Device for the transmission over a distance of indications in pa

Details Device for the transmission over a distance of indications in pa Device for the transmission over a distance of indications in pa

1974-11-27

1976-06-08

Habecker, Thomas B.

Communications: electrical

Systems

Call station

340188R, 340191, G08C 1916

Patent

active

039626911

ABSTRACT:
A meter to be read which has indicator drums and an exterior connector and, on the other hand, a reading apparatus for making a reading of the indications of the drums detachably connected to the connector. A coding unit in the meter comprises for each drum a stepped cam connected to rotate with the corresponding drum. A movable follower is elastically biased against the stepped cam. A smooth cam driven by drive means is capable of maintaining the follower spaced away from the stepped cam outside periods in which the reading apparatus makes said reading. A device detects the movement of the follower.
The smooth cam has, in part, a camming surface whose radius increases regularly between values corresponding to the bearing of the follower on end sectors of the stepped cam. A substantially radially extending surface interconnects the maximum and minimum radius parts of the camming surface. The drive means are adapted to cause the smooth cam to effect a predetermined number of rotational steps in the direction of increasing radii of the camming surface. A counter in the reading apparatus counts the steps effected by the smooth cam when the follower cooperates with said part of the smooth cam.

REFERENCES:
patent: 2325744 (1943-08-01), Cooper
patent: 2832067 (1958-04-01), Howe

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