Improvements in or connected with Means for Raising and Lowering Window Blinds.
Year: 1893

page_text: Date of Application, 14th Apr., 1893-Accepted, 17th June, 1893
COMPLETE SPECIFICATION.
Improvements in or connected with Means for Raising and
Lowering Window Blinds.
I, GUSTAV HARTMANN, of 10 Mühlenstrasse, Eiserfeld, Westphalia, in the
Empire of Germany, Student, 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, reference being had to the
accompanying drawings and to the figures and letters marked thereon:-
Figure 1 is a front view and Figure 2 is an end view representing my
improvements applied to the roller of a roller blind.
Figure 3 is an inner face view and Figure 4 is a front view of the fixed fitting
for carrying one end of the roller, and
Figure 5 is a front view and Figure 6 is an end view of the fitting attached to
the roller.
The raising and lowering of roller blinds and the holding of the same at any
height are effected, according to my invention, in the following manner.
a is a wooden block which is fixed to the wall or to the window frame in position
to carry one end of the roller; this block a has fixed thereto on one side the
supporting plate b, and on the opposite side two small pulleys c c.
The supporting
plate 6 consists of a flat piece of metal having a slot 6 to receive the centre pin at
one end of the roller, which slot is, at its lower end, of an angular form and acts, as
hereinafter described, to prevent rotation of the roller. The roller has at one end
a pulley g and a centre pin d, which latter has a triangular part e which alone
passes through the slot 6' in the supporting plate b. When the blind is at rest the
triangular part e rests in the angular bottom of the slot 6' and thereby prevents any
accidental rotation of the roller and consequent lowering of the blind.
The cord his wound twice round the pulley g of the roller and is then passed over
the two small pulleys cc and the ends, after one has been passed through the eye
of a "pull" or handle i, are attached together.
By pulling at the "pull" or handle i, the triangular part e of the centre pin d is
lifted away from its angular seat at the bottom of the slot b', so that the pin d,
which, when at rest, is at a certain distance below the wooden block
brought up so as to bear against the latter, as shown at Figure 5.
is now
Having thus disengaged the triangular part e of the centre pin d from its angular
seat in the slot b¹, it is only necessary to pull at either the one or the other branch
of the cord h in order to raise or lower the blind as may be required. As soon as
the "pull" or handle i is released, the triangular part e of the centre pin d drops
again into its angular seat in the slot 61 and thereby prevents any further movement
of the blind.
It will be evident that a cord may be used to raise the triangular part e out of its
seat in the supporting plate b and a separate cord may be used for rotating the
roller.
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 :-
:-
1. In means for raising and lowering roller blinds, the combination of a blind
roller fitted at one end with a pulley 9 and a centre pin d having a triangular
part e, a wooden block a fitted with two small pulleys cc, and a supporting plate b
having a slot 6 formed with an angular bottom, and suitable means for lifting the
triangular part e of the centre pin out of its seat and for rotating the roller,

page_text: whereby the blind may be raised and lowered and securely held in any desired
position, substantially as herein shown and described.
2. The combination with the parts a, b, b, c, d, e and g, of a cord / passed twice
round the pulley or end g of the roller and thence over the small pulleys c c, and a
"pull" or handle i threaded on or otherwise carried by the cord h, so that when
such "pull" or handle i is pulled down, the triangular part e of the centre pin is
raised from its seat in the supporting plate b and the roller can be rotated, and, by
releasing the handle, the part e is allowed to fall again to its seat, substantially as
herein shown and described and for the purpose stated.
Dated this 14th day of April 1893.
GUSTAV HARTMANN,
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.