Year: 1888

page_text: I JOHN POLLOCK of Warrender Lodge Eliot Park, Blackheath in the County of
Kent, Gentleman, do hereby declare the nature of this invention to be as follows:-
These improvements have for their objects the production of an improved window
sash fastener or fastener of like nature of simple form and mode of operation not liable
to readily get out of order and at the same time not accessible for illicit manipulation
from the exterior.
The improved fastener embodies when applied to a sliding sash window the two usual
base plates, one on each meeting rail of the window sashes.
The base plate of the upper sash meeting rail carries a standard of forked form with
a transverse slot in each prong of the fork and passing through these slots and through
an end of a connecting bar swinging in such fork, is a cross pin.
This bar is for the greater portion of its length outside of the prongs referred to
threaded and on this screw thread is a correspondingly threaded knob so that by turning
the knob it may be traversed toward or from the upper sash rail standard.
On the lower sash rail base plate is secured a plate having a slot with enlargement
interior thereof so that whilst its slot is only large enough to adinit the screwed bar,
when that bar passes into the enlargement the knob thereon may be turned and the neck
of the knob drawn into the enlargement securely locking the whole together, until by
reversal of the motion releasal take place.
Instead of the centre of motion of the connecting bar being constituted by a pin in
a slot it may be attained by a circumferential exterior or annular attachment to a
pillar on a base plate confined within fixed limits of motion.
Dated the 22nd day of March 1888.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London,
Agents for the Applicant.

page_text: meeting sash rails.
Figure 2 is a rear view of Figure 1. taken on the line A A and looking into the
room.
Figure 3 is a plan view and Figures 4, 5, 6, 7, 8, 9, 10, 11 and 12 are separate
detail views.
a is the base plate applied to the upper sash a³, meeting rail a¹ which plate carries
a standard a (shown separately in front, side and plan views Figures 4, 5 and 6) of
forked form with a flat a³ in each prong a* of the fork, extending transversely through
the substance thereof and lengthened vertically and passing through these slots a³ and
through an end. of a connecting bar a swinging in such fork a², is a cross pin a'.
This bar a (shown separately by side and plan view Figures 7 and 8) is for the
greater portion of its length outside of the prongs a referred to threaded with a screw
thread a and on this screw thread a is a knob a' (shown separately Figure 9) bored
and correspondingly threaded with a female thread so that by turning the knob a' it
may be traversed toward or from the upper sash rail standard a².
On the lower sash rail b' is secured a base plate b (shown separately at
Figures 10, 11 and 12 by side, front and plan views) having an upright plate b² with
a slot with circular enlargement formed interiorily thercof so that whilst its
mouth or slot 2 is only large enough to admit the screwed bar a', when that bar a
passes into the enlargement 6 the knob a' thereon may be turned and the neck as of
the knob a drawn into the enlargement drawing together and securely locking the
whole, until by reversal of the motion releasal takes place.
When the bar a is raised into a vertical position it may be rested with its peg a³ in
a hole provided at a so as to retain it in a vertical position until again required to
lock two sashes together.
Instead of the centre of motion of the connecting bar being constituted by a pin in
a slot it may be, attained by a circumferential exterior or annular attachment to a
pillar on a base plate confined within fixed limits of motion.

page_text: This modification is shown in Figure 13 by side view (the meeting rails of the
sliding sashes being in section) and in Figure 14 by plan view and in Figure 15 by
horizontal section on the plane B B of Figure 13. Figures 16, 17, 18, 19 and 20
show details separately.
In this case the Castle pattern standard a on base plate is formed with a central
drift or space a² of substantially square form for the greater portion of its height but
at the point a3 (see Figure 17) to the top thereof this drift is made smaller and of
circular section. The wall of the "Castle" standard a is cut away from top to bottom
leaving a vertical slot at in which moves the flat thinner portion as of the bar a the
knob or enlargement a' on which, replaces the cross piece of the previous arrangement.
This enlargement a can rise and fall in the square drift a' but cannot turn therein except
in the quadrant described by the swing of the bar a in the vertical slot a*.
The bar a and its knob as operate with the parts b, 62, 63, 6 as in the previous
arrangement.
When the bar as is raised into a vertical position it may be slightly lowered rested
with its neck a in the hole provided at a10 at top of the castle so as to retain it in a
vertical position until again required to lock two sashes together.
Figure 16 shows the castle standard a, and its slot a* as seen from the front.
Figure 17 shows the same in section at right angles to Figure 16.
Figure 18 shows same in plan.
Figures 19 and 20 show side and edge views of the bar a and its enlargement a'².
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 :-
The combination or arrangement and use of parts of apparatus for fastening window
sashes and for other like uses substantially as set forth.
Dated the 18th day of December 1888.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London,
Agents for the Applicant.