Submersible aquarium heater with adjustable electronic thermostatic control
US4983813A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1989 |
| Grant date | Jan 8, 1991 |
| Priority date | — |
| Expiry date | Jun 6, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01K63/065
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A submersible electric aquarium heater includes an open-ended glass tube enclosing an electric resistance heater carried by an axially disposed former. First and second bungs seal the ends of the tube. A printed circuit board carrying an adjustable electronic thermostat is positioned in the tube by first and second locators each including an annular spacer engageable with the tube and a centering post. The centering post of the first locator is insertable within the first bung, while that of the other is fixedly inserted into an end for the axially disposed former. The temperature setting of the thermostat is adjusted by a device mounted for rotation in the tube by the first bung and first locator and including a drum provided with indicia visible through the tube wall to indicate the set temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.