Improvements in Keys and Keyholes for Door Locks.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in Keys and Keyholes for Door Locks.
I, CÉLESTINE RUBENS, of No. 11, Barrow Road, Streatham Common, County of
Surrey, do hereby declare the nature of this invention to be as follows:
This invention relates to locking doors of every. description and is constructed
so that locks thus made cannot be opened by unauthorised persons for this pur-
pose the lock is previded with a round or square tubular key hole which has this
advantage that no hook to turn the lock can be introduced into it, only the
original key which is constructed as follow the bow & pin of the key are ordinary
but the bit of the key is movable and swings in a slot provided for that purpose
the wards my be of different form for security. This key my be constructed of
any suitable material, to introduce the key into the round or square tubular pas-
sage which forms key hole, the movable bit must be pressed back or forwards
into the slot of the key and must remain there until it has reached the interior
of the lock where there is a groove which allows the bit to fall. Here the bit
swings out from the slot in order to lock or unlock the door. In order that a
square key pin & tube my be used the tubular key hole being square moves
round with the key in a second casing to turn in the lock inside the ordinary
case.
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Improvements in Keys and Keyholes for Door Locks.
CELESTINE RUBENS, 11, Barrow Road, Streatham Common, in the County of
Surrey, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement:-
This invention relates to means or appliances for locking doors and fastenings
of any description and is so constructed that locks thus fitted cannot be opened by
persons unprovided with the proper keys.
My invention is clearly represented in the annexed drawings.
Figure 1 sectional elevation of a door with a single tube and having my lock-
ing appliance in position after insertion through a tubular keyhole.
Figure 2 back elevation of the lock plate with the tubular keyhole in position.
Figure 3 sectional elevation similar to that shown at Figure I without the key
or locking device but with a front keyhole swing cover plate and a back keyhole
cover for independent motion by an appliance on the key.
Figure 4 back elevation of lock plate and the back cover swung clear of the
keyhole.

page_text: Figure 5 section of door with internal square shape of tubular keyhole and outer
tube or casing within which the inner tube can be rotated when the cover plates
are swung aside, said cover plates being pivotted from above.
Figure 6 section of door with internal square shape of keyhole and having the
outer casing tube with the keyhole tube turned for the cover plates to be clear
of the keyhole.
Figure 7 elevation of key showing the "bitt" enclosed.
Figure S similar elevation of key with bitt" exposed.
"
Figure 9 plan of key with bittenclosed in the slot in which it is pivotted.
The bitt" portion of the key in Figures 7, S, and 9, is of circular formation.
Figure 10 shows a similar key to Figure S. but of'square formation in its length,
and with the pivotted bitt" exposed.
Figure 11 part perspective elevation of a square tube shape of keyhole with an
end Hap folded up, and Figure 12 a similar view with the inner end flap folded
down.
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The same letters of reference apply to. all. the figures on the drawings.
Referring to Figure 1, A door. B, tubular keyhole fitted through same...
C, shoulder of tubular keyhole with incline D to guide bitt" E of key F
into its slot of the stem when the key has to be withdrawn, said "bitt" being
pivotted in the slot at G and free to fall when past the shoulder C on entry..
Referring to Figure 3, the back cover plate H is disconnected from the front,
or outside one I for separate movement by the key end, say, by a square (see
Figure 7) to be inserted into the cup J after the front cover plate 1 has been
swung sideways and thrown up clear of the hole.
The turning of the key will then overcome the frictional bite of the cup J and
will slew the back cover plate H clear for the key to be inserted sufficiently for
locking or unlocking the lock proper contained in the casing K.
According to Figure 5, the keyhole of the central tube B is square for a square
stemmed key (see Figures 9 and 10). The outside of this tube B is round to be
rotated in the second casing L by the key after insertion.
1.
This second casing L by its flange M has affixed to it a ring plate N to which
and to the flange M is pivotted the outer swing cover plate I which may be turned
up, as by the dotted lines. The back cover plate H remains over the back or
inner end of the keyhole and prevents a key being passed through to act upon
the lock, but if the flange M and ring plate N be turned for the back cover
plate H to fall clear of the keyhole, the front cover plate I falls also, as shown
at Figure 6, so that the key can be passed through for action on the lock.
To introduce the key into the keyhole, the bitt" E must be pressed back into
the slot G and it will keep its place in the slot whilst passing through the lock
until it reaches the incline of the shoulder C which allows it to fall into the
interior of the lock where it turns the locking apparatus as in an ordinary lock.
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Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what
I claim is:
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1. The combination of a square or equivalent shape of keyhole tube with an
outer casing both of which have independent turning action as and for the pur-
poses specified and substantially as represented.
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2. The employment of a tubular body as the keyhole of a door and of a key
having a "bitt" pivotted in a slot of the key stem, as and for the purpose speci-
fied and substantially as shown.
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