INVENTION OF CERTAIN NEW IMPROVEMENTS IN THE CONSTRUCTION OF LOCKS
Year: 1795

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
SPEARS, of Tilmouth, in the County Palatine of Durham, send greeting.
WHEREAS His most Excellent Majesty King George the Third did, by His
Letters Patent under the Great Seal of Great Britain, bearing date at West-
minster, the Twenty-eighth day of August, in the thirty-fifth year of His reign,
give and grant unto me, the said James Spears, His especial licence that I,
the said James Spears, during the term of years therein mentioned, should
and lawfully might use, exercise, and vend, within England, Wales, and the
Town of Berwick-upon-Tweed, my "INVENTION OF CERTAIN NEW IMPROVEMENTS
IN THE CONSTRUCTION OF LOCKS;" in which said Letters Patent there is con-
tained a proviso, obliging me, the said James Spears, by an instrument in
writing under my hand and seal, 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 Majesty's High Court of Chancery within
one calendar month after the date of the said recited Letters Patent, as in and
by the same (relation being. thereunto had) may more fully and at large
appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
James Spears, do hereby declare that my said Invention of certain new
improvements in the construction of locks is described in the plan and
description thereof hereunto annexed:-
In witness whereof, I, the said James Spears, have hereunto set my hand
and seal, this Twenty-second day of September, in the year of our
Lord One thousand seven hundred and ninety-five.
JAMES SPEARS. (L.S.)

page_text: AND BE IT REMEMBERED, that on the same Twenty-second day of
September, in the year above written, the aforesaid James Spears came before
our Lord the King in His Chancery, and acknowledged the Specification
aforesaid, and all and every thing therein containeil, 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 Twenty-eighth day of September, in the year above written.

page_text: 5 The inside of the fluted Gown P in Fig. 1t on which the key twins. The Form of which can be varied at
pleasure, so as to alter the ward part of the key
7.
A Strengthning bar ( n
Fig 2nd
n in Fig. 1st) to the Bolt, which is moved by the key
-
and falls into the Bolt at Lo
2.
D.
0.
V.
A Plate which covers the aperture thro' which the ketch rises from A to B Fig? 1st.
The Spring which acts on B. 1. as represented at L. Fig. 7πt
The different parts of the Hey. -
The pin
or
Spear, which passes thre' the Dull pin, d, figt 1st —
or
0.
effect whatever afterwards.
The Balance ketch - The pin, s, is centered in plate, and the end T., in the Bolt us at F Fig. 2nd
To open or shut the Lock press gently on the pumps in the key, which comes in contact with the pin or spear
which passes through the Drill pin d. Fig 1st and acting upon the Balance ketch at w Fig. 2ª raises up the
ketch i at A or Bin Fig. 1st which being taken by the key is moved upon a Float by turning untill it comes to
C. or D. in Fig. 2ª two Sinks in the plate at each end of the float, into which the hetch drops when the Bolt is shot
by means of the Spring E and the key looses it so that the Turning of the Key has no
in shooting
touching the Bolt; untill the Act of pumping is again renewed.-
When the key is lost, or it is thought necessary to prevent the opening locking upon the first principle. By
means of a small wire or pin, passing through the hole S, Fig 1st on to the Spring II and being gently pressed down
throws the Spring off the end of the notch'd Bee W in Fig. 4th at c when the Spring y faces the Bar W with the notch
over the end of the pin O at S. in Fig. 4th which prevents the action of pumping and consequently the Lock cannot be
opened or shut while the Bar W remains in that situation. To remove this Bar it is necessary to press upon the
same pin or were on the Spring I and pass a pin or wire thro' the key hole into a hole on the Crown P. Fig: 1st
at D, then with the Wire you put into the Key hole, move round the brown, which has a ketch in the inside R
Fig : 5th which raise up the Bar as represented Fig: 4th at V. then the Spring II comes behind the end of the Bar
and keeps the Bar in the situation it is represented in Fig. 4.
IV at c
th
The Plate B.2. covers the aperture A. to B. Fig: 1 tt so close as to prevent the admission of any Insturment to
pick the Lock, which cannot be done without raising up the Balance ketch N- and throwing off the Bar, B. I, which
is impossible - The plate B. 2 also forms a ward for the key as represented in the Section at II.—