Year: 1888

page_text: Engineers, Cannstatt, Germany.
I PAUL PFLEIDERER of 86 Upper Ground Street Blackfriars Bridge London S.E
Engineer do hereby declare the nature of my said invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
In reversible dough brakes as used hitherto great loss of efficiency and time is
caused by the necessity of shifting the straps or an injurious shock in the process of
reversing spur wheels is incurred.
These drawbacks are to be remedied by this invention.
The dough brake according to this invention is illustrated on accompanying
drawing and as shown in Fig. 1 it mainly consists of a flanged bottom roller & resting
in stationary bearings a fixed on stands or frames a and a top roller c which rests in
moveable bearings a². These bearings a² are adjustable and thus by means of a
handle d, acting on the two vertical screw spindles d' through the conical spur
wheels d³, d³, the roller c is adjusted and is constantly kept parallel to roller
increasing or decreasing the distance between the two rollers, b and c,-i.e. the
thickness into which the dough is to be rolled.
A fixed hand e serves as an index of this thickness, it is connected with a spur
wheel e', its face forming a dial and its teeth being geared into a smaller spur
wheel, which is fixed on the shaft of the conical spur wheel d³. The rollers b, and
which work in opposite directions, receive their revolving motion from the shaft f
by means of four spur wheels. These spur wheels are guarded by wheel guards g¹.
On the shaft is fixed a disc with double friction cone.
c,
The loose pulleys h and h¹ driven one by an open and the other by a crossed belt
are thrown into gear with or made to alternately clutch the respective conical rings of
the disc g. They are constantly in motion and are guided by a stirrup h² the fulcrum

page_text: or pivot of which is fixed to the stand a. The said stirrup 2 is connected with the
shifting rod through rod i an excentric and flat spring 2.
Thus in pulling out or pushing in the rod k the fixed disc g by means of its conical
projections becomes coupled either with pulley h or thereby giving motion to the
rollers and and moving the dough either forwards or backwards. Through this
arrangement either of the pulleys and can almost instantaneously be thrown into
action without any shock. By placing the rod k in the central position both the
pulleys and are disengaged and act as loose pulleys on the driving shaft g.
Instead of having the conical rings or projections near the circumference of the
disc the coupling may be effected near the centre as shewn in Fig. 2 in which case
it is found very convenient to employ a coupling constructed on Weston's friction
principle. In such case the flat spring is replaced by a lever which is acted upon
by the rod and similarly to the arrangement in Fig. 1 will effect the stoppage or
starting of the machine.
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 I
claim is :-
In reversible dough brakes or kneading machines the arrangement which effects a
smooth and noiseless reversing by two pulleys. h and 1 (revolving in opposite
directions), alternately made to clutch the friction disc through the agency of an
oscillating stirrup or double lever of horseshoe shape ² acted upon and constructed as
described.