Broken tine detector for agricultural machines

Details Broken tine detector for agricultural machines Broken tine detector for agricultural machines

1995-01-03

1996-05-28

Regan, Maura K.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

340679, 340684, 56 102J, G01R 2726, G08B 2100

Patent

active

055215149

ABSTRACT:
A broken tine detector for agricultural machines is provided for machines such as balers and forage harvesters. The tines form a first plate of a capacitor which rotates about the axis of a reel. The second plate of the capacitor may be provided by a back-plate which is located at the front of an agricultural machine adjacent to the ends of the tines and which is connected to machine ground. An alternate embodiment of the invention is devised by utilizing conductive strips on a tine guard. Each of the conductive strips may be utilized to form the second plate of the capacitor. The row of tines pass through individual slots in the tine guard so that a particular row in which the tine is broken may be detected. When a tine is broken the total capacitance between the tines and the back-plate will change and will be detected, and an indication will be supplied to an operator so that the operator may stop the machine and remove the tines.

REFERENCES:
patent: 4035696 (1977-07-01), Kessler
patent: 4412212 (1983-10-01), Kolegraff et al.
patent: 4415888 (1983-10-01), van der Lely
patent: 4758788 (1988-07-01), Weiss et al.
patent: 4833453 (1989-05-01), Twerdochlib
patent: 5052171 (1991-10-01), Bich et al.
patent: 5444966 (1995-08-01), Strosser

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