US4541017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for contact-free measurement of electrical charge images generated by electro-radiographic recording methods
Assignee: Siemens AG
•
Filing: 1983-07-12
•
Granted: 1985-09-10
•
Expires: 2003-07-12
Abstract
Abstract An apparatus for contact-free measurement of electrical charge images of the type generated on a storage plate as transmission images by means of electro-radiographic recording methods has a matrix of dynamically functioning probes, such as Kelvin probes, for scanning the effect of the electrostatic induction caused by the image on the storage plate, the outputs of the probes being amplified and supplied to a display device such as a picture screen. The individual probes of the matrix are electrically conductive elements and a mechanical oscillation is generated between the charge image and the probes in the field to be measured either by oscillating the probes or by oscillating the storage plate. The charge amounts electrostatically induced in the probes are tapped as the image signals.
Inventors
- 👤 Ingmar Feigt
- 👤 Wolfram Wersing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:08
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/29; G01T1/2914; G01T1/2921; G01T1/2928; G03; G03G; G03G15/00; G03G15/054
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
80 words
An apparatus for contact-free measurement of an electrical charge image disposed on a surface of a recording plate of the type generated by electro-static recording methods, said apparatus comprising: a probe matrix having a plurality of discrete Kelvin probes, each probe having an electrode for reacting to the effect of electrostatic induction caused by said charge image, said electrodes respectively generating corresponding image signals for processing; and a means for inducing mechanical oscillation between said electrodes and said charge image.
Claim 2
Independent Claim
80 words
An apparatus for contact-free measurement of an electrical charge image disposed on a surface of a recording plate of the type generated by electro-static recording methods, said apparatus comprising: a probe matrix having a plurality of discrete Kelvin probes, each probe having an electrode for reacting to the effect of electrostatic induction caused by said charge image, said electrodes respectively generating corresponding image signals for processing; and a means for inducing mechanical oscillation between said electrodes and said charge image.
Claim 3
Dependent Claim
17 words
An apparatus as claimed in claim 1 wherein said means for inducing mechanical oscillation oscillates said probes.
Claim 4
Dependent Claim
34 words
An apparatus as claimed in claim 2 wherein said means for inducing mechanical oscillation comprises a plurality of piezo-electric transducers respectively connected to said electrodes and at least one drive means for said transducers.
Claim 5
Dependent Claim
16 words
An apparatus as claimed in claim 1 wherein said matrix is a row of said probes.
Claim 6
Dependent Claim
18 words
An apparatus as claimed in claim 1 wherein said probes in said probe matrix are arranged in groups.
Claim 7
Dependent Claim
25 words
An apparatus as claimed in claim 5 wherein each of the probes in said group are successively oscillated by said means for inducing mechanical oscillation.
Claim 8
Dependent Claim
23 words
An apparatus as claimed in claim 1 wherein said probe matrix is periodically moved for scanning the entire surface of said recording plate.
Claim 9
Dependent Claim
35 words
An apparatus as claimed in claim 1 wherein said means for inducing mechanical oscillation is a plurality of Piezo ceramic flexural resinators respectively connected to said electrodes for achieving oscillations up to approximately 10 kHz.
Claim 10
Dependent Claim
35 words
An apparatus as claimed in claim 1 wherein said means for inducing mechanical oscillation includes a plurality of longitudinal Piezo ceramic resinators excitable in the thickness mode for achieving oscillations up to approximately 100 kHz.
Claim 11
Dependent Claim
31 words
An apparatus as claimed in claim 1 wherein each probe has a metal surface functioning as said electrode and connected to an insulating surface and laterally surrounded by a shield grid.
Claim 12
Dependent Claim
18 words
An apparatus as claimed in claim 1 wherein said means for inducing mechanical oscillation oscillates said charge image.
Claim 13
Dependent Claim
23 words
An apparatus as claimed in claim 11 wherein said means for inducing mechanical oscillation oscillates said charge image by oscillating said recording plate.
Claim 14
Dependent Claim
25 words
An apparatus as claimed in claim 12 wherein said means for inducing mechanical oscillation is a plurality of oscillator motors connected to said recording plate.
Claim 15
Dependent Claim
29 words
An apparatus as claimed in claim 13 wherein said recording plate is substantially rectangular and wherein said oscillator motors are respectively disposed at the corners of said recording plate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-09 | 1989-03-11 | 1989-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-09 | 1993-03-11 | 1993-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-09 | 1997-03-11 | 1997-09-10 | $7700.00 | Window Closed / Lapsed |