Improvements in Adjustable Stops for Window Sashes and the like.
Year: 1895

page_text: Date of Application, 18th Dec., 1895
Complete Specification Left, 13th Oct., 1896-Accepted, 12th Dec., 1896
PROVISIONAL SPECIFICATION.
Improvements in Adjustable Stops for Window Sashes and the like.
I, FRANCIS JOSEPH JAMES GIBBONS, of St. John's Works, Church Lane,
Wolverhampton, in the County of Stafford, General Brassfounder and Lock
Manufacturer, do hereby declare the nature of this invention to be as follows:-
My invention relates to adjustable stops for window sashes and the like, whereby
the distance to which a sash may be opened can be limited.
A stop constructed according to my said invention comprises a stop secured to
the top sash at a distance of about six inches from the bottom rail of the same.
The said stop possesses a round cylindrical bolt provided with an interior screw
thread so that it may be moved forwards or backwards through the corresponding
motions of locking and unlocking by an exteriorly screw-threaded bar when the
latter is turned by means of a key.
To the bottom sash is secured a plate furnished with two, three, or more holes
which are of a diameter corresponding to that of the bolt of the before mentioned
stop on the top sash each hole being a socket for the bolt. These holes are
connected by a slot of such width that when the key is in the bolt, one or both
sashes may be raised or lowered independently of the other of them.
As many sockets as there are in the plate, so many locked positions will one of
the sashes be capable of.
The distances of the said holes from each other determine how far the sash may
he opened and locked in position.
I prefer to make use of two keys, one of which is designed to be kept by the
The master key is
master or superintendent, and the other by the servant.
provided with a deep bore and a transverse slot, and the interior of the bolt is
constructed to correspond therewith and to be engaged thereby in such a way that
the key can be withdrawn at any point of the motion of the bolt. The second key
possesses a bit and the slot in the bolt end to receive the latter presents itself only
when the bolt is locked. Consequently, the servant's key can only vary the degree
of opening between the moveable sash and its frame. The second or servant's key
is a bitted one. The notch in the screwed bar to receive the bit, presents itself
opposite the key hole in the front end of the bolt only when the latter is locked.
Less than a revolution of a key suffices to unlock the bolt, so that the servant's key
cau be withdrawn from the bolt only when the latter is locked. In the unlocked
position, it is held in the bolt. When it is so held, it can be moved through the
slot in the socketted plate above mentioned, or the other sash can be moved past
it. In any case, the servant's key only controls the amount that the sash or the
window is opened, and not the fact of being opened.
Deted this 18th day of December 1895.
PHILLIPS & LEIGH,
Agents for the Applicant..

page_text: COMPLETE DIECIFICATION.
Improvements in Adjustable Stops for Window Sashes and the like.
I, FRANCIS JOSEPH JAMES GIBBONS of St. Johns Works, Church Lane,
Wolverhampton, in the County of Stafford, Lock Manufacturer, 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 adjustable stops for window sashes and
the like; and the object of it is to place the distance to which either of a pair of
unlatched sashes can be opened, under the control of the attendant within certain
limits. Stops made according to it are, therefore, particularly adapted for use in
hospitals, asylums, schools, convalescent wards and the like where the degree of a
ventilation common to all, may require adjustment to meet the necessity of a
minority.
Referring to the accompanying figures which are to be taken as part of this
specification and read therewith :-
Figure 1 is an end elevation partly in section of the adjacent portions of two
sashes.
Figure 2 is an elevation from the inside corresponding with Figure 1.
Figure 3 is an elevation of a superior's key.
Figure 4 is an end elevation, partly in section of the adjacent portion of two
sashes and the attendant's key, shewing the window locked open.
Figure 5 is an elevation from the inside corresponding with Figure 4.
A is the top and B, the bottom sash of a vertically sliding sash window.
sheets of drawings are turned half round, they will illustrate the use and utility of
the invention on horizontally sliding sashes.
If the
The bolt is fixed upon one of the stiles of the top sash near the bottom of it and
the staple, upon the stile on same side of the bottom sash, near the top of it.
The motion of the bolt is one of protrusion from the frame of the top sash
into its staple. In both these respects the present invention conforms to previous
usage.
C is the bolt. It is circular in cross section and tubular. D is the bolt case
and d, a flange on it by which the bolt can be held to the side of the top sash A
and flush with the face of it. E is a screw threaded bar or rod fitting as to its
body within the bore of the bolt C. The male screw thread e engages in a corre-
sponding female screw thread in the bore of the bolt. The rod E has only one
motion a circular one about its axis,-which it receives from either of the keys
hereafter described. It is prevented from any other motion partly by its inclusion
within the bolt C, but principally by the engagement with the end d² of the bolt
case D, on one side thereof, of the shoulder on the said rod produced by the
reduction of the diameter of its end e³, and on the other side thereof, of the split
pine. Obviously the desired motions of protrusion and retraction, respectively,
equivalent to locking and unlocking the bolt C are imparted to it by rotating the
rod E, but some provision is necessary to prevent the said bolt partaking the
circular motion of the rod E. Any suitable one may be adopted. The one
illustrated consists of the combination of a stud d³ fast to the case D and projecting
into a horizontal slot c in the bolt. The length of this slot corresponds with the
length of the bolt's motion, so that it also serves as a stop.
cis the front plate of the bolt C and being fast to the front end of it forms an
integral portion of it. f is a circular hole in and through the centre of it, of a proper
size to admit the shanks of either the superior's key For the attendant's key G,
both keys being the same size and shape as to their shanks. Seeing that the
superior key F must have free control of the stop at any moment and in any

page_text: position of such stop, it is evident that its engagement with the stop must be of a
type that can be operative within the circular section of the shank. The one
illustrated consists of the bore of the key shank, a pin e projecting axially from
the bottom of a circular cavity e in the front end of the rod E, a slot f' across
the end of the shank of the key F and a transverse pin ee projecting from the
opposite sides of the pine and of the same diameter as the width of the slot f¹.
The control of the stop by the attendant's key G must be limited to entrance
through the key hole only when the bolt C is locked. The provision for this
limitation consists in the combination with the shank of the key G, of a web g, a
slot g', being a radial extension of the hole f in the plate c, and just large enough
to pass the said web, and a horizontal groove g³ in the side of the cavity e. The
slots g', and groove g³ are so positioned with reference to each other, that they
register only when the bolt C is locked. Further, the screw thread e is so
proportioned as to pitch and number of turns, that it cannot make the slot g²
register, with the slot g¹ without at the same time pulling the bolt C into the locked
position.
The staple consists of two metal plates h, h, standing opposite to each other, on
the inside and outside of the stile and flush with the faces of the latter. They are
held to the stile by any suitable means. is a slot through the stile and the
plates h, h, from one side to the other. The length of this slot is proportionate to
the maximum distance to which the sashes are to be opened, and the width of it
enough to clear the shank of the attendant's key G." Each end of the slot is
expanded into a socket of the proper size and shape to receive the bolt C.
Between the terminal sockets ",, and along the slot i, there are as many
intermediate sockets, as may be desired. The figures illustrate only one, that
being enough to shew the function of any such socket.
I have shewn the sockets both terminal and intermediate, as extending from the
outside of the stile to the inside of it. This continuation is not essential to the
invention it is enough if the sockets are each deep enough to receive the protruded
end of the bolt C.
My invention is used and acts as follows:-
To begin with the bolt C is locked by either the superior's key F or the
attendant's key G into one of the sockets or 3. It does not matter which of the
sockets it is locked into but it must be locked into one of them. It is assumed
that, in actual use, this initial locking would be done by the superior. His locking
Decessarily leaves the groove g² registering with the slot g¹ in the key hole. The
attendant's key G may then be engaged with the bolt C so as to unlock it, if it is
desired to increase or decrease the distance to which the sashes are opened. But
during the time that the bolt C remains unlocked, the attendant's key G remains
locked in the bolt for the reason that the groove g³ does not register with the
slot g¹. Therefore, the distance at which the sashes are to be set must be one
corresponding with the locking of the bolt C into one of the sockets, for it is
impossible to withdraw the key G until the bolt C is locked. The presence of the
shank of the said key G in the slot i also prevents the window being opened wider
than the slot i is long. When once the attendant's key G has unlocked the bolt C,
it must either lock it again into one of the sockets or it must remain held to the
top sash A and projecting into the room through the slot i in the bottom sash.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The combination of bolt, screw threaded rod engaged therewith, front plate,
staple and two keys, as and for the purpose set forth.
2. The combination of bolt, staple both slotted and socketted, and two keys, as
set forth.
3. The combination of bolt, screw threaded rod engaged therewith, superior's
key and device by which it can engage the screw threaded rod, attendant's key,

page_text: device by which it can engage the said rod and be detained by or remain locked in
the said bolt, and slotted and socketted staple, as set forth.
Dated this 13th day of October 1896.
PHILLIPS & LEIGH,
No. 22 Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.