Year: 1897

page_text: I, JOHN ALEXANDER MORRISON, of 388, Duke Street, in the County of the City
of Glasgow, Coal Merchant, do hereby declare the nature of my invention to be
as follows:-
-
This invention has reference to and comprises improvements in and relating
to advertising, by means of the exhibition of enlarged reproductions of advertise-
ments thrown on to a screen conveniently situated by means of an instrument
such as a magic lantern, mechanism being provided for automatically changing
the advertisements at fixed intervals of time.
In carrying into practice the improvements of this invention the advertisements
are painted or otherwise prepared on glass or other transparent medium on a
small scale and are mounted in a frame erected around the edge of a horizontal
disc. This horizontal disc is carried on a vertical spindle or shaft rusting in a
bearing in a plate which forms the lower part of a casing in which is mounted
a train of wheels driven by a spring or it might be by a weighted cord and
provided with a speed regulating flyer, by which the disc is revolved. Standards
are preferably erected around and below the outer part of the disc fitted with
small pulleys on which the disc rests and is steadied thereby. Bevel gearing
may be used for winding up the spring or weight.
In order to move the disc so as to change the advertisement at fixed intervals,
say of one minute, another clock-work arrangement, or train of wheels fitted with
a pendulum erected beneath the disc has secured on the end of one of its spindles
a stepped volute curved cam. This can revolving at a regulated speed of one
revolution per minute acts on one end of a lever fulcrumed on a standard gradually
raising the end until it arrives at the step when it is allowed to fall suddenly.
A projection is formed on this lever at each side of the fulcrum and pins or stops
on the under surface of the disc come into contact with these projections to alter-
nately allow the disc to move and to stop it for the fixed period. The pins are
fixed in pairs, one pair for each advertisement, in radial line, or nearly so, and
when the disc is standing the outer pin rests against the projection on the outer
end of the lever. The revolution of the cam gradually raises the inner end of the
lover and lowers the outer projection out of contact with its stop when the inner
pin comes in contact with the inner projection on the lever which in turn holds
the disc, but when the lever end falls over the step of the cam the disc is free
to revolve until the next outer pin comes into contact with the outer projection.
In this manner the disc revolves the space of one advertisement for each revolu-
tion of the cam.
Each transparent advertisement in turn passes between the enlarging lens and
the condenser of a magic lantern or other such instrument mounted in proper

page_text: position above the disc by a bracket or in any suitable manner, and is projected
on to any convenient screen in an enlarged form.
E
In some cases electricity may be used as the motive force.
Tinted the 27th day of N
1007
improvements in and relating to Advertising.
I, JOHN ALEXANDER MORRISON, of 388, Duke Street, in the County of the City
of Glasgow, Coal Merchant, do hereby declare the nature of my invention and
in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement in writing, reference being made
to the accompanying drawings:
-
This invention has reference to and comprises improvements in and relating
to advertising, by means of the exhibition of enlarged reproductions of advertise-
ments thrown on to a screen conveniently situated, by means of an instrument
such as a magic lantern, mechanism being provided for automatically changing
the advertisements at fixed intervals of time.
And in order that my said invention may be properly understood I have here-
unto appended an explanatory sheet of drawings in which Figure 1 is an elevation
and Figure 2 is a plan illustrating my invention.
In carrying into practice the improvements of this invention the advertisements
are painted or otherwise prepared on glass plates or other transparent medium
on a small scale, and these plates a are mounted in a frame A¹ carried by curved
standards A erected around the edge of a horizontal disc A. This horizontal
dise A is carried on a vertical spindle or shaft B resting in a bearing in a plate BI
which forms the lower part of a casing or frame in which is mounted a train
of wheels B driven by a spring contained in the barrel B³, or it
might be by a weighted cord, and provided with a speed regulating
flyer B, by which the spindle B and disc A are revolved. Standards C are
preferably erected around and below the outer part of the disc fitted with small
pulleys on which the disc rests and is steadied thereby. Bevel gearing as
indicated at D may be used for winding up the spring or weight.
In order to move the disc A so as to change the advertisement at fixed intervals,
say of one minute, or any period desired, another clockwork arrangement or train
of wheels carried within the casing E fitted with a pendulum is erected at one
side and below the level of the disc A. This train of wheels has secured on the
end of one of its spindles, extended for the purpose, a stepped volute curved cam
or as shown a double cam E. This cam E¹ revolving at any regulated speed say
of one revolution per minute acts on one end of a lever F fulcrumed on a stan-
dard F gradually raising the end until a pin f on it arrives at the step of the
cam E' when it is allowed to fall suddenly, a spring f acting on a pin f³ to
assure the sudden drop. An upper projection F is formed on this lever extending
to each side of the fulcrum and pins or stops a¹ a on the under surface of the
disc A come into contact with these projections to alternately allow the disc to
move and to stop it for the fixed period. The pins are fixed in pairs around the
disc, one pair a a² for each advertisement, in radial line, or nearly so, and when
the disc A is standing the inner pin a rests against the projection on the inner

page_text: end of the lever F. The revolution of the cam E' gradually raises the outer end
of the lever and lowers the inner part of the projecidon Fi out of contact with
its stop a when the outer pin a³ comes in contact with the projection F on the
lever which in turn holds the disc A, but when the lever end falls over the step
of the cam E¹ the disc A is free to revolve until the next inner pin a¹ comes
into contact with the projection F. In this manner the disc revolves the space
of one advertisement for each half revolution of the cam. It is preferred to
mount the lever a little off the radial line of disc A so that the pins a¹² do
not both touch it at the same time. Notches are formed on the edge of the disc A
and a light spring A³ is fitted to engage with these notches to prevent any re-
bounding of the disc when moved.
Each transparent advertisement in turn passes between the enlarging lens and
the condenser of a magic lantern or other such instrument mounted in proper
position above the disc A by a bracket or in any suitable manner, and is projected
on to any convenient screen in an enlarged form.
The body G of the lantern as shown is adjustably mounted within the frame A¹
on a frame formed of rods G supported on standards G2, and is suspended by
lugs or slings capable of being secured in any desired position by thumb-,
screws G the rods G¹ being slotted for this purpose.
The focussing tube G5 carrying the enlarging lens is also mounted outside of
the frame A in a similar manner.
Limelight, electricity, or any suitable luminant may be employed.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is:-
First. In an appliance for the exhibition of advertisements the construction or
the arrangement and combination of the parts all substantially as herein described
and illustrated by the accompanying drawings.
Second. In an appliance for the exhibition of advertisements of the class described
the combination of the frame carrying the advertisements to be exhibited, clock-
work mechanism for rotating same and for intermittently stopping same for fixed
periods, with illuminating and enlarging devices, all substantially as herein
described and illustrated by the accompanying drawings.
Third. In an appliance for the exhibition of advertisements of the class
described the combination of clockwork, mechanism actuating the cam E with the
lever and the pins on the disc A for the purpose of intermittently stopping
same all substantially as herein described and illustrated by the accompanying
drawings.
Fourth. In an appliance for the exhibition of advertisements of the class
described the mounting of a lantern body carrying a condenser within the frame A¹
and a focussing tube carrying an enlarging lens outside of said frame on the
rods G all substantially as herein described and illustrated by the accompanying
drawings.
NIS L1.07
1000