Fire-preventive housing for line delay measuring apparatus

Details Fire-preventive housing for line delay measuring apparatus Fire-preventive housing for line delay measuring apparatus

1984-12-06

1987-04-21

Eisenzopf, Reinhard J.

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

361380, 361422, 174 52PE, 324156, H05K 700, H05K 500

Patent

active

046601260

ABSTRACT:
A fire-preventive and flame-proof housing for line delay measuring apparatus, the components including a high-tension voltage supply, a display tube and operating elements and indicator elements, comprises a first section defined within the housing in which are positioned components carrying relative low voltages and without significant fire hazard, a second section defined within the housing adjacent to the first section, wherein are positioned those of the components carrying high voltages, and such components as are otherwise intrinsically unsafe, the second section being hermetically sealed and filled with insulating material. The housing includes a front panel and a partition separating the first and second sections, a cover is detachably mounted on the housing and sealed relative thereto by a resilient sealing element about an aperture of the housing. Potentiometers for focus and intensity functions of the display tube are positioned in the second section, and a potentiometer spindle and selector switch spindles extend from the second section through the partition to the front panel, with sealing between the partition and the spindles and between the spindles and the front panel. The display tube face is preferably positioned in a partition opening, and a hermetically inset glass pane mounted on the front panel for viewing the tube from the front panel.

REFERENCES:
patent: 1947085 (1934-02-01), Hill et al.
patent: 2898585 (1959-08-01), Bauman
patent: 3061779 (1962-10-01), Boswell et al.

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