| 摘要 |
Symmetrical lock which can be operated by means of two coins, consisting of a casing with two slots for the insertion of respective coins and a tongue displaceable in a left/right direction. It is characterized in that: a) the casing has a longitudinal plane of symmetry; b) two tongue stops opposite the coins and a dog engaging with one or both tongue stops are provided, the three elements being arranged on the same pivoting axis; c) the tongue has an opening with a notch with which the ends of the dogs interfere when the tongue is displaced in the absence of coins, and with an end seat for said ends when the tongue is displaced in the presence of coins; d) below the opening and on each side of the tongue there are respective fixed stops and respective movable stops which are coupled together by means of a positioning lever driven by the tongue via a pin on which it is able to pivot.
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