Abstract: An engine starter has a plunger electromagnetically actuated by holding and attracting coils to move a pinion toward a ring gear on the engine and also to move a first movable contact on the plunger towards first and second stationary contacts to be electrically connected together by the first movable contact to electrically energize a starter motor. A relay is provided and has normally open contacts electrically connected in series to a power source and the connection between the holding and attracting coils. The relay coil is connected in series to a starter switch and a temperature sensor. The temperature sensor is formed by a normally closed switch having a third stationary contact connected to the relay coil, and a bimetallic element carrying a second movable contact grounded through the bimetallic element.

Abstract: An electromagnetic switch has a movable contact and a stationary contact accommodated and sealed in a container of a given shape. In the container, there are provided at the axial top and bottom of the container, meander venting paths for communicating the inside of the container with surrounding atmosphere. The ventilation of the inside of the container is thus effectively attained by the meander paths so that the formation of ice on the stationary contact can be prevented.

Abstract: In a torque transmitting mechanism of a starter, there is provided a shock absorbing arrangement having an input member and output member. When an abnormal torque appears, the members slip on each other to absorb such shock.