Patent US3204045A successfully refreshed from Google Patents.
US3204045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic ring thru system
Assignee: Collins Radio Co
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Filing: 1962-10-30
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Granted: 1965-08-31
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Expires: 1982-10-30
Abstract
No abstract record available.
Inventors
- 👤 Edward G Tuthill
- 👤 Ray C Fuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:20
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/02; H04W88/022; H04W88/025; H04W88/027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
200 words
AN AUTOMATIC RING THRU SYSTEM FOR COMMUNICATION NETWORKS ACTUATED BY AN OPERATOR ON A FIRST TELEPHONE REMOTELY LOCATED FROM A COMMUNICATION CENTER FOR AUTOMATICALLY RINGING ANOTHER OPERATOR ON A SECOND REMOTELY LOCATED TELEPHONE INCLUDING: OPERATOR ACTUATED MEANS; TWO FREQUENCY SIGNAL GENERATING MEANS CONNECTED TO SAID OPERATOR ACTUATED MEANS; SIGNAL TRANSMISSION MEANS; MEANS CONNECTING SAID FIRST TELEPHONE TO SAID SIGNAL TRANSMISSION MEANS, AND MEANS CONNECTING SAID SECOND TELEPHONE TO SAID SIGNAL TRANSMISSION MEANS FOR TRANSMISSION OF MESAGES BETWEEN SAID FIRST AND SECOND TELEPHONES; A TWO FREQUENCY DIFFERENCE SIGNAL DETECTOR; SAID SIGNAL TRANSMISSION MEANS CONNECTED TO SAID TWO FREQUENCY SIGNAL GENERATING MEANS AND SAID DETECTOR, AND PROVIDING A SIGNAL PATH OF TRANSMISSION OF FREQUENCIES GENERATED BY SAID TWO FREQUENCY SIGNAL GENERATING MEANS; AND AN ATTENTION ATTRACTING DEVICE LOCATED AT SAID SECOND REMOTELY LOCATED TELEPHONE; MEANS CONNECTING SAID TWO FREQUENCY DIFFERENCE SIGNAL DETECTOR AND SAID ATTENTION ATTRACTING DEVICE FOR ACTIVATION OF THE ATTENTION ATTRACTING DEVICE WHEN A PREDETERMINED TWO FREQUENCY DIFFERENCE IS DETECTED BY THE TWO FREQUENCY DIFFERENCE SIGNAL DETECTOR; SAID SAID TWO FREQUENCY DIFFERENCE SIGNAL DETECTOR BEING PROVIDED WITH A HIGH-PASS SIGNAL INPUT FILTER HAVING A LOW THRESHOLD FREQUENCY PASSING LEVEL ABOVE THE FREQUENCY EQUAL TO THE DIFFERENCE BETWEEN THE TWO FREQUENCIES.
Claim 2
Dependent Claim
200 words
AN AUTOMATIC RING THRU SYSTEM FOR COMMUNICATION NETWORKS ACTUATED BY AN OPERATOR ON A FIRST TELEPHONE REMOTELY LOCATED FROM A COMMUNICATION CENTER FOR AUTOMATICALLY RINGING ANOTHER OPERATOR ON A SECOND REMOTELY LOCATED TELEPHONE INCLUDING: OPERATOR ACTUATED MEANS; TWO FREQUENCY SIGNAL GENERATING MEANS CONNECTED TO SAID OPERATOR ACTUATED MEANS; SIGNAL TRANSMISSION MEANS; MEANS CONNECTING SAID FIRST TELEPHONE TO SAID SIGNAL TRANSMISSION MEANS, AND MEANS CONNECTING SAID SECOND TELEPHONE TO SAID SIGNAL TRANSMISSION MEANS FOR TRANSMISSION OF MESAGES BETWEEN SAID FIRST AND SECOND TELEPHONES; A TWO FREQUENCY DIFFERENCE SIGNAL DETECTOR; SAID SIGNAL TRANSMISSION MEANS CONNECTED TO SAID TWO FREQUENCY SIGNAL GENERATING MEANS AND SAID DETECTOR, AND PROVIDING A SIGNAL PATH OF TRANSMISSION OF FREQUENCIES GENERATED BY SAID TWO FREQUENCY SIGNAL GENERATING MEANS; AND AN ATTENTION ATTRACTING DEVICE LOCATED AT SAID SECOND REMOTELY LOCATED TELEPHONE; MEANS CONNECTING SAID TWO FREQUENCY DIFFERENCE SIGNAL DETECTOR AND SAID ATTENTION ATTRACTING DEVICE FOR ACTIVATION OF THE ATTENTION ATTRACTING DEVICE WHEN A PREDETERMINED TWO FREQUENCY DIFFERENCE IS DETECTED BY THE TWO FREQUENCY DIFFERENCE SIGNAL DETECTOR; SAID SAID TWO FREQUENCY DIFFERENCE SIGNAL DETECTOR BEING PROVIDED WITH A HIGH-PASS SIGNAL INPUT FILTER HAVING A LOW THRESHOLD FREQUENCY PASSING LEVEL ABOVE THE FREQUENCY EQUAL TO THE DIFFERENCE BETWEEN THE TWO 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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |