| 摘要 |
1,225,929. Preventing unauthorized use of I.C. engines. W. BEIER. Oct.2, 1969 [Oct.3, 1968], No.48426/69. Heading F1B [Also in Division H1]. An electric switch for non-detachably mounting on an ignition distributor or on an ignition coil has an insulating member such as 32 Fig. 2 which is lockable in position between contacts 33, 34 in the high tension ignition circuit. In the example shown the member 32 is rotatable by a barrel lock 39 through a drive member 40 and has a helical fin 38 engageable with the sides of spring loaded fixed contacts 33, 34 whereby it is moved axially. A transverse conductor insert 37 in the member 32 normally bridges the contacts 37 but the rotational and axially movement of the member 32 ensures a long air gap when the switch is open. In another embodiment, spring blade contacts (10,11) Fig. 1 (not shown) are separated by a rotatable insulating disc (21) coupled to the lock barrel and containing a conductive insert (18). In a further embodiment the spring blades (54) Fig.3 (not shown) normally engage each other but are separated by an insulating member (58) which is pushed axially of the lock barrel when the key is turned. |
