Mitsubishi Materials Corporation

Takashi Shibayama

Fujio Ikeda

Hiroyuki Ikeda

Masatoshi Abe

Takaaki Itoh

Takaaki Ito

Takashi Kurihara

Kazuyuki Arai

Tomio Iwata

Naoyuki Tomita

A protection structure for a surge absorbing element for protecting equipment such as communications lines from surges caused by lightning or the like which makes use of a surge absorbing element in parallel with the equipment to be protected and a low melting point metal wire in direct contact with the element and in series therewith. The structure protects the surge absorbing element or assembly from continuous overvoltage or overcurrent which may be generated by a short-circuit of an alternating electric current source and the like.

Protection structure for surge absorbing element

A surge absorber in which a thermal response switch is inserted in an input line at the input side of a surge absorbing element. The switch includes a conductive spring piece and a conductive hook piece. The base end of the conductive spring piece is fixed on either the first lead or the second leads and the tip of the conductive spring piece is provided with a pawl. The base end of the conductive hook piece is fixed on either the first lead or the second leads and the tip of the conductive hook piece is engaged with the pawl. At least one of the conductive spring piece and the conductive hook piece is made of a thermal response piece. Upon stopping of the applied continuous overvoltages or overcurrents, the switch can automatically be restored depending on an extent of the overcurrent by a manual operation.

Surge absorber

A surge absorber including a surge absorbing element for protecting communication equipment from transient surges and a thermal response switch with an automatic restoration function connected in parallel with the surge absorbing element. The inventive surge absorber prevents abnormal and deleterious heating of the surge absorbing element when continuous overvoltages or overcurrents are applied to the surge absorber.

Surge absorber for protection of communication equipment connected to

The surge absorber having a surge absorbing element, and first and second wire means for electrically connecting the surge absorbing element across the input lines of an electronic device. The first and second wire means are connected to the surge absorber by conductive heat releasable means, for example, a low melting point solder. The second wire means includes a spring loaded member such that, on release of the first or second wire means by the first or second heat releasable means, respectively, by melting of the solder due to heat generated by the surge absorbing element, the surge absorbing element moves away from the first or second wire means. The surge absorber prevents an abnormal heating of the surge absorbing element when continuous overvoltages or overcurrents pass therethrough.

Growing community of inventors

Saitama, Japan

Takashi Shibayama