AN ALTERATION IN THE FORMATION AND CONSTRUCTION OF ALL KINDS OF LOCKS AND LATCHES, WHEREBY I AM ABLE, WITH THE AID AND ASSISTANCE OF SUCH INVENTION, TO MAKE ALL KINDS OF Locks AND LATCHES ON SUCH A CONSTRUCTION AS THAT THEY CANNOT BE PICKED OR OPENED BUT WITH A KEY WHICH IS MADE FOR THE SAME, AND 80 AS NO DIRT, DUST, OR OTHER MATTER CAN ENTER THROUGH THE KEYHOLE OF SUCH LOCKS AND LATCHES, WHICH MAY DAMAGE THE SAME
Year: 1780

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
CAMPION; of Newcastle Court, in the Parish of Saint Clement Danes, in the
County of Middlesex, Locksmith, send greeting.
WHEREAS His most Sacred Majesty King George the Third, by. His
Letter Patent under the Great Seal of Great Britain, bearing date the Fourth
day of March, in the twentieth year of His reign, did give and grant unto
me, the said John Campion, His special licence, that I, the said John
Campion, during the term of years therein expressed, should and lawfully
might use, exercise, and vend, within England, Wales, and the Town of
Berwick-upon-Tweed, my Invention of "AN ALTERATION IN THE FORMATION
AND CONSTRUCTION OF ALL KINDS OF LOCKS AND LATCHES, WHEREBY I AM ABLE,
WITH THE AID AND ASSISTANCE OF SUCH INVENTION, TO MAKE ALL KINDS OF Locks
AND LATCHES ON SUCH A CONSTRUCTION AS THAT THEY CANNOT BE PICKED OR OPENED
BUT WITH A KEY WHICH IS MADE FOR THE SAME, AND 80 AS NO DIRT, DUST, OR OTHER
MATTER CAN ENTER THROUGH THE KEYHOLE OF SUCH LOCKS AND LATCHES, WHICH
MAY DAMAGE THE SAME;" in which said Letters Patent there is contained a
proviso obliging me, the said John Campion, by an instrument in writing
under my hand and seal, to ascertain and to 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 His Majestie's High Court of Chancery within four calendar
months- next and immediately after the date of the said in part recited

page_text: Letters Patent, as in and by the said Letters Patent, relation being thereunto
had, may more fully and at large appear.
NOW KNOW YE, that in compliance with and in pursuance of the said
proviso in the said in part recited Letters Patent contained, I have, in the
margin of these Presents, or hereunto annexed, set forth a full description of
my said Invention, and also three copper-plate Prints thereof; and I, the said
John Campion, by this Instrument in writing under my hand and seal, do
ascertain and particularly describe the nature of my said Invention in the said
Letters Patent mentioned, and declare that the same is to be performed in
manner following, that is to say:-
I cause the iron drill pin of such locks and latches to be made thick in that
part thereof which goes within such locks and latches, and small in that part
thereof which projects beyond the plates of such locks and latches, as
described in the aforesaid Prints of such my Invention at No. 6, and which
said Prints I do hereby declare I mean and intend shall be taken as part and
parcel of these Presents; and I do also, upon the plates of such locks and latches,
and above the keyholes thereof, cause an iron latch to be fixed and suspended
by a pin or screw, the lower part whereof covers the keyhole of such locks and
latches, and the upper part whereof acts as a lever, which said latch and lever
is described as No. 3 in the said Prints; and adjoining unto this latch I cause
a steel spring to be fixed, which keeps the latch over the aforesaid keyhole,
and is described at No. 5 in the said Prints; and on the opposite side of the
aforesaid latch No. 3 I cause an iron dog to be fixed by an iron staple, wherein
it moves, and is described at No. 1 in the said Prints, the point of which said
dog is kept down to the drill pin by a steel spring at No. 2 in the said Prints;
and the upper end of the said dog at No. 1 at (6) binds the lever at (a); and
above the keyhole of such locks and latches I cause another iron dog to be
fixed by an iron staple, wherein it moves, and is described at No. 4 in the said
Prints; and in the bolt No. 7 in the said Prints I fix three iron pins, described
at No. 8 in the said Prints. Over this work I fix an iron cap plate and
escutcheon, which receives the keys for such locks and latches, which said
escutcheon is guarded with threads on the inside, a section whereof is described
by Fig. 2 in the said Prints, and the key of such locks and latches is described
by Fig. 8 in the said Prints; and when the aforesaid locks and latches are
meant to be locked or opened, the key in its passage through the escutcheon
raises np the dog No. 1, which disengages the lever at (a). Then the key
raises the dog No. 4, which pushes up the lever, and by this means the latch
is removed from the keyhole, and the end of the lever at (c) enters the space
between the pins in the bolt at No. 8, and renders the bolt immoveable until

page_text: the whole bit of the key has entered the lock, and then the latch returns to
its first position, which permits such locks and latches to be opened or shut.
And I, the said John Campion, do, by this my Deed, also declare that my
said Invention is applied to all sorts of latches in the same manner that the
same is applied unto locks.
the whole bit of the key has entered the lock, and then the latch returns to
its first position, which permits such locks and latches to be opened or shut.
And I, the said John Campion, do, by this my Deed, also declare that my
said Invention is applied to all sorts of latches in the same manner that the
same is applied unto locks.
In witness whereof, I, the said John Campion, have hereunto set my
hand and seal, this First day of July, One thousand seven hundred
and eighty.
Inrolled the First day of July, in the year of our Lord One thousand
seven hundred and eighty.