Overhead sprinkler head proximity alarm
US4866423A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 1988 |
| Grant date | Sep 12, 1989 |
| Priority date | — |
| Expiry date | May 3, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H3/16
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.