| 摘要 |
<p>This device mainly comprises an external probe 21 calculating the operating time of the boiler comprising, mounted in a sealed casing 8, a cam 9 which is rotationally driven by a motor, and a bimetallic strip 11 fixed by one of its ends to a spindle 12 connected to the casing and whose other end is secured to a microswitch 13 provided with a pusher 15 and a lever 14 capable of pressing on the pusher in order to close the microswitch, the bimetallic strip 11 and microswitch 13 assembly being located, with respect to the cam 9, so that the said lever 14, which moves at the same time as the bimetallic strip as a function of temperature variations, is moved away from the cam when the external temperature is raised, is in permanent contact with the cam when it is very cold outside, and is in contact for a variable time with the cam during a rotation of the latter, for intermediate external temperatures. <IMAGE></p> |
