US4281314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selection switching apparatus
Assignee: MTI Inc A CORP OF OREGON
•
Filing: 1978-06-05
•
Granted: 1981-07-28
•
Expires: 1998-06-05
Abstract
Abstract Apparatus for selectively interconnecting different pieces of audio electrical equipment, such as an amplifier and a tuner, for the purpose of demonstrating the same to a potential purchaser. Units to be demonstrated are connected to different address-assigned ports in the apparatus, and a keyboard is operated to address the particular ports for the units desired to be connected. The apparatus includes an electronic memory which stores the addresses of the addressed ports, and which then effects a connection between such ports.
Inventors
- 👤 Theodore R. Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:31
CPC Classifications
H; H04; H04R; H04R3/00; H04R3/12; H03; H03J; H03J1/00; H03J1/06; H03J1/16; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
113 words
Electrical apparatus for selectively interconnecting different pieces of audio electrical equipment, said apparatus comprising means defining a plurality of binary-code-designated, address-assigned electrical coupling ports, each being adapted for external connection to a different piece of such equipment, means for addressing different selected pairs of said ports utilizing related binary-coded addresses, electronic memory means operatively connected to said addressing means for memorizing and storing the addresses of each such addressed pairs of ports, and selectively changeable circuit-path establishing means operatively connected both to said memory means and to said ports, operable, with said memory means storing the addresses of ports in an addressed pair of ports, to establish a circuit path coupling the same.
Claim 2
Dependent Claim
113 words
Electrical apparatus for selectively interconnecting different pieces of audio electrical equipment, said apparatus comprising means defining a plurality of binary-code-designated, address-assigned electrical coupling ports, each being adapted for external connection to a different piece of such equipment, means for addressing different selected pairs of said ports utilizing related binary-coded addresses, electronic memory means operatively connected to said addressing means for memorizing and storing the addresses of each such addressed pairs of ports, and selectively changeable circuit-path establishing means operatively connected both to said memory means and to said ports, operable, with said memory means storing the addresses of ports in an addressed pair of ports, to establish a circuit path coupling the same.
Claim 3
Dependent Claim
146 words
Electrical apparatus for selectively interconnecting different pieces of audio electrical equipment, said apparatus comprising means defining first and second sets of binarycode-designated address-assigned electrical coupling ports, each port in each set being adapted for external connection to a different piece of audio electrical equipment, addressing means operable to address different selected pairs of said ports utilizing related pairs of binary-coded addresses, with one port in each such addressed pair belonging to said first set, and the other port belonging to said second set, electronic memory means operatively connected to said addressing means for memorizing and storing the addresses of each such addressed pair of ports, and selectively changeable circuit-path establishing means operatively connected both to said memory means and to said ports, operable, with said memory means storing the addresses of ports in an addressed pair of ports, to establish a circuit path coupling the same.
Claim 4
Dependent Claim
146 words
Electrical apparatus for selectively interconnecting different pieces of audio electrical equipment, said apparatus comprising means defining first and second sets of binarycode-designated address-assigned electrical coupling ports, each port in each set being adapted for external connection to a different piece of audio electrical equipment, addressing means operable to address different selected pairs of said ports utilizing related pairs of binary-coded addresses, with one port in each such addressed pair belonging to said first set, and the other port belonging to said second set, electronic memory means operatively connected to said addressing means for memorizing and storing the addresses of each such addressed pair of ports, and selectively changeable circuit-path establishing means operatively connected both to said memory means and to said ports, operable, with said memory means storing the addresses of ports in an addressed pair of ports, to establish a circuit path coupling the same.
References Cited (Backward Citations)
US3626097A
Cited
US3688262A
Cited
US3922641A
Cited
US4024345A
Cited
US4057711A
Cited
US4176251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-27 | 1985-01-26 | 1985-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-27 | 1989-01-26 | 1989-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-27 | 1993-01-26 | 1993-07-28 | $7700.00 | Window Closed / Lapsed |