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199,S79
one piece, and is attached to the sill by bolts
m, and to the top beam by bolts m', the heads
of the bolts being in recesses, so as to allow
the door N to close tightly in the frame; and
when the door is closed it covers up the bolt-
heads. The dooris constructed of sections G,
substantiallylike those of which the walls are
formed.
The sides N' of the doors are formed to fit
the sides of the doorway, and are hollow, to
contain the head and. nut of the horizontal
bolts I, the latter being reached by a socket-
wrench, inserted through a hole in the side
piece N', said holes being closed when the door
is shut; or they may be permanently stopped
in any suitable way.
I claim herein as new and of my invention-
i. The walls for jail-cells formed of vertical
sections (, secured together by through-bolts
I, substantially as set forth.
2. In combination with the bolts I and sec-
tions -, the transverse tubular bars for the
concealment of the bolts, as set forth.
3. The jail-cell constructed of the cast see-
tions G, through-bolts I, and corner-posts II,
and sill and head timbers K, substantially as
set forth.
4. The lining of the ouenter or main walls of
jails with sheet-iron, in connection with the
narrow windows, lined with chilled cast-iron,
substantially as set forth.
JOHN S. THOMAS.
Witnesses:
I3. I. ELLIOTT,
I W. T. STEELE.