DE1772081U - COMBINED SWITCHING DEVICE FOR SWITCHING THE LOW AND HIGH VOLTAGE CIRCUITS OF AN ELECTRICAL SYSTEM FOR WRITING AND / OR DRAWING NEON LIGHT. - Google Patents

Description

Combined switching device for switching the low and high voltage circuits an electrical system for writing and / or drawing neon light.

In electrical systems for writing and / or drawing neon light are one or more high-voltage fluorescent tubes with tapping electrodes or - fluorescent tubes provided. In the following description these simply referred to as "tubes".

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Claims (1)

Protection claims 1.) Combined switchgear for switching the low. and high-voltage circuits of an electrical system for writing and / or drawing neon light with one or more high-voltage fluorescent tubes or fluorescent tubes provided with tap electrodes, the sections of which are located between the taps of the tubes periodically by means of a rotating circuit driven by an electric motor fenden switching device can be switched on one after the other and subsequent, preferably at the same time, from are switchable, the sections of the tubes to the Secondary windings of one or more transformers are connected via a contact track and one or more movable switching elements belonging to the switching device of a first type, while the primary winding of the transformer or transformers can be connected to the alternating current network via switching elements of a second type, characterized in that the movable switching elements of the first type are connected by a switching drum (or several switching drums 10, 10 '...) are formed, which are designed and arranged so that they bridge a plurality of resilient contacts (16) forming the contact path, each of which can be connected to a tapping electrode (18) , and when the roller rotates, these contacts (16) leave (leave) one after the other, and that the switching elements of the two- th type around outside of the roller axis (6) arranged rotary bearing (211) tiltable mercury switching tubes (21, 21 * ...) which can be controlled by a rotating cam device or control roller (11) which is arranged on the same axis (6) as the switching drum (10, 10 '...) or an extension of this. 2.) Combined switching device according to claim 1, characterized in that the points of contact between the resilient contacts (16) and the switching drums (10, 10 '...) are arranged in a straight line in a row, and that along this row there is an isolated, A burn-off or fusible link (30) holding the switching element of a safety switch (22) in the switched-on position at a distance extends along the contacts (16). 'I. 3.) Combined switching device according to claim 2, characterized characterized in that the burn-off or fusible link (30) consists of an electrically insulating material. 4.) Combined switching device according to claim 2, characterized in that that the burn-off or fusible link (30) consists of a plastic thread, preferably a polyamide. 5.) Combined switching device according to claim 1, characterized marked, that the switching elements of the second type forming mercury interrupter tubes (21,21 @ ...) be carried by pivoted rockers (212), which over in their The length of the control pin (20), which can be adjusted by a screw connection (200), is from a hollow cylindrical one Control roller (11), the circumference of which is cut out in steps, can be controlled. 6.) Combined switching device according to claim 2, characterized in that the safety switch is formed by a mercury switch (22) which is arranged on a pivotably mounted rocker (221) which is on the thread-like burn-off or fusible link (30). supports. 7.) Combined switching device according to claim 1, characterized in that the resilient contacts (16) forming the contact path are fastened next to one another on a contact strip (163) and are made of high quality through partitions Insulating material (164) separated and with on iner connection plate (13) "on the gap" staggered connection Bushings (15) are connected, which are located in a perforated wall (152), preferably free-standing perpendicular thereto, from the frame (2-5) and correspondingly staggered holes (151) for the insertion of connecting lines (17).