Improvements in and relating to Couplings, more especially applicable for Boring Rods.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to Couplings, more especially applicable
for Boring Rods.
I, FRANK BAKER, of 1, Leadenhall Street, London, E.C., Consulting Engineer,
do hereby declare the nature of this invention to be as follows:-
This invention relates to couplings and more especially to couplings for the
connection of sections of boring rods or tubes, and has for its object to provide
a coupling of simple design which may be readily and easily fastened and un-
fastened.
In the coupling of sections of boring rods or tubes according to present practice
the sections become so firmly jambed by reason of the torsional stress imposed
on the rotation of the rods or tubes in drilling that the uncoupling is effected
with very great difficulty and usually necessitates the employment of special
tackle. It is the object of the present invention to obviate this disadvantage
and so provide a coupling that its disconnection may be easily and readily effected.
The invention consists in providing a coupling as male and female parts respec-
tively secured to the extremities of the sections of rod or tube to be connected,
the respective internal and external peripheries of the parts being provided with
spiral or angular threads or ribs by means of which one part is permitted to be
inserted within the other so as to be firmly embraced thereby. A slot or slots is
or are formed upon the interior of the one part in a direction reverse or angular
to that of the internal threads or ribs, such slot. when the two parts of the coupling
are connected, coinciding with a similarly shaped slot provided upon the external
periphery of the other part forming the coupling, the coincident slots thereby
forming a channel or key-way into which a key may be introduced, the key
engaging with the abutting ends of the respective threads or ribs and preventing
rotation in one direction and the other, so that it is neither possible to jamb
the one part of the coupling into the other nor to effect this disconnection except
when the key is withdrawn.
In carrying the invention into effect in its application for the coupling of
sections of boring tube, I provide upon one extremity of the sections of tube
a female coupling piece which is screwed or otherwise fixedly secured thereto and
I provide this coupling piece with internal spiral threads or ribs of relatively
great pitch and of a size properly determined for transmitting the torsional stress
that has to be imposed on the tubes in working. I preferably provide such a coup-
ling piece with an internal flange suitably faced, against which the extremity
of the connected tube closely abuts and the peripheral face of this flange may be
machined to receive the extremity of the male tubular coupling piece so as to
form a water tight joint. The male coupling piece has provided upon its periphery
threads or ribs corresponding to those provided in the female part and of such a
size as to be conveniently received within the recesses between such threads or
ribs on the complementary female part, so that when the male part of the coupling
is screwed into the other a rigid fastening is effected. Upon the male coupling
ГР.: 011

page_text: immediately above the threads a flange may be provided having a machined face
which face may be parallel or of conical or tapered from corresponding to the
mouth of the female part, so that by such means the one part becomes slightly
bound within the other on the operation of the rods or tubes thereby forming a
further water tight joint. The disconnection may be effected by merely tapping
one part or providing a pin upon the male part which may be lightly hammered so
as to release the one part from the other prior to being separated by unscrewing.
Upon the interior of the female part of the coupling a slot or slots is or are provided
in a direction reverse or angular to the threads or ribs in such a manner as to
cut away such threads or ribs, and a similarly shaped slot or slots is or are
provided upon the exterior of the male part in such position thereupon that when
the one is screwed or introduced within the other the slots shall coincide and
form a key-way within which a key or keys of a corresponding shape to the channel
or key-way may be introduced, so that one part of the joint is fixedly secured to
the other and is prevented from relative rotation in one direction or the other
seeing that the torsional stress is conveyed transversely through the key or keys.
The jambing of the threads or ribs while the boring rods or tubes are in operation,
is thereby prevented.
The key or keys may be provided so as to be dropped in a slot provided in the
flange situate above the threads or ribs of the male part and the key or keys may
be provided with means for convenient extraction and means if desired for posi-
tively retaining the key in its engaged position, or a pin may be provided upon the
key which may pass within a slot in the exterior of the female part, the slot
being of a shape corresponding to that of the key-way. Further I may so form
the upper part of the male coupling piece as to provide a neck immediately below
the its upper extremity convenient for the reception of the keys on being withdrawn
from the key-ways.
In practice for example in the employment of tubular rods of 3 inches in
diameter I may provide one coupling piece to be engaged in the other on one half
turn, the pitch being relatively-great-such as and the length of the threads being
from four to five inches.
It is obvious that I do not limit my invention to any particular number of
threads or ribs of either of the parts or pieces forming the coupling, nor to the
means described for effecting water tight joints, nor yet to the particular means
. of introducing the key, nor to the shape of the transverse slots or key-ways, nor
to their number, nor yet to the shape of the respective pieces or parts constituting
the coupling.
Dated this 21st day of Woh 1000
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street, Manchester, Agents.
Improvements in and relating to Couplings, more especially applicable
for Boring Rods.
I, FRANK BAKER, of 1, Leadenhall Street, London, E.C., Consulting 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 follow-
ing statement:-
This invention relates to couplings and more especially to couplings for the

page_text: connection of sections of boring rods or tubes, and has for its object to provide
a coupling of simple design which may be readily and easily fastened and un-
fastened.
In the coupling of sections of boring rods or tubes according to present practice
the sections become so firmly jambed by reason of the torsional stress imposed
on the rotation of the rods or tubes in drilling that the uncoupling is effected
with very great difficulty and usually necessitates the employment of special
tackle. It is the object of the present invention to obviate this disadvantage
and so provide a coupling that its disconnection may be easily and readily effected.
The invention consists in providing a coupling as male and female parts respec-
tively secured to the extremities of the sections of rod or tube to be connected,
the respective internal and external peripheries of the parts being provided with
spiral or angular threads or ribs by means of which one part is permitted to be
inserted within the outer so as to be firmly embraced thereby. A slot or slots is
or are formed upon the interior of the one part in a direction reverse or angular
to that of the internal threads or ribs, such slots when the two parts of the coupling
are connected, coinciding with a similarly shaped slot provided upon the external
periphery of the other part forming the coupling, the coincident slots thereby
forming a channel or key-way into which a key may be introduced, the key
engaging with the abutting ends of the respective threads or ribs and preventing
rotation in one direction and the other, so that it is neither possible to jamb
the one part of the coupling into the other nor to effect disconnection except
when the key is withdrawn."
In the accompanying drawings which. illustrate my invention
Figure 1 shows partly in section one form of my coupling in which several spiral
threads are used and a spiral key placed at an angle thereto.
Figures 2 and 3 illustrate in part section and plan a modified form of coupling
in which the key is placed at such an angle to the spiral threads as to be parallel
to the axis of the boring bar.
Figure 2 is a diagrammatic view showing the development of the outer locking
surface of my improved joint, the key being inserted in one position but omitted
in the other.
Figure 4 is a modification of Figure 2 in which the key is curved.
In carrying the invention into effect in its application for the coupling of
sections of boring tube. I provide upon one extremity a of the sections of tube, a
female coupling piece which is screwed or otherwise fixedly secured thereto
and I provide this coupling piece with internal spiral threads or ribs c of relatively
great pitch and of a size properly determined for transmitting the torsional stress
that has to be imposed on the tubes in working. I preferably provide such a
coupling piece with an internal flange d suitably faced, against which the extremity
of the connected tube closely abuts and the peripheral face of this flange may be
machined to receive the extremity of the male tubular coupling piece c so as to
form a water tight joint. The male coupling piece e has provided upon its peri-
phery threads or ribs f corresponding to those provided in the female part and of
such a size as to be conveniently received within the recess between such threads
or ribs on the complementary female part, so that when the male part of the
coupling is screwed into the other a rigid fastening is effected. Upon the male
coupling immediately above the threads a flange ? (Figure 2) may be provided
having a machined face which face may be parallel or of conical or tapered form
corresponding to the mouth of the female part, so that by such means the one
part becomes slightly bound within the other on the operation of the rods or
tubes thereby forming a further water tight joint. The disconnection may
be effected by merely tapping one part or providing a pin or key upon the male
part which may be lightly hammered so as to release the one part from the other
prior to being separated by unscrewing or turning. Upon the interior of the
female part of the coupling a slot or slots is or are provided in a direction reverse
or angular to the threads or ribs c in such a manner as to cut away such threads

page_text: or ribs, and a similarly shaped slot or slots his or are provided upon the exterior
of the male part in such position thereupon that when the one is screwed or intro-
duced within the other the slots shall coincide and form a key-way within which
a key or keys shown in dotted lines in Figure 1, of a corresponding shape to
the channel or key-way may be introduced, so that one part of the joint is fixedly
secured to the other and is prevented from relative rotation in one direction or the
other seeing that the torsional stress is conveyed transversely through the key or
keys. The jambing of the threads or ribs while the boring rods or tubes are in
operation is thereby prevented.
The key or keys may be provided as in Figures 2, 3 and 4 so as to be dropped
in a slot m provided in the flange g situated above the threads or ribs n of the
male part and the key or keys may be provided with means for convenient extrac-
tion and means if desired for positively retaining the key in its engaged position,
or a pin may be provided upon the key which may pass within a slot in the exterior
of the female part, the slot being of a shape corresponding to that of the key-way.
Further I may so form the upper part of the male coupling piece as to provide a
neck o immediately below its upper extremity convenient for the reception of
the keys i, l, on being withdrawn from the key ways.
In practice for example in the employment of tubular boring rods of 3 inches
in diameter I may provide one coupling piece to be engaged in the other on one.
half turn, the pitch being relatively great such as the length of the threads being
from four to five inches, as in Figure 1.
Figure 4 is a modification of Figures 2 and 3 in which the neck is avoided by
forming the key to a large radius and fitting it into a slot or key-way of similar
radius so that on being withdrawn the key follows a circular path and comes away
clear of the male part e of the coupling. The key may be secured by a spring or
rubber catch as p or by a set pin or its equivalent. The water-tightness of the
joint may be further insured by rubber rings or other packing as q.
It is obvious that I do not limit my invention to any particular_number of
threads or ribs of either of the parts or pieces forming the coupling, nor to the
means described for effecting water-tight joints, nor yet to the particular means
of introducing the key, nor to the shape of the transverse slots or keyways, nor to
their number, nor yet to the shape of the respective pieces or parts constituting
the coupling.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
1. The improved coupling for use particularly upon boring rods having one
member or joint end provided with a spiral or angular thread or rib to engage
with a similarly formed companion spiral thread or rib in the other part or end,
and having a key or keys placed at an angle to the thread or rib and fitting in
grooves formed within the two joining or coupled parts, substantially as herein-
before described and as illustrated in the accompanying drawings.
2. In a coupling constructed as described in Claim 1 the use of a neck upon one
of the jointing parts to admit of the key or keys being withdrawn substantially
as herein before described and as illustrated in the accompanying drawings.
3. In a coupling as described the construction and arrangement of closely abut-
ting edges for effecting
described and as illustrated in the accompanying drawings.
a water-tight surface joint, substantially as hereinbefore
Dated CHIS 20th
Doaamhar 1800
CHis 20th
Dacamhar 1800
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street, Manchester, Agents