US3609245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for enabling an existing call to be temporarily interrupted
Assignee: International Standard Electric Corp
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Filing: 1969-05-14
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Granted: 1971-09-28
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Expires: 1989-05-14
Abstract
Abstract The circuit enables an existing call to be interrupted without being cancelled. This is of particular significance for subscribers connected via their telephone sets to a dictating machine or a teaching machine for some length of time. According to another aspect the same interruption facilities are provided for interrupting a call to another subscriber after the call has lasted a predetermined, minimum time.
Inventors
- 👤 Kurt Richter
- 👤 Horst Woller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:43
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/20; G; G09; G09B; G09B5/00; H04M11/00; H04M11/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
180 words
A circuit arrangement for telephone exchanges to enable an existing call between a first subscriber and supplementary equipment to be temporarily interrupted by a call from a second subscriber and then to be restored, comprising supplementary equipment, a junctor through which connections may be completed to the supplementary equipment, means over which a connection may be completed between a first subscriber and said junctor to permit information to be transmitted between the subscriber and the supplementary equipment, means responsive to a call from a second subscriber for determining when a first subscriber is connected to supplementary equipment and for providing a control signal indicating that the first subscriber is connected to supplementary equipment, means responsive to said control signal for coupling the second subscriber to a special inlet of the junctor connected to the supplementary equipment, means within the junctor for disconnecting the first subscriber from the supplementary equipment and for interconnecting the first subscriber and the second subscriber over the special inlet, said means within the junctor including the capacity to reconnect the first subscriber and the supplementary equipment.
Claim 2
Dependent Claim
180 words
A circuit arrangement for telephone exchanges to enable an existing call between a first subscriber and supplementary equipment to be temporarily interrupted by a call from a second subscriber and then to be restored, comprising supplementary equipment, a junctor through which connections may be completed to the supplementary equipment, means over which a connection may be completed between a first subscriber and said junctor to permit information to be transmitted between the subscriber and the supplementary equipment, means responsive to a call from a second subscriber for determining when a first subscriber is connected to supplementary equipment and for providing a control signal indicating that the first subscriber is connected to supplementary equipment, means responsive to said control signal for coupling the second subscriber to a special inlet of the junctor connected to the supplementary equipment, means within the junctor for disconnecting the first subscriber from the supplementary equipment and for interconnecting the first subscriber and the second subscriber over the special inlet, said means within the junctor including the capacity to reconnect the first subscriber and the supplementary equipment.
Claim 3
Dependent Claim
37 words
A circuit arrangement as claimed in claim 1, in which the supplementary equipment includes dictating equipments, and means are provided for performing a second identifying operation to discover which dictating equipment the first subscriber is connected to.
Claim 4
Dependent Claim
123 words
A circuit arrangement for telephone exchanges to enable an existing call between a first subscriber and supplementary equipment to be temporarily interrupted by a call from a second subscriber and then to be restored, comprising supplementary equipment, a supplementary equipment junctor for interconnecting a first subscriber and the supplementary equipment, means including a further junctor for connecting a second subscriber to a special inlet in the supplementary equipment junctor, switching means for temporarily breaking the interconnection from the first subscriber to the supplementary equipment and for connecting the first subscriber and the second subscriber to each other, and means including said last named switching means for reestablishing the interconnection between the second party and the supplementary equipment when the interrupting call has terminated.
Claim 5
Dependent Claim
123 words
A circuit arrangement for telephone exchanges to enable an existing call between a first subscriber and supplementary equipment to be temporarily interrupted by a call from a second subscriber and then to be restored, comprising supplementary equipment, a supplementary equipment junctor for interconnecting a first subscriber and the supplementary equipment, means including a further junctor for connecting a second subscriber to a special inlet in the supplementary equipment junctor, switching means for temporarily breaking the interconnection from the first subscriber to the supplementary equipment and for connecting the first subscriber and the second subscriber to each other, and means including said last named switching means for reestablishing the interconnection between the second party and the supplementary equipment when the interrupting call has terminated.
Claim 6
Dependent Claim
38 words
A circuit arrangement as claimed in claim 3, in which further means are employed to determine whether the second subscriber has authorization to interrupt existing calls, said further means limiting interruptions to calls From an authorized second subscriber.
References Cited (Backward Citations)
US3190965A
Cited
US3544725A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |