SU30340A1 - Automatic electromagnetic switch for switching the poles of the dynamo of the machine when the direction of rotation of the latter is changed - Google Patents

Description

In some installations for electrical lighting of trains, it is necessary to use a switch to appropriately switch contacts, in order to maintain a constant direction of current in the external circuit when the direction of rotation of the dynamo is changed. The proposal relates to a device of such an electromagnetic type switch and consists in a constructive form of its implementation.

The switch has two electromagnets / and //, each having two windings, of which the thin winding M turns on the voltage resulting from the residual magnetism of the dynamo, and the thickness winding B turns on the normal voltage. The windings of both electromagnets are respectively connected to each other and turned on so that the electromagnet cores get the same polarity at the ends facing the magnetic poles ///a and /// in the rotary core /// turning around the axis O. A winding d powered by clamps - | -v4 p -l battery trrnoy battery. With a core bonded contact 9, 2Y

10 vi 3, moving when the core is turned: first through contacts 5, 5, b and 7, second through contact and third through contact 7; at that, the slider 3, when the core turns, becomes one of the insulating plates 2 and thus interrupts the current in the core of the winding of the core ///.

Contacts 5, 6 are connected to the end of the thick winding B, and contact 7 to the end of the thin winding M. Contacts 4 L 1 are connected to the - | -L and -L terminals of the battery. The contact 8 is connected to one of the dynamo clamps / the other clamp of which is connected to the beginning of the windings M and B. The switch is also provided with a number of contacts a, a. b, 6, c, c ,, g, rb connected both with the core clamps and the clamps - {- H yi - H of the lighting network, as well as among themselves, as shown in the diagram. 1, contacts a and c, c d, b, and fli, a, and r, when rotating the core ///, are interconnected by brushes attached to the ends of the crr.

When electrolytes are excited and / and // due to the passage of current through the thin winding, the measles rotates in one direction or another, turning on the winding (through contacts 5 or b), as a result of which the field

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