IMPROVEMENTS IN LOCKS OR LATCHES
Year: 1885

page_text: We HARRY. WAKEFIELD, of Theodore Street, Lamp Manufacturer, and Alfred
CHARLES THOMAS, Designer, of 58 Lodge Road both of Birmingham, in the County
of Warwick, do hereby declare the nature of our Invention for "IMPROVEMENTS
IN LOCKS OR LATCHES," to be as follows:-
The class of lock or latch to which our invention is applicable is that which is
used for doors of houses and rooms where access can be had to both sides of the
door but where it is desirable that a person on one side of the door should be able
to so arrange the parts of the lock at his pleasure that the door might be fastened
and unfastened from the other side, or that the bolt might be held either withdrawn
when the door would be unfastened or protruded in which latter case the door
would remain fastened-We carry out our invention as follows:-
33
On the one side of the lock is an ordinary door handle knob having near its rim
the words "open
"shut" diametrically opposite to each other and the word
"free" intermediate between them the fourth space being left blank. When the
knob is turned so that the word "open" is uppermost the bolt is held withdrawn,
when the word "shut" is uppermost the bolt is held protruded and when the word
"free" is uppermost the bolt can be withdrawn or protruded by a slight ordinary
circular movement of the knob. Movement of the bolt by the knob at the other
side of the door can only be obtained when the lettered knob is set with the word
"free" uppermost and the knob at the other side does not control the lock in any
other way.
In the upper edge of the back part of the bolt I cut a semicircular notch and at
nearly the bottom of this notch is a small slot extending a little way down.
Fastened to the spindle of the lettered knob and moving with it is a plate
approximately semicircular in shape with the flat side of the semicircle upperinost.
In the lower part of this plate is a projecting pin which takes into the upper part
of the small slot before mentioned when the word "free" on the lettered knob is
uppermost, and works the bolt to and fro when a slight circular to and fro motion
is given to the lettered knob by a person's hand. When however the lettered knob
is turned so far in the direction requisite for withdrawing the bolt that the word
open" is uppermost the pin previously mentioned is by that time out of the slot
and against the nearly vertical side of the semicircular notch in the bolt there by
holding it in a withdrawn position. When on the contrary the lettered knob is
15
IPains 11

page_text: turned so far in the direction requisite for protruding the bolt that the word "shut"
is uppermost, the pin on the semicircular plate is out of the slot and against the
other nearly vertical side of the semicircular notch in the bolt thereby holding it
in its protruded position. I will now describe the means whereby the bolt is
withdrawn or protruded by means of the unlettered knob at the other side of the
door. On the same axis as that of the lettered knob is a square spin axle capable
of revolving freely about an axial centre line running in the direction of its length.
On this spindle and partaking of its movement of partial rotation are fixed another
nearly semicircular plate like the one fixed to the lettered knob, and also at the
end of the spin axle is fixed the, unlettered knob. The semicircular plate last
mentioned is placed with its flat side uppermost and it has a projecting pin which
works in the slot at the bottom of the semicircular notch in the bolt but below the
pin fastened to the plate in connection with the lettered knob. The action of the
pin on the bolt is precisely similar to that in connection with the lettered knob but
its action can only take place when the word "free in the lettered knob is
uppermost.
We employ a flat spring to act on the flat tops of the semicircular plates and
also a fixed guide in combination with a notch in the upper edge of the bolt.
. THOS KENDRICK.
Agent for Applicants.

page_text: We HARRY WAKEFIELD of Theodore Street Lamp Manufacturer, and ALFRED
CHARLES THOMAS of 58 Lodge Road, Designer, both of Birmingham in the County
of Warwick, do hereby declare the nature of our said invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:-
The class of lock or latch to which our Invention is applicable is that which is
used for doors of houses and rooms where access can be had to both sides of the
door, but where it is desirable that a person on one side of the door should be able
to so arrange the parts of the lock at his pleasure that the door might be fastened
and unfastened from the under side, or that the bolt might be held either withdrawn,
when the door would be unfastened or protruded in which latter case the door
would remain fastened.
We carry out our Invention as follows:-
"
On the one side of the lock is an ordinary door handle knob having near its rim
the words "open" "shut" diametrically opposite to each other and the word "free
intermediate between them, the fourth space being left blank-when the knob is
turned so that the word "open" is uppermost the bolt is held withdrawn, when
the word "shut" is uppermost the bolt is held protruded, and when the word "free"
is uppermost the bolt can be withdrawn or protruded by a slight ordinary circular
movement of the knob.
Movement of the bolt by the knob at the other side of the door can only be
obtained when the lettered knob is set with the word "free" uppermost and the
knob at the other side does not control the lock in any other way.
In the upper edge of the back part of the bolt we cut a semicircular notch, and
at nearly the bottom of this notch is a small slot extending a little way down-
fastened to the spindle of the lettered knob, and moving with it is a plate
approximately semicircular in shape with the flat side of the semicircle uppermost.
In the lower part of this plate is a projecting pin which takes into the upper part
of the small slot before mentioned-when the word "free" on the lettered knob is
uppermost, and works the bolt to and fro, when a slight circular to and fro motion
is given to the lettered knob by a persons hand. When however the lettered knob
is turued so far in the direction requisite for withdrawing the bolt, the word "open
is uppermost, the pin previously mentioned is by that time out of the slot and
against the other nearly vertical side of the semicircular notch in the bolt, thereby
holding it in its protruded position.
"
We will now describe the means whereby the bolt is withdrawn or protruded
by means of the unlettered knob at the other side of the door-On the same axis
as that of the lettered knob is a square spindle capable of revolving freely about an
axial centre line running in the direction of its length.
On this spindle, and partaking of its movement of partial rotation, is fixed another
nearly semicircular plate like the one fixed to the lettered knob, and also at the end
of the spindle is fixed the unlettered knob. The semicircular plate last mentioned

page_text: is placed with its flat side uppermost and it has a projecting pin which works in
the slot at the bottom of the semicircular notch in the bolt but below the pin
fastened to the plate in connection with the lettered knob.
The action of the pin on the bolt is precisely similar to that in connection with
the lettered knob, but its action can only take place when the word "free" on the
lettered knob is uppermost.
We employ a flat spring to act on the flat tops of the semicircular plates and
also a fixed guide in combination with a notch in the upper edge of the bolt.
And in order that this our said Invention may be more thoroughly understood
we will now proceed to describe it in connection with the accompanying sheets
of drawings.
Similar letters of reference denote similar parts in each figure where they occur.
Fig. 1 is an elevation of lock constructed according to our Invention in its free
position.
Fig. 2. Shews the lock being actuated.
Fig. 3. Shews the lock in its position when the door to which it is attached is
shut.
Fig. 4. Shews the lock in its position with the door open.
In each of the foregoing figures the cover plate is removed to shew the parts
below and the knob is for the sake of clearness omitted in Fig. 2.
Fig. 5. Shews the bolt in elevation and plan.
Fig. 6. Shews the semicircular plate which is attached to the unlettered knob in
elevation and plan.
Fig. 7 Shews the semicircular plate attached to the lettered knob in elevation
and plan.
Fig. 8. Is a back and side view of the lettered knob.
Fig. 9. Is a front view of same.
Fig. 10. Is a plan of the lock and part of the door on a small scale.
"
In Figures 1. 3. 4. 8. 9-a is a lettered knob, that is, it has the words "free
" open ""shut" or their equivalent on it. It is attached to the door by screws passing
through holes a Fig. 8, in a plate a¹ in which the knob revolves. We may
omit
the lettering on the knob in cases where it is desirable to do so. a is a projecting
square to fit in the square recess d², of the semicircular plate d; by this squaro
recess and projection the plate d is actuated. The words "shut "" free 'open are
placed in the position shewn at a*. The unlettered knob b, Fig. 10. resembles the
lettered knob in all respects except the lettering and is attached to its plate e, in
a similar manner. c, is a bolt having an approximately semicircular recess c¹, the
sides of which are marked c and c with a slot c² at the bottom of it and a notch c³
to work on the guide h. d is a plate approximately semicircular in its shapo
having a square recess d², on one side of it and a projecting pin d' on the other
side. This plate d is attached to the lettered knob a, in the manner before
described. e, is a plate of the same shape as d, with a projecting pin e', and a
square recess e* for attaching to the unlettered knob b. f is a flat spring which
presses on the straight edges of the plates d and e. g, is the case of the lock, and h
is a square guide pin which works in a notch c³ of the bolt c. When the parts of
the lock are in the position shewn in Fig. 1. with the word "free" on the lettered
knob uppermost the bolt can be withdrawn by the ordinary means of the circular
movement of the knob in the direction of the arrow as shewn in Fig. 2. The
pin d pressing against the side c' of the notch c¹ in the bolt c, withdraws it.
By continued turning of the lettered knob in the same direction it is brought to
the position shewn in Fig. 4, where the pin d presses against the nearly vertical
side c, of the notch c'-thus holding the bolt c, back, the word "open" on the lettered
knob is then uppermost as shewn. If, on the contrary it is desired to fasten the
door, the lettered knob is turned in the opposite direction as shown in Fig. 3, when
the pin d¹ comes against the nearly vertical side c of the bolt and prevents its
being withdrawn-The bolt may be withdrawn or protruded by the unlettered
knob bacting on the plate e, which has a pin e' which works in the slot c² below

page_text: the pin d. Its action on the bolt is similar to that of d¹ so far as withdrawing and
protruding the bolt is concerned but it cannot lock it in either position as the
pin d does.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed we declare that what
we claim is:-
1st The construction of a lock or latch with two nearly semicircular plates
provided with pins actuating the bolt by means of a suitably shaped notch and
slot the one plate being actuated by the lettered knob on one side the door to
which the lock is attached and the other plate by the knob on the other side of
the door as shewn on the accompanying drawing.
2nd The construction of lock or latch by which the plate actuated by the
"lettered knob " not only moves the bolt to and fro, but by a further movement
locks or fastens the bolt either in or out as desired and as shewn by Figs. 3 and 4
on the accompanying drawing.
3rd The general construction combination and arrangement of parts forming a
lock or latch, the bolt of which may be withdrawn or protruded by a knob on each
side of the door to which it is attached but which bolt may be only "locked" either
in or out by the knob herein before called the "lettered knob" on one side the door
only, all as described in the foregoing Specification and shewn on the accompanying
drawings.