SU52128A1 - Device for recording the time of the electrical circuit under voltage - Google Patents

Description

The object of the present invention is a device for taking into account the time when an electrical circuit is under voltage within certain pre-regulated limits. The proposed device is primarily intended to take into account the burning time of a welding arc of direct or alternating current. In the device, a heated filament voltmeter relay acting on the clock mechanism used to account for time was used as a reacting organ.

In the proposed device according to the invention, the contact system is made in the form of a two-arm lever, which closes with its ends in two places the circuit of the electromagnet acting on the clock mechanism if the voltage of the controlled circuit is within the set limits and opens this circuit in one contact if voltage is equal to or less than the minimum set voltage, and elsewhere, when it is equal to or greater than the maximum. As a result, the device can be used not only to take into account the time of the welding arc, but also to determine

coefficient of use of the welding station.

The invention is illustrated in the drawing, which shows the electrical circuit of the proposed device.

The device consists of two spring clocks, of which clock 7 shows the duration of operation of the welding station, and clock 2 integrates the time of burning of the volt arc. Those and other watches have arresting devices 5 acting on the running gear of the watch and stopping them or setting them in motion when the starting electromagnets 4 are triggered when current is flowing or interrupted from the current source 5.

The closing of the winding circuits of the starting electromagnets 4 and their opening is made by mercury contactors. Each contactor has a double-arm lever-clips-like conductive jumper 6, mounted on a rotating drum 7. The angle of rotation of the drums depends on the voltage at the terminals of the current source feeding the welding volt arc (at the terminals of a single-station welding generator, in the welding network after

a regulator with an alternating current arc, etc., to which the terminals 8 of the device are parallel with the volt arc; The current from these clips passes through the metal heated hairs 9 and the adjusting resistors JO. Threads II, connected to the midpoints of hairs 9 and stretched by springs 72, are thrown through the drums 7.

Mercury contactors are adjusted so that the clock / start-up electromagnet circuit is open when there is no voltage at the terminals 8, i.e., when the welding current source is not turned on, when the voltage of the same volt arc is running and when the welding current source is idle, the circuit is closed, and the clock 7 receives a stroke for the entire time, until the welding current source is turned off from the working position. The contactor of clock 2 is adjusted somewhat differently, namely: it gives the short circuit of the starting electromagnet only if there is a voltage on the terminals 8 corresponding to the voltage of a high voltage arc (position II). When the voltage is short-circuited (position 1) and when idling (position III), the circuit is open and the clock 2 is worth t. Thus, the clock 2 will go only when the welding arc is on.

As a current source 5 supplying the starting electromagnets circuit, either a battery or a copper oxide rectifier (with an alternating welding current) or a rheostat (with a DC arc) is taken.

Distinctive features and advantages of the proposed device in comparison with existing similar devices are:

1. The ability to determine both the net burning time of the volt arc and the utilization rate of the welding station.

2. Use only the voltage of the welding circuit for operation of the device, which makes it possible for the device to operate for the operation unnoticeable for the welder and without breaking the welding conductor.

3. The instrument can be installed at any distance from the welding station (at the master desk, in the laboratory, etc.).

4. There is no need to use an electric clock. The use of spring clocks eliminates the constraint with the chain of electric clocks.

5. The use of a thermal voltmeter relay as a reacting organ makes the device suitable for both constant and alternating currents.

The subject matter of the invention.

A device for recording the time of an electrical circuit under voltage at certain, pre-regulated limits, mainly to take into account the burning time of a welding arc of direct or alternating current, using a heated filament voltmeter relay as a reacting organ that the contact system of the device is made in the form of a two-armed lever, which closes with its ends in two places the circuit of the electromagnet acting on the clock mechanism in the event that the voltage of the circuit to be taken into account is within the established limits, and opening the indicated circuit in one contact if the voltage is equal to or less than the minimum established voltage (for example, during an arc short circuit) and in another place when it is equal to or greater than the maximum voltage (for example, idle arc).

to the author's certificate of V.P. Vologdin

No. 52128

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