An Improved Device for Stopping or Fixing Intermittently Rotated Discs or Wheels, Rollers, and the like
Year: 1894

page_text: Date of Application, 8th Dec., 1894-Accepted, 12th Jan., 1895
COMPLETE SPECIFICATION.
An Improved Device for Stopping or Fixing Intermittently
Rotated Discs or Wheels, Rollers, and the like.
I, JULIUS WREDE, of 6, Exercierstrasse, of Berlin, in the Kingdom of Prussia,
German Empire, Manufacturer 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 a device for stopping or fixing discs, wheels, rollers and
the like, which are rotated intermittently. Referring to the accompanying
drawing, a is a disc of the kind stated provided in its rim with recesses a' adapted
to receive the head of a bolt b. The latter may be moved up or down in vertical
direction, and is provided with a recess b' adapted to receive the point of a pawl c
secured to the free end of a slide d, and pressed into said recess b¹ by a flat spring c¹.
Slide d is at its other end acted on by a spiral-spring e, and is guided by a frame f
guiding the bolt b, too.
A large slide 9 moved to and fro along the lower edge of frame
is provided
with a broad slot g¹, into which takes a pin 62 secured to the lower end of bolt b.
A projection fixed to said slide g pushes upon the lower arm of a small double-
armed lever fulcrumed at to frame f. The upper arm of said lever takes into
a slot of slide d; the latter, therefore, is withdrawn, and spring e compressed,
as soon as lever his turned. by said projection 92 of the main-slide g.
Whilst slide d
is withdrawn, pawl c is turned by spring c¹, until a small projection c³ of said pawl
comes upon a corresponding projection of slide d. The pawl cannot further be turned
now by spring c¹, and is consequently drawn out of the recess 6' of bolt b, the latter
being thus freed.
A lever i situated within slot g¹ of slide g, and fulerumed at g³ to the projection g³
of said slide, is at its free end provided with a projection i¹, the upper and lower
surface of which is sloping. Said lever i is held against the upper slot-stay of
slide 9 by means of a spring k, and causes the bolt 6 to move downwards as soon
as projection of lever i catches with its sloping front-surface over pin 62 of said
bolt. It will be seen, that bolt b can now be drawn downwards, as pawl c is kept
off the recess b' by the influence of projection 92 upon slide d by the mediation of
lever h.
As soon as the head of bolt b has left the respective recess a¹ of disc a, the
latter is free to rotate; but whilst slowly rotating, slide has been farther
displaced in the direction of the arrow, so that pin 62 of bolt 6 becomes free of
the projection of lever i. Bolt b, which is under the influence of a spring (not
shown) tending to pass said bolt constantly upwards, is now pressed upwards by
said spring, so that the head of the bolt glides upon the periphery of disc a, i.e. upon
that part of the periphery lying between the recess just left by said head, and the
neighbouring one.
After pin has become free of the part i', the direction of motion of the main-
slide
is changed, and the position of the parts g², hand d becomes again that shown
in the drawing. Instantly thereafter, the next of the recesses a¹ of disc a arrives
over the bolt b, and the head of the latter now enters the respective recess
to stop thereby the further movement of disc a, and to fix the latter.
Bolt 6 itself is fixed in its position by the pawl c re-entering the recess b¹ of
said bolt.
so as

page_text: The improved arrangement above described is intended for the use in such
machines, in which the power tending to turn disc a is a rather great one.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what 1
claim is:-
1. In a device for stopping or fixing intermittent rotated discs, wheels, rollers
and the like, the combination with a bolt adapted to take into a recess of the part
to be stopped or fixed, of a pawl adapted to take into a recess of said bolt, the part
carrying said pawl being adapted to be moved in the direction to the said bolt, for
the purpose as described.
2. In a device for stopping or fixing intermittently rotated discs, wheels,
rollers and the like, the combination with a bolt adapted to take into a recess
of the part to be stopped or fixed, of a slide arranged rectangularly or nearly
rectangularly to said bolt, and having a pawl adapted to take into a recess of the
latter; said slide being adapted to secure the stopping- or fixing-position of the
said bolt by means of said pawl, for the purpose as described.
3. In a device for stopping or fixing intermittently rotated discs, wheels, rollers
and the like, the combination with a bolt adapted to take into a recess of the part
to be stopped or fixed, and with a pawl adapted to take into a recess of said bolt,
and being attached to a part adapted to be moved in the direction to the said bolt,
of a slide having means adapted to cause the pawl to be drawn out of the recess of
the bolt, and the latter to be drawn out of the part stopped or fixed, for the purpose
as described.
4. In a device for stopping or fixing intermittently rotated discs, wheels, rollers
and the like, the combination with a bolt adapted to take into a recess of the part
to be stopped or fixed, and with a slide arranged rectangularly or nearly rectangularly
to said bolt, and having a pawl adapted to take into a recess of the latter, of another
slide having means adapted to cause the former slide to be moved off the bolt so as
to draw the pawl out of the latter, and said bolt to be drawn out of the part stopped
or fixed, for the purpose as described.
5. In a device for stopping or fixing intermittently rotated discs, wheels, rollers
and the like, the combination with a bolt 6 adapted to take into a recess of the
part to be stopped or fixed, of a slide d arranged rectangularly or nearly
rectangularly to said bolt, and having a pawl c adapted to take into a recess b₁
of the latter, of another slide having a projection 92 adapted to turn a lever h
taking into a recess or slot of slide d, and having a pawl or lever i adapted to
withdraw the bolt 6 by means of a projection ', the latter having a sloping front-
surface making the pawl or lever apt to act on said bolt, and a sloping rear-
surface making the pawl or lever apt to be acted on by the said bolt, substantially
'as described.
Dated this 8th day of December 1894