Communications: electrical – Continuously variable indicating – With particular receiver
Patent
1978-07-10
1982-01-12
Groody, James J.
Communications: electrical
Continuously variable indicating
With particular receiver
73430, 318623, 318676, 324125, 324157, 346 31, G08C 2502, G01R 114, G05B 501
Patent
active
043108415
ABSTRACT:
Signal-processing apparatus for use with industrial instrumentation systems and the like, and comprising a memory to maintain a signal level for long time periods without drift. An input signal level is translated into the positioning of a movable member, through the use of an actuator motor controlled by the input signal and a position feedback signal. A friction device is coupled to the movable member to hold it in any given position, thereby to serve as a memory for the input signal level. The friction device comprises a thin vane-like element which is secured to the movable member and disposed in the air-gap of a permanent magnet. The air-gap also includes a mass of tiny magnetizable particles which, under the influence of the magnetic field, engage the surfaces of the vane-like element to develop a frictional restraining force. This frictional restraint has the characteristic of being relatively low upon initial movement away from a start point, and thereafter increasing progressively to a plateau level, thereby providing superior dynamic performance particularly in a servo positioning system. Various applications are disclosed including process controllers and chart recorder systems.
REFERENCES:
patent: 2792565 (1957-05-01), Popowsky
patent: 2855587 (1958-10-01), Macgeorge
patent: 3061824 (1962-10-01), McLemore
Groody James J.
The Foxboro Company
LandOfFree
Signal handling apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Signal handling apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal handling apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1543647