IMPROVEMENTS IN LOCKS AND IN KEYS FOR SAME
Year: 1881

page_text: PROVISIONAL SPECIFICATION left by Ingebrigt Johnsen Glorum at the
Office of the Commissioners of Patents on the 14th June 1881.
INGEBRIGT JOHNSEN GLŒERUM, of Christianssund, in the Kingdom of Norway.
"IMPROVEMENTS IN LOCKS AND IN KEYS FOR SAME.”
The Invention as applied to a padlock or other round lock is as follows:-
The foundation plate or backing of the lock is fitted or formed with the usual
outer enclosing rim and has an inner circular projecting rim; within the latter
there is a disc having a projecting rim at the circumference fitting in the rim on
the backing, and another inner projecting rim concentric therewith; the disc is
movable round its centre, but limited by one, two, or more pegs which work in
slots at different distances above the backing, and have their heads pressed against
the outer rim of the movable disc by means of springs. The movable disc has a
fixed bolt which can engage with the usual semicircular jointed padlock closing
link. Inside the inner rim there is a lug fixed to the movable disc.
The key is fitted with movable wards or pieces which can move to a certain
extent round the central stem against a fixed part thereon, and relatively to each
other. When the key is inserted and turned this action takes place, and the wards
on the key then press the heads of the corresponding pegs outside the rim on the
backing; the innermost ward of the key then comes against the aforesaid lug, and
by continued turning of the key the moveable plate is turned round its centro
until the pegs bottom against the narrow ends of their slots. The bolt is then
moved and the lock opened. To relock it, turn the key the opposite direction, and
all its wards will then come against another lug fixed on the moveable disc and
turn latter round until the heads of the pegs are pushed down into the wide ends
of their slots by means of the springs.
Similar arrangements are adapted for other locks with disc movable round its
centre by means of a key with shifting wards.
The key is sometimes made with a central stem (having the usual hole in the
end into which the corresponding pin in the key hole enters) and an outer sleevo
part, each made with a fixed ward, there being also one or more movable wards;
the inner stem may on locking and unlocking be made to turn one way and the
sleeve the other way.

page_text: The Invention is also applicable to locks having an ordinary or sliding bolt
without the aforesaid disc turning round its centro. The bolt may work in a
staple at each end on the lock and have notches for springs which hold it in the in
or out position and engages with the key, also a spring with hook end which
holds the fixed ward on the inner stem of the key when all the springs are pushed
out of gear, and which is provided with a lug having slanting sides, also stops on
each side of the key holo, one for preventing the fixed ward on the sleeve from
turning to the left, and another for preventing the movable wards from turning to
the right. The action in one such arrangement on inserting the key for locking
would be, first, to turn the sleeve with its ward to the right under or past the stop
at the key hole and the lug on the spring with the hook end; by then turning the
inner stem of the key to the left until its first ward is held by the spring with the
hook ond, and the other two wards engaging with the two other springs, all the
three springs come out of gear with their notches; by continuing to turn the key
sleeve the bolt is moved. To lock the lock, the key sleeve is turned back until its
ward comes against its key hole stop, and on its way it raises the spring with the
book end, whereby the other wards are released, and when these are turned back
until they come against their key hole stop, tho koy can be taken out.
Tho chief features of this Invention are that the locks with movable key wards
cannot be picked, that many alterations can be made in the form of the key and
the lock, that the lock as such can be applied to various purposes, that they are
cheaper than other locks which cannot be picked, and that the construction of keys
with movable ward is an entire novelty as far as I have been able to ascertain.