Title:
ADJUSTABLE HEATER FOR AQUARIA
Document Type and Number:
WIPO Patent Application WO2003094609
Kind Code:
A3
Abstract:
An adjustable heater for aquaria, comprising a substantially tubular container (2) within which are housed an electrical heating element (3), a switch (6) comprising s fixed contacts (7, 8) and moving contacts (9, 10) and capable of electrically connecting the heating element (3) with an external source (R) of electrical power, a temperature sensor (12) with a bi-metal strip (13) capable of detecting the temperature of the liquid and interacting with the switch (6) to move it from a closed position to an open position when a predetermined temperature (T) is to reached. The moving contacts (9, 10) of the switch (6) are secured to a free end (13") of the bi-metal strip (13) while the other end (13") of the bi-metal strip (13) is electrically insulated. This yields the advantage that electrical current does not pass through the bi-metal strip (13) and therefore does not create a Joule effect within it which affects the sensitivity and proper behaviour of the temperature Is sensor (12).
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Inventors:
LOLATO SAMUELE (IT)
Application Number:
PCT/IB2003/001788
Publication Date:
January 08, 2004
Filing Date:
May 07, 2003
Export Citation:
Assignee:
EDEN SRL (IT)
LOLATO SAMUELE (IT)
LOLATO SAMUELE (IT)
International Classes:
A01K63/06; (IPC1-7): A01K63/06
Foreign References:
| US3107289A | 1963-10-15 | |||
| US3890486A | 1975-06-17 | |||
| US4975562A | 1990-12-04 | |||
| US4315143A | 1982-02-09 |
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