Improvements in Apparatus for Automatically Displaying Advertisements, Pictures, and the like.
Year: 1891

page_text: Date of Application, 18th July, 1891
Complete Specification Left, 28th Aug., 1891-Accepted, 17th Oct., 1891
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Automatically Displaying
Advertisements, Pictures, and the like.
I, JOHN STIRLING YULE of 139 West George Street, in the City of Glasgow,
Commission Agent, do hereby declare the nature of this invention to be as
follows:-
This invention relates to apparatus for automatically displaying advertisements,
photographs or other pictures and for like purposes and the improvements have for
their object the provision in conjunction with ordinary clockwork mechanism and
with one or more rollers or drums whereon the matter to be displayed is contained,
of an escapement which shall automatically and at any desired intervals cause the
roller or rollers to be partially rotated and so as to display at each such partial
rotation a different subject matter.
The escapement consists of a cam keyed upon the main spindle of the clock and
of a lever arm separately centred and carrying a pin projecting from its side at
right angles and against which the cam acts. The forward end of the lever is
curved and has a notch about midway in its face. There is also attached to it by
screws or otherwise one extremity of a spring or pawl whose free end projects
beyond the curved face at or near the notch. The roller or drum has upon its
spindle a square plate each side of which is curved to correspond with the curved
end of the lever against which it bears so as to lock the roller or drum in position
after each partial rotation. There is also connected to the lever one end of a spiral
or like spring whose opposite extremity is attached to a fixed part of the mechanism
and from the plate on the end of the drum spindle there projects a number of pins.
The action is as follows:-
When the wider part of the cam in its rotation bears upon the pin projecting
from the lever the lever is depressed and its spring pawl rides over one of the pins
projecting from the square plate the movement continuing until the upper edge of
the spring pawl is below the said pin and the wider part of the cam at that moment
passing out of contact with the lever the said lever is by the action of the spiral
spring drawn back and in so moving the spring pawl acts to give the drum a partial
rotation.
When the drum is placed vertically the spring pawl is hinged at or about the
middle.
Dated thin Savant de 1901
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Automatically Displaying
Advertisements, Pictures, and the like.
I, JOHN STIRLING YULE of 139 West George Street, in the City of Glasgow,
Commission Agent, 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:-
This invention relates to apparatus for automatically displaying advertisements'
photographs or other pictures and for like purposes, and the improvements have
for their object the provision in conjunction with ordinary clockwork mechanism
and with one or more rollers or drums whereon the matter to be displayed is

page_text: contained of an escapement which shall automatically and at any desired intervais
cause the roller or rollers to be partially rotated and so as to display at each such
partial rotation a different subject matter.
As represented in the accompanying drawings in elevation at right angles to
each other at Figures 1 and 2 the escapement consists of a cam A keyed upon the
main spindle B of the clock C, and of a lever arm D separately centred and
carrying a pin d projecting from its side at right angles and against which the
cam A acts. The forward end of the lever D is curved and has a notch D¹ about
midway in its face. There is also attached to it by screws or otherwise one
extremity of a spring or pawl E whose face end projects beyond the curved face at
or near the notch D'. The roller or drum F, which is shewn broken off in
Figure 1, las upon its spindle ƒ a square or polygonal plate H each side of which
is curved to correspond with the curved end of the lever D against which it bears
so as to lock the roller or drum in position after each partial rotation. There is
also connected to the lever D one end of a spiral or like spring G whose opposite
extremity is attached to a fixed part of the mechanism at G and from the plate H
on the end of the drum spindle there projects a number of pins h. The action is as
follows-When the wider part of the cam A in its rotation bears upon the pin
projecting from the lever D the lever is depressed and its spring or pawl E rides
over one of the pins h projecting from the square plate H the movement continuing
until the upper edge of the spring pawl E is below the said pin and the wider
part of the cam A at that moment passing out of contact with the lever D, the
said lever is by the action of the spiral spring G drawn back and in so moving the
spring pawl E acts to give the drum F a partial rotation.
Figures 3 and 4 are front and end views shewing a frame or case containing a
number of drums F operated by the improved apparatus. The drums may be
operated as indicated by chain and pinion or other gearing from a single clockwork
arrangement or they may be operated in pairs or singly by separate clockwork
mechanism constructed as hereinbefore described.
Figure 5 shews an ornamental case fitted with horizontal drums and Figure 6
a casing with a vertical drum or drums the operating mechanism in each case being
concealed in the casing.
When the drum F is placed vertically the spring pawl E is hinged at or about
the middle as shewn at Figure 2.
The drums which may have any number of sides may in each case be fitted with
glazed panes and illuminated at night.
The cam A may be formed with any desired number of notches and may be fitted
on any rotating shaft.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is :-
1. Apparatus constructed and operated as described for automatically displaying
advertisements, pictures and the like.
2. In apparatus of the class set forth the combination of the cam A operated by
clockwork, the notched lever arm D the plate H on the drum spindle and
accessories for turning and locking the plate H, substantially as described.
Dated this Twenty-seventh day of August 1891.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.