Low pressure gas discharge switch - has electrical lead-through which passes via metal tube housing base to forming insulated holder for cup-shaped control electrode holder and to trigger control electrode.

摘要

The switch has at least two spaced apart main electrodes for low pressure gas discharge. These form an anode (3) and a cathode (2) in a switch chamber (1). The discharge is started by increasing the cathode electron density. The chamber (1) contains an ionisable gas medium. Its pressure is selected so that the discharge ignition voltage between the cathode (2) and the anode (3) decreases with increasing product of p and d. The cathode (2) chamber contains a control electrode (10) open on the discharge side (8). It is separate from the cathode (2) and connectable to a trigger voltage source. The chamber housing (14) is a metal tube (20) with a metal base (20'). An electrical lead-through (34) for triggering the control electrode (10) runs through the base (20'). The lead-through (34) also forms an insulating holder for the control electrode (10) arranged concentrically in the chamber (1). ADVANTAGE - Improved construction with simplified manufacture.