Mechanism Ior window Sashes
Year: 1888

page_text: Date of Application, 4th June, 1888
Complete Specification Left, 28th Feb, 1889
Complete Specification Accepted, 30th Mar,
1889
Mechanism Ior window Sashes
We, WILLIAM WALKER, DAVID WALLACE WALKER, and JAMFS ALEXANDER
WALKER, Sole Partners of and trading as the firm of William Bryden & Sons,
carrying on business as Brassfounders, Bellhangers, and Window Blind Makers, at
55 George Street, in the city and county of Edinburgh, and at 112 St Vincent
Street, Glasgow, Lanarkshire, do hereby declare the nature of our invention to be
as follows
This Invention has reference to and comprises a new or improved construction of
safety catch or locking mechanism and fittings for the raising and lowering of the
upper sash of sliding window sashes, and for fixing the upper and lower sashes at
different distances apart for ventilation or otherwise, without the power of opening,
or tampering with the fittings from the outside, which will be more convenient and
efficient in their action than such locking mechanism has been as heretofore
constructed
The nature and novelty of the improvements consist all as follows -The balanced
weighted sash frames would have two strong cords with or without handles fitted at
each side of the sliding window sashes on the inside for pulling down and pulling up
the top sash, having their upper ends secured to the side rails of the sashes by knots
and eye plates screwed on the inside of the sash those for pulling down the sash
being secured near the top of the sash, and-those-for-pulling it up secured near the
bottom of the sash close to the junction of the two horizontal rails of the upper and
lower sashes those for pulling up the sash being brought over pulleys fitted in
double webbed carrying brackets screwed by flanges to the upper rail of the lower
sash on the inside of the counter check, all so far much of a usual construction
improvements consist in mounting a horizontal sliding catch or bolt in grooves
formed in a recess frame fitted or riveted on the side of one of the said pulley
brackets, preferably on the right hand side of the right hand bracket, with a flange
outside enclosing the whole, and with the catch end projecting out through the recess
TDQJ1
The

page_text: in the back plate, straight on the upper edge but beveled or rounded on the under and
front face, so as by the power of a V-blade or other spring mounted under the catch
to press it out to work against a narrow vertical counter retaining catch or striking
plate screwed on or sunk into the side rail of the upper sash in front of this bolt
and above the countercheck rails,, with one, two, or more chech recesses into which
the point of the bolt would take to retain the upper sash in its highest closed position,
or in one or two positions, with the window open a few inches for ventilation or
otherwise, and prevent it opening more except when this bolt was pulled in from the
inside against the power
of the spring
This is effected by making the right hand
pulling down cord pass down into the recess at the side of the bolt at the back of
a small roller mounted on a stud on the slide plate of the bolt, and then making the
cord pass inwards under this roller and over another roller carried on a fixed stud
between the plates of the bracket on the inside of the front roller and top rail of the
under sash of the window, hanging down with the pulling handle or cord low enough
for the person to catch it when going to pull down the top sash The first action
of pulling this cord has the effect of pulling the bolt out of its notched or striking
plate, and then pulling down the sash to any extent desired, and slackening the cord
so that the bolt goes into whichever notch it is desired, to retain the upper sash open
down from the top, or pull it completely down when that is desired The two
pulling up cords raise the upper sash to any height desired, and the bolt being beveled
on its under outer edge allows it to be automatically forced in against the power of
the spring and enter any of the retaining notches in the striking plate, or completely
secure it close up to the under sash with the counterchecks closed in the horizontal
rails of both sashes
Although this new or improved bolt or catch is preferred to be fittod at the one
side of the window so as to screw its counter or striking plate on to, above the
counter-check, so as to give various retaining positions, yet it is evident that for
light windows it might be placed in the centre of the horizontal rails of the counter-
check, and fitted to be actuated by the pulling down cord, either with or without the
pulley at the side of its bracket for a pulling up cord, with a kneed instead of a straight
locking bolt
When the opening is desired to be left under the lower sash, or partly
of both, then the top sash must be first pulled down until the bolt is past the striking
plate and fixed all as described, and the lower sash raised in the usual manner by the
finger rings to the height desired
1
T
1000

page_text: (OMPLETE SPECIFICATION
Improvements in and relating to Raising and Lowering and Locking
Mechanism for Window Sashes
We, WILLIAM WALKER, DAVID WALLACE WALKER, and JAMES ALEXANDER
WALKER, Sole Partners of and trading as the firm of William Bryden & Sons,
carrying on business as Brass-founders, Bellhangers, and Window Blind Makers, at
55 George Street in the City and County of Edinburgh, and it 112 St Vincent Street,
Glasgow Lanarkshire, do hereby declare the nature of our invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement in writing, reference being had to the accom-
panying Sheet of Drawings, and to the letters and figures marked thereon, that is
to say
-
This Invention has reference to and comprises a new or improved construction of
safety catch or locking mechanism and fittings for the rusing and lowering of the
upper sash of sliding window sashes, and for fixing the upper and lower sishes at
different distances apart for ventilation or otherwise, without the power of opening
or tampering with the fittings from the outside, which will be more convenient and
efficient in their action than such locking mechanism has been as heretofore
constructed
And in order that our said Invention, and the in inner of performing or carrying
the same into effect or practice may be properly understood, we have hereunto
appended an explanatory Sheet of Drawings, in which the same reference letters are
used to indicate corresponding parts in all the figures where shown Figure 1 is a
front elevation in perspective of the upper part of a window frame A showing the
upper sliding sash A¹, and the lower sash A' is broken away, both counterweighted and
mounted as usual to slide in the main frame A, and is fitted with our new or improved
mechanism for raising and lowering the top sash A', and for fixing or locking the top
and bottom sashes A1, A2, at any desirable distances apart, for ventilation or other-
Wise And Figure 2 is an edge sectional elevation corresponding to Figure 1
Figure 3 is an elevation showing one side of our new' or improved construction of
brass or iron bracket case for cont uning the sliding catch or bolt, and which is screwed
And Figure 4 is a
by a flange to one side of the upper rail of the lower sash A
corresponding view with the outside B of the case shown in Figure 3 removed, to
show the internal sliding catch and its retaining spring, and cord pulleys Figure 5
shows a front edge view corresponding to and at right angles to Figures 3 and 4
While Figures 6 and 7 show front and edge views respectively of the striking catch
plate which is screwed to the lower front face of the side rail of the upper sash A' in
à vertical line with the spring sliding bolt catch b, b²

page_text: 11
Referring to these Drawings -The balanced weighted sash frames A', A², have
two strong cords a, a, with bundles at each side of the sliding window sashes on the
inside for pulling down and pulling up the top sash A' respectively, and h iving their
upper ends secured to the side rails of the sashes by knots and eye plates at a¹¹, a
screwed on the inside of the sish A¹, those a" for pulling down the sash being secured
near the top of the sash A', and those a³ for pulling it up secured near the bottom of
the sash close to the junction of the two horizontal rails of the upper and lower
sashes A2, A3, those for pulling up the sash being brought over pulleys a³ fitted on
spindle in the double webbed carrying brackets A screwed by flinges at A to the
upper rail of the lower sash A" on the inside of the countercheck is shown particularly
in Figures 1 and 2 all so fir much of a usual construction The improvements
consist in mounting horizont il sliding catch or bult in grooves 6' formed in 1
recess frame B, B₁ screwed or riveted on the side of one of the sud pulley brackets A³
preferably on the right hand side of the right hand bricket, is shown in Figures 1
and with a web or vertical flange B outside enclosing the whole, and with the catch
end 6 projecting out through the recess in the back plate, stiught on the upper
edge out beveled or rounded on the under front face, as seen particularly in
Figures 3 and 1, so as by the power of a blade or other spring ³n ounted on a stud
at 6 under and inside the catch 6 62 to press it out to work agunst the cutches con i
narrow vertical counter retuning catch or striking plite (screwed at and sunk
into the side rail of the upper sash A' in front of this bolt b, and above the counter-
check rails, as seen it in Figures 1 and 2 This striking plate (his chech
recess c¹ under eich catch c into which the point b³ of the bolt would tihe, to retain
the upper sash A' in its highest close position, or in one or two positions with the
window open for a few inches for ventilation or other wise, and prevent it opening
more except when this bolt was pulled in trom the inside ag unst the power of the
spring 63
This is effected by making the right hand pulling down cord a piss
down into the recess B¹, at the side of the bolt at the back of small grooved
pulley or roller B¹, mounted on stud on the bolt b sliding in a slot & in the plate B,
ind then making the cord a pass inwards under this roller B", and over another
roller B, carried on fixed stud or spindle between the outer plate B and the
djacent plite of the bricket A³ on the lower inside of the front rollui a³ and top
rail of the under sash A² of the window, hanging down with the pulling handle or
cord a low (nough for the person to catch it when going to pull down the top
sash A¹ The first action of pulling this cord a his the effect of pulling tu
bolt b, out of its notched or staking plate c, C, and then pulling down the
sash A¹ to any extent desired, and slickening the cord a so that the catch b³ of
the bolt 6 gous into whichever notch c c it is desired, to retun the upper sash A¹
open down from the top, or pull it completely down when that is desired
pulling up cords a, a, ruse the upper ssh A¹ to any height desired, and the
bolt b,, being beveled on its under fice and allows it to be autom utic illy forced in
against the power of the spring and enter any of the retaining notches C₁ c¹ in the
striking plate C, or completely secure it close up to the unde sash A², with the
counterchecks closed in the horizontal rails of both sishes A', A²
When the opening
is desired to be left under the lower sish A' or partly of both sishes A' A² then
the top sash A must be first pulled down until the bolt 662 is past the striking
plate C, c, ind fixed illis described, and the lower sish A³ rused in the isuil
manner by the finger 11ngs to the height desired
The two
Although this new or improved bolt oi catch b, b³, is preferred to be fitted it
the one side of the window so as to screw its counter or striking plate Cc on to
the cross rail of the upper sash A¹ above the counter-check, as shown in the
Drawings, so as to give vous retuning positions, yet it is evident that for light
or small windows it might be placed in the centre of the horizontal ruls of the
countercheck, and fitted to be ictuited by the pulling down cord a of the upper
sash A¹, either with or without the pulley as at the side of its bracket for a pulling up
coid a¹, and either with the straight locking bolt 6 62 as shown, or it might be with
downward kneed bolt.

page_text: 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 18-
First The construction, or arrangement and combination of the parts of mechanism
and fittings for window sashes, for raising and lowering the upper sash, and locking
the upper and lower sashes at any desired distances apart, substantially as and in
the manner and for the purposes herein described in reference to and shown in the
accompanying Drawings
Second In window sashes, the mounting on the top of the lower sash, of a
horizontal shding catch or bolt in grooves formed in a recess frame and actuated
by a cord and re-acting spring, which cord passes round a pulley attached to sliding
bolt and over a second pulley fixed on frame, substantially as and for the purposes
herein described in reference to and shown in the accompanying Drawings
WRM THOMSON & Co,
96, Buchanan Street, Glasgow
Agents
WRM THOMSON & Co,
96, Buchanan Street, Glasgow
Agents