US3909773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underwater teletype communication system
Assignee: United States Department of the Navy
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Filing: 1974-06-19
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Granted: 1975-09-30
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Expires: 1994-06-19
Abstract
Abstract A diver-carried underwater communication system employs a visual read-out of transmitted and received messages. The individual message elements are selected by a keyboard control device and are stored in a memory register prior to transmission. Received signals are similarly stored in a memory register for selective display by the diver-operator. Additionally, provision is made for a read-only memory containing frequently used message elements.
Inventors
- 👤 Benjamin A Saltzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:42
CPC Classifications
H; H04; H04B; H04B11/00; Y; Y10; Y10S; Y10S367/00; Y10S367/91
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
112 words
A swimmer-carried underwater communications system comprising: a keyboard for selecting predetermined message elements; first memory register means connected to said keyboard for receipt fo said selected message elements and temporal storage thereof; display means connected to said first memory register means for visual display of said selected message elements prior to transmission; transmitter means connected to said first memory register for transmitting said predetermined message elements; receiver means positioned to receive message elements transmitted to said swimmer-carried underwater communications system; and second memory register means connected to said receiver means for receipt and temporal storage of the output thereof and connected to said display means for selectively displaying the stored contents thereof.
Claim 2
Dependent Claim
112 words
A swimmer-carried underwater communications system comprising: a keyboard for selecting predetermined message elements; first memory register means connected to said keyboard for receipt fo said selected message elements and temporal storage thereof; display means connected to said first memory register means for visual display of said selected message elements prior to transmission; transmitter means connected to said first memory register for transmitting said predetermined message elements; receiver means positioned to receive message elements transmitted to said swimmer-carried underwater communications system; and second memory register means connected to said receiver means for receipt and temporal storage of the output thereof and connected to said display means for selectively displaying the stored contents thereof.
Claim 3
Dependent Claim
30 words
A swimmer-carried underwater communication system according to claim 1 wherein said first memory register means includes a read-only memory which is connected to said keyboard to selectively recall prerecorded messages.
Claim 4
Dependent Claim
38 words
A swimmer-carried underwater communication system according to claim 1 wherein said transmitter means and said receiver means are located remotely from the remaining elements of the swimmer-carried communication system and connected thereto by means of electrical cable connection.
Claim 5
Dependent Claim
38 words
A swimmer-carried underwater communication system according to claim 2 wherein said transmitter means and said receiver means are located remotely from the remaining elements of the swimmer-carried communication system and connected thereto by means of electrical cable connection.
Claim 6
Dependent Claim
20 words
A swimmer-carried communication system according to claim 1 wherein said transmitter means and said receiver means are narrow-band acoustic devices.
Claim 7
Dependent Claim
20 words
A swimmer-carried communication system according to claim 4 wherein said transmitter means and said receiver means are narrow-band acoustic devices.
References Cited (Backward Citations)
US3786406A
Cited
US3813687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |