IMPROVEMENTS IN LOCKS OR LATCHES, AND. IN ATTACHMENTS FOR SAME
Year: 1880

page_text: LETTERS PATENT to William White, of Wimpole Street, in the County of
Middlesex, for an Invention of "IMPROVEMENTS IN LOCKS OR LATCHES, AND.
IN ATTACHMENTS FOR SAME,"
PROVISIONAL SPECIFICATION left by the said William White at the Office
of the Commissioners of Patents on the 21st October 1880.
WILLIAM WHITE, of Wimpole Street, in the County of Middlesex.
MENTS IN LOCKS OR LATCHES, AND IN ATTACHMENTS FOR SAME."
"IMPROVE-
This Invention consists mainly as follows:-(1st.) In substituting for the springs
ordinarily used in door locks and latches a weighted lever, which produces the
same result as the spring in forcing out the latch after being drawn in by the
operation of the handle or spindle in the usual way.
The latch is opened with a single or double follower, and the short end of the
lever being pressed back raises the weighted end, which again falls and returns the
latch to its place.
The small end of the lever may act upon the back or other convenient part of
the latch.
(2nd.) The mode of attaching the spindle for this lock or latch is by having one
or both ends thereof tapped to receive a nut and split to receive a key or wedge by
which the nut is securely held in position.
The top of the handle or knob is left open to receive the nut, and may or may
not be closed up with a capping or cover. The arrangement of spindle is applicable
to ordinary locks. In some cases the wedge or key may be dispensed with and the
nut only used.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William White in the Great Seal Patent Office on the 21st
April 1881.
WILLIAM WHITE, of Wimpole Street, in the County of Middlesex.
MENTS IN LOCKS OR LATCHES, AND IN ATTACHMENTS FOR SAME."
"IMPROVE
This Invention consists, first, in substituting for the springs ordinarily used in
door locks and latches a weighted lever, which produces the same result as the
[Price 4d1

page_text: spring in forcing out the latch after being drawn in by the operation of the handle
or spindle in the usual way.
The latch is opened with a double follower, but single may be used, and the
short end of the lever being pressed back raises the weighted end, which again falls
and returns the latch to its place.
The small end of the lever may act upon the back or other convenient part of
the latch.
Second. The mode of attaching the spindle for this lock or latch is by having one
or both ends thereof tapped to receive a nut elongated so as to be kept in place by
The
a cap screwed on. The top of the handle or knob is left open to receive it.
arrangement of spindle is applicable to ordinary locks. In order that my Invention
may be fully understood, I will now proceed to further describe same by reference
to the accompanying Drawings.
Fig. 2, sectional plan.
Fig. 3, modified form of Fig. 1.
B, balance weight centred at b, the portion p pressing against the back of latch 7;
S, spindle; t, slot in latch for follower F. The latch is actuated by handle on
spindle S, and is withdrawn, and when released the latch resumes, by means of
balance B, its normal position.
In Fig. 3 the balance B is fitted above the latch l, so that when the latch Z is
raised the balance B is also raised, and the latch being released the balance brings
same down. In each of these arrangements a lock can be applied.
Figs. 4 and 5 show attachment for the spindle.
In Fig. 5 the spindle is tapped. The nut n is formed with a projecting piece or
tube of such length that when the nut is screwed home it almost or quite abuts
against the inside of a cap.
Having now particularly described and ascertained the nature of the said
Invention, and in what manner the same is to be performed or carried out in
practice, I hereby declare that I claim,―
(1.) In locks and latches the pivoted balance B fitted for operation on the bolt as
a substitute for springs, substantially as shown and described.
.
(2.) The means for attaching knobs to spindles, consisting of nut n combined
with the threaded spindle and aperture knob, substantially as shown and described.
In witness whereof, I, the said William White, have hereunto set my hand
and seal, this Twentieth day of April, in the year of our Lord One thousand
eight hundred and eighty one.
Witness,
W. HILLIER,
· 21, Cockspur Street,
Charing Cross.
WILLIAM WHITE. (L.S.)