Early warning of marine cooling system failure
US4630036A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 23, 1983 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | May 23, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01P11/14
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An early warning system detects the failure of a marine cooling system by monitoring a resistance ground signal generated by a sensing element inserted into the cooling system. An alarm is given upon the detection of an increased resistance value of the resistance ground signal due to cessation or a severe reduction of water flow through the cooling system and hence contacting the sensing element. The sensing element is preferably inserted into the exhaust system portion of a marine engine cooling system and a detection circuit is connected to the sensing element. An alarm signal is generated by the detection circuit if insufficient water flow is present to maintain a low resistance value for the resistance ground signal generated by the sensing element. Such low resistance signal is maintained either by the electrical conduction of the water or the cooling effects of the water on the sensing element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.