US3937900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Long distance telephone call limiting device
Assignee: Individual
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Filing: 1974-08-27
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Granted: 1976-02-10
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Expires: 1994-08-27
Abstract
Abstract A long distance telephone call limiting device is provided which prevents the dialing of a long distance telephone number. The device comprises a stopper mounted on the dial ring at the 0 position. The stopper engages an arrangement of cams and levers when an 0 or 1 is dialed as either the first or second digits in a telephone number. The engagement prevents the further dialing of the number. The device is reset by the placement of the handset into the cradle.
Inventors
- 👤 Masayuki Nagakura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:58
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/66; H04M1/677
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
226 words
A long distance telephone call limiting device for preventing the dialing of a long distance telephone number said device comprising: a. a telephone set; b. a stopper provided on the outer periphery of the finger hole of the dial numeral 0 of a telephone dial plate; c. first, second and third rotatable cam members spaced from said dial plate; d. an arch-shaped 0-check lever means, wherein one end thereof checks said stopper and the other end thereof engages with the first cam member of said cam members; e. a rotatable sensing lever means for sensing the rotation of the dial plate said sensing lever means including a hook portion for engaging the second cam member of said cam members; f. a hook lever means for engaging the third cam member of said cam members; g. set lever means pivotably and coaxially mounted with said 0-check lever means and connected to said hook lever means; and h. a connecting rod having a plurality of hook means for engaging said set lever means, said rotation sensing lever means and said hook lever means respectively said rod moving in response to the movement of a handset on and off the telephone, wherein the dialing of an 0 or 1 in either of the first two digits of a phone number prevents the dialing of the remainder of the number.
Claim 2
Dependent Claim
226 words
A long distance telephone call limiting device for preventing the dialing of a long distance telephone number said device comprising: a. a telephone set; b. a stopper provided on the outer periphery of the finger hole of the dial numeral 0 of a telephone dial plate; c. first, second and third rotatable cam members spaced from said dial plate; d. an arch-shaped 0-check lever means, wherein one end thereof checks said stopper and the other end thereof engages with the first cam member of said cam members; e. a rotatable sensing lever means for sensing the rotation of the dial plate said sensing lever means including a hook portion for engaging the second cam member of said cam members; f. a hook lever means for engaging the third cam member of said cam members; g. set lever means pivotably and coaxially mounted with said 0-check lever means and connected to said hook lever means; and h. a connecting rod having a plurality of hook means for engaging said set lever means, said rotation sensing lever means and said hook lever means respectively said rod moving in response to the movement of a handset on and off the telephone, wherein the dialing of an 0 or 1 in either of the first two digits of a phone number prevents the dialing of the remainder of the number.
Claim 3
Dependent Claim
35 words
A long distance telephone call limiting device as claimed in claim 1 including a plurality of tension spring means coupled respectively to said check lever means, said sensing lever means, and said set lever means.
Claim 4
Dependent Claim
26 words
A long distance telephone call limiting device as claimed in claim 1 which is provided with a release means adopted to unlock the said limiting device.
Claim 5
Dependent Claim
122 words
A long distance telephone call limiting device for preventing the dialing of long distance telephone numbers said device comprising: a. a telephone set; b. stopper means mounted on the dial ring of said telephone set at the 0 position thereof; c. prevention means mounted on said telephone set, said prevention means being engaged by said stopper means upon the dialing of a 1 or 0 in either the first two digits of a telephone number, wherein said prevention means prevents the completion of the dialing of the telephone number upon said engagement with said stopper means; and d. resetting means for disengaging said stopper means and said prevention means upon the placement of the handset of said telephone in the craddle thereof.
Claim 6
Dependent Claim
122 words
A long distance telephone call limiting device for preventing the dialing of long distance telephone numbers said device comprising: a. a telephone set; b. stopper means mounted on the dial ring of said telephone set at the 0 position thereof; c. prevention means mounted on said telephone set, said prevention means being engaged by said stopper means upon the dialing of a 1 or 0 in either the first two digits of a telephone number, wherein said prevention means prevents the completion of the dialing of the telephone number upon said engagement with said stopper means; and d. resetting means for disengaging said stopper means and said prevention means upon the placement of the handset of said telephone in the craddle thereof.
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) | 1979-02-09 | 1979-08-11 | 1980-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-09 | 1983-08-11 | 1984-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-09 | 1987-08-11 | 1988-02-10 | $7700.00 | Window Closed / Lapsed |