IMPROVEMENTS IN LOCKS
Year: 1879

page_text: LETTERS PATENT to Jonathan Barlow, of 6, 7, and 8, Queen Street, Oxford
Street, in the County of Middlesex, Coach Ironmonger, for the Invention of
"IMPROVEMENTS IN LOCKS."
Sealed the 15th August 1879, and dated the 22nd February 1879.
PROVISIONAL SPECIFICATION left by the said Jonathan Barlow at the
Office of the Commissioners of Patents on the 22nd February 1879.
JONATHAN BARLOW, of 6, 7, and 8, Queen Street, Oxford Street, in the County
of Middlesex, Coach Ironmonger. "IMPROVEMENTS IN LOCKS."
This Invention consists in improvements in locks applicable for railway and other
carriage doors, room doors, and other doors requiring a fastening, the improvements
relating particularly to that class of locks having a vertical bolt, the object of tho
improvements being to obtain an easy and nearly noiseless closing and opening of
the doors to which these locks are applied.
I will first describe my Invention as arranged for an edge lock for carriage doors.
I employ a strong metal foundation plate, in which I cut a vertical groove or slide
in which works the bolt.
This bolt is formed with one or more cams or projections, against which work
one or more lever handles, by pressing down which the bolt can be depressed and
the lock opened when required either from the outside or the inside of the door, or
from both.
Suitable springs are provided and applied either to the bolt or the hereinbefore
described levers, or to both, in order to carry the parts back to their normal
positions when the lever handles are released; and the bolt is provided with a
wedge shaped and slotted projection which is clear of the lock, such projection,
when the door is closed, striking against and sliding easily into a suitable striking
plate recessed so as to correspond in shape with the said projection on the bolt,
such striking plate being fixed into the pillar or door jamb. The foundation plate
is formed with a return edge or rim. A safety bolt may be provided, if required,

page_text: so that the door may be locked either on the inside or outside; or in the case of
landaus and other open carriages I adapt any suitable known arrangement for
preventing the door being opened until the glass is lowered to the bottom of the
door case.
The improvements are also applicable to edge locks for room doors, and to rim
and face locks, a key being provided to fasten the bolt so as to prevent the lever
or levers being moved. When this Invention is applied to rim or face locks the
lever or levers is or are cranked so that the lock may be opened by turning the
handle or handles instead of by pressing them down as herein before described.
These improvements may also be applied to locks with spindles to turn round
instead of with levers to depress.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Jonathan Barlow in the Great Seal Patent Office on the 22nd August
1879.
JONATHAN BARLOW, of 6, 7, and 8, Queen Street, Oxford Street, in the County
of Middlesex, Coach Ironmonger. "IMPROVEMENTS IN LOCKS."
This Invention consists in improvements in locks applicable for railway and
other carriage doors, room doors, and other doors requiring a fastening, the im-
provements relating particularly to that class of locks having a vertical bolt, the
object of the improvements being to obtain an easy and nearly noiseless closing.
and opening of the doors to which these locks are applied.
I will first describe my Invention as arranged for an edge lock for carriage doors.
I employ a metal foundation plate, in which I cut a vertical groove or slide, in
which works the bolt. This bolt is formed with one or more cams or projections,
against which work one or more lever handles, by pressing down which the bolt
can be depressed, and the lock opened when required either from the outside or the
inside of the door or from both.
Suitable springs are provided and applied either to the bolt or the hereinbefore
described levers or cams, or to both, in order to carry the parts back to their
normal positions when the lever handles are released; and the bolt is provided
with a wedge shaped and notched projection which is clear of the lock, such pro-
jection when the door is closed striking against and sliding easily into a suitable
striking plate recessed so as to correspond in shape with the said projection on
the bolt, such striking plate being fixed into the pillar or door jamb, the
foundation plate is formed with a return edge or rin, or instead of the bolt
having a projection it may be recessed, the striking plate in this case being
formed with a corresponding projection. A safety bolt may be provided if
required, so that the door may be locked either on the inside or outside; or in the
case of landaus and other open carriages I.adapt any suitable known arrangement
for preventing the door being opened until the glass is lowered to the bottom
of the door case.
The improvements are also applicable to edge locks for room and other doors,
and to rim and face locks, a key being provided to fasten the bolt so as to
prevent the lever or levers being moved. When this Invention is applied to rim
or face locks the lever or levers may be arranged so that the lock may be opened
by turning the handle or handles instead of by pressing them down as hereinbefore
described.
But to make my Invention better understood I will proceed to describe the
same by reference to the accompanying Drawing, in which Figure 1 is a side view
of an edge lock for a carriage door constructed according to my Invention, the
covering plate being removed to shew the arrangement of the parts which are
supposed to be in their normal positions; Figure 2 is an edge view of the same;
Figure 3 is a side view shewing the bolt depressed; Figure 4, view of the
striking plate; Figure 5, front view of a rim or face lock for a room or other door;
Figure 6, end view of same; Figure 7, front view shewing the bolt raised; Figure 8,
view of the striking plate.
I will first describe the lock shewn in Figures 1, 2, 3, and 4.
a is the metal foundation plate; b, the vertical groove or slide in the same in
which works the bolt c; d is a cam or projection on the bolt; e and f are the
levers of the handles for operating the bolt, the said levers being pivotted at g and h
respectively; i is a spring, the end of which bears against the underside of the cam
d for bringing the parts back to their normal position; j is a spring placed between
the levers e and f; k, guide pin moving in a slot in the upper lever e; m is the
wedge shaped and notched projection on the bolt c; n is the recess in the lock
plate o, the said recess corresponding in shape to that of the projection m.
A lock of this construction being fixed to a carriage door, and the striking plate

page_text: being fixed in the pillar or door jamb, it will be understood that if the door be
closed or slammed the wedge shaped end of the projection m coming against the upper
part of the recess n in the striking plate o, the bolt c of the lock will be depressed
until the vertical part of the projection m passes the corresponding vertical part of
the recess n, when the bolt will be raised by its spring i, and the door will be
secured. To open the door either from the inside or outside it will be merely
necessary to depress either the inner or other handle which will depress the bolt
into the position shewn in Figure 3; and thus allow the projection m of the bolt
to pass out of the recess n in the striking plate o, and the door may then be
opened.
The lock may be provided with any suitable safety bolt to allow of the door
being locked either from the inside or from the outside, as required.
In Figures 5, 6, 7, and 8 a is the lock plate; c is the bolt formed with slides b
and 6 moving in guides 6 and 65; m is the projection on the bolt; i is the spring;
d is à central rotating boss with a projection fon each side for raising the bolt as
hereinafter described; e is a square hole in the boss d for receiving the usual
square spindle carrying the nobs or handles; o is the striking plate; n; the
recess in the same.
By this arrangement it will be seen that if the spindle of the lock be turned the
boss & turning with it will raise the bolt c by means of the projection f, as shown
in Figure 7, and thus raise the projection m so as to allow it to be moved out of
the recess n in the striking plate o, and so permit the door to be opened. The
handle being then released the parts will be carried back to their normal position
by the spring i. To close the door it is nierely necessary to push it to, when the
bolt will be raised in a manner similar to that hereinbefore described in referring
to the carriage door lock.
.
I would here remark that one of the advantages of this construction of lock is
that if the spring i should break the bolt would fall into its normal position by its
own weight, so that the lock would still act, and this remark equally applies to the
carriage door lock which could be arranged to act in a similar manner by simply
reversing the levers and the projection m of the bolt.
Instead of the face or rim lock being operated by means of a square spindle as
described and shewn in the Drawing it will be understood that the bolt may be
operated by depressing the knobs or handles by simply altering the arrangement
of the levers.
Where required, a key and bolt (not shown in the Drawing) are provided for
locking the bolt o.
Instead of the projection being formed on the bolt, as shewn in the Drawing, the
striking plate may be formed with a projection, a corresponding recess being formed
in the holt.
Having thus described my Invention and the manner of carrying the same into
effect, I would have it understood that I do not confine myself to the precise details
herein laid down and shewn in the Drawing, as the same may be varied without
departing from the peculiar character of the Invention, but what I do claim is,―-
The construction and employment of locks with vertical bolts arranged and
operating substantially in the manner and for the purposes herein before described;
and represented in the accompanying Drawing, or any mere modification thereof.
In witness whereof, I, the said Jonathan Barlow, have hereto set my
hand and seal, this Twenty second day of August, in the year of our Lord
One thousand eight hundred and seventy nine.
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