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 Title: |
US3601621:
PROXIMITY CONTROL APPARATUS
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| Country: |
US United States of America
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| Inventor: |
Ritchie, Edwin E.; , WA
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| Assignee: |
None
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| Published / Filed: |
1971-08-24
/ 1969-08-18
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| Application Number: |
US1969000850967
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| IPC Code: |
Advanced:
H03K 17/723;
H03K 17/725;
H03K 17/95;
H03K 17/955;
Core:
H03K 17/94;
more...
IPC-7:
H01H 35/00;
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| U.S. Class: |
Current:
307/116;
219/518;
331/065;
392/411;
Original:
307/116.000;
331/065;
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| Field of Search: |
141/156-162
307/116,117,118,119
331/065,66
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| Priority Number: |
| 1969-08-18 |
US1969000850967 |
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| Abstract: |
An electronic control responsive to the presence of an object in predetermined proximity to the probe thereof. The probe is connected to an oscillation generator which supplies electrical oscillations to a circuit which controls the initiation of the timing cycle of a timing device when an object is brought into proximity of the probe and electrical oscillations supplied by the generator are interrupted. The timing device supplies a signal to a control circuit after a predetermined timed interval to shut off the load circuit which was activated when the timing cycle was started.
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| Attorney, Agent or Firm: |
Allen and Chromy ;
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| Primary / Asst. Examiners: |
Schaefer, Robert K.; Hohauser, H. J.
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| Family: |
None
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First Claim:
Show all 6 claims |
While I have shown and described certain preferred embodiment of the invention, it is apparent that the invention is capable of variation and modification from the form shown so that the scope thereof should be limited only by the proper scope of the claims appended hereto.
1. In an electronic control responsive to the presence of an object in predetermined proximity, the combination of an oscillation generator, a probe connected to said oscillation generator to interrupt the generation of oscillations when an object is placed in proximity thereto, a control circuit for controlling a work circuit, means responsive to the interruption of said oscillation generator activating said control circuit, said last mentioned means includes a first rectifier having a gate electrode which is connected to be fired when said oscillation generator is producing oscillations, said control circuit including a second rectifier having a gate which is connected to be fired when said first rectifier is turned off by the interruption of said oscillation generator, said second rectifier being turned off when said object is removed from the proximity of said probe.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
Show drawing descriptions
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| Description: |
Show description
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| Forward References: |
Show 53 U.S. patent(s) that reference this one
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