Patent US3920927A successfully refreshed from Google Patents.
US3920927A
Expired / Lapsed
US
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Cutover transition switching apparatus and method for telephone office equipment
Assignee: North Hills Signal Processing Corp
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Filing: 1973-11-12
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Granted: 1975-11-18
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Expires: 1993-11-12
Abstract
Abstract An electrical transition switching apparatus and method for permitting transition switching of subscriber lines from earlier generation switching system units such as panel, crossbar and step-by-step to similar generation systems or to new generation systems such as the new electronic switching system units (E.S.S.), comprising cut through relay members, power distribution members and relay actuation means for selectively actuating and deactuating said relay members to thereby permit reversible connection of the subscribers lines to either of the similar generation units and the new E.S.S. units or to the earlier generation units to which they were originally connected.
Inventors
- 👤 Luca Paul V De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:15
CPC Classifications
H; H04; H04Q; H04Q3/00
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
131 words
In a telephone office the method of effecting disconnecTion of subscriber lines between a subscriber distribution frame and a switching network of the panel, crossbar or step-by-step type having a plurality of cutoff relays operatively associated therewith connected between said subscriber distribution frame and said switching network with the number of cutoff relays having a predetermined relationship with the number of telephone subscriber lines, wherein said cutoff relays having first and second states are in their first states and comprising the steps of connecting switching means in circuit with said cutoff relays without affecting the normal operation thereof, and activating said switching means to operate said cutoff relays to switch the same from their first state to their second state to thereby operatively disconnect said subscriber lines from said switching network.
Claim 2
Dependent Claim
131 words
In a telephone office the method of effecting disconnecTion of subscriber lines between a subscriber distribution frame and a switching network of the panel, crossbar or step-by-step type having a plurality of cutoff relays operatively associated therewith connected between said subscriber distribution frame and said switching network with the number of cutoff relays having a predetermined relationship with the number of telephone subscriber lines, wherein said cutoff relays having first and second states are in their first states and comprising the steps of connecting switching means in circuit with said cutoff relays without affecting the normal operation thereof, and activating said switching means to operate said cutoff relays to switch the same from their first state to their second state to thereby operatively disconnect said subscriber lines from said switching network.
Claim 3
Dependent Claim
54 words
A method in accordance with claim 1, wherein a new switching network is connected to said subscriber distribution frame and including the step of activating said new switching network with respect to said distribution frame subsequent to the activation of said switching means and the switching of said cutoff relays to their second states.
Claim 4
Dependent Claim
51 words
A method in accordance with claim 1, wherein said switching means includes a plurality of individual switches and including the steps of independently connecting each of said switches to a predetermined number of said cutoff relays, and sequentially activating said individual switches to sequentially operate said predetermined numbers of cutoff relays.
Claim 5
Dependent Claim
55 words
A method in accordance with claim 3, wherein a new switching network is connected to said subscriber distribution frame and including the step of activating said new switching network with respect to said subscriber distribution frame subsequent to the activation of said switching means and the switching of said cutoff relays to their second states.
Claim 6
Dependent Claim
40 words
A method in accordance with claim 1, including the steps of testing the operativeness of said switching means while the same is connected in circuit with said cutoff relays and prior to the activation thereof to operate said cutoff relays.
Claim 7
Dependent Claim
39 words
A method in accordance with claim 1, including the steps of selectively activating said switching means to operate said cutoff relays, and selectively deactivating said switching means after activation thereof to return said cutoff relays to their first states.
Claim 8
Dependent Claim
55 words
A method in accordance with claim 6, wherein a new switching network is connected to said subscriber distribution frame and including the steps of activating said new switching network with respect to said subscriber distribution frame subsequent to the activation of said switching means and the switching of said cutoff relays to their second states.
Claim 9
Dependent Claim
61 words
A method in accordance with claim 2, including the steps of selectively activating said switching means to operate said cutoff relays, subsequently deactivating said new switching network with respect to said subscriber distribution frame, and selectively deactivating said switching means to restore said cutoff relays to their first states, thereby operatively reconnecting said subscriber lines with said first mentioned switching network.
Claim 10
Dependent Claim
47 words
A method in accordance with claim 3, including the steps of testing the operativeness of selected ones of said plurality of individual switches while the switches are connected in circuit with said predetermined number of cutoff relays and prior to the activation thereof to operate the same.
Claim 11
Dependent Claim
24 words
A method in accordance with claim 9, wherein the operativenss of said switching means is tested without affecting the operation of said cutoff relays.
Claim 12
Dependent Claim
111 words
In a telephone office having a subscriber distribution frame and a switching network of the panel, crossbar or step-by-step type including a plurality of cutoff relays operatively associated with said operatively associated with said switching network and connected between said subscrIber distribution frame and said switching network, the number of cutoff relays having a predetermined relationship within the number of telephone subscriber lines, the improvement comprising switching means connected to circuit with each cutoff relays without affecting the normal operation thereof, and means for selectively serving said switching means to operate selected ones of said cutoff relays to thereby operatively disconnect selected ones of said subscriber lines from said switching network.
Claim 13
Dependent Claim
111 words
In a telephone office having a subscriber distribution frame and a switching network of the panel, crossbar or step-by-step type including a plurality of cutoff relays operatively associated with said operatively associated with said switching network and connected between said subscrIber distribution frame and said switching network, the number of cutoff relays having a predetermined relationship within the number of telephone subscriber lines, the improvement comprising switching means connected to circuit with each cutoff relays without affecting the normal operation thereof, and means for selectively serving said switching means to operate selected ones of said cutoff relays to thereby operatively disconnect selected ones of said subscriber lines from said switching network.
Claim 14
Dependent Claim
37 words
The improvement in accordance with claim 11, wherein said cutoff relays are in a first state, and said activating means causes said switching means to switch said cutoff relays from their first state to a second state.
Claim 15
Dependent Claim
29 words
The improvement in claim 11, wherein said switching means comprises a plurality of individual switching members, said switching members being connected to a predetermined number of said cutoff relays.
Claim 16
Dependent Claim
99 words
The improvement in accordance with claim 13, wherein said switching members comprise a plurality of individual switches, each of said individual switches having a plurality of contacts, a predetermined number of said contacts being connected in series with a corresponding number of individual cutoff relays, a source of potential, means for connecting said potential source in parallel with said series combination of said contacts and said cutoff relays, and energizing means for each of said switching members for simultaneously activating each of said individual switches thereof to simultaneously operate all of said cutoff relays connected to said individual switches.
Claim 17
Dependent Claim
21 words
The improvement in accordance with claim 14, wherein said energizing means is operative to activate all of said switching members simultaneously.
Claim 18
Dependent Claim
21 words
The improvement in accordance with claim 14, wherein said energizing means is operative to separately operate each of said switching members.
Claim 19
Dependent Claim
38 words
The improvement in accordance with claim 14, including voltage regulation means connected between said potential source and said switch members for regulating the voltage applied to said contacts of said switches and to said cutoff relays connected thereto.
Claim 20
Dependent Claim
31 words
The improvement in accordance with claim 17, including means connected between said potential source and said voltage regulation means for selecting the polarity of the potential applied to said switch members.
Claim 21
Dependent Claim
57 words
The improvement in accordance with claim 18, wherein each of said individual switching members includes a primary winding adapted to close the contacts of said individual switches upon energization thereof, means for connecting one end of said primary winding to said potential source, and means for connecting the other end of said winding to said energizing means,
Claim 22
Dependent Claim
20 words
The improvement in accordance with claim 19, including means operatively connected with said primary winding to indicate the energization thereof.
Claim 23
Dependent Claim
31 words
The improvement in accordance with claim 19, including means operatively connected with said contacts for indicating the operativeness thereof without affecting the normal operation of said contacts and said cutoff relays.
References Cited (Backward Citations)
US3562435A
Cited
US3700824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |