JPS6284188U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a sectional view of one embodiment of the deceleration plate-equipped spillover indicator according to the present invention, Fig. 2 a and b are structural examples of a disc-shaped indicator, and Fig. 3 is an explanation of how to use the inventive indicator. FIG. 4 is a sectional view showing an example of the structure of a conventional flashover indicator. 1: Bottomed cylinder, 2: Horn insertion cylinder, 3: Small diameter cylinder, 4: Boundary step, 5: Valve plate, 6: Bottom, 7:
Micro-diameter hole, 8: disk-shaped indicator, 10, 12: arc horn, 14: discharge path.

Claims (1)

[Scope of utility model registration request] One half of the bottomed cylindrical body made of insulating material such as synthetic resin serves as the horn insertion tube into which the arc horn is tightly inserted, and the other half serves as the small diameter cylindrical portion that constitutes the air chamber or arc extinguisher chamber. A valve plate having a diameter slightly smaller than the inner diameter of the horn insertion tube is mounted on the boundary step between the horn insertion tube and the small diameter tube, and a small diameter hole is formed in the center of the bottom of the small diameter tube to penetrate inside and outside. A hole is formed, and a disc-shaped indicator body of a desired thickness and diameter made of a flexible synthetic resin material such as bridged polyethylene foam is integrally fixed at an appropriate position on the outer periphery of the bottomed cylinder. A flashover indicator with a speed reduction plate.