An Improvement in Tubular Posts for Telegraphic and other Purposes.
Year: 1888

page_text: Date of Application, 21st Dec., 1888
Complete Specification Left, 2nd Aug., 1889-Accepted, 7th Sept. 1889
PROVISIONAL SPECIFICATION.
An Improvement in Tubular Posts for Telegraphic and other
Purposes.
I, CARL ERNST JULIUS MAY of Maryon Road Charlton in the County of Kent,
Engineer, do hereby declare the nature of this invention to be as follows:-
'
Many posts for telegraphic and other purposes are made tubular, in lengths jointed
together. My invention relates to an easy and sound method of securing such joints.
In some cases these have been secured by inserting the end of one length into a
tapered socket at the end of another length, and driving in a split or divided wedge
ring which being contracted by the taper of the socket firmly held the length which
is embraced. Such wedge rings are liable to be driven unequally, and cannot
easily be dislodged in cases where the lengths have to be separated. Now, accord-
ing to my invention, I make the taper socket with an internal screw thread and
the split taper wedge ring with a corresponding external screw thread. When the
one length is inserted into the socket of the other length, I by means of a suitable
wrench or spanner screw down the wedge ring which, owing to the taper, is made to
embrace firinly the tube which it surrounds.
According to a modified arrangement, I form the socket with several, preferably
three internal protuberances, and I make the split ring with a corresponding number
of external protuberances, both sets of protuberances having cam shaped rounded or
sloping faces. I introduce the ring, the protuberances of which pass between those
of the socket, and then by turning the ring partly round I cause it to clamp the tube
which it embraces.
Doted this 91st day of December 1888
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improvement in Tubular Posts for Telegraphic and other
Purposes.
I, CARL ERNST JULIUS MAY, of Maryon Road, Charlton in the County of Kent,
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 :-
Many posts for telegraphic and other purposes are made tubular in lengths jointed
together.
My invention relates to an easy and sound method of securing such joints. In some
cases these have been secured by inserting the end of one length into a tapered socket
at the end of another length and driving in a split or divided wedge ring which being
contracted by the taper of the socket firmly held the length which is embraced.
Such wedge rings are liable to be driven unequally and cannot easily be dislodged
in cases where the lengths have to be separated.
Now according to my invention, I make the taper socket with an internal screw
thread and the split taper wedge ring with a corresponding external screw thread.
When the one length is inserted into the socket of the other length, I by means
of a suitable wrench or spanner screw down the wedge ring which, owing to the
taper, is made to embrace firmly the tube which it surrounds.
According to a modified arrangement, I form the socket with several, preferably
three, internal protuberances and I make the split ring with a corresponding number
of external protuberances, both sets of protuberances having cam shaped rounded or

page_text: sloping faces. I introduce the ring, the protuberances of which pass between those
of the socket, and then by turning the ring partly round I cause it to clamp the tube
which it embraces.
Fig. 1 of the accompanying drawings is a vertical section and Fig. 2 is an elevation
of part of a tubular post shewing a jointing according to this invention. Fig. 3 is a
sectional plan. The upper length A is let into the socket of the under length B and
secured in position by a ring (which is tapered and has an external screw thread
nearly fitting an internal screw thread formed in the mouth of the socket.
The ring is split at one side and has notches in its upper edge to receive a
spanner by which it can be screwed in.
Owing to its taper form, as it is screwed into the socket, the ring C is made to grasp
firmly the upper length A and hold it securely in the socket of the lower length B.
According to the modified construction shewn by the vertical section Fig. 4, the
elevation Fig. 5 and the sectional plan Fig. 6, part of which is shewn to an enlarged
scale by Fig. 7, instead of employing a screw threaded ring and socket as above
described, I employ a ring E with external sloping or cam shaped protuberances e and
a socket D with corresponding internal protuberances d. The ring which is split at
one side, can be freely introduced into the socket in the position where the pro-
tuberances of the one set face the interval between those of the other as shown in
Fig. 7; then, on turning the ring partly round by means of a spanner, the pro-
tuberances have a wedging action tending to close the ring and make it firmly grasp
the upper length A.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what
I claim is
1. For jointing together lengths of tubular posts, in combination with a screw
threaded socket at the end of the one length, a screw threaded taper split ring
embracing the end of the other length inserted in the socket, substantially as described
with reference to Figs. 1, 2 and 3.
2. The modified jointing wherein the split ring has sloping external protuberances
and the socket has corresponding internal protuberances, substantially as described
with reference to Figs. 4, 5, 6 and 7.
Dated this 2nd day of August 1889.
ABEL & IMRAY,
Agents for the Applicant.