SU68895A1 - Probe to control the moisture of the molding ground in casting molds - Google Patents

Description

To control the moisture of various materials, it is known to use probes stuck into the material under study and supplied with electrodes of various materials: these electrodes, when introduced into the material under study, form a galvanic cell with moisture in this material, the voltage of which depends on the humidity of the material under study; thus, the amount of humidity can be judged by the reading of an electrical measuring instrument, which is connected to the electrodes of the probe.

The subject of the invention is a similar probe, designed specifically to control the moisture of the molding earth in molds and to determine the degree of drying of the molds conveniently under production conditions.

The essence of the invention lies in the original design of such a probe; in order to maintain a constant distance between the electrodes and the possibility of introducing them through one hole, one of the electrodes, mounted in a handle

TKE, made tubular and inside it with a gasket of insulating sleeves inserted the shank of the second electrode forming the probe head (see drawing).

Two electrodes are inserted into the ebonite handle 7, one made in the form of a zinc tube 2 with a shoulder and the other 3 in the form of a bronze rod. The latter has a thread on which the nut V is screwed. The ebonite bushing 7 is put on the rod 3 and together with the rod 3 is inserted into the zinc tube 2, then the ebonite sleeve 6 is fastened on the opposite end 3 and fixed by a nut 4. 6, centering the rod 3 and preventing it from connecting to the tube 2. The wires 4 are soldered to the nut 4 and the tube 2, which lead to the hole in the side surface of the ebonite handle. The hole has a thread into which the nut 5 is screwed in, preventing the conductor from tearing off and breaking the contact.

So mounted

259