Abstract: The invention relates to a pledge lock for shopping trolleys and luggage trolleys, to be releasably attached to one another, the lock having a casing 1 attached to the first trolley and formed with an opening 1b for a pledge and an opening 1a for a coupling member, which is attached to the second trolley and kept locked by a closure bolt until the pledge has been inserted, the pledge being a card which during insertion moves a control member 3 which moves the closure bolt 4 out of the locking and into the unlocked position, the card having at least a first zone which can be bent out of the plane of the card in relation to the remaining, second card zone by a lock projection 14 extending into the card insertion path, said first zone when in the bent-out state impinging directly or via an intermediate member against a stop 3d of the control member, in order to move the control member.

Abstract: A pledge-lock cooperates with a pledge card having a deformable portion and a rigid portion such that the deformable portion deforms upon insertion to serve as a check on the card. When a proper card is inserted it actuates the pledge lock to release the cart and retain the card.

Abstract: The invention relates to a pledge lock for a shopping trolley, having an information carrier which can be temporarily applied in or on the pledge lock which can thus be unlocked and operatively connected to a shop computer, items of information can be read from the information carrier and transmitted to the shop computer and/or items of information which can be transmitted by the shop computer can be stored on the information carrier.

Abstract: A lock used in combination with a shopping- or luggage cart and a stationary anchor element has a housing fixed on the cart, a retaining member movable on the housing between a locked position engaging around the anchor element and securing the cart thereto and an unlocked position disengaged from the anchor element, a first actuating mechanism in the housing connected to the retaining member for displacing it between its positions on actuation of the first mechanism by a card, coin, or token, a key, and a second actuating mechanism in the housing connected to the retaining member for displacing it between its positions on actuation of the first mechanism by the key.

Abstract: A receiving member for a pledge lock of a shopping or luggage trolley, wherein the receiving member is attached to the trolley handle and contains the pledge lock in its cavity, while projecting from each side of the receiving member is a pin whose cross-sectional shape and diameter correspond to the cross-sectional shape and diameter of the cavity of the handle section of the cart.

Abstract: The invention relates to a card for a pledge lock, more particularly of a shopping or luggage trolley, wherein the lock can be magnetically actuated by the card.

Abstract: A lock system has a housing formed with an outwardly open latch port and an actuating port, a latch member adapted to be inserted into the latch port, an actuator--normally either a card, token, or coin--adapted to be inserted into the actuating port, and a latch element movable between a holding position retaining the latch member against removal from the latch port and a freeing position permitting such removal. A control element is movable on insertion of the actuator into the actuating port from a locked to an unlocked position, and interengageable formations on the elements displace the latch element into the freeing position on displacement of the control element by the actuator into the unlocked position.