CERTAIN ADDITIONS TO LOCKS OR FASTENINGS FOR DOORS OF BUILD- INGS, AND OF CABINETS, AND FOR DRAWERS, CHESTS, OR OTHER RECEPTACLES, FOR THE PURPOSE OF AFFORDING GREATER SECURITY AGAINST INTRUSION BY MEANS OF KEYS IMPROPERLY OBTAINED
Year: 1838

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, SALLY
THOMPSON, of Upper North Place, Gray's Inn Road, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Letters Patent under the Great Seal of Great Britain, bearing date at West-
minster, the Thirteenth day of November, in the second year of Her reign, did,
for Herself, Her heirs and successors, give and grant unto me, the said Sally
Thompson, Her especial license, full power, sole privilege and authority, that
I, the said Sally Thompson, my exors, adñors, and assigns, or such others as
I, the said Sally Thompson, my exors, adññiors, or assigns, should at any time
agree with, and no others, from time to time and at all times during the term
of years therein expressed, should and lawfully might make, use, exercise, and
vend, within England, Wales, and the Town of Berwick-upon-Tweed, my
Invention of "CERTAIN ADDITIONS TO LOCKS OR FASTENINGS FOR DOORS OF BUILD-
INGS, AND OF CABINETS, AND FOR DRAWERS, CHESTS, OR OTHER RECEPTACLES, FOR
THE PURPOSE OF AFFORDING GREATER SECURITY AGAINST INTRUSION BY MEANS OF
KEYS IMPROPERLY OBTAINED;" in which said Letters Patent is contained a proviso
that I, the said Sally Thompson, shall cause a particular description of the
nature of my said Invention, and in what manner the same is to be performed,
to be inrolled in Her said Majesty's High Court of Chancery within six calendar
months next and immediately after the date of the said in part recited Letters
Patent, as in and by the same, reference being thereunto had, will more fully
and at large appear.

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said Sally
Thompson, do hereby declare that my said Invention, and the manner in which
the same is to be carried into effect, are set forth and explained in the following
description thereof, reference being had to the Drawings hereunto annexed,
and to the figures and letters thereon marked, in correspondence with the
figures and letters herein contained, that is to say:
My Invention is applicable to the setting in motion of an alarum before any
key can be introdued into the lock or fastening, or before the bolt can be
withdrawn, and I accomplish this object,
Firstly, by placing before the keyhole of the lock or fastening a plate forming
a shutter to the keyhole, to be removed by being slidden away or being turned
on an axis before the key can be introduced into the lock, which shutter
shall be in communication with an alarum produced by the vibration of a bell
or other sonorous body situated either within the lock or contiguous to it or in
a room or place to which the motion may be conveyed.
And secondly, by forming a communication from the bolt of a lock to a
sounding body, so that the motion of the bolt in being withdrawn shall cause
a sound, or a succession of sounds to be given at such place, within practicable
distance, as the proprietor of the lock shall determine upon.
These, the principles of my Invention, admit of being carried into effect
according to local and other circumstances, in a great variety of forms and
modifications, of which those shewn in the Drawings and hereinafter described
are given as samples, and afford sufficient information to any competent
locksmith to enable him to carry the Invention into effect as variously
formed as he pleases, and in as beneficial a manner as I myself can perform
the same.
DESCRIPTION OF THE DRAWINGS.
Figure 1, a view of the inner side of a lock with the addition of a sliding
shutter to cover the keyhole at pleasure, as seen when complete and ready
to be screwed on to a door. Figure 2, the inner side of a similar lock but
with a revolving shutter. Figure 3, the appearance of the works in the
interior of the lock when the shutter and the plate upon which the
shutter slides or revolves are removed. Figure 4, a view of the back end
of the lock, (Figures 1 and 3), with the spindle and return plate as
seen beyond the end. Figure 5, horizontal section from A and B of
Figures 1 and 8, with the bolt removed to allow the works below the
section to be more distinctly represented. Figure 6, the key of the lock,

page_text: with a prolongation for turning the spindle, carrying the pinions which move
the shutter, and communicate motion to the sounding body.
The same
letters of reference signify the same parts in all the Figures. a, the frame
or case to which the works are affixed; b, the return plate at the front end of
the lock, which is let in and screwed to the front edge of the door; c, the
ordinary bolt of the lock; d, a screw fixed in the frame of the lock, upon
which a slot in the bolt slides; e, the ordinary sliding spring latch; f, the spring
and lever to throw out the latch; g; the ordinary system of wards; h, the
double lever for sliding back the latch, having the usual square hole to receive
the stem of the handles; k, the inner plate, commonly called the cap plate,
inclosing the works of the lock; l, the sliding shutter, having a toothed rack
formed along the under edge, extending nearly from end to end; m, a dove-
tailed piece sliding in a groove sunk in the plate k, to which dovetailed piece.
the sliding shutter is secured by two screws n; the two screws holding the
sliding shutter to the dovetailed piece; p, the revolving shutter, having teeth
nearly all around its periphery; 9, a stud fixed in the plate k, upon which
the revolving shutter turns; r, a toothed pinion, by which the sliding shutter
is moved longitudinally, or the revolving shutter turned on its axis; s, a
spindle turning in the outer plate of the case a, and inner or cap plate k,
having an aperture in each end of a square figure, into which a prolongation
of the key is made to fit. This aperture may be of a triangular or other.
shape at pleasure; t, the ordinary key, having a prolongation of the stem to
fit the aperture of the spindle 's, and by it to turn the pinions which move the
shutters, and apparatus for communicating motion to the alarum; t¹, the
prolongation; u, a pinion fixed on the spindle s, inside the plate k, for moving
a bent lever or crank v; v, the bent lever or crank; w, the fulcrum of the
crank; x, the short-arm of the lever for receiving motion from the pinion u;
y, the long arm of the lever for communicating motion to the alarum; z, a
link hinged to the long arm y, to lead towards the alarum; ¹, a box con-
taining a spiral spring, represented by dotted lines in Figure 3, which spring:
returns the crank to its stationary situation, as shewn in the Drawings, after
the pinion u has moved the crank to the left; this spring is of the same construc-
tion as those used for the closing of candle snuffers; ", a spring for returning
the crank to its stationary situation. after the pinion u has moved it to the right.
Figure 7 represents a door lock, in which the communication with the
alarum is made from the main bolt, instead of from a pinion, in which case
the shutter is dispensed with. a, the main bolt, having four throws and four
ratchet teeth to move the lever and ring the bell at every turn of the key.

page_text: In this case it will be advisable to make the key with a short bit, in order
that there may be the more power to ring the bell. b, the lever, which is
here represented straight, except as to two shoulders, against which the
springs act; c, the fulcrum of the lever; d, the short arm, moved by the
ratchet teeth of the bolt; e, the long arm, giving longitudinal motion to the
linkff, the link to lead the motion towards the alarum; g, two springs,
counteracting each other, to hold the lever stationary when not turned aside
by the ratchet teeth; h, two studs for abutments to the springs. It is obvious
that the lever may be made either straight or at such an angle as the direc-
tion of the alarum shall require.
And I hereby further declare that I contemplate the application of my
Invention to the forming of a communication, in the manner herein-before
shewn, from all the locks in the business rooms of a banker, merchant, or
other party, with one alarum, or with several separate bells, placed in the
bedroom of the confidential resident. The modes of forming such communi-
cations are too familiar with locksmiths and bellhangers to need any descrip-
tion. It will be quite unnecessary to shew the application of my Invention
to a door latch, a drawer lock, a chest lock, a cupboard lock, a cabinet lock,
or any other lock, as the variations will only have to be made in respect to
form, size, and localities, the principles remaining the same, as before de-
scribed.
And I hereby further declare that I do not claim as my Invention those
common parts of a lock shown at a, b, c, d, e, f, g, h, and k, Figures 1, 2, 3, 4,
and 5, such parts being placed in the Drawings merely to elucidate my Inven-
tion, and distinguish the relative situations of the new and the old parts.
But I do claim the application, before the keyhole, of a lock or fastening of a
covering plate or shutter in communication with an alarum, so arranged that
the shutter cannot be removed from before the keyhole without the alarum
being at the same time sounded either in the lock or contiguous to it, or at
any practicable distance, at the pleasure of the proprietor.
And I do claim the means of communicating motion from the bolt of a
lock or fastening to an alarum placed in any convenient situation, as herein-
before particularly shewn and described.
In witness whereof, I, the said Sally Thompson, have hereunto set my
hand and seal, this First day of May, One thousand eight hundred and
SALLY (L.S.) THOMPSON.

page_text: AND BE IT REMEMBERED, that on the First day of May, in the
year of our Lord 1839, the aforesaid Sally Thompson came before our
said Lady the Queen in Her Chancery, and acknowledged the Specification
aforesaid, and all and every thing therein contained and specified, in form
above written. And also the Specification aforesaid was stamped according
to the tenor of the Statute made for that purpose.
Inrolled the Fourth day of May, in the year of our Lord One thousand