Value wheel rod lock

Details Value wheel rod lock Value wheel rod lock

1987-11-13

1988-10-11

Fuller, B. R.

Registers

Stamp

235130R, 235131FD, G06C 2500, G06F 100

Patent

active

047773537

ABSTRACT:
A value wheel rod lock is used to selectively lock value rods, mounted to a rotatable shaft of a postage meter, against axial movement according to the rotary position of the shaft. The rod lock includes a knife blade pivotally mounted to the shaft for rotation with the main shaft. The knife blade is spring biased away from engagement with the value rods. The knife blade is mounted to a cam follower which engages a circumferential cam surface surrounding the shaft. The cam surface is configured so that over a range of angular positions of the shaft the knife blade is biased against the value rods. This forces the value rods against a high friction backing pad mounted to the shaft with sufficient force to keep the value rods from being moved axially. When the shaft is at its home position, during which the meter values can be changed, the knife blade is biased away from the value rods to allow the value rods to be freely movable.

REFERENCES:
patent: 3229906 (1966-01-01), Balaz et al.
patent: 3823666 (1974-07-01), Hanson
patent: 4160899 (1979-07-01), Montagnino et al.
patent: 4644142 (1987-02-01), Payn
patent: 4656341 (1987-02-01), Payn et al.

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