AN IMPROVED FORM OF LATH - FOR VENETIAN BLINDS
Year: 1885

page_text: .I.ALFRED GRUNDY of 57 Outer Temple London Middlesex Electrician do' hereby
declare the nature of my invention for AN IMPROVED FORM OF LATH - FOR
VENETIAN BLINDS to be as follows:
The object of this invention is to facilitate the removal and replacement of the
láths of a venetian blind for cleaning painting or other purposes without the
present tedious method of unthreading and re-threading the cords.
In a lath made of wood corrugated iron or any other substance of which venetian
blinds are or may be conveniently made; instead of the usual holes for the passage
of the cords I cut a slot from either the end or sides of the lath: such slot being
of sufficient width for the passage of the cord and enlarged to a circular form
at its inner end for the free working of the cord through the lath in the usual
manner.
Figures 1 to 7 shew some of the various shapes in which the slot may be cut
where A and B are the slots but the shape or position of the slot may be varied to
suit circumstances.
C is shewn as one method of an arrangement for preventing the cord from coming
out of its own accord or by accident or it may if convenient take the form of a
bolt in which case it would have the effect of strengthening the lath in the part
where the slot is cut.
Or it may take the form of a part of a-ring which.can be fixed in the circular space
of the slot and when in one position the space in the side of the ring would allow
the cord to enter or leave but when turned through a part of a circle by a small
projection left for the purpose, the solid part of the ring would cover the slot and
retain the cord in position.

page_text: ALFRED GRUNDY late of 57 Outer Temple WC now of Amberley Works
Amberley Road Paddington Middlesex Electrician 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:-
In a lath for a venetian blind made of wood or other material from which blind
laths are usually or may conveniently be made, I construct in lieu of or in addition
to the usual hole or holes for the passage of the cord or cords a slot or slots from
either side or end of the lath towards the centre or other proper place for the cord
so as to allow of the lath being taken out or replaced without the tedious process
of unthreading the whole of the cord or removing the whole of the laths The slot
may take the form indicated in the drawings by the letter A or may be of any
other convenient or desired shape so long as they allow of the passage of the cord
as herein described.
I may if convenient or necessary add a stop for the cord in the shape of either
a bolt or catch to prevent the cord from slipping out of the slot the said bolt or
catch would also have the effect of strengthening the lath in the place where it
had been weakened by the cutting away of the material to form the slot.
A form of catch & its approximate position is shewn at b.
Having now particularly described and ascertained the nature of my said.
invention and the manner in which the same is to be performed I declare that
what I claim is
A lath for a Venetian blind which by the use of the slot or slots as hereinbefore
described can be taken out or replaced at will without unfastening or removing the
cords.