Check-actuated control mechanisms – Including noncontacting – relatively movable parts connected...
Patent
1982-07-15
1984-10-02
Tollberg, Stanley H.
Check-actuated control mechanisms
Including noncontacting, relatively movable parts connected...
194 1E, G07F 502
Patent
active
044742800
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a coin-operated lock adapted for installation on a trolley being part of a system of such trolleys, especially shopping and luggage trolleys. The coin-operated lock is arranged for release of a secured trolley by insertion of a coin, and for repayment of the amount deposited when the trolley is returned, the lock having two blockable keyholes for accepting separate keys, one of which is anchored to the trolley on which the lock is mounted. The lock is further arranged so that when a coin is inserted, one keyhole is released for accepting and securing the said key anchored to the same trolley, so that the other keyhole secures a key belonging to another trolley or a coupling unit, so that the other keyhole--when the said key anchored to the same trolley is inserted in the former keyhole--is released for release of the other key, and so that the former keyhole is released for release of the said key secured therein and anchored to the same trolley, and for repayment of the coin when the other key is inserted in the other keyhole.
Release and anchoring of the trolley is thus done by simple insertion and withdrawal of a key into and from a keyhole. The keys are suitably fixed to the trolleys by a chain. Interlocking of trolleys is not dependent on their completely correct alignment mutually or with the coupling unit.
The key system also permits a special simple embodiment since at any rate the keys belonging to the trolleys can be arranged as a carrier for the coin, and the said former keyhole can be arranged for only accepting a key carrying a coin. It means that payment and insertion of the key belonging to the same trolley can be combined.
The object of the invention is to show how the coin-operated lock can be designed as a construction which is not only simple to operate, but which is also of a simple and robust design and thus suitable as a unit which can be designed in a space saving manner which can be fixed to the trolley easily, and which can give satisfactory operation even if it is operated by little trained persons.
This object is, according to the invention, achieved by each keyhole having a tumbler arranged for securing a fence in a blocking position in one of the keyholes for securing a key inserted therein, and by the fence being movable from this blocking position to a blocking position in the other keyhole by means of abutment units which from the fence project into separate keyholes and which are adapted for actuation by a key which is inserted into the relevant keyhole.
It means that there is a common fence for both keyholes which can be moved to and secured in each blocking position by separate keys and tumblers since the fence function is controlled by the interaction between the requisite keys for operation of the lock. The locking mechanism can be given a robust construction because it has but few parts which are to be moved. The possibility of arranging the coin-operated lock for operation by keys, one of which is constructed as a carrier for a coin, can according to the invention be satisfied in a simple way by one of the tumblers being arranged only for interaction with a key carrying coin. Besides, the principle of a common fence permits a space saving construction as according to the invention the keyholes can be designed as two slotted channels positioned opposite and parallel to each other and are arranged for acceptance of keys designed for insertion, and that the stops project into their separate channels.
A simple embodiment of the coin-operated lock can also, according to the invention, be that the fence is made as a swingable unit, the axis of rotation of which lying between the planes of the keyholes and parallel to these, the fence at its free end remote from said axis being provided with opposite projecting securing projections which, depending on the position of the fence, are arranged for a securing mesh with separate keys.
According to the invention the tumblers can be arranged for both a springy securing effect on the keys in a direction oppo
REFERENCES:
patent: 3197008 (1965-07-01), Moore
Catena-Locks A/S
Tollberg Stanley H.
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