Improvements in Ventilators.
Year: 1895

page_text: Date of Application, 18th Jan., 1895-Accepted, 15th June, 1895
Improvements in Ventilators.
1, JULIUS JONAS, Manufacturer of Hochstrasse Cologne on the Rhine, in the.
Province of Rhineland and Kingdom of Prussia 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 :-
The invention refers to a room-ventilator with two fan-wheels attached one
behind the other. These wheels, which move in opposite directions, are driven by
the force of springs and produce chromatrope-like effects on account of their
different colouring.
The drawing represents the apparatus in section in Fig. 1, and in front-view in
Fig. 2. Figures 3 and 4 shew the spring mechanism on a larger scale, Fig. 3 in
section and Fig. 4 in front-view with the cover taken off. Figure 5 represents a
fan of the fan-wheels, likewise on a larger scale.
The ventilator consists chiefly of three parts; the small fan-wheel A, the large
fan-wheel B, situated behind A; and the spring-mechanism C situated behind B.
Each of the two fan-wheels consists of a rigid centre-disc a, which has at its
circumference a considerable number of fans b, at equal distances from each other
and forming any desired angle with the surface of the disc.
The fans of the wheel B. project beyond those of the wheel A, so that the latter
wheel allows of the former being visible on the whole circumference.
As material of which the fans may be made, there are on the one hand metals of
all kinds, as well in the form of plates as also in the form of wire gauzes; further
more wood plaited straw, reeds etc., paste board, paper, linen stuffs and fabrics of
all kinds; on the other hand glass, selenite, gelatine, gelatinized paper, tracing-
paper, tracing-linen etc.
The fans are painted in different colours with patterns, figures etc., so that on the
one fan-wheel moving to the left and the other to the right, pretty chromatrope
colour-effects are produced.
In order to heighten the latter, parts of the fans may be cut out or stamped out,
forming holes and figures of every description, such as are shewn in Fig. 5 and
marked c c. Furthermore in the fans which are made of metal, wood and similar
stiff materials, slides, which are movable in little frames, may be introduced. By
moving these slides the effect of the optical colour-play may be changed at will;
such a slide is shewn in Fig. 5 and marked d.
If the fans are made of paper, gelatine, linen, textures, tracing-linen etc., the
necessary rigidity may be obtained by a number of inlaid or only laid-on
longitudinal and cross strips forming a frame-work, or they may be bordered with
frames or borders of hard material such as lead, tin, wood, cane, ebonite,
celluloid etc.
The fans may be also made hollow, if they consist of a transparent substance
such as glass, etc., either in the shape of a hollow flat-body closed all round, or by
means of two transparent plates at a small distance from each other and joined
together at the circumference by other material such as putty etc. or by a metal
frame.
•
Coloured fluids or little coloured movable objects and things like moss, etc. may
be introduced into the hollow fans made in this manner, affording a pleasant change
to the eye.

page_text: The two fan-wheels are set in motion by the spring mechanism C in the following
manner:
The front fan wheel A is fastened to the axle e which passes through the cover
of the casing in which the spring mechanism is contained; this axle is made to
rotate by means of the toothed-wheels II and I, the latter of which lies directly
on the axle of the spring casing f. The hinder fan-wheel B is rigidly connected
with the socket g of the toothed wheel VI, lying on the axle e. The toothed-
wheel VI is made to rotate in a direction opposite to that of e by means of the
toothed-wheels V, IV, III, II.
The spiral spring k is held fast by the ratchet-wheel and the click i. The
spiral spring is wound up by turning the peg l.
This ventilator may be attached to windows, walls of rooms, articles of furniture,
pillars etc. in short where one wishes.
If the ventilator is put up in a dark part of the roon, such as on a wall with
dark paper, it is advisable to give it a light back-ground, say of white paper or a
mirror behind the ventilator in order to obtain a better effect of the chromatrope
colour-play.
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 :-
Room ventilator with two fan-wheels A. B. one behind the other, rotating in
opposite directions, the fans 6 of which are differently coloured and if desired
provided with cut out or stamped out openings c, for the purpose of producing
chromatrope-like effects during the rotation of the fan-wheels.
Dated this Eleventh day of January 1895.
For JULIUS JONAS,
Bernh. Brockhues.