Improvements in "Ladders" and other Supports of Venetian Blinds:
Year: 1890

page_text: Date of Application, 10th Oct., 1890
Complete Specification Left, 18th June, 1891-Accepted, 18th July, 1891
PROVISIONAL SPECIFICATION
Improvements in "Ladders" and other Supports of Venetian Blinds:
We, FREDERICK GEORGE ENGELBACH, of Moretonhampstead, in the County of
Devon, Physician and Surgeon, and DANIEL DINGLE, of 3 Castle Park, Exmouth,
in the County of Devon, Gentleman, do hereby declare the nature of this invention
to be as follows:-
::
In a venetian blind constructed in accordance with this invention the laths of the
blind are supported on armis of steel or other suitable metal extending transversely
under each lath and linked or otherwise connected at each end to metal chains exten-
ding vertically at the front and back of the blind. At the top the chains are linked
or otherwise attached to eyes secured in a metal plate screwed or otherwise fixed to
the turnover lath. At the lower end the chains are similarly secured to the bottom
lath of the blind. The transverse arms and vertical chains are substituted for the
usual webbing technically termed laddering." The cords by which the blind is
raised and lowered are, after passing over the usual pulleys, carried down in the
usual manner through apertures in the laths, but, under this invention, they are
passed also through eyes formed at or about midway between the ends of the
transverse arms aforesaid. The plates secured to the turnover lath are pierced for
the passage of the cords. A further feature of novelty comprised in this invention
consists in the use of flat chains, in substitution for the usual webbing, for
suspending the blind from the pulley lath.
The chains are, after having been passed over the turnover roller, secured at the
ends to the turnover lath.
Dated this 4th day of Antahan 1900.
NICHOLAS WATTS,.
Bristol Bank Buildings, Bristol, Agent.
COMPLETE SPECIFICATION.
Improvements in Ladders and other Supports of Venetian Blinds.
We FREDERICK GEORGE ENGELBACH Surgeon of Moretonhampstead in the
County of Devon and DANIEL DINGLE of 3 Castle Park, Exmouth in the same
County, Gentleman 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:-
1st. This invention is intended as a substitute and to replace the webb ladders
or supports (now in general use) for venetian blinds by metallic chains, rings, cross
bars or loops of wire and plates.
2nd. The length of chain, number of loops or cross bars and rings will depend
on the width and length of the blinds.
3rd. The chains A have small rings B attached at regu'ar spaces on the links of
chain, and attached to these small rings B are cross bars or supporting loops Cof
wire which when so attached or fixed to the small rings on the chains form (with
the chains A on each side of the laths D a rest or ladder in like manner to the
small cross pieces of tape used for the support of laths in the ordinary webb ladders
of venetian blinds.
4th. The chains are fastened to the turnover lath E and to the bottom
lath E. E. by screws passing through the links of chain or by being linked to a
piece of thin metal K and K. K. of which K is the top piece and K. K the bottom
piece. The top piece K is perforated at K I for chains to be hooked in, at K 2 for

page_text: screws to fix plate to lath and K 3 for cord to pass through. The bottom plate K. K.
is similar to K with exception that instead of central perforation K 3 there is a
punched depression in its place to hide knot of cord. No other part of the chains
or cross supports are fastened in any way to the laths, thereby allowing the laths to
be easily taken out and replaced for cleaning.
5th. The turnover lath E (at the top of the thin ones) is connected and supported
to the top or wheel lath F by a broad flat chain G which passes over the usual
broad turnover wheel in the top or pulley lath F and works in every respect
similar to the web used for this purpose in web fitted blinds.
6th. The action of drawing up and lowering the laths is by means of cords which
pass over the pulley wheels H in the top lath F, thence passing down through the
holes cut in laths-also passing through the central hole in wire cross bar or loop
as shewn in drawing and are fastened to the bottom laths by a knot in the usual
way, thus working in every respect similar to the action in drawing up and letting
down of web fitted blinds.
7th. The cross bars C are made of wire or other metal and must be sufficiently
long to project at their ends beyond laths. The ends C1 C1 are turned in a ring in
order to hook on to small rings B and are twisted at right angles to the flat plane
of oval opening, so that when chain ladder is held so as to hang down straight the
wide oval opening of the cross bar should be parallel in its widest surface to the
ground, so as to allow lath to rest upon it.
of
:
our
Having now particularly described and ascertained the nature
invention and in what manner the same is to be performed we declare that
what we claim is
1. By our invention of cross-bars attached to rings and thence to chains we make
a metal ladder which is a strong, durable and perfect substitute for the web ladder
now in use.
2. By the use of these cross bars of metal no alteration of lath is required no
alteration of pulleys or turnover lath is needed and the ladder can be applied in a
few minutes by any unskilled person.
3. By our substitution of web as a turnover medium, for flat wide chain we claim
that our blind support will be stronger and more durable than a web turnover.
Dated this 17th day of June 1891.
FREDERICK GEORGE ENGELBACH,
Surgeon, Moretonhampstead, Devon.
DANIEL DINGLE,
Exmouth, Devon.