Improvements in Locks.
Year: 1890

page_text: Date of Application, 29th May, 1890
Complete Specification Left, 25th Feb., 1891-Accepted, 28th Mar., 1891
PROVISIONAL SPECIFICATION.
Improvements in Locks.
I, ANTONIO IZIDRO GONSALVES, of 2, Rue d'Amboise, Paris, France, Artisan,
do hereby declare the nature of this invention to be as follows:
--
My invention relates to improvements in spring latch locks, and has for its object
to enable the latch bolt to be locked by turning its knob or handle.
The invention is applicable to locks of various kinds whether provided or not.
with a dead bolt operated by a key. The principal object of the invention is to
enable the use of a bolt on the inside of a chamber or house door to be dispensed
with and to enable the door to be fastened from the inside by simply turning the
knob handle.
Reference is to be had to the accompanying drawings, forming part of this
Specification, which illustrate two modes of locking the latch bolt, all other parts
of the lock being omitted. Figures 1 to 9 shew one form of lock in various positions.
Figures 1, 2, and 3, shew outside face views, Figures 4, 5, 6, horizontal sections,
and Figures 9, 8, and 7 inside face views, of the lock in three different positions.
In Figure 1 the latch is drawn back in Figure 2 it is shot or engaged in the catch
plate, and in Figure 3 the knob handle is turned a quarter round upon its spindle
so as to lock the latch. Figures 10, 11, and 12 shew the improvement applied to
another form of lock in which the latch is operated by a knob at its rear end which
protrudes from the face of the lock.
-
Referring to Figures 1 to 9 a is the knob handle turning upon a spindle & fixed to
the latch bolt e the spindle being free to slide back and forth in a slot d in the lock
case in the ordinary way. e is a stud fixed on the back of the lock case which is
received in a radial groove a male in the inner face of the base of the knob
handle a and formed at the end nearest the centre with a lateral enlargement h
concentric with spindle b. In its normal position the groove is horizontal and by
playing along the stud e permits of the latch being freely drawn back but by
turning the knob a quarter round on its spindle, as shewn in Figures 3, 6, and 9,
the concentric recess is caused to engage with the stud e whereby the latch is
prevented from being withdrawn from engagement with the catch plate. In the
first position shown (Figures 1, 4, and 7) the latch is retracted and the stud e is at
the outer end of the groove; in the second position (Figures 2, 5, and 8) the
latch is projected into engagement with the catch plate; and in the third position
(Figures 3, 6, and 9) the latch is locked in the shot position by turning the handle
quarter round as above mentioned. i is a cavity in the base of the knob handle,
o so balance the knob as to prevent it turning from the position in which it is set.
The invention can also be applied to a push and pull handle lock. Figures 10, 11,
and 12, shew the mode of locking a latch lock in which the latch slides completely
hrough the case. The knob a of the latch bolt bc is pivoted on a spindle d
urning in ears e between which works a hook/fixed to spindle d so as by turning the
nob a to be turned into engagement with the fixed catch g whereby the retraction
of the latch is prevented. When turned out of engagement with the catch the
ooked catch is held by a tail piece in horizontal alignment with the latch
olt be and is received between prolongations of the ears e by which it is wholly
oncealed.
It will be understood that the details of the above arrangements may be varied
ithout departing from the invention.
501
1000
.

page_text: COMPLETE SPECIFICATION.
Improvements in Locks.
I, ANTONIO IZIDRO GONSALVES, of 2, Rue d'Amboise, Paris, France, Manu-
facturer, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
My invention relates to improvements in spring latch locks, and has for its
object to enable the latch bolt to be locked by turning its knob or handle.
The invention is applicable to locks of various kinds, whether provided or not
with a dead bolt operated by a key.
The principal object of the invention is to enable the use of a bolt in the inside of
a chamber or house door to be dispensed with and to enable the door to be fastened
from the inside by simply turning the knob handle.
Reference is to be had to the drawings accompanying my Provisional Specification,
which illustrate two modes of locking the latch bolt, all other parts of the lock
being omitted.
Figures 1 to 9 shew one form of lock in various positions. Figures 1, 2, and 3
shew outside face views, Figures 4, 5, 6, horizontal sections, and Figures 9, 8, and 7,
inside face views, of the lock in three different positions. In Figure 1 the latch is
drawn back, in Figure 2 it is shot or engaged in the catch plate, and in Figure 3
the knob handle is turned a quarter round upon its spindle so as to lock the latch.
Figures 10, 11, and 12, shew the improvement applied to another form of lock in
which the latch is operated by a knob at its rear end which protrudes from the face
of the lock.
Referring to Figures 1 to 9, a is the knob handle turning upon a spindle fixed
to the latch bolt c, the spindle being free to slide back and forth in a slot d in the
lock case in the ordinary way. e is a stud fixed on the back of the lock case
which is received in a radial groove made in the inner face of the base of the
knob handle a and formed at the end nearest the centre with a lateral enlargement h
concentric with spindle b. In its normal position the groove is horizontal and by
playing along the stud e permits of the latch being freely drawn back but by turning
the knob a quarter round on its spindle, as shewn in Figures 3, 6, and 9, the
concentric recess is caused to engage with the stude whereby the latch is pre-
vented from being withdrawn from engagement with the catch plate. In the first
position shewn (Figures 1, 4, and 7,) the latch is retracted and the stud e is at the
outer end of the groove g; in the second position (Figures 2, 5, and 8) the latch
is projected into engagement with the catch plate; and in the third position
(Figures 3, 6, and 9) the latch is locked in the shot position by turning the handle a
quarter round, as above mentioned. is a cavity in the base of the knob handle
to so balance the knob as to prevent it turning from the position in which it is set.
The invention can also be applied to a push and pull handle lock. Figures 10, 11,
and 12, shew the mode of locking a latch lock in which the latch slides completely
through the case. The knob a of the latch bolte is pivoted on a spindle d turning
in ears e between which works a hook f fixed to spindle d so as by turning the
knob a to be turned into engagement with the fixed catch whereby the retraction
of the latch is prevented. When turned out of engagement with the catch
hooked catch is held by a tail piece in horizontal alignment with the latch
bolt be and is received between prolongations of the ears e by which it is wholly
concealed.
the
It will be understood that the details of the above arrangements may be varied
without departing from the invention.
Having now par ticularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1st. The combination, with the latch bolt, of a knob handle capable of rotation

page_text: to a limited extent on an axis fixed to the bolt and having grooves or recesses on
its inner face adapted to work over, or to engage with, a fixed stop on the lock case
according as the knob is turned in the one or other direction for the purpose of
permitting free motion of the latch bolt or of locking it in its protruded position,
substantially as shewn and described.
2nd. The combination, with a latch bolt, of a rotating knob and a hooked catch
adapted to turn therewith and to be thrown into engagement with a fixed catch for
the purpose of preventing the retraction of the latch bolt, substantially as described.
Dated this 25th day of February 1891.
A. I. GONSALVES.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Patent Agents.