US3566042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for preventing or signalling the dialing of given telephone numbers
Assignee: Individual
•
Filing: 1967-05-04
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Granted: 1971-02-23
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Expires: 1987-05-04
Abstract
Abstract The invention refers to a device which prevents the telephones it controls from calling telephone numbers commencing with given digits, such as the digits of an area code, toll call office, etc.
Inventors
- 👤 Giorgio Pugliese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:08
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/66; H04M1/677
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
189 words
An excluding device adapted to be connected to automatic telephone equipment and which, when so connected, permits normal operation of said equipment when the first digit dialed is a permitted digit, and which disables said equipment when the first digit dialed is an excluded digit, said device comprising: a pulse counting unit having at least one selector cam disc mounted thereon: a ratchet enabling relay coacting with said pulse counting unit; a step-by-step relay to actuate said pulse counting unit; a first holding coil mounted on said ratchet enabling relay and arranged by means of its circuit to retain said ratchet enabling relay in an actuated condition until completion of the first dial pulse train; a second holding coil mounted on said step-by-step relay and adapted to block said step-by-step relay at the coMpletion of the first pulse train; and pulse damping means operatively associated with said cam disc and arranged to be inserted by said cam disc into the subscriber line connected to said telephone equipment when the first dial pulse train corresponds to an excluding digit, thereby disabling said telephone equipment during the remainder of the call.
Claim 2
Dependent Claim
189 words
An excluding device adapted to be connected to automatic telephone equipment and which, when so connected, permits normal operation of said equipment when the first digit dialed is a permitted digit, and which disables said equipment when the first digit dialed is an excluded digit, said device comprising: a pulse counting unit having at least one selector cam disc mounted thereon: a ratchet enabling relay coacting with said pulse counting unit; a step-by-step relay to actuate said pulse counting unit; a first holding coil mounted on said ratchet enabling relay and arranged by means of its circuit to retain said ratchet enabling relay in an actuated condition until completion of the first dial pulse train; a second holding coil mounted on said step-by-step relay and adapted to block said step-by-step relay at the coMpletion of the first pulse train; and pulse damping means operatively associated with said cam disc and arranged to be inserted by said cam disc into the subscriber line connected to said telephone equipment when the first dial pulse train corresponds to an excluding digit, thereby disabling said telephone equipment during the remainder of the call.
Claim 3
Dependent Claim
66 words
An excluding device according to claim 1, additionally comprising a switch arranged to connect and disconnect the device from the line between said telephone equipment and the telephone exchange, and a capacitor adapted to be inserted between a telephone line and said second holding coil to prevent said pulse counting unit from being actuated by current interruptions occurring in said lines not resulting from dial pulses.
Claim 4
Dependent Claim
30 words
An excluding device according to claim 1, wherein a capacitor is provided which is series connected with said second holding coil of the step-by-step relay and across the subscriber line.
Claim 5
Dependent Claim
41 words
An excluding device according to claim 1, wherein the armature of said step-by-step relay is provided with switch contact means adapted to control thereby the holding action of said first holding coil during the intervals of the first dial pulse train.
Claim 6
Dependent Claim
28 words
An excluding device according to claim 1, additionally comprising means permitting the operation of said device only upon actuation by the signal of a dial tone applied thereto.
Claim 7
Dependent Claim
64 words
An excluding device according to claim 1, wherein said ratchet enabling relay is provided with an armature and a pawl, and said pulse counting device is provided with a ratchet wheel, whereby in its attracted position said ratchet enabling relay lifts said pawl into engagement with said ratchet wheel, and having a switch actuated by said ratchet enabling relay simultaneously freeing the step-by-step relay.
Claim 8
Dependent Claim
133 words
An excluding device according to claim 1, wherein said pulse counting unit comprises a shaft rotatably mounted and having a return spring biasing said shaft toward its starting position, a ratchet wheel affixed to said shaft, first and second selector cam discs mounted on said shaft, said step-by-step relay being arranged to actuate by means of said first selector cam disc switch contact means arranged to produce at the end of the first dial pulse train the blocking of said step-by-step relay at the completion of the first digit when the first dial pulse train corresponds to a permissible digit, and whereby when the first dial pulse train corresponds to an excluding digit, said second selector cam disc actuates a contact switch provided therewith thereby inserting a damping resistor across said telephone line.
Claim 9
Dependent Claim
109 words
An excluding device according to claim 1, additionally comprising a capacitor and associated first switching means, and a second switching means adapted to be actuated by said selector cam disc and kept closed throughout a pulse train, whereby at any pulse interval of the first dial pulse train said capacitor is connected by said first switching means in parallel with the winding of said ratchet enabling relay which is actuated by the step-by-step relay, and whereby at each pulse said capacitor is connected in parallel to the windings of said ratchet enabling relay and of said step-by-step relay by said first switching means together with said second switching means.
Claim 10
Dependent Claim
126 words
An excluding device according to claim 1, wherein a first selector cam disc and coacting contact switch means are provided and so arranged that said first selector cam disc opens said contact switch means in the rest position and in the operation-initiating position and closes said switch contact means in the position assumed during the first dialed digit, said step-by-step relay being provided with an associated switch, whereby said ratchet enabling relay is actuated at each pulse of the first pulse train to maintain said relay energized throughout the duration of said first pulse train and thereby cause said relay to insert by means of said associated switch said second holding coil, And a capacitor connected in series with said latter coil across said telephone line.
Claim 11
Dependent Claim
45 words
An excluding device according to claim 1, wherein a contact switch means and a dial pulse damping means are provided, said damping means being connected across said telephone lines by said contact switch means upon actuation by a selector disc of said pulse counting unit.
Claim 12
Dependent Claim
37 words
An excluding device according to claim 1, additionally comprising a capacitor adapted to pass speech frequencies connected in said line in parallel with said excluding device, thereby reducing to a minimum the damping of said speech frequencies.
Claim 13
Dependent Claim
28 words
An excluding device according to claim 1, additionally comprising a resistor and a switch adapted to connect said resistor in parallel with the winding of said step-by-step relay.
Claim 14
Dependent Claim
43 words
An excluding device according to claim 1, additionally comprising a resistor connected in parallel across the winding of said step-by-step relay and adapted to control the line voltage, whereby said relay is permitted to operate only when a preselected line voltage is attained.
Claim 15
Dependent Claim
22 words
An excluding device according to claim 1, additionally comprising a tuned relay being tuned to be actuated only by dial tone frequencies.
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |