IMPROVEMENTS IN LOCKS
Year: 1872

page_text: LETTERS PATENT to John Edwards, of Cassland Crescent, South
Hackney, for the Invention of “IMPROVEMENTS IN LOCKS.”
Sealed the 2nd August 1872, and dated the 5th February 1872.

page_text: I construct the lock as follows, for a railway or other carriage door,
for instance: For the rotating centre piece or tumbler I take a piece
of square iron or other suitable metal, say three-quarters of an inch more
or less across the square, with a square hole in it or rather through it,
the length being about equal to the thickness of the box of the lock,
which box or case I make of cast or wrought metal or other suitable
material. I then turn the two ends of the tumbler circular of any
suitable diameter to revolve in corresponding bearing holes in the two
lock plates, I then round the corners of the square part and concave the
sides thereof. Having thus formed the centre piece or tumbler I case-
harden it (if of iron). Next I construct the two springs of spring steel
or other suitable material of any required substance, the length of
which is equal to or rather shorter than the interior of the box of the lock
lengthways. Having done this I temper them and place them one on
each side of the box with their convexity towards the centre of the box;
I then take the tumbler and place it in the bearing hole before
mentioned, so that the concaved sides thereof correspond with the
convexity of the two springs in position. I afterwards place the loose
lock plate over the other end of the tumbler, and fasten it in the usual
way by a screw.
To form the oil chamber I braze a plate of metal over the lower
portion of the lock under the tumbler and beneath the loose lock plate
before mentioned.
To fix the lock on the door I insert it in the usual manner for
mortice locks, and pass the spindle through the square hole until the
latch comes flush with the outside of the door. .The one end of the
spindle being screwed passes into a nut tapped to correspond, which is
fastened by two small wood screws on the inside of the door.
The action of this lock is as follows:-The latch being out of the
catch and in a vertical position, I turn it one-fourth of the circle to the
right or left, so that the sides of the tumbler which were against the
springs have changed places, and become top and bottom and away from
the springs; the latch by this action falls into the catch, and remains
fixed until the handle is turned again.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Edwards in the Great Seal Patent Office on
the 5th August 1872.
'
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
5 EDWARDS, of Cassland Crescent, South Hackney, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fifth day of February, in the
year of our Lord One thousand eight hundred and seventy-two, in
the thirty-fifth year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto me, the said John Edwards, Her special
licence that I, the said John Edwards, my executors, administrators,
and assigns, or such others as I, the said John Edwards, my executors,
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the
term therein expressed, should and lawfully might make, use, exercise,
and vend, within the United Kingdom of Great Britain and Ireland,
the Channel Islands, and Isle of Man, an Invention for "IMPROVE-
MENTS IN LOCKS," upon the condition (amongst others) that I, the
said John Edwards, my executors or administrators, by an instrument
in writing under my, or their, or one of their hands and seals, should
particularly describe and ascertain the nature of the said Invention,
and in what manner the same was to be performed, and cause
the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said John Edwards, do hereby declare
the nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement:
This Invention has for its object improvements in locks for railway
carriage and other doors.
My improved lock is of very simple and inexpensive construction,
consisting of a box of the usual form of mortice locks, two bow or
other form of springs, a rotating centre piece or tumbler, and a spindle
latch and handle.

page_text: Iormed
он не папоте,
1, the screw on the spindle; G, the laten
Fig. 3, which shews the lock as arranged for a private lock; H is the
latch formed on the tumbler.
In all the Figures each letter is constant to its particular part.
In witness whereof I, the said John Edwards, have hereunto set my
hand and seal, this Fifth day of August, in the year of our Lord
One thousand eight hundred and seventy-two.