Abstract: A thermal protector includes a stationary electrode having a contact end connected to the top end of a zigzag plate heater and a snap-acting thermosensitive element having a movable electrode with a contact end connected thereto. The stationary electrode and the movable electrode are opposed to each other and the two contact ends can be open or closed. The stationary electrode and the movable electrode are fixed within a container.

Abstract: An electrode mount with a stationary electrode and a movable electrode facing each other, the movable electrode including a snap-acting and thermosensitive element which comes into contact with and out of contact with the stationary electrode, fixed thereon by a frit glass bead is encased in a glass envelope having an opening at one end thereof. A sealed portion for sealing the frit glass bead and the opening of the glass envelope is formed by melting frit glass therebetween.

Abstract: A thermal protector of the type comprising a stationary electrode, a movable electrode having a heat responsive element which is disposed in opposite relationship with the stationary electrode, a block of a thermistor with a positive thermal coefficient and having two axial through holes, and electrically conductive sleeves which are partially inserted into or fully extended through the holes of the block, the stationary and movable electrodes being extended through sleeves. The thermal protector can precisely operate at a predetermined temperature and exhibit high resistance to vibration so that it is highly reliable and dependable in operation.