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US3366847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Proximity switch
Assignee: Automatic Electric Laboratories Inc
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Filing: 1965-10-04
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Granted: 1968-01-30
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Expires: 1985-10-04
Abstract
No abstract record available.
Inventors
- 👤 Robert V Burns
- 👤 Robert T Cleary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:01
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/94; H03K17/945; H03K17/955
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A PROXIMITY SWITCH FOR CONTROLLING AN EXTERNAL CIRCUIT COMPRISING: SIGNAL GENERATING MEANS OPERATING AT A FIRST FREQUENCY; SWITCHING MEANS CONNECTED TO SAID EXTERNAL CIRCUIT; COUPLING MEANS TUNED TO A FREQUENCY DIFFERENT THAN SAID FIRST FREQUENCY, CONNECTED BETWEEN SAID SIGNAL GENERATING MEANS AND SAID SWITCHING MEANS; SENSING MEANS, AND SIGNAL CONVERSION MEANS CONNECTED BETWEEN SAID SENSING MEANS AND SAID COUPLING MEANS, OPERATED IN RESPONSE TO THE INTRODUCTION OF AN OBJECT ADJACENT OT SAID SENSING MEANS, TO CONVERT SIGNALS FROM SAID FIRST FREQUENCY TO SAID DIFFERENT FREQUENCY, SAID COUPLING MEANS OPERATED IN RESPONSE TO SAID DIFFERENT FREQUENCY SIGNALS TO COUPLE SAID DIFFERENT FREQUENCY SIGNALS TO SAID SWITCHING MEANS, SAID SWITCHING MEANS OPERATED IN RESPONSE TO SAID DIFFERENT FREQUENCY SIGNALS TO CONTROL SAID EXTERNAL CIRCUIT.
Claim 2
Dependent Claim
122 words
A PROXIMITY SWITCH FOR CONTROLLING AN EXTERNAL CIRCUIT COMPRISING: SIGNAL GENERATING MEANS OPERATING AT A FIRST FREQUENCY; SWITCHING MEANS CONNECTED TO SAID EXTERNAL CIRCUIT; COUPLING MEANS TUNED TO A FREQUENCY DIFFERENT THAN SAID FIRST FREQUENCY, CONNECTED BETWEEN SAID SIGNAL GENERATING MEANS AND SAID SWITCHING MEANS; SENSING MEANS, AND SIGNAL CONVERSION MEANS CONNECTED BETWEEN SAID SENSING MEANS AND SAID COUPLING MEANS, OPERATED IN RESPONSE TO THE INTRODUCTION OF AN OBJECT ADJACENT OT SAID SENSING MEANS, TO CONVERT SIGNALS FROM SAID FIRST FREQUENCY TO SAID DIFFERENT FREQUENCY, SAID COUPLING MEANS OPERATED IN RESPONSE TO SAID DIFFERENT FREQUENCY SIGNALS TO COUPLE SAID DIFFERENT FREQUENCY SIGNALS TO SAID SWITCHING MEANS, SAID SWITCHING MEANS OPERATED IN RESPONSE TO SAID DIFFERENT FREQUENCY SIGNALS TO CONTROL SAID EXTERNAL CIRCUIT.
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) | 1971-01-29 | 1971-07-31 | 1972-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-29 | 1975-07-31 | 1976-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-29 | 1979-07-31 | 1980-01-30 | $7700.00 | Window Closed / Lapsed |