An Improved Reversing Gear for Steam Engines.
Year: 1898

page_text: Date of Application, 1st Jan., 1898-Accepted, 26th Mar., 1898
COMPLETE SPECIFICATION.
An Improved Reversing Gear for Steam Engines.
We, HERMANN MEYER, Merchant, and CARL VOESTE, Agriculturist, both of Briesen
(Westpreussen), in the Empire of Germany, 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 an improved reversing gear for steam engines which
differs from those hitherto used in the link being pivoted on a fixed point and driven
by only one eccentric on the crank shaft. In this reversing gear the reversing and
alteration of valve stroke are attained in a very simple manner. In the annexed
drawing the reversing gear is shown in two figures. Fig. 1 shows the same during
the normal forward movement of the machine, whilst Fig. 2 shows the reversed position
for backward movement.
On the main shaft a of the machine there is placed an eccentric b which rocks with
its rod b¹ the link A. The link is pivoted on a fixed gudgeon g and has two slots, a
larger one which is arranged near the gudgeon g and symmetrically to the same,
and a smaller one c, which lies on one side of the gudgeon g and with which smaller
slot the eccentric rod 61 engages. By loosening the screw nut c¹, the point of
adjustment of the rod b¹ in the slot c can be displaced and the stroke of the link A
can be changed.
In the slot there is guided the sliding block h, which is pivoted to the
connecting rod k; this latter is attached to the slide rod i. It can be seen from the
drawing that the oscillations of the link A cause the movement of the slide ¹ necessary
for distributing the steain in the cylinder of the machine, and that when the sliding
block h in the slot fis displaced upwardly until it lies above the turning point y, the
slide movement is reversed.
As
This displacement of the sliding block h in the slot f is effected by the reversing
lever 1, which swings on the fixed gudgeon p and moves the rod o, which is attached
at m to the connecting rod k. It is evident that on pressing the reversing lever
down, the sliding block h moves upwards in the slot f. In order to fix the lever in
its different positions, a rod q is guided along it, which rod operates the pawl S.
the latter engages the toothed arc m on the bracket n¹ the lever is fixed in each of its
positions. The spring operated handle r serves for moving the rod q and thus the
pawl S. To each position of the lever respectively of the sliding block h there will
correspond a certain movement of the slide and thereby a certain expansion, so that
the lever serves both for reversing and also for the regulation of the slide movement
and expansion.
Having now particularly described and ascertained the nature of this invention
and in what manner the same to be perforined we declare that what
claim is:-
we
An improved reversing gear for steam engines, comprising in combination the
pivoted link A, having the slot f symmetrical with regard to the pivot of the link, the
eccentric 6 on the crank shaft a, a fixed gudgeon g for said link A, the sliding block h

page_text: adapted to be moved in said slot f, connecting rod k, slide 1 lever 1, and rod o
connected to the rod k for the purpose of reversing or changing the travel of the
slide h in its slot f substantially as set forth.
Dated this 1st day of January 1898.
HERBERT HADDAN & Co.,
Agents to Applicants, 18, Buckingham Street, Strand, London.