US4317112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for determining the removal of work tools and/or drive elements from receiving locations, particularly for a dental treatment location
Assignee: Kaltenbach and Voigt GmbH
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Filing: 1979-10-03
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Granted: 1982-02-23
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Expires: 1999-10-03
Abstract
Abstract An arrangement for a dental treatment facility for detecting the removal of work tools and/or drive elements utilized during the operation of the work tools from receiving locations provided therefor.
Inventors
- 👤 Stefan Beier
- 👤 Hermann Gmeinder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:45
CPC Classifications
A; A61; A61C; A61C3/00; A61C3/04; A61B; A61B90/00; A61B90/08; A61B2090/0804
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
104 words
In an arrangement for detecting the removal of work tools or of drive elements utilized for driving work tools from receiving locations provided for the storage thereof in a dental treatment facility, and for delivering signals indicative of their removal, the improvement comprising: a coil associated with each receiving location, an oscillation generator connected with said coils and delivering oscillation signals, the amplitudes of which are indicative of the presence or absence of a work tool or drive element from its associated receiving location, and means for detecting the occurrence of a change in amplitude from a reference value to produce the indicator signal.
Claim 2
Dependent Claim
104 words
In an arrangement for detecting the removal of work tools or of drive elements utilized for driving work tools from receiving locations provided for the storage thereof in a dental treatment facility, and for delivering signals indicative of their removal, the improvement comprising: a coil associated with each receiving location, an oscillation generator connected with said coils and delivering oscillation signals, the amplitudes of which are indicative of the presence or absence of a work tool or drive element from its associated receiving location, and means for detecting the occurrence of a change in amplitude from a reference value to produce the indicator signal.
Claim 3
Dependent Claim
23 words
Arrangement as claimed in claim 1, including means for cyclically connecting in sequence the coils of said receiving locations with said oscillation generator.
Claim 4
Dependent Claim
48 words
Arrangement as claimed in claim 2, including two separate memory storages, means for storing the oscillation signals produced on the addressing of a single receiving location during two sequential addressing cycles in said two separate memory storages, and means for comparing the signals in said two memory storages.
Claim 5
Dependent Claim
44 words
Arrangement as claimed in claim 3, including an addressing generator for delivering addresses designating the receiving locations, a decoder, and switch means, said decoder tapping off control signals from said addresses for closing said switch means to connect said coils to said oscillation generator.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-22 | 1985-08-24 | 1986-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-22 | 1989-08-24 | 1990-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-22 | 1993-08-24 | 1994-02-23 | $7700.00 | Window Closed / Lapsed |