IMPROVEMENTS IN THE CONSTRUCTION OF COUPLINGS FOR SCREW-PROPELLORS AND OTHER SHAFTS
Year: 1881

page_text: LETTERS PATENT to Arthur Verity, of Bramley, near Leeds, in the County
of York, for an Invention of “IMPROVEMENTS IN THE CONSTRUCTION OF
COUPLINGS FOR SCREW-PROPELLORS AND OTHER SHAFTS."
PROVISIONAL SPECIFICATION left by the said Arthur Verity at the Office
of the Commissioners of Patents on the 24th May 1881.
ARTHUR VERITY, of Bramley, near Leeds, in the County of York.
"IMPROVE-
MENTS IN THE CONSTRUCTION OF COUPLINGS FOR SCREW PROPELLORS AND OTHER
SHAFTS."
My Invention consists of an arrangement of coupling whereby strained or bent
shafting or shafts at an angle to each other may be coupled together, and a rotary
motion transmitted from one to the other. These improvements are applicable to
screw propellor or other shafting.
The two ends of the shafts to be connected are recessed or cupped to receive a
ball which is inserted between them; this ball retains the axes of the end of each
shaft an equal distance from its centre without retarding or interfering with the
motion thereof. In order to retain the ends of the shafts in contact with the ball,
at the same time to allow of any eccentric or irregular movement thereof, I fit
bossed dises or coupling plates corresponding with each other on their respective
ends; these discs or plates have suitable projecting pieces or lugs which are
brought or geared together in a similar manner to a toothed clutch. The outer
end of one of the discs or coupling plates is made convex and a concave disc or plate
fitted thereon; this is made concentric with the herein before mentioned ball. The
plates are held together by studs or bolts in combination with the concave disc or
plate, and owing to the peculiar formation of which the discs or coupling plates
are held together, at the same time admitting of any irregular rotary movement
of the shafts caused by such shafting being strained, bent, or placed at an angle.
An ordinary compensating bearing may be used in combination with the herein-
before described coupling.

page_text: Fig. 1 is a longitudinal elevation; Fig. 2, a longitudinal section; Fig. 3, a front
elevation of coupling plate A; Fig. 4, a front elevation of coupling plate B; Fig. 5,
a back elevation of coupling plate A; Figs. 6, 7, and 8 are respectively an enlarged
part front elevation, section through A, B, Fig. 6, and plan of modifications in
detail for the same; Figs. 9, 10, and 11 are respectively a longitudinal elevation,
front elevation, and longitudinal section, shewing modifications in the general
construction of coupling.
The two end pieces c and d of the shafts e and f to be connected are recessed or
cupped at g and h to receive a ball i inserted between them, as shewn. This ball i
retains the axes of the ends of each shaft equal distances from its centre without
retarding or interfering with the motion thereof. In order to retain the ends c
and d of the shafts e and ƒ in contact with the ball i, at the same time to allow
any eccentric or irregular movement thereof, I fit bossed discs or coupling plates A
and B corresponding with each other on their respective shaft ends; these discs or
plates A and B have suitable projecting pieces or lugs j and ke which are brought
or geared together, as shown.
The outer end of one of the discs or coupling plates is made convex, and a
concave disc or flanged plate m fitted thereon concentric with the herein before
mentioned ball i. The disc or coupling plates A and B are held together by the
studs or bolts n in combination with the concave disc or plate m, and owing to
the peculiar formation of this disc or concave plate the discs or plates A and B are
not only held together, but at the same time admit of any irregular rotary move-
ment of the shafts e and f caused by such shafts being bent, strained, or placed at
an angle. Those parts of the lugs j and. that come together may be either
curved or straight, and the wearing of the surface may be compensated for by
adjustable slips o similar to that shewn at Figs. 6, 7, and 8.
In Figs. 9, 10, and 11, the ball i is received within cupped dies p, and for the
purpose of convenience of fitting or disconnecting the shafting the dies pare
arranged that they can be moved back (on the pin q being withdrawn) clear of the
ball i, or that the ball i can pass within the recess and so allow one shaft to be
removed without disturbing the other. In this arrangement the coupling plates,
as shewn at r, are formed on the ends of the shafts, and I employ two concave
discs or flanged plates 8 and t, having concave surfaces u and v provided on the
coupling plates to receive them. These concave plates s and t and the bolts w hold
the coupling plates together, at the same time admitting of any irregular move-
ment of the shafting. One or both sets of projecting pieces x may be recessed into

page_text: the coupling plates and held secure by bolts or screws y. The adjustable slips =
are of the same construction to that shewn and described at Figs. 6, 7, and 8.
Having now described the nature of the said Invention and described by the
aid of Drawings how the same may be carried into practice, I would have it
understood that I do not limit myself to the precise details or configuration of the
various parts I have described and shewn, but what I do claim and desire to be
secured to me by Letters Patent is,―
The arrangement, construction, and combination of the various parts forming
the coupling, substantially as and for purposes herein setforth.
In witness whereof, I, the said Arthur Verity, have hereunto set my hand
and seal, this Twentysecond day of November, in the year of our Lord
One thousand eight hundred and eighty one.
וד ברד..
ARTHUR VERITY
(LAS.)