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 Title: |
US4866423:
Overhead sprinkler head proximity alarm
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Anderson, II, Howard B.; Santa Clara, CA
Marks, Stephen D.; San Jose, CA
Cook, Randall W.; Palo Alto, CA
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| Assignee: |
Tandy Corporation, Fort Worth, TX
other patents from TANDY CORPORATION (560320) (approx. 133)
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| Published / Filed: |
1989-09-12
/ 1988-05-03
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| Application Number: |
US1988000189905
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| IPC Code: |
Advanced:
G08B 13/02;
H01H 3/16;
Core:
more...
IPC-7:
G08B 13/00;
H01H 3/16;
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| U.S. Class: |
Current:
340/541;
200/061.41;
Original:
340/541;
200/061.41;
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| Field of Search: |
340/541,686,51,61
200/61.41,61.93
169/023,37
180/274
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| Priority Number: |
| 1988-05-03 |
US1988000189905 |
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| Abstract: |
A proximity alarm (2) is used to protect overhead sprinkler heads (4) from damage by signaling when an object, typically carried by a forklift, comes too close to the sprinkler head. The alarm includes a signal circuit (24) mounted within a housing (22), a mounting clamp (10) and an arm (20) connecting the mounting clamp and the housing. The clamp secures the alarm to the sprinkler head adjacent the downwardly extending water pipe (8). The signal circuit includes a signal element (30), such as a horn, and a switch (26) for actuating the signal element. The switch is operated by a trigger (32) which extends downwardly from the housing. The trigger includes a portion (38, 44) positioned to contact an object coming close to the sprinkler head. Thus, when a forklift driver is lifting an object and the object contacts the trigger, the trigger actuates the switch causing the signal element to provide a signal, typically an audible alarm, warning the operator to halt movement of the load.
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| Attorney, Agent or Firm: |
Townsend and Townsend ;
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| Primary / Asst. Examiners: |
Swann, III, Glen R.; Mullen, Jr., Thomas J.
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| Maintenance Status: |
E2 Expired Check current status
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| INPADOC Legal Status: |
Show legal status actions
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| Family: |
None
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First Claim:
Show all 13 claims |
What is claimed is:
1. An overhead sprinkler head alarm, for protecting an overhead sprinkler head from mechanical damage, comprising:
- a frame including a mounting element for removably mounting the frame to a support near the sprinkler head;
- a signal circuit mounted to the frame including a signal element and a switch which, when operated, causes the signal element to be actuated; and
- trigger means, coupled to the switch, for operating the switch when an object is within a chosen region associated with the sprinkler head so as to actuate the signal element to alert a user that the object is within the chosen region;
- said trigger means and switch operable without physical contact with the object, providing the object is within the chosen region.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 20 U.S. patent(s) that reference this one
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