Murata Manufacturing Co., Ltd.

Tomoyuki Yamamoto

Takashi Shikama

Atsuo Yokota

Yuichi Takaoka

Kiyofumi Torii

Takashi Kobayashi

In a heating apparatus including a plate-shaped positive temperature coefficient thermistor having a pair of electrode films, a pair of terminal plates of an elastic metal material are provided on the pair of electrode films of the thermistor, and there is further provided a spacer including a mounting through-hole which passes through the spacer in a thickness direction thereof. The spacer receives the thermistor in the mounting through-hole so as to position the thermistor therein between the pair of terminal plates. Each terminal plate comprises at least one extending portion extending in a longitudinal direction thereof from one portion of one end thereof, and the extending portion comprises a stopper piece which is folded toward the spacer, the stopper piece including a hook-shaped engaging stopper at an end of the stopper piece. Furthermore, the spacer comprises an engaging through-hole formed at a position corresponding to the engaging stopper of the stopper piece of each of the pair of terminal plates and the engaging through-hole passes through the spacer in the thickness direction thereof. The pair of terminal plates are elastically urged toward the pair of electrode films of the thermistor, and each engaging stopper is inserted into a corresponding engaging through-hole so as to engage in the spacer.

Heating apparatus comprising a plate-shaped PTC thermistor accommodated

A light bulb protection arrangement including a lamp, a socket, and a junction socket having a base portion and a socket portion so as to attach the light bulb to the socket. The junction socket includes a connecting terminal, a first terminal to be connected to the central electrode of the socket, a second terminal to be connected to the central electrode of the light bulb, and a negative temperature coefficient thermistor connected between the first terminal and the second terminal.

Lamp protection arrangement

A PTC thermistor device includes three PTC thermistors aligned and disposed in a heat transmission relation to each other such that the center PTC thermistor provides heat to the other PTC thermistors which are so connected as to define a part of path for the demagnetizing current. The two PTC thermistors positioned on the opposite sides of the center PTC thermistor increase their temperature rapidly so that a rapid and effective attenuation of demagnetizing current can be obtained.

Demagnetizing circuit using a PTC thermistor device

A combination starter-protector device for a winding circuit of a dynamoelectric motor comprises a housing structure having a perforated wall dividing the interior of the housing structure into starter and protector compartments. The starter compartment accommodates therein a positive temperature coefficient thermistor while the protector compartment accommodates therein a bimetal switch. The housing structure has two sets of terminals, one set of the terminals being adapted to be connected to the winding circuit of the motor whereas the other set of the terminals are adapted to be connected to a power source. The distance between the thermistor and the bimetal switch may be adjustable by the employment of a spacer element.

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Omihachiman, Japan

Tomoyuki Yamamoto