Coin-deposit lock

Check-actuated control mechanisms – Control mechanism actuated by check – other than coin – which... – Having means to test physical characteristic of check

Patent

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Details

194247, 194905, G07F 700

Patent

active

054959306

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

The present invention relates to a coin-deposit lock, said lock being adapted to be placed on a trolley and being of the kind set forth in the preamble of claim 1.


BACKGROUND ART

Coin-deposit locks of this kind are e.g. disclosed in the DK Published Applications Nos. 145,550 and 145,952, and the International application No. WO 82/01950, being included herein by reference. These coin-deposit locks suffer from the disadvantage that they are not especially selective with regard to the size and hence the value of the coin having been inserted, for which reason they are less suitable for achieving the purpose of such coin-deposit locks, viz. to ensure that the trolley is returned and connected to the row of trolleys, to which it belongs, so that the amount deposited is returned.


DISCLOSURE OF THE INVENTION

On the above background, it is the object of the present invention to provide a coin-deposit lock of the kind referred to above, said lock being adapted to sense the size and hence the value of the coin having been inserted, and which only releases the trolley from the row of trolleys, if the inserted coin has the correct size.
This object is achieved with a coin-deposit lock additionally exhibiting the features set forth in the characterizing clause of claim 1.
If, with this arrangement, the coin having been inserted has a larger diameter than the correct coin (provided that it is at all possible to insert the coin in the coin-insertion opening) or a smaller diameter than the correct coin, then the first latching member on the release member cannot engage in the through-going apertures in the main slide and the measuring slide, and the release member cannot pivot towards its first position and release the second key belonging to a preceding trolley in the row from the second key opening so as to liberate the trolley from the row of trolleys. Then, the wrong coin having been inserted will simply be returned to the coin-insertion opening when the first key is again removed from the first key opening. Solely when a coin of the correct size is inserted into the coin-insertion opening, the second key will be freed from the coin-deposit lock and the first key will be retained in the lock.
Admittedly, parts of the features set forth in the characterizing clause of claim I are disclosed in the DK Published Application No. 163,387, but this publication relates to a coin-deposit lock of a different kind from the one set forth in the preamble of claim 1, as this known coin-deposit lock has only one single key opening adapted to receive and retain a key belonging to a preceding trolley in a row of trolleys, said key being freed from the key opening upon insertion of a suitable coin in the lock and depressing an operating head. This known coin-deposit lock, which incidentally in the embodiment shown and described is adapted to accept coins of two different sizes, suffers from the conspicuous disadvantage that the key chained to the lock itself or to the trolley, to which it is secured, has to be chained with a chain, that is too short to allow this key itself to be introduced in the key opening of the lock to free the coin having been inserted. In this case, the effect to be achieved with the lock would, of course, be lost, since a user of the trolley could free the deposited coin as she or he pleases and without the trolley having been returned to the row of trolleys and chained to a preceding trolley. The short chain length, which is necessary in such a case, will on the other hand make it extremely difficult to connect the trolley to a preceding trolley in the row of trolleys by inserting its associated key in the key opening, for which reason this known coin-deposit lock can at best be considered as not being very practical. These disadvantages are avoided completely with the coin-deposit lock according to the present invention, with which the length of the chain connecting the first key to the lock may be choosen freely to suit the chaining-together of the trolleys in the row, and with which

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