Maximum-minimum-thermometer

Maximum-minimum thermometer with a base plate having a top end and a lower end, temperature scales arranged on said base plate, with a U-shaped capillary tube having a top end and a lower end and having two legs connected at their lower ends by a bent section containing an extension medium, a mercury filament as well as magnetically attractable display pins and having on both legs of the capillary tube parallel permanent magnetic adhesive strips for the temporary fixing of the display pins showing the maximal-minimal temperatures which can be returned to their initial position by magnets moved on the outside of said capillary tube, wherein the adhesive strips (13, 14) are arranged and secured on the front or the back of said base plate (2) behind the two legs (6, 7) of the capillary tube (5) or laterally therefrom, and in that on said base plate (2) a slide element (9) is provided which is movable along the two legs (6, 7) of the capillary tube (5) and along the temperature scale (3, 4) and overlaps them, on which at least one permanent magnet (33) is arranged with a fource which exceeds the magnetic force of the adhesive strips (13, 14) by which magnetic force the two display pins (11, 12) can be simultaneously returned by a corresponding movement of said slide element (9) from their extreme positions to their initial positions at the ends of the mercury filament (10), and wherein said slide element forms a lower end cap for covering said bent section of said U-shaped capillary tube and is movable from the bottom of the lower end of the base plate to the extreme positions of the display pins for returning said display pins to their initial positions when the lower end cap is returned to the bottom of the lower end of the base plate.