Programmable mechanical delay line

Details Programmable mechanical delay line Programmable mechanical delay line

1988-06-14

1989-06-27

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Delay lines including long line elements

333156, 333245, H01P 900, H01P 118

Patent

active

048433551

ABSTRACT:
A programmable mechanical delay line is disclosed comprising one or more lengths of axially movable co-axial cable. The inner and outer conductors of the cable length are respectively accepted within cavities having electrically conductive inner walls. The conductors are electrically coupled to the cavity walls by respective toroidal springs which circumvent the conductors and which contact the cavity walls at their outer diameter. The minimal surface contact by the toroidal springs reduces wear and friction. The reduction in friction substantially eliminates overshoot which previously resulted from attempts to rapidly reposition the coaxial cables. Consequently, the disclosed device provided very rapid, repeatable, and accurate adjustment as different amounts of signal delay are desired.

REFERENCES:
patent: 2437067 (1948-03-01), Bingley
McAllister-"A Variable-Length Radio-Frequency Transmission-Line Section", Journal of Scientific Instruments, vol. 28, Issue-5, May 1951, pp. 142-143.

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