Improvements in Window Sash Fasteners.
Year: 1889

page_text: Date of Application, 8th Jan., 1889
Complete Specification Left 24th Sent 1889-Accented. 2nd Nov. 1889
PROVISIONAL SPECIFICATION.
Improvements in Window Sash Fasteners.
JAMES LOMAX SUTCLIFFE 1 Henry Nelson Street South Shields Travelling Agent
do hereby declare the nature of this invention to be as follows:-
A selfacting trippet spring block for fixing to the catch loop plate of an ordinary
window sash fastener or for fixing on the lower window sash so that in both cases
in bringing round the lever of an ordinary sash fastener under the loop of catch
plate on lower window sash, it must pass over the trippet spring block which gives
way to the pressure of lever and when the lever has passed, the spring at onco takes
up its position again, effectually blocking or locking the lever, so that it is impossible
for any person outside to open the window by inserting a knife or thin piece of
metal between upper and lower window sashes and pushing back the lever.
Dated this 7th day of Januo 1900
JAS. L. SUTCLIFFE.
COMPLETE SPECIFICATION.
Improvements in Window Sash Fasteners.
JAMES LOMAX SUTCLIFFE 1 Henry Nelson Street South Shields in the County
of Durham Travelling Agent 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 window fasteners of such windows that are made in two or
more parts so that each part or sash can be moved vertically up or down. My invention
is a self acting trippet spring block for fixing either on the catch plate of an ordinary
window sash fastener or on the lower window sash, the spring is made of a narrow and
thin piece of steel properly bent so that it stands up in the middle near the centre of
the spring is attached a trippet made of brass or other metal which is rivetted to the
spring with two or more rivets at one end. The other end of spring is left loosely
resting on the metal plate or sash, so that it can give way to pressure when the lever
of ordinary sash fastener is passing over it and to release the lever when fastened it is
merely necessary to press down the trippet spring with a finger so that the lever can
pass over it. The trippet spring block can be applied to existing window fasteners by
being simply screwed on the lower window sash. My invention may be more fully
understood by accompanying two sheets of drawings. Figure 1 is a plan view
shewing the window fastened with my invention fixed to the metal catch plate. Figure 2
is a plan view shewing the window unfastened with trippet spring block fixed to the
catch plate. Figure 3 is a plan view shewing the window fastened with the trippet
spring block fixed on the lower window sash. Figure 4 is a front view of my invention.
Figure 5 is a front view, shewing the elevation of the tripping spring block in section.
S figure 1 is the upper window sash U figure 1 is the bottom window sash T* and T
are the metal plates screwed to the window sashes the lever C figures 1 2 3 and 4 is
mounted on Tx plate and radiates on its centre L and in being moved round is stopped
by the loop J figures 12 3. 4 to prevent the lever C when fastened figures 1 3 and 4
being pushed back by a knife or thin piece of metal inserted between the sashes S
and U at F figure 1 I place spring E to which is rivetted brass or metal trippet P
figures 13 and 4 the spring being bent so as to stand up in the middle E figures 4
and 5 the trippet spring block is rivetted to catch plate T figures 12 and 4 by two or
more rivets or screws O figures 1. 2 and 4. or screwed to lower window sash figure 3
when the lever C figures 13 and 4. is brought round under loop J figures 13 and 4
it slips over the trippet P and spring E gives way to the pressure until the lever has

page_text: cleared or passed the trippet P figures 1. 3. and 4. when the spring at once takes up
its position and thoroughly blocks or locks the lever and prevents the window being
opened from the outside.
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
An improvement in Window Sash Fasteners by the use and application of
trippet spring block E and P figures 1. 2 3. 4 and 5 substantially as described and
illustrated. I do not claim parts T T L C or J which are old figures 1 2 3 and 4.
Dated this 23rd day of September 1889.
JAS. L. SUTCLIFFE.