초록 ▼

In a device for monitoring the liquid level in a tank, utilizing a reed switch projecting into the tank in an internally cylindrical hollow rod and a float provided with a permanent magnet and guided on the hollow rod, the reed switch is constructed as an independent exchangeable part introducible i

In a device for monitoring the liquid level in a tank, utilizing a reed switch projecting into the tank in an internally cylindrical hollow rod and a float provided with a permanent magnet and guided on the hollow rod, the reed switch is constructed as an independent exchangeable part introducible into the hollow rod with an accurate fit and with a small assembly outlay. The slide-in part has three radially resilient abutment zones distributed uniformly around the circumference. In order to accurately introduce the slide-in part into the hollow rod, with a minimum of force, three axial guide grooves associated with the resilient abutment zones are formed radially outwards in the inner envelope surface of the hollow rod. In order to achieve the final accurate fit, the slide-in part, introduced completely into the hollow rod, is rotated until the resilient abutment zones are located in regions between the guide grooves of the hollow rod.

대표청구항 ▼

Device for monitoring a liquid level in a tank comprising: a hollow rod projecting into an inside of the tank and closed at a projecting end thereof, the hollow rod being retained in the tank at an open bottom end, a reed switch for insertion as a slide-in part into the hollow rod, the read switch i

Device for monitoring a liquid level in a tank comprising: a hollow rod projecting into an inside of the tank and closed at a projecting end thereof, the hollow rod being retained in the tank at an open bottom end, a reed switch for insertion as a slide-in part into the hollow rod, the read switch including a holder part for retaining the read switch at an interior of the hollow rod on an inner envelope surface thereof, a float guided slidably and externally on the hollow rod including a permanent magnet for cooperating with the read switch, an electrical contact terminal coupled to the reed switch for connecting the reed switch to an electrical circuit, radially formed tongues provided on an outer circumference of the holder part and angled in a circumferential direction for abutting well sections of the inner envelope surface and for centering and retaining the reed switch in the hollow rod, and bayonet fastening means for fixing the reed switch in an axial direction; wherein the tongues are arranged in pairs on the circumference of the holder part, free ends of the tongues being combined in a pair and facing each other.