SERIE DI ELEMENTI COSTRUTTIVI COMPOSTA DI SERRATURE CILINDRICHE, CUSTODIE DELLE SERRATURE CILINDRICHE E DEGLI USUALI COMPONENTI AUSILIARI PER SERRAMI PER VEICOLI A MOTORE.

摘要

A lock assembly has a tubular secondary lock housing having an inner wall generally centered on an axis and formed with an axially extending and inwardly open groove. A core plug is rotatable in this housing and has a central axially extending and open key-receiving passage. Axially spaced tumblers are exposed at this passage in the plug and are diametrally displaceable therein along a diametral plane between outer positions projecting radially beyond the outer surface and inner positions lying radially within the outer surface. These tumblers are only displaceable into the outer positions when they are radially aligned with the groove and when they are in the outer position and engaged in the groove they block the core from rotating in the housing. The tumblers have respective control edges subdivided at the diametral plane into first edge regions and second edge regions which are out of line with each other. First and second differently bitted keys are engageable in the passage with the control edges of the tumblers. The first key has first bits engageable only with the first regions of the tumbler when the first key is in the passage and the second key is similarly only engageable with the second regions of the tumblers. The bits and regions are so constructed that, even though the keys are completely differently bitted, either one can displace the tumblers into the inner position for operation of the lock.