Lock. Page: 3 of 3
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321,306
key be then turned,the side 12,exterior to the supporting the stem of a key and shut off
recess or opening 4, passes into the opening 14 from the interior of the lock, and a key-aper-
of the key, permitting the ward-bit 9 with its ture upon its inner face only, substantially as 40
wards19 to operate upon the tumblers or bolt- described.
5 work of the lock. To withdraw thekey, the 2. A lock having-key-apertures 4 5 upon
reverse order of procedure is followed. its interior face only, and a recess, 2, in one
Of course the key just described will not edge, adapted to support the stem of the key,
operate the lock from the interior. When, substantially as described. 45
however, such lock is used upon a room-door 3. A key having a stem, a ward-bit, a bit
io where it is desired to secure the door from for connecting the ward-bit to the stem, and
either direction, it may be secured by a bolt recesses that separate the ward-bit and stem
or other device on its interior, or the same and the ward-bit and connecting-bit, said re-
lock may be used with a key similar in all re- cesses being arranged at an angle to each other, 50
spects, excepting that its stem or shank 18 is substantially as described.
15 in the reverse direction, as shown in Fig. 5, 4. A key having a stem, 18, a ward-bit, 9,
where the recess 8 separating the ward-bit of separated therefrom by a recess, 8, and a bit,
the key from the stem opens to the rear in- 10, connecting the ward-bit 9 to the stem 18,
stead of to the front. substantially as described. 55
It will be readily seen that in this construc- 5. The combination of a lock having a re-
20 tion of lock there is no opening onits exterior cess, 2, in one edge thereof, key-aperture 4 5
giving access thereto, whereby picking devices on the interior face only thereof, and a key
may be introduced therein or explosives forced having stem 18, ward-land 9, ward 10, and re-
to its interior; that its only opening for de- cess 8, adapted to control such lock, substan- 6o
vices to operate its bolt-work is placed on its tially as described.
25 interior, so as to be thoroughly guarded. Thus 6. The combination of a lock having a re-
I form a lock which is absolutely burglar- cess, 2, in one edge thereof, a key-aperture, 4
proof, so far as picking or tampering therewith 5, on the inner face only thereof, and a door,
with ordinary tools is concerned, or so far as 6, having key-aperture7, whose upper portion 65
explosive agents may be used to destroy it. registers with the recess, the remainder being
30 It is adapted for use in all connections where below or exterior to the lock-case, substan-
ordinary locks are used-house-doors, safes, tially as described.
vaults, &c.-and may be used with any form In testimony whereof I have affixed my sig-
or style of tumbler or bolt-work in the lock nature in presence of two witnesses.
and key for operating the same. THOMAS W. MARKHAM.
35 Having thus described my invention, what Witnesses:
I claim is- J. M. SMITHER,
1. A lock having a recess in its edge for H. J. BROWN.0
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Markham, Thomas W. Lock., patent, June 30, 1885; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth171011/m1/3/: accessed July 2, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.