Back to results
US 4,437,558 AGranted
Coin detector apparatus
OwnerRaymond Nicholson, Donald O. Parkerinventors
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerRaymond Nicholson, Donald O. Parkerinventors
Estimating the term…
An electronically controlled coin tester which distinguishes between valid and invalid coins by subjecting both the token to be tested (test coin) and a fixed reference coin (sample coin) to similar magnetic fields and evaluating the quality of any null signals created by their combined output. A selectively shiftable coin holder is provided which serves to allow replacement of the sample coin as well as to provide a guiding ramp for the test coin which can be selectively set at various inclines dependant upon the size of the coins desired to be tested. The present device may optionally include a pendulum damper which will slow the movement of the test coin as its travels along the guiding ramp, and/or an antistringing device which prevents the removal of a coin from the coin box after acceptance.
In a coin tester for comparing a test coin to a sample coin, including coil assembly means for creating a magnetic field, means for locating the sample coin within the magnetic field, means for passing the test coin through the magnetic field, and means for evaluating the quality of the null created by the test coin as it passes through the magnetic field, the improvement comprising, single coin holder locating means for establishing a position for a portion of the periphery of the sample coin, means associated with the locating means and the coil assembly for relatively moving the holder and coil assembly to insert a sample coin and hold the sample coin in a predetermined position, the sample holder means having a ramp surface for guiding the test coin through the magnetic field, the angle of the ramp surface being the same as for the sample coin, thereby to cause the test coin to enter the magnetic field to the same extent as the sample coin.
Dependencies are inferred from the claim text.