An Improved. Friction Coupling.
Year: 1890

page_text: Date of Application, 2nd Aug., 1890-Accepted, 6th Sept., 1890
COMPLETE SPECIFICATION.
An Improved. Friction Coupling.
I, AUGUST SCHRÖDER, Engineer of Rheydt in the Kingdom of Prussia and
Empire of Germany, 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 :-
-
The invention hereinafter described has reference to a friction coupling for coupling
shafting, pulleys, cogwheels etc. The invention consists of a combined friction and
gearing coupling by which first the friction coupling and then the tooth coupling is
effected in such a manner that the engaging and disengaging of the parts which
have to be coupled is perfectly free from any jar or shock.
The invention is illustrated on the annexel drawing and may be described as
follows:-
:―
Fig. 1 shews the couplings as they are when coupled.
Fig. 2 shews the couplings as they are when uncoupled both shewn in longitudinal
section.
Fig. 3 represents in one half a front exterior view of the coupling and in the other
half an inner view shewing the teeth faces.
The invention has the following construction. a and bare the shafts to bo
coupled, c is a face plate keyed on to the shaft the said face plate c is provided
with a toothed inner rim d'and a plainly turned cylindrical face e. To the front
of the face plate c the ring f is screwed on by set screws as illustrated. On the
shaft a is mounted a bush upon which is fixed the coupling box so that it may
traverse in the direction of its length. The bush g is furnished on its inner extremity
which lies inside the recess of the face plate c with two bearings ii in which are
mounted two specially formed double armed levers k. The ends of these double levers
are furnished with spherical knobs which fit into two converging recesses formed
in the coupling box hand to the other arms of the same levers are connected
links m which at their other extremities are connected to the break-blocks n. These
break-blocks n are of such a width and so movable (in a somewhat inclined direction
almost parallel with the face of the toothed rim) that they rub first on the inner
face of the ring in moving outwards and then gear with their rear toothed faces o
into the toothed rim d of the face plate c. By a suitable longitudinal traversing of
the coupling box effected by means of the lever p and other suitable transferring
parts the coupling box h is moved to and fro upon the bush y. The recesses being
stationary in the coupling box ha movement of the break blocks in the radial direction
is effected. The .action of this apparatus is as follows:-In case the shafts a and b
have to be coupled together the ends of the levers k by the sliding of the coupling
box along the bush g get pushed out of the position represented in Fig. 2 and
brought into that illustrated in Fig. 1. The faces n¹ of the break blocks are thus first
brought in contact with the inner face of the ring and thus form the revolving
face plate c first the break blocks n and then the shaft a become slowly turned. By
further pushing of the break blocks into the hollow space, between the face c and the
ring such break-blocks n are caused to gear with their teeth o into the teeth d of
the face c whereby a strong coupling-connection is effected between the face
plate c the coupling box and the shaft a. In the disengaging of this improved
coupling the connection is first severed between the teeth and o and then by
further drawing back of the break-blocks n the connection is afterwards severed
between the friction faces.

page_text: Having thus particularly described and ascertained the nature of this my said
invention and in what manner the same is to be performed I declare that what
I claim is -
1st. The improved combination and arrangement of parts forming a combined
frictional and toothed gearing coupling all mounted and operating substantially as and
for the purposes hereinbefore described and illustrated on the accompanying
drawing.
2nd. In a combined frictional and toothed gearing coupling the employment of a
recessed face plate internally provided with a frictional surface and a toothed surface
and fitted with break blocks capable of being pushed into gear with the same by
double armed levers operated by a sliding coupling box provided with suitable
converging recesses substantially as and for the purposes described and illustrated on
the accompanying drawing.
Dated this 31st day of July 1890
JOHN G. WILSON,
Patent Office, 55, Market Street, Manchester, Agent for the Applicant.