Patent US4352060A successfully refreshed from Google Patents.
US4352060A
Expired / Lapsed
US
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Apparatus for measuring the interior dimensions of a cast iron mold
Assignee: VIAK AB
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Filing: 1980-07-01
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Granted: 1982-09-28
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Expires: 2000-07-01
Abstract
Abstract A device for measuring the inside dimensions of a cast iron mold includes a measuring device movably arranged inside the cast iron mold on one or several guide rails. The measuring device comprises a rim with plates, each of which forms a capacitor together with an adjacent portion of the mold wall. An electronic unit for generating and subsequently processing signals corresponding to the capacitances of the separate capacitors provides an indication of the interior dimensions of the mold, based upon the capacitance measurements.
Inventors
- 👤 Gunnar Garpendahl
- 👤 Ingrid Bruce
- 👤 Ebbe Lundmark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:35
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/02; G01R27/26; G01R27/2605; G01B; G01B7/00; G01B7/28; G01B7/287
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
170 words
Apparatus for measuring the interior dimensions of a metallic mold having a rectangular cross-section, comprising: a guide rail adapted to be disposed within a mold, said guide rail having approximately the same curvature as a mold to be measured and being adapted to be secured at along the center line of the mold to be measured; and a measuring means mounted for movement along said rail, said measuring means including: a multiplicity of plates mounted on a rim with a plurality of said plates being disposed adjacent the interior of each mold wall such that each plate forms a capacitor together with the adjacent portion of said mold wall, the plates of each wall being arranged adjacent each other parallel to the wall, and each pair of opposed plates on the rim being connected in an oscillating circuit; and signal processing means for generating and processing signals from said oscillating circuits relating to the capacitances of said capacitors, said signals being indicative of the reasonance frequencies of said oscillating circuits.
Claim 2
Dependent Claim
170 words
Apparatus for measuring the interior dimensions of a metallic mold having a rectangular cross-section, comprising: a guide rail adapted to be disposed within a mold, said guide rail having approximately the same curvature as a mold to be measured and being adapted to be secured at along the center line of the mold to be measured; and a measuring means mounted for movement along said rail, said measuring means including: a multiplicity of plates mounted on a rim with a plurality of said plates being disposed adjacent the interior of each mold wall such that each plate forms a capacitor together with the adjacent portion of said mold wall, the plates of each wall being arranged adjacent each other parallel to the wall, and each pair of opposed plates on the rim being connected in an oscillating circuit; and signal processing means for generating and processing signals from said oscillating circuits relating to the capacitances of said capacitors, said signals being indicative of the reasonance frequencies of said oscillating circuits.
Claim 3
Dependent Claim
54 words
The apparatus of claim 1 wherein said signal processing means includes a counter which is successively advanced stepwise by the signal from each one of the different oscillating circuits, and a storage device into which the contents of the counter is transferred after each complete advancement of the counter caused by an oscillating circuit.
Claim 4
Dependent Claim
60 words
The apparatus of claim 1, wherein the signal processing means includes a counter and a gate element for each pair of plates, each counter being advanced stepwise by the associated oscillating circuit when the respective gate element is enabled, and wherein said guide rails includes at least one of an optically or electronically readable marking for enabling said gate elements.
References Cited (Backward Citations)
US2177528A
Cited
US3353098A
Cited
US3400331A
Cited
US3748577A
Cited
US3867691A
Cited
US4112355A
Cited
US4168465A
Cited
DE2841600A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |