IMPROVEMENTS IN LEVER CATCH FASTENERS FOR WINDOWS
Year: 1884

page_text: I FREDERICK LEA of 19 Buckingham Street Strand in the County of Middlesex
Surveyor do hereby declare the nature of my said Invention for IMPROVEMENTS
IN LEVER CATCH FASTENERS FOR WINDOWS to be as follows:-
This Invention relates to certain improvements in lever catch fasteners for
window sashes, the object being to prevent the lever being pushed back by any
instrument inserted into the slit between the two adjoining sashes, also to enable
the two sashes to be brought closer together than usual by the forward action of
the catch lever,
According to my Invention I form by casting or otherwise a projecting nose
piece or lump on the boss of the catch lever and I pivot a double ended levor or
paul on the back base plate the two ends of said lever or paul being so shaped that.
one or other of them rests in the path of the nose piece or lump to be moved by it
when thrown in either direction.
One paul is flat and when thrown over the meeting rails of the two sashes it
covers the space between the back and front base plates. The flat paul has-also a
turned up end against which the catch lever is caused to bear as to lock it firinly
when the catch is closed.
"
The front base plate has two claws one on the plate itself and one above so that
the shoulder of the catch lever shall travel between and act upon both of them and
so exert a straining pressure upon the whole of the stud pin which carries the
catch lever instead of the strain being thrown on the lower part of the stud pin as
is usual.

page_text: I FREDERICK LEA of N° 19 Buckingham Street Strand in the County of
Middlesex Surveyor do hereby declare the nature of my Invention for IMPROVE-
MENTS IN LEVER CATCH FASTENERS FOR WINDOWS and in what manner the same
is to be performed, to be particularly described and ascertained in and by the
following statement:―
This Invention relates to certain improvements in lever catch fasteners for
window sashes, the object being to prevent the catch lever from being forced back
or hooked open by any instrument being inserted into the slit between the two
adjoining sashes, also to enable the two sashes to be brought closer together than
usual by the forward action of the catch lever.
According to my Invention I pivot a double ended paul or lever on the back
base plate of fastener and form by casting or otherwise a projecting nose piece or
lump on the boss of the catch lever the two ends of the said paul or lever being so
shaped that one or the other of them rests in the path of the nose piece or lump to
bo moved by it when the catch lever is thrown in either direction.
When the paul or lever is thrown over the meeting rails of the two sashes it
covers the space between the back and front base plates also the underside of catch
lever. The paul has also a turned over end which when the fastener is closed
covers the top side of the catch lever.
adapt to the front base plate by casting or otherwise two claws one formed
on the plate itself and one above and also form additional shoulder on catch lever
so that the shoulders of the catch lever are made to travel between and act upon
both of the claws so as to exert a straining pressure upon the whole of the stud
pin which carries the catch lever instead of the strain being thrown on the lower
part of the stud pin as is usual.

page_text: 3rd The forming by casting or otherwise of two claws on the front base plate one
above the other and casting additional shoulder on the catch lever to work on the
lower claw.