Patent US3740679A successfully refreshed from Google Patents.
US3740679A
Expired / Lapsed
US
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Broadcast channel selecting mechanism having motor operated rotary member
Assignee: KAPARU KK
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Filing: 1971-11-29
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Granted: 1973-06-19
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Expires: 1991-11-29
Abstract
Abstract A broadcast channel selecting mechanism for all-channel tuning means, arranged so that, in order to make tuning circuits for the respective receivable channels as the circuit of the applied signals to a variable capacity element is switched by a changeover means, the mechanism is provided with a rotary member rotated by a motor and interlocked with the changeover means and having individual different channel positions established thereon for every different rotational angle assumed by the changeover means, and also provided with selected channel position limiting members which are pre-set to those selected ones of the channels in such a way that only in these pre-set positions, the rotation of the rotary member is automatically halted so that any desired channel can be selected.
Inventors
- 👤 S Kimura
- 👤 Y Aoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:46
CPC Classifications
H; H03; H03J; H03J5/00; H03J5/02; H03J5/14; H03J5/16; H03J5/0209
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
337 words
A broadcast channel selecting mechanism of tuning means comprising: a variable capacity element contained in a resonant circuit and capable of varying its capacity in accordance with an applied signal, a plurality of signal level setting means connected to said variable capacity element and capable of applying signals of various different levels to said variable capacity element predetermined in accordance with independently selected channels changeover means associated with said signal level setting means and said variable capacity element and capable of switching the connection between said variable capacity element and the signal level setting means to selectively apply said signals to said variable capacity element, a rotary means connected to said changeover means for operating said changeover means in accordance with its rotary angle, a motor connected to said rotary means and controlled of its rotation in accordance with the make and break of its switch channel position limiting means on said rotary means at positions corresponding to positions of receivable channels among the positions of all channels provided at spaced intervals for every constant rotational angle of said rotary means, an electromagnet provided adjacent to said channel position limiting means and having a pole-contacting means engageable with said limiting means self-holding means associated with said pole-contacting means for holding said pole-contacting means at a position in which said pole-contacting means is attracted to said electromagnet, and a release means provided adjacent to said rotary means and entering into the path of movement of said selected channel position limiting means and being adapted to be shifted in its position immediately before said rotary means is halted by the action of said pole-contacting means applied to the rotating rotary means to thereby set said self-holding means free, said pole-contacting means being adapted to actuate said selfholding means and also to close the motor switch whenever said pole-contacting means is attracted to said electromagnet, and being adapted to depart away from said electromagnet and to halt the rotation of said rotary means upon the releasing of said self-holding means.
Claim 2
Dependent Claim
337 words
A broadcast channel selecting mechanism of tuning means comprising: a variable capacity element contained in a resonant circuit and capable of varying its capacity in accordance with an applied signal, a plurality of signal level setting means connected to said variable capacity element and capable of applying signals of various different levels to said variable capacity element predetermined in accordance with independently selected channels changeover means associated with said signal level setting means and said variable capacity element and capable of switching the connection between said variable capacity element and the signal level setting means to selectively apply said signals to said variable capacity element, a rotary means connected to said changeover means for operating said changeover means in accordance with its rotary angle, a motor connected to said rotary means and controlled of its rotation in accordance with the make and break of its switch channel position limiting means on said rotary means at positions corresponding to positions of receivable channels among the positions of all channels provided at spaced intervals for every constant rotational angle of said rotary means, an electromagnet provided adjacent to said channel position limiting means and having a pole-contacting means engageable with said limiting means self-holding means associated with said pole-contacting means for holding said pole-contacting means at a position in which said pole-contacting means is attracted to said electromagnet, and a release means provided adjacent to said rotary means and entering into the path of movement of said selected channel position limiting means and being adapted to be shifted in its position immediately before said rotary means is halted by the action of said pole-contacting means applied to the rotating rotary means to thereby set said self-holding means free, said pole-contacting means being adapted to actuate said selfholding means and also to close the motor switch whenever said pole-contacting means is attracted to said electromagnet, and being adapted to depart away from said electromagnet and to halt the rotation of said rotary means upon the releasing of said self-holding means.
Claim 3
Dependent Claim
44 words
A broadcast channel selecting mechanism of tuning means according to claim 1, in which said mechanism further comprises an indicating means interlocked with said motor and driven in synchronism with said rotary means to digitally indicate the respective receivable channel numbers of all channels.
Claim 4
Dependent Claim
33 words
A broadcast channel selecting mechanism of tuning means according to claim 1, in which said variable capacity element is a variable capacity diode capable of varying its capacity by the applied signal voltages.
Claim 5
Dependent Claim
32 words
A broadcast channel selecting mechanism of tuning means according to claim 1, in which said changeover means is a mechanism for switching the connection of contacts and comprises slidable brushes and contacts.
Claim 6
Dependent Claim
56 words
A broadcast channel selecting mechanism of tuning means according to claim 1, in which said changeover means are electric means adapted to detect the rotational angular position of said rotary means by virtue of a magnetic induction mechanism containing a magnetic head and adapted to changeover the sWitching circuit connection by virtue of the detected signals.
Claim 7
Dependent Claim
39 words
A broadcast channel selecting mechanism of tuning means according to claim 1, in which said selected channel position limiting means are pins protruding onto the face of said rotary means acting upon said release means at the selected position.
Claim 8
Dependent Claim
71 words
A broadcast channel selecting mechanism of tuning means according to claim 6, in which said pins are provided so as to be able to protrude and retreat with respect to said face and have notches formed at two positions and are capable of being held semi-fixedly at either of their protruding and retreating positions by the engagement of an elastic member located in the rotary means with either of the notches.
Claim 9
Dependent Claim
49 words
A broadcast channel selecting mechanism of tuning means according to claim 1, in which said indicating means is a group of leaves each carrying a numerical figure to be indicated and being turned over one at a time for said every constant rotational angle assumed by said rotary means.
Claim 10
Dependent Claim
29 words
A broadcast channel selecting mechanism of tuning means according to claim 1, in which said selected channel position limiting means comprises pins and notches provided on said rotary means.
Claim 11
Dependent Claim
31 words
A broadcast channel selecting mechanism of tuning means according to claim 1, in which said mechanism further comprises a remote control switch connected in parallel with said manually operable switch means.
Claim 12
Dependent Claim
34 words
A broadcast channel selecting mechanism of tuning means according to claim 1, in which said self-holding means is a switch means connected in parallel with the manually operable switch means of said electromagnet circuit.
Claim 13
Dependent Claim
42 words
A broadcast channel selecting mechanism of tuning means according to claim 1, in which said self-holding means is a lever adapted to mechanically engage said pole-contacting means of the electromagnet at its attracted position to hold said pole-contacting means at this position.
Claim 14
Dependent Claim
286 words
A broadcast channel selecting mechanism of tuning means according to claim 1, in which said rotary means includes a disk and pins having a length greater than the thickness of the disk and they are arranged so that when the pins are in a first position, they protrude onto one side of said disk to assume the re-setting position and that when the pins are in a second position, they protrude onto the other side of said disk to assume the position of a selected channel; and said mechanism further comprises a normally opened first auxiliary switch of the motor for connecting the motor to a power source; a re-setting lever having a tapered portion operative so that, during a first operation, this tapered portion enters into the path of movement of said pins assuming their first position to cause these pins lying in their first position to move towards their second position one after another, and also having a working portion for closing said auxiliary switch of the motor; a pre-setting lever having a striking portion operative so that, during said second operation, it acts to move the pins assuming their first position towards their second position one after another; a second auxiliary switch of the motor connected in series with said motor switch and arranged so that this serially connected portion is connected in parallel with said first auxiliary switch of the motor; and an electromagnetic switch connected in parallel with said manually operable switch means and operative so that, during each of said first and said second operation, said second auxiliary switch of the motor is opened and said electromagnetic switch itself is closed interlockingly with the opening of said second auxiliary switch.
References Cited (Backward Citations)
US3679980A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |