Appeal No. 1997-3483
Application 08/254,575
unlocking a pledge lock used to lock one shopping cart to a
string of other carts. The insertion of the card moves a
control member which unlocks a closure bolt, which releases a
coupling member of an adjacent cart and the cart can be
released. The card is seized and retained in the released
cart and is released from the cart only when the cart is
brought back and coupled back to the string of carts. The
invention is further illustrated by the following claim.
Representative claim 20 is reproduced as follows:
20. In combination with at least two carts, a lock
system comprising:
a pledge lock on one of said carts;
a locking member of the other of said carts receivable in
said pledge lock and releasable thereform;
a card for operating said pledge lock, said card having
along an edge or on a surface thereof at least one recess or
at least one projection constituting a formation specific to
said card and distinguishing said card from cards free from
said formation; and
bolt release and card seizure means in said lock operated
by said formation upon insertion of said card into said lock
for releasing said member and seizing said card and for
retaining the seized card until the member associated with the
other cart is inserted into said lock.
The references relied on by the Examiner are:
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