Electrical pulse counters – pulse dividers – or shift registers: c – Applications – Counting animate or inanimate entities
Patent
1985-12-18
1987-10-13
Heyman, John S.
Electrical pulse counters, pulse dividers, or shift registers: c
Applications
Counting animate or inanimate entities
377 39, 324230, 340674, 33147L, 271263, B65H 704, G01B 706, G01D 302
Patent
active
047003685
ABSTRACT:
Apparatus for sensing the passage of sheets (1) through a nip formed by rollers (5 and 6), includes means for sensing the deflection of one roller relative to the other, the sensing means including an oscillator (18) providing a train of signals the frequency of which varies with the amount of the relative deflection of the rollers, and a counter (19) counting the signals from the oscillator in a fixed time interval. Means (23) are provided for storing counts representing the relative deflections of the rollers in a cycle of movement of the rollers when no sheet is present, and for comparing the difference between a subsequent count and a stored count for a corresponding position in the cycle of rotation of the rollers, with a predetermined threshold, to establish the presence or absence of a sheet between the guide members. The sensing means may comprise a core (14), moving with the shaft of one of the rollers, and a solenoid (15) connected to the oscillator circuit.
REFERENCES:
patent: 3020473 (1962-02-01), Cauley
patent: 3219992 (1965-11-01), Stuchbery et al.
patent: 3249860 (1966-05-01), Huggins
patent: 3515555 (1970-05-01), Vachon
patent: 3826487 (1974-07-01), Forster et al.
patent: 3857095 (1974-12-01), Mitchie et al.
patent: 4068189 (1978-01-01), Wilson
patent: 4136454 (1979-01-01), Jenkins et al.
patent: 4284961 (1981-08-01), Landau
patent: 4420747 (1983-12-01), Kistner
patent: 4513430 (1985-04-01), Vora et al.
"An Improved Magnetic Reluctance Transducer for the Measurement of Thin Lubricant Film Thickness" by S. Y. Poon, Journal of Physics, vol. 3, Jul. 1970.
Munn Ernest A.
Skinner John A.
De La Rue Systems Limited
Heyman John S.
LandOfFree
Method and apparatus for sensing sheets does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for sensing sheets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for sensing sheets will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-416475