Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – Fusible element actuated
Patent
1983-07-07
1985-05-28
Broome, Harold
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
Fusible element actuated
337295, H01H 8504
Patent
active
045203385
ABSTRACT:
Cylindrical fuses in which, when overcurrent flows to an electric circuit, the part of the electric circuit formed by metal having a low melting point is fused to maintain safety of various electric machinery and equipment.
The cylindrical fuse includes a cylindrical or bar like insulator formed of glass, porcelain, ceramics, plastics and the like and metals having a low melting point which are adhered to the cylindrical or bar like insulator by means of printing, coating, electroplating and the like, for example, lead or an alloy of lead and tin. A fuse terminal to be formed at both ends or one end of the cylindrical or bar like insulator and a fuse portion formed continuously between and connecting the fuse terminals are formed by the adhesion of the metals of low melting points.
Since the cylindrical fuse is formed by adhering a metal having a low melting point on the cylindrical or the bar like insulator, the number of component parts is relatively small, the manufacturing process is shortened and the manufacturing efficiency is tremendously elevated. This results in a large reduction in manufacturing cost when compared with conventional cylindrical fuses. Moreover, the width or the thickness of the metal of low melting point which is adhered to the cylindrical or the bar like insulator is adjusted to manufacture the various kinds of the cylindrical fuses having different allowable electric current values.
REFERENCES:
patent: 4394639 (1983-07-01), McGalliard
Broome Harold
Philpitt Fred
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