Improved Device for Operating Display Sheets for Advertisements.
Year: 1889

page_text: Date of Application, 30th Aug., 1889-Accepted, 14th Dec., 1889
COMPLETE SPECIFICATION.
Improved Device for Operating Display Sheets for Advertisements.
We HENRY PINCUS and OAKLEY SELLECK both of the City of New York in the
County of New York and State of New York, United States of America, Gentlemen,
do hereby declare the nature of our invention for IMPROVED DEVICE FOR OPERATING
DISPLAY SHEETS FOR ADVERTISEMENTS and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
Our invention relates to devices for converting a continuous rotary motion into an
intermittent rotary motion and to be employed for the purpose of operating a wheel
serving to exhibit a series of pictorial or other advertisements.
The essential features of our invention are hereinafter fully described and illustrated
in the accompanying drawing in which,
Fig. 1. represents a partial side view and partial vertical section taken on the
linear fig. 3.
Fig. 2. represents a partial view.
Fig. 3. represents a horizontal section taken on the line y y. fig. 1. looking
downward.
Fig. 4. represents a like section taken on the line . . fig. 1. looking upward.
Fig. 5. represents a partial top view of a modification.
Similar letters of reference indicate similar parts.
The letter A indicates the frame of a motor which in this example is an ordinary
clock movement with a spring B for driving its parts. C indicates a wheel which is
intended to receive an intermittent rotary motion and which is usually constructed
with a circular range or series of frames for holding glass plates, or the like,
containing the objects to be exhibited. Said display wheel C, is mounted loosely on
one of the shafts, D, usually the main shaft, of said motor so as to turn freely thereon,
and to a suitable part of the wheel is secured one end of a coiled wire, forming a
spiral spring F, the other end of which wire is secured to the shaft D as by means of
a collar Don said shaft. To the loose wheel C is firmly secured a toothed wheel G
engaging with a lever I which has its fulcrum in a spindle J and one end of which is
hook shaped, its other end being left plain, said toothed wheel and lever forming
respectively an escape wheel and escape lever. Said escape lever I is firmly secured
to the spindle J and to said spindle is also secured a shifting arm N having a
slot N in which is fitted a pin Oi of a crank arm O secured to another shaft S of the
motor.
When the motor is put in operation, the shaft D receives a continuous rotary
motion and since one end of the spring F is secured to said shaft, the latter has a
endency to tighten said spring while the spring in turn has a tendency to impel the
wheel C. The escape lever I, however engaging the escape wheel G, arrests the
notion of the wheel C except at fixed intervals determined by the motion of said lever
roduced by the action of the crank arm O on the shifting arm N, or in other words
he escape wheel is released at fixed intervals and hence the display wheel C receives
n intermittent rotary motion under the impulse of the spring F by the continuous
otary motion of the shaft D of the motor.
In the example shown in figs. 1. and 2 the spring F is in vertical position and
rrounds the shaft while in the example shown in fig. 5 it lies in a horizontal
osition with one end connected to an arm D² of the collar D' on said shaft.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :
1st. The combination substantially as hereinbefore described of a motor, a display
wheel mounted loosely on a shaft of said motor, a spiral spring having one end
secured to the display wheel and the other end secured to said shaft, an escape
wheel secured to the display wheel, an escape lever, a shifting arm connected with
said lever and a crank arm connected with the shifting arm, for the purpose set.
forth.
2nd. The combination substantially as hereinbefore described of a motor, a display
wheel mounted loosely on a shaft of said motor, a suitable spring having one end
secured to the display wheel and the other end secured to said shaft, an cscape
wheel secured to the display wheel, an escape lever, a shifting arm connected with
lever and a crank arm, connected with the shifting arm, for the purpose set forth.
Dated this 30th day of August 1889
ALLISON BROS.,
Agents for the Applicants.