IMPROVEMENTS IN COUPLINGS FOR SHAFTING, AND IN HUBS for Wheels, PULLEYS, AND CRANKS
Year: 1874

page_text: LETTERS PATENT to August Brehmer, of Philadelphia, in the Stato of
Pennsylvania, in the United States of America, but at present of
23, Southampton Buildings, in the County of Middlesex, for the
Invention of "IMPROVEMENTS IN COUPLINGS FOR SHAFTING, AND IN HUBS
for Wheels, PULLEYS, AND CRANKS."
Scaled the 25th September 1874, and dated the 31st July 1874.
PROVISIONAL SPECIFICATION left by the said August Brehmer at the
Office of the Commissioners of Patents, with his Petition, on the
31st July 1874.
I, AUGUST BREHMER, of Philadelphia, in the State of Pennsylvania,
in the United States of America, but at present of 23, Southampton
Buildings, in the County of Middlesex, do hereby declare the nature of
the said Invention for "IMPROVEMENTS IN COUPLINGS FOR SHAFTING, AND IN
HUBS FOR WHEELS, Pulleys, and CraNKS," to be as follows :-
:-
The Invention-has-for-its-object-improvements -in-couplings-for-
shafting, and in hubs for wheels, pulleys, and cranks.

page_text: The body of the coupling is cast in one piece; it is formed cylindrical
on the exterior, and has a central hole formed therein to receive the
ends of two shafts to be coupled together. The body of the casting is
formed with longitudinal openings therethrough; these openings are so
located that when wedges, taper bolts, or screws are forced into them i
the weaker parts of the body of the casting, which are between the
openings and the hole for the shaft, will be forced towards the centre
of the coupling, and thus produce a pressure upon the shaft at thoso
The body of the coupling is cast in one piece; it is formed cylindrical
on the exterior, and has a central hole formed therein to receive tho
ends of two shafts to be coupled together. The body of the casting is
formed with longitudinal openings therethrough; these openings are so
located that when wedges, taper bolts, or screws are forced into them 5
the weaker parts of the body of the casting, which are between the
openings and the hole for the shaft, will be forced towards the centre
of the coupling, and thus produce a pressure upon the shaft at thoso
places.
By withdrawing the wedges or taper sorows or bolts the weak parts 1
acted upon thereby will return to their normal position, and thereby
relieve the shafts within the coupling.
The flexible or weak parts of the coupling are cut transvorsoly in the
centro, so as to separate the one end from the other, by which means the
coupling will readily adapt itself to any slight inequality in the diamotors 1
of the two shafts to be coupled together.
Instead however of employing couplings made as abovo described with
flexible portions capable of being forced against the shafts to be coupled
the coupling may be formed in one rigid picce, having a central hole
formed therein to receive the shafts to be coupled, and two openings 2
communicating with such contral hole to receive moveable taper or
wedge-shaped pieces, which are forced against the shafts to be coupled
by means of wedges, bolts, or taper screws.
I also form hubs for wheels, pulleys, and cranks in a similar manner
to that above described.
M
SPECIFICATION in pursuanco of the conditions of the Letters Patent,
filed by the said August Brehmer in the Great Seal Patent Office
on the 30th January 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, AUGUST
BREHMER, of Philadelphia, in the State of Pennsylvania, in the United 30
States of America, but at present of 23, Southampton Buildings, in the
County of Middlesex, send greeting.

page_text: WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirty-first day of July, in the year of
our Lord One thousand eight hundred and seventy-four, in the thirty-
eighth year of Her reign, did, for Herself, Her heirs and successors,.
5 give and grant unto me, the said August Brehmer, Her special licenso
that I, the said August Brehmer, my executors, administrators, and
assigns, or such others as I, the said August Brehmer, my executors,
administrators, and assigns, should at any time agree with, and no others,
from time to time and at all times thereafter during the term therein
O expressed, should and lawfully might make, use, excrcise, and vend,
within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN COUPLINGS
FOR SHAFTING, AND IN HUBS FOR WHEELS, PULLEYS, AND CRANKS," upon the
condition (amongst others) that I, the said August Brehmer, my
5 executors or administrators, by an instrument in writing under my,
or their, or one of their hands and seals, should particularly describe
and ascertain the nature of the said Invention, and in what manner
the same was to be performed, and cause the same to be filed in the
Great Seal Patent Office within six calendar months next and imme-
Odiately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said August Brehmer, do hereby declare
the nature of tho said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by
the following statement thereof, that is to say:—
:
5 The Invention has for its object improvements in couplings for
shafting, and in hubs for wheels, pulleys, and cranks.
The body of the coupling is cast in one piece; it is formed cylindrical
on the exterior, and has a central hole formed therein to receive the
the ends of two shafts to be coupled together. The body of the casting
O is formed with longitudinal openings therethrough; these openings aro
so located that when wedges, taper bolts, or screws are forced into them
the weaker parts of the body of the casting which are between the
openings and the hole for the shaft will be forced towards the centre of
the coupling, and thus produce a pressuro_upon-tho-shaft-at-those

page_text: receive the ends of two shafts b, b, to be coupled together. The body
of the coupling in Figures 1, 2, 3, 4 is formed with longitudinal
openings a¹ therethrough, as shown, which are so located that when
wedges c or taper bolts or screws & are forced into them the weaker
parts of the body of the casting, which aro between the open-
ings a and the hole for the shaft, will be forced towards the centro
of the coupling, and thus produce. a pressure upon the shaft at those
places.
:
"
By withdrawing the wedges c or taper screws or bolts.d the weak
parts a² acted upon thereby will return to their normal position, and
thereby relieve the shafts 6 within the coupling.
"
The flexible or weak parts a³ of the coupling are cut transversely in
the centre, as shown at Figures 2 and 4, so as to separate the one end
from the other, by which means the coupling will readily adapt itself to
any slight inequality in the diameters of the two shafts to be coupled
together.
Instead however of employing couplings made as above described with
respect to Figures 1, 2, 3, 4 with flexible portions a³, capable of being
forced against the shafts to be coupled, the coupling may be formed in
one rigid picce, as shown at Figure 5, having a central hole formed
therein to receive the shafts to be coupled, and two openings a³, a³,
communicating with such central hole to receive moveable taper or
wedge-shaped pieces e, which are forced against the shafts to be coupled
by means of wedges f, or by taper bolts or screws.
I also form hubs for wheels, pulleys, and cranks in a similar manner
to that above described.
Having thus described the nature of my said Invention, and the
mode in which I carry the same into effect, I would here remark that I
am aware that in the Specification of Letters Patent granted to Ben-
jamin Joseph Barnard Mills, dated August 26th 1873, No. 2810, a
coupling is described in which clamps are employed in connection with
taper wedges, screws, or bolts, but in such case the clamps are separated
from each other, and are connected to the body of the coupling at only
one part. I do not therefore.claim.as.my_Invention-the-construction of
couplings with clamps as therein described; but what I do claim is, the

page_text: novel construction of couplings and hubs for wheels, pulleys, and cranks
with flexible or weak portions a³ or with moveable portions a³ in manner
substantially as herein shown and described.
In witness whereof, I, the said August Brehmer, have hereunto
set my hand and seal, this Twenty-third day of January, in t
the year of our Lord One thousand eight hundred and seventy-
five.