IMPROVEMENTS IN LOCKS
Year: 1851

page_text: GEORGE
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, Charles
DISMORE, of Clerkenwell Green, in the County of Middlesex, send
greeting.
George
George
George
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Royal Letters Patent, under the Great Seal of the United Kingdom of Great
Britain and Ireland, bearing date at Westminster, the Fourth day of
November, One thousand eight hundred and fifty-one, in the fifteenth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said Charles Dismore, my exors, adñors, and assigns, Her especial
licence, full power, sole privilege and authority, that I, the said Charles
Dismore, my exors, adññors, and assigns, or such others as I, the said Charles
Dismore, my exors, adiñors, 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
"IMPROVEMENTS IN LOCKS;" in which said Letters Patent is contained a proviso,
that I, the said Charles Dismore,shall cause a particular description ofthenature
of my said Invention, and in what manner the same is to be performed, by an
instrument in writing under my hand and seal, to be enrolled in Her said
Majesty's High Court of Chancery within six calendar months next and imme-
diately 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.
George

page_text: George
NOW KNOW YE, that in compliance with the said proviso, I, the said
Charles Dismore, do hereby declare that the nature of my Invention, and the
manner of performing the same, are fully described and ascertained in and
by the following statement thereof, reference being had to the Drawings
hereunto annexed, and to the figures and letters marked thereon, that is
to say :-
My Invention consists of the improvements in locks hereafter described.
DESCRIPTION OF THE DRAWINGS.
Figure 1 shows an end view of a lock constructed with some of my
improvements. Figure 2 is an interior view of the lock. Figure 3 shows an
interior view of the box which covers the works. Figure 4 shows the same
view less the circular plate e, seen in the previous Figure. Figure 5 shows
two views of the rotating tube through which the key is introduced into the
lock, and I would state that I am aware that tubular openings for the passage
of a key to the interior of locks have before been employed, but according
to the arrangements shown in the Drawings, the tube a is formed with an
enlargement or boss b, which rotates within the projecting cylinder c, and it
has fixed on it a spring d, which at its bent pointed end springs into a notch,
and retains the parts in a correct position for the introduction of the key, and
in addition to these parts there is a fixed plate e, which I prefer to be of
steel, through which there are two openings, the one for the key to'pass into the
lock, and the other for it to pass outat, and f' is a stop to the key, so as to prevent
its passing beyond the correct position. Figure 6 shows an interior view,
a side section, an exterior view, and a side exterior view of the cylinder c.
Figure 7 shows different views of the tube a and parts combined therewith;
and Figure 8 shows an edge view, a section, and flat view of the fixed plate o,
and it will readily be understood that the combination of the parts a, b, c, d, e,
which constitutes a peculiarity in this lock, will offer considerable security to
locks to which the same may be applied. Figure 9 shows a striker plate
suitable for this arrangement of lock. In the arrangement of lock shown, the
bolt
is shot by means of the spring 9, when permitted to do so, by the
catch being out of the way, and it will at all times in shutting the door be
lifted by means of the incline in the sticker plate j, and on the other hand
the bolt will be held back by the catch h, when the door to which such a lock
is fastened is opened.
The bolt is so arranged that it may be opened on one side by a key, suitably
formed according to the tumblers or wards, or such like parts used in the
particular lock to which my improvements are applied and to the arrangement

page_text: of which tumblers, wards, and such like parts I make no claim. The key,
for this particular arrangement, is shown separately in the Drawings, and the
lock may be opened on the other side of the door by a handle on the spindle 2,
which by its bit m acts on the lever », the face of which comes against the
tail ends of the tumblers o, which are to be properly formed to be acted on by
the face of the lever », so as to move them into position to allow the bolt to
come back, which it will do by means of the bit m on the pin 7, pressing
against the lever n, which lever n acts as a fulcrum and causes the pin / to be
moved back, and consequently the bolt. Figure 10 shows an exterior view of
the cylinder c; Figure 11, a transverse section; Figure 12, a front view of a
boss b; Figure 13, a transverse section of a boss b; Figure 14 is a back
view of the boss ; Figure 15 shows a section of these parts combined with
a key, introduced to turn the boss; this arrangement of part of my improve-
ments is suitable for a large lock not shown, and which requires a large key.
In order that the "bit" end of the key, which can be separated from the
stem, as shewn, is first introduced into the key-hole, the stem of the key is
then detached from it leaving the "bit " in the lock; the stem is then inserted
into the key-hole at a, and by turning the boss thereby, the "bit" of the
key is carried round and caused to act upon the tumblers and bolt of the
lock to lock it. Figure 16 shows different views of the key. I would remark
that the form of the "bit" of the key, and, consequently, the tumblers, wards,
and such like parts, may be varied, and the key shown is simply for illustra-
tion. The convenience offered by thus having the "bit" of the key separate
from the stem will readily be understood, particularly in regard to large keys,
as it admits of the "bit" end being more conveniently carried about the
person whilst the stem may be kept in any convenient place, the possession of
the stem only of the key by any person giving no means of opening the
lock.
Having thus described the nature of my Invention and the manner of
performing the same, I would have it understood that I do not confine myself
to the details herein described, as my improvements may be applied to other
forms or arrangements of locks. But what I claim are the improvements
herein described.
George
In witness whereof, 1, the said Charles Dismore, have hereunto set my
hand and seal, this Fourth day of May, in the year of our Lord One
thousand eight hundred and fifty-two.
GEORGE (1.s.) DISMORE.

page_text: JEFFERSON.
AND BE IT REMEMBERED, that on the Fourth day of May, in the year
George
of our Lord, 1852, the aforesaid Charles Dismore 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.
Enrolled the Fourth day of May, in the year of our Lord One thousand

page_text: Upon the Petition of George Dismore, of Clerkenwell Green, in the County
of Middlesex, on the 26th day of July 1843, preferred unto the Right Honble
the Master of the Rolls, it was alleged that William Carpmael was employed
by said George Dismore to obtain for him Letters Patent for "Improvements
in Locks," to exercise the same within England, Wales, and the Town of
Berwick-upon-Tweed, for the term therein mentioned:
That the said William Carpmael did so obtain the said Letters Patent,
bearing date at Westminster, the 4th day of November 1851, for the said
Invention:
That one of the provisoes contained in the said Letters Patent was that the
said George Dismore should inrol a Specification of the said Invention, and in
what manner the same was to be performed, in the High Court of Chancery
within six calendar months next and immediately after the date of the said
Letters Patent:
That a Specification was accordingly prepared and ingrossed by the said
William Carpmael, and executed and acknowledged by the said George
Dismore, on the 4th day of May 1852, and inrolled on the same day in the
Inrolment Office of the Court of Chancery:
That at the foot of the said Specification the Petitioner signed his name
correctly, viz", "George Dismore," as by reference to the said Specification
will appear:
That after inrolment had taken place, the said George Dismore discovered
that the stationer of the said William Carpmael, viz, Benedict Gobey, of
12, Cursitor Street, Chancery Lane, had throughout the said Specification, by
mistake, inserted the Christian name "Charles," instead of the Christian name
"George" ":
It was therefore prayed, and Her Majesty's Attorney-General having sub-
scribed the said petition, thereby signifying his consent to the prayer thereof
on behalf of the Crown, and upon reading the affidavits of said George Dismore,
William Carpmael, and Benedict Gobey, filed 26th July 1853, it is accord-
ingly ordered, that the proper Officer do attend his Honor with the Record
of the inrolment of the Petitioner's aforesaid Specification, and that the same

page_text: be altered and amended by inserting the name "George," in lieu of the name
"Charles," in the Record of the Specification so inrolled, as in the Specification
mentioned. And it is ordered that a copy of this order be indorsed on the
Roll on which the said Specification is inrolled:
Therefore, on the Fifteenth day of June, in the year of our Lord 1854,
the alterations and amendments aforesaid were made accordingly.