Boots – shoes – and leggings
Patent
1987-09-11
1989-12-05
Williams, Jr., Archie E.
Boots, shoes, and leggings
375 36, 3649272, 3649355, 364940, 3649352, G06F 300, G06F 302, G06F 3153, H04L 2500
Patent
active
048857181
ABSTRACT:
A communications extension link for use between a computer and a keyboard and display unit has at the computer site a first interface circuit connected to it and adjacent to the keyboard and display unit a second interface circuit connected to it. The two interface circuits may then be spaced serveral hundred feet by an extension cable. The first interface circuit includes capacitors connected between keyboard data and clock lines and a positive supply terminal, and buffer amplifiers are placed in the signal lines relating to the display unit. The second interface circuit employs discrete resistors between clock and data lines and the positive supply terminal, and between the vertical sync line and logic ground. In addition, capacitance is added between the positive supply terminal and logic ground.
REFERENCES:
patent: 3657478 (1972-04-01), Andrews, Jr.
patent: 3691295 (1972-09-01), Fisk
patent: 3858010 (1974-12-01), Higashide
patent: 4303896 (1981-12-01), Slabinski
patent: 4476543 (1984-10-01), Quinones et al.
patent: 4622551 (1986-11-01), Kupersmith et al.
patent: 4630284 (1986-12-01), Cooperman
patent: 4785467 (1988-11-01), Yamada
Asprey Robert R.
Shatas Remigius G.
Cybex Corporation
Muntheanu R. Florin
Phillips C. A.
Williams Jr. Archie E.
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