscillate at one of a first plurality of selected frequencies, c. said first frequency determining means including a first plurality of frequency resonant elements, d. a second oscillator having an output connected to the modulator, e. second frequency determining means for causing said oscillator to oscillate at one of a second plurality of selected frequencies, f. said second frequency determining means including a second plurality of frequency resonant elements, g. selectively operable first selection means for selecting a particular resonant element from said first plurality of frequency resonant elements and when operable to associate said particular resonant element selected thereby with said first oscillator to determine said one of a first plurality of selected frequencies, h. selectively operable second selection means for selecting a particular resonant element from said first plurality of frequency resonant elements and when operable to associate said particular resonant element selected thereby with said first oscillator to determine said one of a first pluraLity of selected frequencies, i. third selection means for selecting a particular resonant element from said second plurality of frequency resonant elements and associating said particular resonant element selected thereby with said second oscillator to determine said one of a second plurality of selected frequencies, j. switch means for rendering said first selection means operable and said second selection means inoperable when in a first state and said second selection means operable and said first selection means inoperable when in a second state, k. means connected to said second selection means for actuating said second selection means to select a particular resonant element from said first pluraltiy of resonant elements, and l. means connected to said first and third selection means for actuating said first and third selection means in unison to select a particular resonant element from said first and second plurality of frequency resonant elements, respectively.
Claim 3
Dependent Claim
346 words
Channel selector means for a transceiver having a transmitter including a modulator and a receiver including a frequency mixer comprising: a. a first oscillator having an output connected to the mixer, b. first frequency determining means for causing said oscillator to oscillate at one of a first plurality of selected frequencies, c. said first frequency determining means including a first plurality of frequency resonant elements, d. a second oscillator having an output connected to the modulator, e. second frequency determining means for causing said oscillator to oscillate at one of a second plurality of selected frequencies, f. said second frequency determining means including a second plurality of frequency resonant elements, g. selectively operable first selection means for selecting a particular resonant element from said first plurality of frequency resonant elements and when operable to associate said particular resonant element selected thereby with said first oscillator to determine said one of a first plurality of selected frequencies, h. selectively operable second selection means for selecting a particular resonant element from said first plurality of frequency resonant elements and when operable to associate said particular resonant element selected thereby with said first oscillator to determine said one of a first pluraLity of selected frequencies, i. third selection means for selecting a particular resonant element from said second plurality of frequency resonant elements and associating said particular resonant element selected thereby with said second oscillator to determine said one of a second plurality of selected frequencies, j. switch means for rendering said first selection means operable and said second selection means inoperable when in a first state and said second selection means operable and said first selection means inoperable when in a second state, k. means connected to said second selection means for actuating said second selection means to select a particular resonant element from said first pluraltiy of resonant elements, and l. means connected to said first and third selection means for actuating said first and third selection means in unison to select a particular resonant element from said first and second plurality of frequency resonant elements, respectively.
Claim 4
Dependent Claim
346 words
Channel selector means for a transceiver having a transmitter including a modulator and a receiver including a frequency mixer comprising: a. a first oscillator having an output connected to the mixer, b. first frequency determining means for causing said oscillator to oscillate at one of a first plurality of selected frequencies, c. said first frequency determining means including a first plurality of frequency resonant elements, d. a second oscillator having an output connected to the modulator, e. second frequency determining means for causing said oscillator to oscillate at one of a second plurality of selected frequencies, f. said second frequency determining means including a second plurality of frequency resonant elements, g. selectively operable first selection means for selecting a particular resonant element from said first plurality of frequency resonant elements and when operable to associate said particular resonant element selected thereby with said first oscillator to determine said one of a first plurality of selected frequencies, h. selectively operable second selection means for selecting a particular resonant element from said first plurality of frequency resonant elements and when operable to associate said particular resonant element selected thereby with said first oscillator to determine said one of a first pluraLity of selected frequencies, i. third selection means for selecting a particular resonant element from said second plurality of frequency resonant elements and associating said particular resonant element selected thereby with said second oscillator to determine said one of a second plurality of selected frequencies, j. switch means for rendering said first selection means operable and said second selection means inoperable when in a first state and said second selection means operable and said first selection means inoperable when in a second state, k. means connected to said second selection means for actuating said second selection means to select a particular resonant element from said first pluraltiy of resonant elements, and l. means connected to said first and third selection means for actuating said first and third selection means in unison to select a particular resonant element from said first and second plurality of frequency resonant elements, respectively.
Claim 5
Dependent Claim
23 words
Channel selector means as in claim 1 and wherein: a. said oscillators are crystal controlled, and b. said frequency resonant elements are crystals.
Claim 6
Dependent Claim
34 words
Channel selector means as in claim 1 and wherein: a. said first and second selection means include switch means for connecting one of said first plurality of frequency resonant elements to said first oscillator.
Claim 7
Dependent Claim
23 words
Channel selector means as in claim 3 and wherein: a. said last mentioned switch means includes diodes and means for biasing said diodes.
Claim 8
Dependent Claim
24 words
Channel selector means as in claim 4 and wherein: a. said last mentioned switch means includes means for altering the bias on said diodes.
Claim 9
Dependent Claim
70 words
Channel selector means as in claim 5 and wherein: a. said means for altering the bias on said diodes includes a plurality of circuit legs connected at one end to one electrode of said diodes, b. said first selection means and said second selection means include first contact means and second contact means, respectively, for selectively connecting the other ends of said circuit legs to said first mentioned switch means.
Claim 10
Dependent Claim
50 words
Channel selector means as in claim 6 and wherein: a. said first mentioned switch means includes means for grounding said other ends of said circuit legs either through said first contact means or said second contact means to render said first selection means or said second selection means, respectively, operable.
Claim 11
Dependent Claim
44 words
Channel selector means as in claim 7 and wherein: a. said third selection means includes switch means for connecting one of said second plurality of frequency resonant elements to said second oscillator, and b. said first and last mentioned switch means are mechanically ganged.
Claim 12
Dependent Claim
22 words
Channel selector means as in claim 3 and wherein: a. said first, second and third selection means each includes stepping switch means.
Claim 13
Dependent Claim
25 words
Channel selector means as in claim 9 and wherein: a. said stepping switch means associated with said first and third selection means are mechanically ganged.
Claim 14
Dependent Claim
19 words
Channel selector means as in claim 3 and wherein: a. said last mentioned switch means is electronic in nature.
Claim 15
Dependent Claim
208 words
Channel selector means for a transceiver including a transmitter section and a receiver section comprising: a. a first crystal controlled oscillator operatively associated with the receiver, b. a first plurality of crystals, c. first selection means for connecting one of said crystals to said oscillator operatively for frequency control, d. a second crystal controlled oscillator associated with the transmitter, e. a second plurality of crystals, f. second selection means for connecting one of said last mentioned crystals to said second oscillator for frequency control, g. said first selection means including first multiple position switch means and second multiple position switch means, h. bi-state mode switch means for alternatively rendering one of said multiple position switch means opErable to cause one of said first plurality of crystals to be connected to said first oscillator and render the other of said multiple position switch means inoperable to cause one of said first plurality of crystals to be connected to said first oscillator, i. said second selection means including third multiple position switch means for causing one of said second plurality of crystals to be connected to said second oscillator, and j. means for causing said third switch means and said first switch means to move to successive positions in unison.
Claim 16
Dependent Claim
208 words
Channel selector means for a transceiver including a transmitter section and a receiver section comprising: a. a first crystal controlled oscillator operatively associated with the receiver, b. a first plurality of crystals, c. first selection means for connecting one of said crystals to said oscillator operatively for frequency control, d. a second crystal controlled oscillator associated with the transmitter, e. a second plurality of crystals, f. second selection means for connecting one of said last mentioned crystals to said second oscillator for frequency control, g. said first selection means including first multiple position switch means and second multiple position switch means, h. bi-state mode switch means for alternatively rendering one of said multiple position switch means opErable to cause one of said first plurality of crystals to be connected to said first oscillator and render the other of said multiple position switch means inoperable to cause one of said first plurality of crystals to be connected to said first oscillator, i. said second selection means including third multiple position switch means for causing one of said second plurality of crystals to be connected to said second oscillator, and j. means for causing said third switch means and said first switch means to move to successive positions in unison.
Claim 17
Dependent Claim
119 words
Channel selection means for a multi-channel transceiver comprising: a. transmit selection means for selecting a transmit channel from a first plurality of channels, b. receive selection means for selecting a receive channel from a second plurality of channels, c. first means for actuating one of said selection means to select a channel, d. selectively operable second means for actuating the other of said selection means to select a channel, and e. said first means including selectively operable means for actuating said the other of said selection means to select a channel in unison with said one of said selection means and rendering said second means inoperable to actuate said the other of said selection means to select a channel.
Claim 18
Dependent Claim
119 words
Channel selection means for a multi-channel transceiver comprising: a. transmit selection means for selecting a transmit channel from a first plurality of channels, b. receive selection means for selecting a receive channel from a second plurality of channels, c. first means for actuating one of said selection means to select a channel, d. selectively operable second means for actuating the other of said selection means to select a channel, and e. said first means including selectively operable means for actuating said the other of said selection means to select a channel in unison with said one of said selection means and rendering said second means inoperable to actuate said the other of said selection means to select a channel.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |