US5040196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stack counting instrument
Assignee: Individual
•
Filing: 1988-10-20
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Granted: 1991-08-13
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Expires: 2008-10-20
Abstract
Abstract An instrument for counting the number of elements in a stack is moved over the side of the stack and an image of a portion (S) of the stack is formed on a linear photocell array(16). The photocell array is continually scanned and its electrical scan output signal is fed to a correlator which carries out an auto-correlation function while the instrument is initially stationary, and then a cross-correlation function as the instrument is moved, to furnish a time varying signal having a characteristic periodicity representing successive elements in the stack. The repeating cycles in this signal are counted to provide a count of the number of elements in the stack.
Inventors
- 👤 William H. Woodward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:02
CPC Classifications
G; G06; G06M; G06M1/00; G06M1/08; G06M1/10; G06M1/101; G06M9/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
167 words
An instrument for counting the number of elements in a stack, comprising means for scanning a side of the stack in a direction generally perpendicular to the edges of the element to provide an electrical signal, said means including a linear photocell array and an optical system for forming an image of a portion of the side of the stack onto the photocell array, said electrical signal being provided as a succession of electrical scan signals read out from said photocell array, and means for processing said electrical signal alone to determine a characteristic periodicity therein representing successive elements in the stack and for counting the repeating cycles in said electrical signal to provide a count of the number of elements in the stack, characterised in that the photocell array is disposed in the intended direction of scan and said characteristic periodicity which is determined and counted to provide said count of the number of elements in the stack is a characteristic periodicity in each scan signal.
Claim 2
Dependent Claim
167 words
An instrument for counting the number of elements in a stack, comprising means for scanning a side of the stack in a direction generally perpendicular to the edges of the element to provide an electrical signal, said means including a linear photocell array and an optical system for forming an image of a portion of the side of the stack onto the photocell array, said electrical signal being provided as a succession of electrical scan signals read out from said photocell array, and means for processing said electrical signal alone to determine a characteristic periodicity therein representing successive elements in the stack and for counting the repeating cycles in said electrical signal to provide a count of the number of elements in the stack, characterised in that the photocell array is disposed in the intended direction of scan and said characteristic periodicity which is determined and counted to provide said count of the number of elements in the stack is a characteristic periodicity in each scan signal.
Claim 3
Dependent Claim
23 words
An instrument as claimed in claim 1, in which said electrical scan signals from said photocell array are fed to a correlator device.
Claim 4
Dependent Claim
32 words
An instrument as claimed in claim 2, in which said correlator is arranged to carry out an initial auto-correlation function on each received scan signal to determine a set of master coefficients.
Claim 5
Dependent Claim
46 words
An instrument as claimed in claim 3, in which said correlator is arranged to carry out subsequently a cross-correlation function on each scan signal with the set of master coefficients to produce a time varying signal with said characteristic periodicity representing successive elements in the stack.
Claim 6
Dependent Claim
34 words
An instrument as claimed in claim 1, further comprising means to provide an incrementing count when moved in one direction relative to the stack, and a decrementing count when moved in the opposite direction.
Claim 7
Dependent Claim
19 words
An instrument as claimed in claim 1, further comprising means to determine the thickness of the panels in stack.
References Cited (Backward Citations)
US3813523A
Cited
US3835306A
Cited
US3971918A
Cited
US4225931A
Cited
US4298790A
Cited
US4324195A
Cited
US4442532A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-12 | 1995-02-11 | 1995-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-12 | 1999-02-11 | 1999-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-12 | 2003-02-11 | 2003-08-13 | $7700.00 | Window Closed / Lapsed |