Coin examination apparatus employing an RL relaxation oscillator

Details Coin examination apparatus employing an RL relaxation oscillator Coin examination apparatus employing an RL relaxation oscillator

1981-08-21

1983-11-22

Tollberg, Stanley H.

Check-actuated control mechanisms

Including noncontacting, relatively movable parts connected...

331151, G07D 508

Patent

active

044163657

ABSTRACT:
An apparatus for coin testing including an improved inductive sensing arrangement. A coin to be tested is passed through an electromagnetic field produced by an inductor which is part of a resistor-inductor type relaxation oscillator operating at a frequency in the range of approximately 100 kHz to 1 MHz. The resulting shift in frequency of the relaxation oscillator forms the basis for testing the coin. The resistor-inductor relaxation oscillator has a linear frequency response with respect to changes in the effective inductance in the oscillator over a range of inductance suitable for testing coins and produces an output signal which is digital in nature and requires no amplitude discrimination or shaping to be suitable for counting.

REFERENCES:
patent: 4284961 (1981-08-01), Landau

Affiliated with

Also associated with

Rating

Coin examination apparatus employing an RL relaxation oscillator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Coin examination apparatus employing an RL relaxation oscillator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coin examination apparatus employing an RL relaxation oscillator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1810987