Lock. INSTRUMENT, OR MACHINE WITH ONE TRICKER OR BOLT, WHEREBY BOTH LOCKS OF A DOUBLE BARREL GUN, TOL, OR BLUNDERBUSS, AND ALL OTHER FIRE-ARMS OF DOUBLE BARRELS, WITH TWO LOCKS AFFIXED THERETO, ARE MAY TRICKER OR BO, WITH THE
Year: 1794

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
THOMAS SYKES, of Sheffield, in the County of York, Silversmith and
Gunsmith, send greeting.
WHEREAS His most Excellent Majesty King George the Third,
by His Royal Letter Patent under the Great Seal of Great Britain,
bearing the Fourth day of February last, in the thirty-fourth year of
His reign, did give and grant unto, me, the said Thomas Sykes, my
executors, administrators, and assigns, His special licence, full power,
sole priviledge and authority, that I, the said Thomas Sykes, my
exccutors, administrators, and assigns, and every of them, by myself
and themselves, or by. my and their deputy, and deputies, servants or
agents, or such others as I, the said Thomas Sykes, my executors,
administrators, and assigns, should agree with, and no others, from time
to time and at all times thereafter, during the term of years therein
expressed, should and lawfully might make, use, exercise, and venu.
within that part of Great Britain called England, Flis Dominion of
Wales, and Town of Barwick upon Tweed, my Invention of "A Lock.
INSTRUMENT, OR MACHINE WITH ONE TRICKER OR BOLT, WHEREBY BOTH
LOCKS OF A DOUBLE BARREL GUN, PISTOL, OR BLUNDERBUSS, AND ALL OTHER
FIRE-ARMS OF DOUBLE BARRELS, WITH TWO LOCKS AFFIXED THERETO, ARE
AND MAY BE FIRED, THE ONE AFTER THE OTHER, OR ONE ALONE, BY THE SAID
ONE TRICKER OR BOLT, WITHOUT THE SIDE MOTION OR ALTERATION OF THE

page_text: POSITION OF THE SAID TRICKER, OR OTHER INCONVENIENCE ATTENDING THE
SAME," in such manner as to me; the said Thomas Sykes, my executors:
administrators, or assigns, or any of them, should in their discretion
seem meet; and that T, the said Thomas Sykes, my excentors, admi-
nistrators, and assigns, should, and lawfully might have and enjoy the
whole profit, benefit, commodity, and advantage, from time to time
coming, growing, and arising by reason of the said Invention, for and
during the term of years therein mentioned; to have, hold, exercise,
an enjoy the said lysence, powers, privileges, and advantages therein-
before granted or mentioned to be granted unto me, the said Thomas
Sykes, my executors, administrators, and assigns, for and during and
unto the full end and term of fourteen years from the date of the said
Letters Patent next and immediately ensuing, and fully to be compleat
and ended, according to the Statute in that ease made and provided;
in which said Letters Patent there is contained a proviso, obliging me,
the said Thomas Sykes, by an instrument in writing under my hand
and seal, to cause particular description of the nature of my said
Invention, and in what manner the same is to be performed, to be
inrolled in Flis Majesty's High Court of Chancery within one calendar
month next and immediately after the date of the said Letters Patent.
as in and by the same, relation being thereunto had, more fully and at
large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the
said Thomas Sykes, do hereby declare that the parchment writing here-
unto annexed, marked with the letter A, contains a true and particular
description of my said new invented lock, instrument, or machine.
divided into four distinct Drawings, and that the several methods in
and by which my said Invention is to be performed, is herein-after
particularly set forth (that is to say):
The Drawing marked with the Figure 1-The letter A, the trigger
plate; B, the trigger; C, the slide; D, the pivit, which screws into the
round hole of C, the slide, that slides betwixt the uprights G, G, that is
fixed firm on each side of the square hole of A, the trigger plate, one is
solid to the plate, and the other is screwed to in order to admit the
pivit and slide betwixt; I, the hook, that is fixed either to the spring
or to the tumbler inside of the lock or locks, so that when the cock or

page_text: cocks is cocked bears against one end of the leaver E, and the other
end pushes the pivit and slide D, C, from one dog tail to the other;
and F, the spring bearing against one end of D. the pivit returns it
back, so that when both the cocks is is cocked will let of one lock after
the other or one alone, by the pull of the finger as a single gun; B, the
trigger has a roller in, which plugs against the slide C, to bear it up
when it is against the dog tail or the sear to let it off'; II, the briddle
that goes over E, the leaver, to keep it steady. The Drawing marked
with the Figure 2:"-Letter A, the trigger plate; B, the trigger; C.
the pivit, that screws into the hole of B, the trigger, that slides betwixt
D, D, the uprights, that is fixed on each side of square hole of trigger
plate, one is solid to the plate, and the other is screwed to in order to
admit C, the pivit and B, the trigger betwixt, that slides from one
logtail to the other; II, the hook that is fixed to the lock or locks, so
that by the motion of the lock or locks plays upon one end of E, the
leaver, and the other end pushes C, B, the pivit and trigger from one
dogtail to the other, so that it acts the same with the, finger as a
common gun; G, the spring bearing against the other end of C, tlic
pivit returns it back, so that when both locks are cocked will let off one
after the other, or one alone; F, the briddle that goes over E, the
leaver to keep it steady; the trigger slides through the square hole
in the trigger plate. The Drawing marked with the Figure 3":―A,
the trigger plate; B, the trigger; C, the slide, that slides upon B, the
trigger; D, D, the uprights that are fixed solid on each side of the
oblong hole in the trigger plate; G, the upper standard that is screwed
firm to the trigger plate that F, the leaver works on; II, the nut that
Screws on G, the upright, after F, the leaver is put on. B, the trigger
swings betwixt D, D, the uprights, upon a small screw; and C, the slide
works прои
the round end of B, the trigger. I, is the nut that keeps C,
the slide steady when it is on the round end of B, the trigger; J, is
the spring that screws to B, the trigger, and laps round to push against
C. the slide, so that when E, the hook, from the motion of the lock or
locks, bears against the end of F, the leaver, and the other end, which
has a roller in, bears against C, the slides, which has also a roller in,
that meets the one in leaver F, and leaver F pushes C, the slide from

page_text: one dog tail or scar to the other, so that when both locks are cocked,
will let off one lock after the other, or one alone.
The Drawing
marked with the Figure 4-A, the trigger plate; B, the trigger; C,
the hook; D, the front view of trigger, which is double webbed, one
side for left hand lock, and the other for the right hand lock; E, the
slide to which D, is fixed with a joint, so that when the lock or locks is
cocked, C. the hook bears against the fint end of E, the slide, and
pushes D, to take one dogtail or sear, which lets the locks or locks of
and misses the other; F, the spring returns it, so that when both locks
are cocked will let one lock of after the other, or one alone; H, the
briddle that is screwed over the slide E, to the trigger plate; G. the
bearer, which is solid to the trigger plate for B. the trigger to work in;
HI, are the sear or dog tails to shew the nature of the trigger, taking
one dog tail and missing the other. And I do further declare that the
said Drawings and the above mentioned explanations are accurate and
true to the best of my knowledge, as I have compared and examined
the same carefully with the several original modells of my said new
invented locks or machine.
In witness whereof 1 have hereunto set my hand and seal, this
First day of March, in the thirty-fourth year of the reign of
His sail Majesty King George the Third, and in the year of
our Lord One thousand seven hundred and iinety-four.
Muster Extra. in Chancery.
THOMAS SYKES (L.S.)
AND BE IT REMEMBERED, that on the same First day of March.
in.the year above mentioned, the aforesaid Thomas Sykes came before
our Lord the King, in His Chancery, and acknowledged the Specifica-
tion aforesaid, and all and every thing therein contained, in form above
written. And also the Specification aforesaid was stamped according to
the tenor of the Statute in that case made and provided.
Inrolled the Third day of March, in the year above written.