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 Title: |
US4565010:
Electronic signaling level
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Herman, Robert D.; Chicago, IL 60615
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| Assignee: |
None
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| Published / Filed: |
1986-01-21
/ 1983-05-31
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| Application Number: |
US1983000499345
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| IPC Code: |
Advanced:
G01C 9/06;
Core:
G01C 9/00;
IPC-7:
G01C 9/06;
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| U.S. Class: |
Current:
033/366.24;
033/344;
033/366.23;
033/402;
340/689;
Original:
033/366;
033/344;
033/402;
340/689;
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| Field of Search: |
033/366,402,344
340/671,678,689
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| Priority Number: |
| 1983-05-31 |
US1983000499345 |
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| Abstract: |
An angular orientation detector and indicator has a plumb bob suspended in a vertically extending chamber of a housing. A beam of radiation is emitted across the chamber from a beam emitter to a beam receiver and the plumb bob is swingable through a beam path extending between the emitter and receiver. When the housing of the detector is positioned in a preselected angular orientation the plumb bob comes to rest blocking the beam path to substantially reduce or prevent the radiated beam from being received by the receiver. An electrically actuated signal, such as an audible or visual signal, or both, is thereby actuated to indicate that the detector is at a preselected angular orientation. Such detectors may be mounted on builder's levels to indicate when the level is in a preselected angular orientation, such as a horizontal or vertical orientation. Other embodiments and useful applications of such detectors are also disclosed.
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| Attorney, Agent or Firm: |
Alexander, Unikel, Bloom, Zalewa & Tenenbaum Ltd. ;
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| Primary / Asst. Examiners: |
Martin, Jr., William D.;
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| Maintenance Status: |
E3 Expired Check current status
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Family: |
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First Claim:
Show all 19 claims |
I claim:
1. An angular orientation detector for detecting an angular orientation of an object with respect to the earth's gravitational center, said detector comprising, in combination:
- a housing having a vertically extending chamber, said chamber having a top portion;
- means for emitting a beam of radiation, said beam emitting means being positioned for emitting a beam of radiation defining one beam path extending through a portion of said chamber;
- means for receiving a beam of radiation, said beam receiving means being positioned for receiving a beam of radiation emitted along said beam path by said beam emitting means;
- plumb means freely suspended from said top portion of said chamber for being swingable across said chamber for coming to rest in a position for blocking said beam path when said detector is at a preselected angular orientation for substantially preventing said beam receiving means from receiving radiation from said beam emitting means; and
- electrically actuated means for emittiing a signal, said signal means being actuated in response to a substantial absence of radiation being received by said beam receiving means upon said plumb means blocking said beam path whereby said signal means indicates said detector is at said preselected angular orientation.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 17 U.S. patent(s) that reference this one
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