Improvements relating to Automatic Advertizing Machines.
Year: 1898

page_text: Date of Application, 7th Feb., 1898-Accepted, 14th May, 1898
COMPLETE SPECIFICATION.
Improvements relating to Automatic Advertizing Machines.
We, JAMES MAJOR, of 28, Cannon Street, Mechanical Draughtsman, and CHARLES
TAYLOR, of 26, Wellington Road, Plumber and Gas Fitter, both of Eccles, in the
County of Lancaster, 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: —
These improvements relate to that class of automatic advertizing machines
wherein a disc on which the series of advertisements to be displayed is mounted
in removable slides, such disc being caused by suitable clockwork to revolve inter-
mittently between a lantern illuminated by gas or electric light and an "objective"
or combination of lenses for projecting the same onto a transparent screen so as to
exhibit each advertisement for a certain definite time and then change it for the
next and so on in succession until the whole series has been exhibited; as described
in Complete Specification No. 22082 of 1897.
The improvements will be readily understood on reference to the two sheets of
drawings hereunto annexed and the following explanation thereof.
On Sheet 1 of the drawings, Figs. 1, 2 and 3 illustrate the construction of an
improved switch" for making and breaking the electric contact so as to turn the
electric light on and offat the lantern at any predetermined periods.
.
"
Fig. 4 illustrates an improvement applicable to the escape lever which works the
slide wheel or disc, and Fig. 5 illustrates an improved slide holder and catch for
facilitating the changing of the slides containing the advertisements.
On Sheet 2 of the drawings, Fig. 6 illustrates an improved arrangement for
mounting the electric-arc lamp in the lantern whereby the correct adjustment
of the arc in the exact focus of the condensing lens is facilitated.
Referring to Sheet 1 of the drawings y (Fig. 3) represents the graduated and
numbered disc with its fixed finger or projection Z and movable stop in connec-
tion with the clockwork as described in my Complete Specification No. 22,082 of
1897, before referred to. When applying this disc y to the regulation of the electric
light (instead of to a gas tap) we employ a drum (Figs. and 3) which has a
constant tendency to rotate owing to the weighted cord 26 which is wound around it.
The drum is prevented from revolving by a bolt 27 the lower end of which
catches against one of the three ratchet teeth 1, 2, 3 with which the edge of the
drum is provided. When one of the fingers or stops z or z¹, as the disc y revolves,
lifts the bolt it allows the drum to escape and turn one third of a revolution.
This actuates a rotating switch 28 which is provided with two insulating plates
and a metallic segment working between or in contact with two springs (or a
spring) and thus completing or interrupting the circuit along the wire g* of the
electric lamp.
Fig. 4 shows an improved form of catch q for actuating the notched plate p to
which the wheel or disc containing the advertisement slides is connected (see also
Fig. 2 Sheet 1 of the drawings annexed to our Complete Specification No. 22,082
of 1897 before referred to). According to our present improvements we prefer to

page_text: provide the catch lever
with an arm in the form of a spring s acted on by the
pins or teeth t of the wheel u driven by the clockwork. A set-screw q¹ is provided
on the catch q which is mounted loosely on its fulcrum, the end of the set-screw.q
being acted upon by the springs so as to raise the catch q only a sufficient distance
to disengage it from the notches in the disc p. This arrangement renders the
change of advertisements certain and instantaneous and prevents vibration after
the change.
Fig. 5 shows the application to one of the frames ¹ containing the advertisement
slides of a swivelling catch or finger 2 fitted on the frame in which each slide
is carried on the main revolving wheel or disc.
The finger is notched at to grip the edge of the slide and is provided with
a spring to keep it in place when adjusted.
Referring to Fig. 6, Sheet 2, g is the lantern, i the " objective" and the con-
densing lens, gl and g are the two carbon points of the arc lamp which rests
in a cradle g so supported as to be capable of being raised and lowered by a screw g
and rocked on its centre g6 by the adjusting screw g7 so as to bring the electric
arc exactly into the focus of the condensing lens.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:-
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1. The combination with automatic advertising machines of the class herein-
before referred to of the improved automatic switch for making and breaking
the electric contact so as to turn on" and "off" the electric light at the lantern
at any predetermined periods.
"
2. The combination with such automatic advertising machines of the improved
catch or escape lever for controlling the intermittent action of the main slide wheel
or disc.
3. The combination with such automatic advertizing machines of the improved
spring catch or clip for the slide holder for facilitating the changing of the slides
containing the advertisements.
4. The combination with such automatic advertizing machinės of the improved
arrangement for mounting the electric-arc lamp whereby the correct adjustment
of the arc "in the exact focus of the condensing lens is facilitated.
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All substantially as herein before described and illustrated by the drawings
annexed.