Year: 1886

page_text: Date of Application, 22nd Dec., 1886
Complete Left, 22nd Sept., 1887
Complete Accepted, 6th Dec., 1887
We, Sir GEORGE HAYTER CHUBB, of 128 Queen Victoria Street, in the City of
London, Knight, and Lock and Safe Engineer and Manufacturer, and GEORGE
GASKELL EXTON, of Thurlestone Road, West Norwood, in the County of Surrey,
Engineer do hereby declare the nature of this invention to be as follows:-
This invention relates partly to latch locks in which the latch or bolt is withdrawn
from the striking plate by pulling or pushing the knob or handle, and partly to latch
locks in which the latch or bolt is withdrawn from the striking plate by turning the
knob or handle, such turning action being used either alone or in conjunction with a
push and pull action.
In the specification of a patent granted to us dated the 6th day of October 1885
No. 11,901 is described, and illustrated in the drawings annexed thereto, a push and
pull latch lock having a segmental latch bolt turning on an axis and operated by a
lever, one end of which takes into an inclined slot in the rear end of the said bolt, the
other end of the said lever being acted upon in one direction by a pin projecting from
the spindle of the push and pull furniture, and in the opposite direction by a spring;
an arrangement in which the said lever moves the latch bolt in both directions but in
which the end of the lever is free to move independently of the spindle of the push
and pull furniture when the door is slam-shut. One part of our present improve-
ments relates to means whereby the end of the lever may be connected positively to
the said spindle and yet be free to allow the door to be slam-shut without imparting
motion to the knobs and spindle. For this purpose we form the end of the lever on
which the spindle acts in two parts and hinge these parts together by a hinge which is
formed with a stop at the back, so that when the outer end of the hinged part of the
lever, which is connected positively to the push and pull spindle, is pushed or pulled
by such spindle in one direction, the stop hinge enables the lever to be turned on its
fulcrum so as to disengage the latch bolt from the striking plate; but when the outer
end of the hinged part of the lever is pushed or pulled by the spindle in the opposite
direction, the said hinged part turns on its hinge and has no action on the lever thereby
leaving the said lever free to be moved by the latch bolt, when the door is slam-shut
without imparting motion to the spindle.
A similar effect may be produced by employing two separate levers, one acting

page_text: at one end on the hinged segmental bolt, and acted on at the other end by one end of
the second lever, the opposite end of which is connected to and operated by the push
and pull spindle.
Another improvement in the latch lock forming the subject of the before mentioned
patent No. 11,901, and having for object means of enabling the door to be
easily shut without imparting motion to the knobs and spindle-notwithstanding a
positive connection between two or more of the working parts, as for example between
the push and pull spindle, the lever acting on the latch bolt and the latch bolt itself,
consists in the employment of a rocking bar carrying two arms one of which is
connected with the push and pull spindle so as to be acted upon thereby whichever
direction the said spindle may be moved in, the other arm on the rocking bar is
adapted to act on one side of a tail piece projecting from the latch bolt, a spring
acting on the back of the said tail piece tending always to move the latter in a
direction opposite to that impressed upon it by the aforesaid arm on the rocking bar.
The latch bolt is thus left free to bo turned inwards when the door is slam-shut without
imparting motion to the knobs and spindle notwithstanding the more or less positive
connection of the rocking bar with its arms to the push and pull spindle.
According to another modification of the aforesaid latch lock we employ the rocking
bar and arms last above described, but instead of connecting the arm on the rocking
bar so that it is acted upon by the push and pull spindle whichever direction the latter
may be moved in, we arrange so that it is acted on by the push and pull spindle in
one direction only, and we cause the other arm to engage in an inclined slot in the
latch bolt, and we provide a spring to act either on the rocking bar or on the latch
bolt in order to press the latter outwards. When the door is slam-shut the latch
bolt is free to turn inwards on its centre, and to turn the rocking spindle with it
independently of the push and pull spindle.
Instead of the inclined slot in the latch bolt described in the last paragraph a
suitably formed slot may be made in the arm of the rocking bar, which slot acts upon
a suitable arm extending from the latch bolt and taking into the said slot in the arm
of the rocking bar.
The connection between the aforesaid rocking bar and the push and pull spindle
may be effected in a variety of ways, for instance, by means of a crank pin mounted
on, or formed with a crank arm or disc or otherwise on the said rocking bar and
engaging in a groove or between collars or projections or behind a shoulder, collar
or projection on the push and pull spindle; and the connection between the rocking
bar and the latch bolt may be effected in various ways besides those above described
as for instance by intermediate lovers, links or other mechanical devices interposed
between the rocking bar and the latch bolt, and connected to those parts by any
suitable means. One convenient arrangement consists of a lever or link hinged at
one end to the segmental latch bolt and be engaged thereto by a slot and pin connec-
tion at the other end to some fixed part of the lock plate or frame; this lever or link
being acted on by one of the arms of the rocking bar, and the said rocking bar may
be made adjustable lengthwise in its bearings to suit different positions of the spindle
in relation to the hinged segmental latch bolt, while the arm on the rocking bar can
act on the lever or link hinged to the said latch bolt whatever position the arm of the
rocking bar may be placed in lengthwise of such lever or link.
A further improvement which relates both to latch locks operated by push and pull
spindles and latch locks operated by turning spindles consists in the employment of a
sliding bar instead of a lever or a rocking bar for the purpose of operating the hinged
segmental latch bolt. This sliding bar may be connected to the latch bolt in a variety
of ways, for example, a pin on its end may take into a suitably shaped slot in the
latch bolt, or a hook or projection formed on the end of the slide, or hinged or other-
wise connected thereto, or a link pin jointed thereto may take on to a pin or engage
with a hook or tail piece on the latch bolt, and motion may be imparted to the said
sliding bar by an inclined plane, wedge, or conical surface formed on or secured to
the push and pull spindle acting transversely to the said sliding bar, or by the ordinary
follower either alone or in conjunction with a push and pull action.

page_text: Another improvement in push and pull latch locks consists in constructing such
locks with the ordinary follower arrangement, or a modification thereof, so that they
can be used either as push and pull or as turning latch locks, or as both at the same
time. For this purpose we make the latch bolt lever or the tail of the latch bolt, or
other part acted on by the follower with an inclined surface or a friction roller so
placed and adapted that a conical, or other suitably inclined surface on the push and
pull spindle acts upon such inclined surface or friction roller on the latch bolt lever,
or tail of the latch bolt so as to operate the latter to disengage it from the striking
plate when the spindle is pushed or pulled in one direction. At the same time the
push and pull spindle being square at the part which passes through the follower the
latter actuates the latch bolt in the usual way when the aforesaid spindle is turned
round, consequently the latch bolt may be withdrawn from the striking plate either by
pushing or pulling one of the knobs of the spindle in a certain direction, by turning
the same in either direction or by a compound motion of pushing or pulling the knob
in a certain direction and turning the same at the same time. The latch bolt is of
course pressed outwards by a spring in the usual way.
A modification of the last above described arrangement consists in making the
follower with a friction roller or inclined surface adapted to act against an inclined
surface or roller on the latch bolt lever or tail or other part acted on by the follower,
the said follower being arranged to slide with the push and pull spindle transversely
across the lock and in so doing to act by its friction' roller or inclined surface on the
inclined surface or friction roller on the latch bolt lever or tail, so that the latch bolt
may be withdrawn from the striking plate either by the push and pull action, or by
the turning action, or by both jointly at pleasure.
In push and pull latch locks not intended to act also by the turning action as
described in the two proceding paragraphs, we sometimes arrange the knobs so that
they turn with very great ease upon their spindle so as to show at once, to a person
about to open or close a door, that the latch lock is not one acting by a turning motion
of the knobs.
In push and pull latch locks and in push, pull, and turn latch locks we sometimes
make the latch lock mechanism reversible in or on the case containing the dead lock
mechanism so as to suit right or left handed doors.
We also sometimes employ for the purpose of operating a hinged segmental or
other latch bolt in connection with a push and pull spindle, or for operating a hinged
segmental latch bolt in connection with a turning spindle a flat link or other suitable
chain, by means of which the motion of the spindle in either case is transmitted to
the latch bolt whether the latter is placed on the door or on the door jamb. In the
latter case the chain is connected to a plunger, bolt or other mechanism in or on the
door for pressing back the hinged segmental latch on the door jamb.
We construct the striking plates for latch locks with cam pieces, hooks or latches
turning on axes therein or thereon and pressed outwards by springs, these cam pieces
hooks or latches yield to the pressure of the latch bolt in case the latter fails to yield
for some cause or other when the door is slam-shut and spring out behind the latch
bolt when the door is closed. These cam pieces, hooks or latches may he made
adjustable in the striking plates by means of set screws or otherwise to compensate
for shrinkage or warping of the doors or their frames.

page_text: COMPLETE SPECIFICATION.
Improvements in Latch Locks and in Furniture therefor.
We, Sir GEORGE HAYTER CHUBB, of 128 Queen Victoria Street, in the City of
London, Knight, and Lock and Safe Engineer and Manufacturer, and GEORGE
GASKELL EXTON, of Binfield Road, Clapham, in the County of Surrey, Engineer, 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, reference being had to the accompanying five sheets of Drawings and to
the letters and Figures marked thereon that is to say
This invention relates partly to latch locks in which the latch or bolt is withdrawn
from the striking plate by pulling or pushing the knob or handle, and partly to latch
locks in which the latch or bolt is withdrawn from the striking plate by turning the
knob or handle, such "turning" action being used either alone or in conjunction with
a "push and pull" action.
In the specification of a patent granted to us dated the 6th day of October 1885
No. 11,901 is described, and illustrated in the Drawings annexed thereto, a "push
and pull" latch lock having a segmental latch bolt turning on an axis and operated by
a lever, one end of which takes into an inclined slot in tho rear end of the said bolt,
the other end of the said lever being acted upon in one direction by a pin projecting
from the spindle of the push and pull furniture, and in the opposite direction by a
spring an arrangement in which the said lever noves the latch bolt in both directions,
but in which the end of the lever is free to move independently of the spindle of the
push and pull furniture when the door is slam-shut. One part of our present
improvements relates to means whereby the ond of the lever may be connected
positively to the said spindle and yet he free to allow the door to be slam-shut
without imparting motion to the knobs and spindle. For this purpose we employ the
arrangement shown in Figure 1 of the drawings hereto annexed, which represents a
horizontal section of a push and pull latch lock with a segmental latch bolt A, we form
the end of the lever B on which the spindle C acts in two parts B and B and hinge
these parts together by a hinge D which is formed with a stop E at the back, so that
when the outer end of the hinged part B' of the lever, which is connected positively
to the push and pull spindle C, is pushed or pulled by such spindle in the direction of
the arrow the stop hinge D E enables the lever B B to be turned on its fulcrum F so
as to disengage the latch bolt A from the striking plate; but when the outer end of
the hinged part B¹ of the lever B B¹ is pushed or pulled by the spindle C in the
opposite direction the said hinged part B turns on its hinge and has no action on
the part B of the lever, thereby leaving the said lever free to be moved by the latch
bolt A, when the door is slam-shut without imparting motion to the spindle C.
The positive connection of the end B of the lever to the spindle is effected by a
fork on the outer end of the part B the branches of which fork take between two
pins G, or between shoulders or collars on the said spindle (); or the connection may
be effected by any other suitable means.

page_text: A similar effect may be produced by employing two separate levers, as shown in
Figure 2, which is also a horizontal section of a push and pull segmental latch lock.
In this case one lever B acts at one end on the hinged segmental latch bolt A and is
acted on at the other end by one end of the second lever B', the opposite end of
which is connected to, and operated by the push and pull spindle C in a manner
similar to that described and shown in connection with Figure 1.
Another improvement in the latch lock forming the subject of the before mentioned
patent No. 11,901, and having for object means of enabling the door to be easily shut
without imparting motion to the knobs and spindle, notwithstanding a positive con-
nection between two or more of the working parts, as for example between the push
and pull spindle, the lever acting on the latch bolt, and the latch bolt itself, consists in
the arrangement shown in Figures 3 and 34 which are respectively a horizontal
section and a partial elevation, with the back plate removed, of a push and pull
segmental latch lock in which is employed a rocking bar H carrying two arms one of
which His connected with the push and pull spindle C so as to be acted on thereby
whichever direction the said spindle C may be moved in, the other arm H2 on the
rocking bar His adapted to act on one side of a tail piece A¹ projecting from the
latch bolt A, a spring I acting on the back of the said tail piece tending always to
move the latter in a direction opposite to that impressed upon it by the aforesaid
arm H2 on the rocking har H. The latch bolt A is thus left free to be turned inwards
when the door is slam-shut without imparting motion to the knobs and spindle C,
notwithstanding the more or less positive connection of the rocking bar H, and its
arm H', with the push and pull spindle C.
According to another modification of the aforesaid latch lock, illustrated in
Figure 4, we employ the rocking bar H and arms Hand_H* last above described;
but instead of connecting the arm H on the rocking bar H so that it is acted upon
by the push and pull spindle C whichever direction the latter may be moved in, we
arrange so that it is acted on by the push and pull spindle C in one direction only,
and we cause the other arm H to engage in an inclined slot A in the latch bolt Ä,
and we provide a spring 1 to act either on the rocking bar H or on the latch bolt A
in order to press the latter outwards.
When the door is slam-shut the latch bolt A is
free to turn inwards on its centre, and to turn the rocking spindle H with it
independently of the push and pull spindle C.
Instead of the inclined slot A' in the latch bolt A, as illustrated in Figure 4, a
suitably formed slot H³ (see Figures 4 and 4B) may be made in the arm H² of the
rocking bar H, which slot H³ acts upon a suitable arm A¹ extending from the latch
bolt and taking into the said slot H³ in the arm H2 of the rocking bar H.
The connection between the aforesaid rocking bar H and the push and pull
spindle C may be effected in a variety of ways, for instance, by means of a crank pin
mounted on, or formed with a crank arm or disc, or otherwise, on the said rocking
bar and engaging in a groove or between collars or projections, or behind a shoulder,
collar or projection on the push and pull spindle. And the connection between the
rocking bar and the latch bolt may be effected in various ways besides those above
described, as for instance by intermediate levers, links or other mechanical devices
interposed between the rocking bar and the latch bolt, and connected to those parts
by any suitable means. One convenient arrangement is illustrated in Figures 5
and 54 (which are respectively a section and partial elevation of a segmental latch
lock similar to those shown in Figures 3 and 34) and consists of a lever or link L
hinged at one end to the segmental latch bolt A as shown, or engaged thereto by
a slot and pin connection, as illustrated for example in Figures 1 and 2, and hinged
at the other end by a slot and pin connection, as shown, to some fixed part, M for
example, of the lock plate or frame. This lever or link L is acted on by the
arm H2 of the rocking bar H, and the said rocking bar H may be made adjustable
lengthwise in its bearings N N to suit different positions of the spindle C in relation
to the hinged segmental latch bolt A, while the arm H2 on the rocking bar H can act
on the lever or link L, hinged to the said latch holt, whatever position the arm H³ of
the rocking bar may be placed in lengthwise of such lever or link L.

page_text: A further improvement which relates both to latch locks operated by push and
pull spindles and to latch locks operated by turning spindles, consists in the employ-
ment of a sliding bar instead of a lever or a rocking bar for the purpose of
operating the hinged segmental latch bolt, as illustrated in Figures 6 and 64. The
sliding bar O may be connected to the latch bolt A in a variety of ways, for
example, a pin P on its end may take into a suitably shaped slot A' in the latch
bolt A, or a hook or projection P formed on the end of the sliding bar O, (as
illustrated in Figure 6), or hinged or otherwise connected thereto, (as illustrated
in Figure 6) or a link pin-jointed thereto may take on to a pin, or engage with a
hook or tail piece A¹ on the latch bolt A; and motion may be imparted to the said
sliding bar O by an inclined plane, wedge, or conical surface formed on or secured to
the push and pull spindle acting transversely to the said sliding bar, or by the
ordinary follower (as illustrated in Figures 6 and 6) either alone or in conjunction
with a push and pull action.
Figures 6 and 60 show how a segmental latch bolt operated by a sliding bar may
be applied to a Railway carriage door slam-latch lock. A is the segmental latch
bolt, and O the sliding bar connected thereto in a manner similar to that shown in
Figure 6. The tail of the sliding bar O is brought down so as to be acted on by
the ordinary clutch bolt Qin the manner well known in connection with latch locks
of this kind.
Another improvement in push and pull latch locks consists in constructing such
locks with the ordinary follower arrangement, or a modification thereof, so that they
can be used either as push and pull, or as turning latch locks, or as both at the same
time. This improvement is illustrated in Figures 7 and 7A in which Figure 7 is an
elevation of so much of the parts of a latch lock as is necessary for the illustration of
the said improvement, and Figure 7 is a corresponding section at line X X of
Figure 7. We make the latch bolt lever R, or the tail of the latch bolt. A, or other
part acted on by the follower S with an inclined surface, or a friction roller T so placed
and adapted that a conical or other suitably inclined surface C¹ on the push and pull
spindle Cacts upon such inclined surface or friction roller on the latch bolt lever R, or
tail of the latch bolt A so as to operate the latter to disengage it from the striking plate
when the spindle C is pushed or pulled in the direction of the arrow. The push and
pull spindle C being square at the part which passes through the follower S, the latter
actuates the latch bolt A in the usual way when the aforesaid spindle is turned
round, consequently the latch bolt A may be withdrawn from the striking plate either
by pushing or pulling, in the direction of the arrow, one of the knobs of the
spindle C, by turning the same in either direction, or by a compound motion of
pushing or pulling the knob in the direction of the arrow and turning the same at
the same time. The latch bolt A is of course pressed outwards by a spring U in
the usual way.
A modification of the last above described arrangement is illustrated in Figures &
and 8 which are similar in character to Figures 7 and 74. This modification consists
in making the follower S with a friction roller S' or an inclined surface adapted to act
against an inclined surface T¹ or a friction roller on the latch bolt lever R, or tail or
other part acted on by the follower, the said follower S being arranged to slide with
the push and pull spindle transversely across the lock, and in so doing to act, by its
friction roller S' or inclined surface, on the inclined surface Tor friction roller on the
latch bolt lever R or tail, so that the latch bolt A may be withdrawn from the striking
plate by the push and pull action, or by the turning action of the follower, or by both
jointly at pleasure.
Figures 9 and 9ª are similar views of a latch lock illustrative of a further modifi-
cation of the improvement shown in Figures 7 and 74. In this case the "push pull
and turn" spindle C is slotted at and carries in the said slot a friction roller C.
S is the follower the boss of which is slotted through to allow the inclined plane S²
of the secondary follower S³ to pass through it and into the slot C³ in the spindle C.
When the latter is pushed or pulled in the direction of the arrow the friction roller C
acts on the inclined plane S' of the secondary follower S³ which is thereby driven

page_text: backwards pressing before it the tail of the latch bolt A so as to withdraw the latter
from the striking plate. On the other hand, if the spindle C is turned, both the
follower S and the secondary follower S³ are turned also and the latch bolt A is
thereby operated. So also if the spindle C is pushed or pulled in the direction of
the arrow and turned at the same time the latch bolt A is withdrawn by the
compound motion. Similar letters of reference relate to like parts in all the
Figures 7 to 9ª.
Figures 10 and 10 illustrate a push and pull arrangement applied to a latch lock,
in which a friction roller T is mounted on the latch bolt lever R similarly to the
arrangement shown in Figure 7, and the push and pull spindle C is grooved out with
a curved groove into which the said friction roller T takes. In this arrangement
the latch bolt A is operated by pushing or pulling the spindle C.
In push and pull latch locks not intended to act also by the turning action as
described in reference to Figures 7 to 9* we sometimes arrange the knobs so that they
turn with very great ease upon their spindle so as to show at once, to a person about
to open or close a door, that the latch lock is not one acting by a turning motion of
the knobs. This arrangement is illustrated in Figures 11 and 114, in which C is the
usual push and pull spindle and C³ one of the knobs adapted to turn loosely on the
shouldered down part C of the end of the spindle C, being retained thereon by a set
screw 0, or other suitable means.
We sometimes make the latch lock mechanism reversible in or on the case containing
the dead lock mechanism so as to suit right and left handed doors. For this purpose
we employ the arrangement shown in Figures 12, 124 and 12B in which V is a tube
or case in which are mounted the lateli bolt A, its actuating lever B and spring 1.
This tube V, with the latch mechanism mounted in it, can be passed through a hole in
the fore-end of the lock and be secured thereto by screws passed through the holes in
the flange V, with the striking face A× of the latch bolt A standing either to the
right or left as may be required. C is the push and pull spindle as before.
"Figures 12° and 12D show means whereby the latch bolt A may be reversed without
reversing the operating mechanism. Instead of the latch bolt. A being arranged to
turn on a pin passing through it, it is made of circular shapo at the back and adapted
to take into semicircular recesses formed partly in the fore-end Z of the lock case,
and partly in the plate Z¹ of the same. The latch bolt A may be placed either in the
left hand recess, as shown in Figure 12°, or, by reversing it, in the right hand recess,
as shown in Figure 12, the sliding bar O being adapted to act on the latch bolt in
either position of the latter without being changed in position itself.
We also sometimes employ for the purpose of operating a hinged segmental or
other latch bolt in connection with a push and pull spindle, or for operating a hinged
segmental latch bolt in connection with a turning spindle, a flat link or other suitable
chain by means of which the motion of the spindle in either case is transmitted to the
latch bolt whether the latter is placed on the door or on the door jamb. In the latter
case the chain is connected to a plunger, bolt or other mechanism, in or on the door
for pressing back the hinged segmental latch on the door jamb. Figures 13
and 134 are respectively a section and partial elevation, with the back plate
removed, of a turn latch lock with this improvement applied. A is the latch bolt, I
spring tending to press it outwards, W is a barrel rotated by the spindle C, and Y is
a chain connecting the latch bolt A to the said barrel W. On turning the spindle C
in the direction of the arrow, the chain Y is wound on the barrel W, and the latch
bolt A is withdrawn from the striking plate. On releasing the spindle C the spring I
presses the latch bolt A outwards, and the chain Y returns the barrel W to its normal
position. It is obvious that a push and pull spindle can easily be adapted to act on
à chain in a similar manner.
a
Figure 6 also shows a means whereby straining of the lock furniture may be
prevented and at the same time turning the spindle in the wrong direction has no
effect on the latch bolt. is a follower boss through which the spindle of the lock
furniture is passed in the usual way. This follower is provided with four or any
suitable number of arms g¹. h is a spring click turning on an axis i on the latch

page_text: slide O. This click is free to turn on its axis i from left to right to a limited extent
against the action of its spring h³, but is prevented from turning from right to left
by a stop. It will now be understood that when the spindle is turned in the direction
of the arrow, the arins g₁ of the follower will each act upon the click h, causing the
bar 'O to move from right to left a sufficient distance to withdraw the latch bolt A
from the striking plate, the point of the arm g¹ will then slip past the end of the
click and the bar O will be liberated to the action of the spring I, which will return
it from left to right, thrusting the latch A outwards again. By this means it is
impossible to strain the furniture, because the arm is liberated from the click h
before extreme pressure can be brought to bear on the bar O and latch bolt A.
On the other hand, if the spindle and follower arms g¹ are turned in the direction
opposite to that of the arrow, the arms g' merely turn the click on its centre against
the action of the spring h¹ without having any effect on the bar 0 or latch bolt A.
Having now particularly/described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
First In "push and pull" latch locks having hinged segmental latch bolts, the
construction of the operating lever in two parts hinged together with a stop hinge,
and having one of such parts connected at one end to the "push and pull
spindle, as hereinbefore described, and illustrated in Figure 1 of the Drawings hereto
annexed.
"
Second-In "push and pull" latch locks having hinged segmental latch bolts, the
employment of two levers, one acting at one end on the hinged segmental bolt, and
acted on at the other end by one end of the other lever the opposite end of
which is connected to, and operated by the " push and pull" spindle, as herein-
before described, and illustrated in Figure 2 of the Drawings hereto annexed.
Third-In "push and pull" latch locks having hinged segmental latch bolts,
the employment of a rocking bar carrying two arms, one of which is connected
with and operates the hinged segmental latch bolt, and the other of which is
connected to and operated by the spindle of the " push and pull" furniture, as
herein beforo described, and illustrated in Figures 3, 34, 4, 44, 4, 5, and 5ª of the
Drawings hereto annexed.
Fourth In "push and pull" latch locks having hinged segmental latch bolts, the
rocking bar, the lever or link, and the hinged segmental latch bolt, combined,
arranged, and operating as hereinbefore described, and illustrated in Figures 5 and 5A
of the Drawings hereto annexed.
"
Fifth In push and pull latch locks having hinged segmental latch bolts,
the rocking bar arranged so as to be adjustable lengthwise in its bearings, as herein-
before described, and illustrated in Figures 5 and 54 of the Drawings hereto
annexed, and for the purpose specified.
Sixth In "push and pull" and in "turn" latch locks having hinged segmental
latch bolts the employment of a sliding bar connected at one end to, and operating
the hinged segmental bolt, and actuated itself by the "push and pull" or turning
spindle, as hereinbefore described, and illustrated in Figures 6, 6A, 6B, 6º, 6º, 6, 6F
and 6 of the Drawings hereto annexed.
"
Seventh In "push and pull" latch locks the combination of the "push and pull
arrangements with the ordinary follower arrangements of "turn" latch locks, or
with modifications of such follower arrangements, in such manner that a " push and
pull
"latch lock may be used either as a "push and pull" latch lock, or as a turn
latch lock, or as both combined, as hereinbefore described, and illustrated in Figures 7
to 94 inclusive of the Drawings hereto annexed.
*
وو
Eighth In "push and pull" latch locks the devices for operating the latch bolt
consisting of a friction roller on the sliding bar, lever or other instruinent actuating
the latch bolt, and an inclined plane on or in the " push and pull" spindle, as
hereinbefore described, and illustrated in Figures 10 and 10ª of the Drawings hereto
annexed.

page_text: Ninth In "push and pull " latch locks, arranging the knobs of the lock furniture
so that they are free to turn easily on their spindles, as hereinbefore described, and
illustrated in Figures 11 and 114 of the Drawings hereto annexed, and for the
purpose specified.
Tenth In latch locks having hinged segmental bolts, arranging and constructing
the latch lock mechanism, or the latch bolt only, so that it may be reversed in or on
the case containing the dead lock mechanism, as hereinbefore described, and illustrated
in Figures 12, 124, 12, 120, and 12º of the Drawings hereto annexed, and for the
purpose specified.
Eleventh-The use of a flat link or other suitable chain for the purpose of operating
a hinged segmental or other latch bolt from a "push and pull" spindle, or for
operating a hinged segmental latch bolt from a turning" spindle, as herein before
described, and illustrated in Figures 13 and 134 of the Drawings hereto annexed.
Dated this 22nd day of Sentember 1887
G. H. CHUBB.
G. G. EXTON.
Per W. H. Beck,
115, Cannon Street, London,
Agent.