IMPROVENTS IN SHAFT COUPLINGS
Year: 1885

page_text: I HENRY EDWARD NEWTON of the Office for Patents, 6, Bream's Buildings
Chancery Lane in the County of Middlesex, Civil Engineer do hereby declare the
nature of the invention for IMPROVENTS IN SHAFT COUPLINGS to be as follows:-
This invention relates to shaft couplings which are composed of two halves or
longitudinal sections provided with bolts connecting them, and which are par-
ticularly intended for use in connecting broken propeller shafts of steamers, but
which may also be used for connecting other shafts when broken. Clamping
couplings of this class are shown and described in the Specification of Letters
Patent granted to John Garrett Tongue, dated December 8th 1874 N° 4223.
The object of this invention is to provide a coupling which in case of a fracture
close to one of the flanged couplings or the thrust bearing of the shaft, may be
secured thereon as a substitute for one part of the ordinary flanged coupling or
which may serve as a thrust collar in case the break is close to the thrust
bearing.
The invention consists in a novel construction of the two part coupling.
The two parts of the clamping coupling are provided with flanges through which
pass bolts which serve to clamp the parts of the coupling tightly upon the shaft.
This coupling has a cylindric bore at each end only, and between the ends for a
considerable portion of the length of the coupling is chambered out or constructed
with an internal cavity so that when the coupling is clamped upon the shaft it will
have a bearing thereon at isolated points only, which are at a considerable distance
from the fracture. The parts of the coupling are each provided with inwardly
projecting tongues or lugs and when a coupling is to be applied to a shaft, the
latter is grooved or channelled to receive tliese lugs or tongues and thereby the
parts of the coupling will be securely locked to the two parts of the fractured shaft.
In lieu of providing tongues or lugs on the parts of the coupling holes may be.
Price 8d1

page_text: drilled in the coupling and shaft after the coupling is clamped upon the shaft, and
radial pins inserted through the coupling and into the shaft.
The coupling has at one end a flange in which are holes. The construction of
the coupling with this flange enables it to be employed in cases where the break in
the shaft is close to a flanged coupling of the ordinary kind.
In such cases one half of the ordinary flanged coupling is knocked or cut off, and
my improved coupling being secured in place thereon may be bolted securely to the
other half of the flanged coupling by bolts inserted through the holes in the flange.
The construction of the coupling with this flange also enables it to serve the
purpose of a thrust collar on the shaft when the break thereon is close to the thrust
bearing.

page_text: I HENRY EDWARD NEWTON, of the Office for Patents, 6 Bream's Buildings,
Chancery Lane in the County of Middlesex, Civil Engineer, 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 shaft couplings which are composed of two halves or
longitudinal sections provided with bolts connecting them, and which are par-
ticularly intended for use in connecting broken propeller shafts of steamers, but
which may also be used for connecting other shafts when broken. Clamping
couplings of this class are shown and described in the specification of Letters-
Patent granted to John Garrett Tongue, dated December 8th 1874, No 4223.
The object of this invention is to provide a coupling which, in case of a fracture
close to one of the flanged couplings, or the thrust bearing of the shaft, may be
secured thereon as a substitute for one part of the ordinary flanged coupling, or
which may serve as a thrust collar in case the break is close to the thrust
bearing.
The invention consists in a novel construction of the two-part coupling as
particularly hereinafter described and pointed out in the claims.
In the accompanying drawing, Figure 1 is an outside view of two portions of a
shaft and a coupling uniting them, and embodying the present invention. Fig. 2
is an end view of a two-part coupling; Fig. 3 is a side view representing a shaft
at the point of fracture, and a face view of one part of the coupling applied
thereto; Fig. 4 represents two sections of a shaft connected by an ordinary flanged
coupling, the bolts being omitted, and one shaft section being fractured close to the
coupling; and Fig. 5 represents the fractured section as having one part of the
improved coupling applied thereto, and employed in connection with the ordinary
flanged coupling upon the other section of shaft.
Similar letters of reference designate corresponding parts in all the figures.
A A designate two portions of a shaft which has become fractured at a, and B B.
designate the two parts of a clamp or coupling which are provided with flanges b,
and with bolts & passing through these flanges, and serving to clamp the parts of
the coupling tightly upon the shaft. This coupling has a cylindrical bore b² at
cach end, and between the ends, for a considerable portion of the length of the
coupling, is chambered out, or constructed with an internal cavity, b³, so that when
the coupling is clamped upon the shaft, it will have a bearing thereon at isolated
points, which are at some distance from the fracture.
The parts B of the coupling are each provided with inwardly projecting tongues
or lugs, and when a coupling is to be applied to a shaft, the latter is grooved or
channelled as represented at a¹ to receive these tongues or lugs b, and thereby the
parts of the coupling will be securely locked to the two parts of the fractured
shaft. In lieu of providing tongues or lugs b' on the parts of the coupling, they
may be destitute of any such tongues or lugs, and after the coupling is clamped
upon the shaft, holes may be drilled thereinto, and radial pins inserted through
the coupling, and into the shaft, as is shown in English Letters Patent hereinabove
referred to.

page_text: The coupling has, at one end, a flange B¹, in which are holes *. The
construction of the coupling with the flange B' enables it to be employed in cases
where the break in the shaft is close to a flange coupling of the ordinary kind,
and enables the improved coupling to be coupled directly with one half of the
ordinary flange coupling. Figures 4 and 5 illustrate the manner of so using the
coupling. In figure 4, the two shaft sections A. A are shown as connected by
the ordinary two-part flange coupling C. C, and one of the shaft sections is supposed
to be fractured at a, close to the coupling part C. In such cases, the coupling
part C, on the fractured shaft, will be removed, and the two portions of the
fractured shaft connected by the two-part coupling, as shown in Figure 5, and then
the two part coupling may be connected with the ordinary flanged coupling part C
on the unfractured shaft section A, by ordinary coupling bolts passing through the
flange B, and the adjacent flange of the ordinary coupling part C-This con-
struction of coupling is very desirable, as it will be readily seen that the two-part
clamping coupling could not be applied to the shaft fractured in the position shown
with the ordinary flanged coupling part still on the fractured shaft section.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, as communicated
to me by my Foreign Correspondent, I declare that what I claim is
A two-part coupling for a fractured shaft provided with a flange B' substantially
as herein described.