Improvements in Advertising Devices.
Year: 1898

page_text: Date of Application, 19th July, 1898-Accepted, 4th Feb., 1899
COMPLETE SPECIFICATION.
Improvements in Advertising Devices.
I, ALEXANDER MELVILLE CLARK, of the Firm of A. M. & Wm. Clark, of
53, Chancery Lane, in the County of Middlesex, Fellow of the Chartered Institute
of Patent Agents, do hereby declare the nature of this invention (a communication
to me by the United States Printing Company, of 85 to 101, North 3rd Street,
Borough of Brooklyn, City, County, and State of New York, United States of America)
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 advertizing devices, and will be described with reference
to the accompanying drawing in which Figure 1 is a plan view of one form of
device embodying the invention, Figure 2 is a front view of the base plate upon
which the advertizing matter may be placed, Figure 3 is a section on the
line 3-3 of Figure 1, Figure 4 is a face view of an apertured rotary shield, and
Figure 5 is a face view of a multi-coloured apertured rotary colour plate.
In the drawing a is the base or base plate which is preferably a card bearing
advertizing matter arranged on one or more concentric paths around an aperture
or centre b. The colour plate c, which is shewn as centrally perforated, is placed
over the advertizing matter concentric with the centre b. This colour plate is
apertured, preferably by radial apertures c¹, which preferably extend from the
hub-like centre c² to the rim c3 of the colour plate c. This colour plate inay be
suitably coloured. In the present instance it is shewn as coloured to represent
a pair of adjacent crosses, one cross being made up of four arms containing
colours or shades represented by black 1, blue 2, and green 3. These colours
are, or may be, arranged as shewn in concentric band-like segments along the arms
of the cross, similar colours being at similar distances from the centre of the colour
plate. The other cross, which is adjacent to the cross just described, likewise
presents concentric band-like colour segments arranged along the arms of the cross
as before; the band-like segments or portions of the two crosses, which are
adjacent to each other, being of contrasting colours or tints. The colour plate c is
covered by a cover plate or shield d preferably apertured centrally and provided with
a series of band-like segmental apertures 4, 5, 6, and 7, arranged concentrically
around the centre or central aperture 8. An eyelet or other pivotal fastening unites
the three plates a, c, d, so that the plates c and d may turn readily upon the said
eyelet, one or the other of the said plates being preferably polygonal while the other
is preferably round. In the present instance the plate d is shewn as polygonal and
the plate c as round. One of the said plates must be heavier than the other so that
it will store up a greater amount of energy and cause the plates to rotate at different
rates of speed.
In using the device the rotary plates c d (or one of them) project beyond the
edge a¹ of the base so that the finger of the operator may be passed sharply along
the said edge and striking the said plate or plates will set them rotating, the optical
illusion known as "persistence of vision" taking place and allowing the advertizing
matter which lies beneath the apertures in the rotary plates to be readily read or
observed and at the same time the said plates rotating at different rates of speed,

page_text: there will be a series of colour changes observed giving a general chromatrope effect,
it being understood that the advertizing matter lies beneath the apertures in the
rotary plates.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. In a device of the character described, the combination of the base provided with
advertizing matter and an apertured rotary plate covering the said advertizing matter
and projecting beyond an edge of the base.
2. In a device of the character described the combination of a base, an apertured
rotary colour plate, and an apertured rotary cover plate, combined with advertizing
matter visible through the apertures in the plates when they are rotated whereby the
advertizing matter inay be observed when the plates are rotated or swung and a
chromatrope effect likewise produced.
3. In a device of the character described the combination of a base containing
advertizing matter and a plurality of apertured rotary plates covering the said
.advertizing matter, the apertures of the said two rotary plates being out of register
with each other whereby, upon rotating the said plates at different speeds, the said
advertizing matter may be observed with varying effect.
4. In a device of the character described the combination of a base, an apertured
colour plate provided with colours in concentric bands, and a rotary cover plate
provided with concentrically-arranged segmental apertures corresponding with the
bands of the colour plate.
5. In an advertizing device the combination of a base containing advertizing
matter and provided with concentric bands of colour and an apertured rotary cover
plate covering the said colour plate and provided with concentrically arranged band-
like apertures, one or both of the said rotary plates projecting beyond an edge of the
base.
6. The herein described advertizing device constructed to operate substantially as
described.
1011
A. M. & WM. CLARK,
Chartered Patent Agents, 53, Chancery Lane, London.