An Improved Coupling or Joint for Connecting Rods or Shafting or Tubes of any Description.
Year: 1886

page_text: Date of Application, 22nd Mar., 1886.
Complete Left, 21st Dec., 1886.
Complete Accepted, 21st Jan., 1887.
An Improved Coupling or Joint for Connecting Rods or Shafting
or Tubes of any Description.
I, THOMAS HUNGATE PRESTON DENNIS, of Chelmsford, Essex Engineer and
Ironmonger do hereby declare the nature of my said invention to be as follows:-
My invention consists of a coupling or joint for uniting rods, shafting or tubes of
round or other section in a speedy and secure manner or for uniting rods to tubes and
for making joints that are required to be telescopic or collapsing. It may be used for
a great variety of purposes and amongst others as a coupling for shafting of equal or
diminishing diameters for connecting and permanently uniting piston rods-rods of
engines and machinery-shafting of machinery-axle rods-shafting of screw
propellors used in steam boats-bicycle and tricycle rods or tubes and for making
collapsing joints on same.
The coupling or joint consists Firstly of a jamming ferrule made tapering externally
with its interior bore of the same diameter and shape as the rod or tube it is desired to
unite-Secondly of a cap or nut screwed internally by preference at its base end and
its outer or other end bored tapering internally to fit the external taper of the jamming
ferrule Thirdly of a collar or nipple bored internally of the same diameter as the
tube, shaft, or rod it is desired to connect and screwed externally to fit the base end
of the cap or nut.
In the case of connecting any description of shafting or tube the cap or nut is first
passed over the ends of each length of shafting or tube, then the jamining ferrule is
passed on to the end of each piece of shafting or tube with its taper end towards the
cap or nut and lastly the collar or nipple is passed on to the extreme ends of the
shafting which should be brought together as near the centre of the collar or nipple as
practicable the jamming ferrules are then slid down the shafting or tube until the ends
are in contact with the collar or nipple-the caps or nuts are then brought down over
the jamming ferrule and screwed firmly on to the collar or nipple the screw threads of
which in the case of shafting which is required to revolve are reversed at each end and
known by the term of left and right handed screw threads. It will be seen that in
the coupling or uniting the two ends of shafting are firmly and securely held together
DS71

page_text: by the screwed ends of the caps or nuts engaging on to the screwed thread of the
collar or nipple at the same time the outer or tapering ends of the caps or nuts press
the jamming ferrules round the shafting by the internal taper of the same. It will
also be understood that solid rods or shafting or tubes either of equal or diminished
diameters may be united in the manner before described.
In making a telescopic or collapsing joint or connection two tubes, or a rod and
tube, the one of smaller outside diameter than the inside diameter of the other, are first
provided the extreme end of the larger tube is screwed or threaded and a cap or nut
provided with its base end threaded internally to fit on to the screwed end of the larger
tube, the jamming ferrule is bored to fit the smaller rod or tube. The cap or nut is
first passed on to the smaller rod or tube then the jamming ferrule is passed on to it
with its taper end towards the cap or nut and when the desired length of adjustment
has been made by sliding the rod or tube of smaller diameter within the tube of
larger diameter the jamming ferrule is brought down in contact with end of larger
tube and the cap or nut passed down towards end of larger tube and screwed and
engaged on to its screwed end-the jamming action before described then unites
the smaller tube or rod to the tube of larger diameter at the desired length of
adjustment.
Rods or tubes may be thus united at right or obtuse angles or as tee branches or
crosses or otherwise.

page_text: or Tubes of any Description.
I THOMAS HUNGATE PRESTON DENNIS Engineer and Ironmonger Chelinsford
Essex, 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:-
My invention consists of a coupling or joint for connecting rods shafting or tubes of
round or other section in a speedy and secure manner or for uniting rods to tubes and
for making joints that are required to be telescopic or collapsible. It may be used for
a great variety of purposes and amongst others as a coupling for shafting of equal or
diminishing diameters for connecting and permanently uniting piston rods rods of
engines and machines shafting of machinery axle rods shafting of screw propellors
used in steam boats bicycle and tricycle rods or tubes and for making collapsing joints
on same.
The coupling or joint consists firstly-of a jamming ferrule made tapering externally
with its interior bore of the same diameter and shape as the rod or tube it is required
to unite secondly-of a cap or nut screwed internally by preference at its base end
and its outer or other end bored tapering internally to fit the external taper of the
jamming ferrule-thirdly of a collar or nipple-bored internally of the same diameter
as the tube shaft or rod it is required to connect and screwed externally to fit the base
end of the cap or nut.
In the case of connecting any description of shafting rod or tube the cap or nut is
first passed over the ends of each length of shafting rod or tube with its base or
screwed end towards the end of shafting rod or tube then the jamming ferrule is
passed on to the end of each piece of shafting rod or tube with its taper end towards
the cap or nut and lastly the collar or nipple is passed on to the extreine ends of the
shafting which should be brought together as near the centre of the collar or nipple as
practicable or I sometimes construct the collar or nipple with a solid centre or pin
up to which the ends of shafting may be brought-the jamming ferrules are then slid
down the shafting, rods or tubes--until the ends are in contact with the collar or
nipple-the caps or nuts are then brought down over the jamming ferrules and
screwed firmly on to the collar or nipple.
In the case of shafting which is required to revolve or for other purposes I use running
or lock nuts on the collar or nipple which are turned tightly back up to the base ends
of the cap or nuts to prevent them from unscrewing. I sometimes use right and left
handed screw threads on the collar or nipple and screw the threads of the caps or nuts
to correspond.
It will be seen then in the coupling or uniting of the two ends of the shafting rods
or tubes they are firmly and securely held together by the screwed ends of the caps or
nuts engaging in to the screwed threads of the collar or nipple at the same time the
outer or tapering ends of the caps or nuts press the jamming ferrules round the
shafting rod or tube by the internal taper of the same. It will also be understood that
solid rods or shafting or tubes either of equal or diminished diameter may be united in
the manner before described.

page_text: In making a telescopic or collapsing joint or connection two tubes or a rod and tul
the one of smaller outside diameter than the inside diameter of the other are fir
provided the extreme end of the larger tube is screwed or threaded and a cap or n
provided with its base end threaded internally to fit on to the screwed end of th
larger tube the jamming ferrule is bored to fit the smaller rod or tube the cap or m
is first passed on to the smaller rod or tube in the manner before described then th
jamming ferrule is passed on to it with its taper end towards the cap or nut and whe
the desired adjustment has been made by sliding the rod or tube of smaller diamete
within the tube of larger diameter the jamming ferrule is brought down in conta
with end of large tube and the cap or nut passed down towards end of larger tube an
screwed and engaged on to its screwed end the jamming action before described the
unites the smaller tube or rod to the tube of larger diameter at the desired length
adjustment.
Rods or tubes may be then united at right or obtuse angles or as tee branches
crosses or otherwise. I wish it to be understood that I do not confine myself to th
precise details herein given neither do I claim the jamming ferrule as new as I a
aware they have been used for various purposes:
DESCRIPTION OF DRAWINGS.
Fig. 1 represents the elevation of shafting rod or tube in position as connected:
DD is the shafting rod or tube.
B B are the caps or nuts.
EE are the running or lock nuts.
C is the collar or nipple.
Fig. 2 is a transverse section of Fig. 1.
A A are the jamming ferrules.
B B, C, D D and EE are the corresponding parts described in Fig. 1.
Fig. 3 is an elevation of the jamming ferrule A.
Fig. 4 is an end view of its small or tapered end.
Fig. 5 is an end view of its larger end.
Fig. 6 is an elevation of a telescopic or collapsing joint.
Fis the larger tube before described.
D is the smaller rod or tube which passes within it.
B is the cap or nut.
Fig. 7 is a transverse section of Fig. 6.
Fis the larger tube.
D is the smaller rod or tube.
B is the cap or nut.
A is the jamming ferrule.
The letters throughout the drawings refer to the same parts.
Having now particularly described and ascertained the nature of my s
Invention and in what manner the same is to be performed I declare that w
I claim is :-
The use of the jamming ferrule in connection with the other parts of my invent
for the purposes herein before set forth and illustrated by the drawings.
TT D DENNIS