Improvements in Shaft Couplings.
Year: 1893

page_text: Date of Application, 30th Nov., 1893
Complete Specification Left, 28th Aug., 1894-Accepted, 29th Sept., 1894
PROVISIONAL SPECIFICATION.
Improvements in Shaft Couplings.
MARK HENRY CRUMMIE, Engineer of The Bedford Engineering Co. Bedford,
in the County of Bedford do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in the construction of shaft couplings of
the type known as clamp or grip couplings.
The object of this invention is to provide a clamp or grip coupling that will grip
two shafts firmly and accurately when the two shafts are the same diameter or
when one shaft is considerably smaller than the other.
The essential feature of my invention consists in forming the coupling in two,
three, or more segments, and at the centre of the length of each segment, I make
the body of the segment so as to form a flexible or elastic loop of sufficient strength
to transmit the torsional strain from shaft to shaft & of sufficient flexibility to
allow of adjustments of the portions of the couplings which grip the ends of the
shafts.
The segments of the coupling are made in steel or other metal, and the segments
are fixed round the shafts by bolts or screws or any other suitable means of
clamping the parts together.
•
The drawings illustrate the manner of carrying out the invention, the same letters
of reference indicate the same or corresponding parts.
Figs. 1 & 2 show the coupling fixed to two shafts of the same diameter. Figs. 3
& 4 show the coupling fixed to shafts of different diameters.
In the drawings the coupling is in 3 segments marked A these segments are
shewn bolted together by the screws 6, the body of the segment is carried out to
form a loop a, and the particular advantage of this is shown in Fig. 3 where the
elasticity of the loop has been utilized to accommodate the different diameters of
the two shafts. The loop may be of the form shewn or any mere modification
thereof. B is an outer casing to form a pulley.
Dated this 30th day of November 1893.
MARK H. CRUMMIE.
COMPLETE SPECIFICATION.
Improvements in Shaft Couplings.
I, MARK HENRY CRUMMIE, of The Bedford Engineering Co. Bedford in the
County of Bedford 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 the construction of shaft couplings of the type known as
clamp or grip couplings.
The object of this invention is to provide a clamp or grip coupling that will
grip two shafts firmly and accurately when the two shafts are the same diameter or
when one shaft is considerably smaller than the other.
The essential feature of my invention consists in forming the coupling in two
three, or more segments and at the centre of the length of each segment, I make
the body of the segment so as to form a flexible or elastic loop, of sufficient strength
to transmit the torsional strain from shaft to shaft & of sufficient flexibility to
[PR |

page_text: allow of adjustments of the portions of the couplings which grip the ends of the
two shafts. The segments of the coupling are made in steel or other metal & the
segments are fixed round the shafts by bolts or screws or other suitable method of
bolting the parts together.
The drawings left with the Provisional Specification illustrate the manner of
carrying out the invention, the same letters of reference indicate the same or
corresponding parts.
Figs. 1 and 2 show the coupling fixed to two shafts of same diameter and Figs. 3
and 4 show the coupling fixed to two shafts of different diameters.
In the drawings the coupling is in three segments marked A.
These segments are shown bolted together by the screws or bolts b, the body of
the segment is carried out to form a loop a' and the particular advantage of this is
shown in Fig. 3 where the elasticity of the loop has been utilized to accomodate
the different diameters of the two shafts. The loop may be of the form shown or
any mere modification thereof.
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 shaft couplings the gripping or clamping of each shaft independently by
means of segments having an elastic loop at the centres of their length, substantially
as set forth in the accompanying Specification.
Dated this 27th day of August 1894.
MARK HENRY CRUMMIE.