Improvements in and in the Application of Mechanism for Producing Intermittent Rotary Motion.
Year: 1895

page_text: Date of Application, 2nd May, 1895-Accepted, 6th July, 1895
COMPLETE SPECIFICATION.
Improvements in and in the Application of Mechanism for Producing
Intermittent Rotary Motion.
We, Georg HALDKJER, of No. 32, Pilestraede, Copenhagen, and NIELS
DAVID JENSEN, of Aarelevgaard, Jutland, both in the Kingdom of Denmark,
Merchants, 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 mechanism for producing intermittent rotary motion,
or motion taking place in successive abrupt movements or "jerks" and to the
useful application thereof; and it will be best understood by reference to the
accompanying drawings in which
Figs. 1 and 2 are two plans or top views of the improved mechanism, represented
in two different positions ;
Fig. 3 is a side elevation of the mechanism; and Fig. 4 is a perspective view of
a street pillar or column for the display of advertisements, to which this mechanism
for imparting intermittent or "jerky "rotary motion is applicable. The mechanism
is constructed and arranged as follows.
A disc a with a turned-up edge or flange a¹ is secured to a spindle a² which is set
in rotary motion at a constant rate of speed, in the direction indicated by the
arrows m, Figs. 1 and 2, by means of properly regulated clockwork, by electricity,
or in any other convenient manner. The flange a¹ of the disc is provided with a
number of suitably spaced notches or slots bb62, the distance between which may
be either uniform or not.
In conjunction with this device we arrange a spindle e carrying a double arm or
lever d, the ends of which are provided with projecting pins f1f2, sufficiently
narrow to be capable of passing through the notches 6 61 12. By means of suitable
transmission gearing, or through any other convenient agency, the spindle c
receives motion from some source of motive power, such as a powerful spring for
example, which would constantly tend to turn the said spindle in the direction
indicated by the arrow n, Figs. 1 and 2.
As shown in Fig. 1, the pin f1, when in the position shown in that figure, is
arrested by the outer surface of the flange of the disc a. As the disc turns, the
notch will arrive opposite the pin f¹, thereby enabling such pin to pass through
the said notch, when the double arm or lever d will be swung round to the position
indicated in Fig. 2. In this position the pin f¹ will be retained by the flange a'
of the disc, but only by the inner surface thereof. Now when the notch 62 has
reached the position in front of the pin f¹, such pin will again be able to pass
through it, and consequently the double arm will be swung round and returned to
the position shown in Fig. 1; but in this case the pin will be in contact with the
outer surface of the flange of the disc. The double arm, and also consequently
the spindle c, will thus complete a revolution in four successive movements or
strokes.
The extent of such movements, and the intervals between them, will depend
upon the length of the arms, the number of notches, and the speed of rotation of
the disc a. It may therefore be varied at pleasure.
The intermittent rotary motion obtained by the aid of the mechanism above
described may be turned to account in a variety of ways.
Thus it may be
mentioned, merely by way of example, that it may constitute a valuable

page_text: attachment to advertising apparatus, or the means of advantageously displaying
various articles or exhibits, which may have to be placed on view. These and
kindred objects, instead of-as hitherto-remaining stationary or revolving at a
constant and uniform speed, may now be rotated intermittently, which kind of
motion is, better than any other, calculated to attract and arrest the notice of
spectators.
As an illustration of the practical application of our new mechanism, we have
shown in Fig. 4 a rotary pillar or column adapted for use in displaying bills or
posters, and to which mechanism, such as we have herein described, may with
advantage be applied. The mechanism is supposed to be enclosed within the base
or pedestal æ, the column or pillar proper y being mounted or pivotted upon the
spindle c of such mechanism.
The top of the column may be decorated in any suitable way and have several
statues or ornaments placed upon it, instead of one figure only as shown; and such
figures or statues, whatever their number, may be adapted to perform movements
imitating natural gestures, such as may now be seen in connection with fancy clocks,
musical boxes, and other toys, by adapting their starting or operating device to
engage a part of and be actuated at each motion of the column or other device
adopted.
Instead of applying the mechanism to a pillar such as this, it may, as will be
readily understood, be similarly employed in connection with glass show cases or
the like exhibiting goods for sale; also with small barrels filled with wine, beer,
and the like; or with hats or similar articles, for the purpose of imparting to same
intermittent motions and thereby displaying the goods from all points of view and
attracting attention.
Furthermore, mechanism such as is above set forth in reference to the pillar y
may be arranged within the stands of ornamental articles upon dinner tables, such
for example as what are known as "cabarets" or liqueur sets, fruit dishes, and so
forth, for automatically imparting intermittent rotation thereto and so changing the
positions of the contents.
And it will also prove very serviceable when applied to kiosks, panoramas, and
the like, for the purpose of automatically rotating same intermittently.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
:-
1. Mechanism for producing intermittent rotary motion, mainly consisting in the
provision of a disc a, having a turned-up edge or flange provided with notches or
slots through which pins, such as projecting from a double arm or lever d
are adapted to pass; such arm or lever being mounted upon a spindle e actuated
by a powerful spring or other convenient source of motive power, whilst the disea
receives uniform rotary motion through the medium of clockwork or in any other
suitable manner.
2. The employment and adaptation of mechanism such as is referred to in the
first claim for importing intermittant rotary motion to advertising apparatus,
bill-displaying pillars, show cases, kiusks, panoramas, table ornaments, liqueur sets,
and the like, it desired, in combination with statues or figures moved by mechanism
of their own, or with fancy clocks, musical boxes, or like objects, the operating
part of which will be actuated at each movement of said mechanism.
Dated this 2nd day of May 1895.