IMPROVED DOUBLE LOCK
Year: 1883

page_text: LETTERS PATENT to Robert Watkinson of Salford in the County of Lancaster
Brass Founder for an Invention of IMPROVED DOUBLE LOCK UNIVERSAL
LETTERS PATENT to Robert Watkinson of Salford in the County of Lancaster
Brass Founder for an Invention of IMPROVED DOUBLE LOCK UNIVERSAL
JOINT FOR COUPLING PIPES AND OTHER PURPOSES
PROVISIONAL SPECIFICATION left by the said Robert Watkinson at the
Office of the Commissioners of Patents on the 15th January 1883.
ROBERT WATKINSON of Salford in the County of Lancaster Brass Founder
"IMPROVED DOUBLE LOCK UNIVERSAL JOINT FOR COUPLING PIPES AND OTHER
PURPOSES
On the first day of May 1876 I applied for an obtained Letters patent for
"An Improved Universal Joint for coupling pipes and Stoppering Bottles."
Numbered 1823
My present invention is for an improvement on that invention, The joint is
made in a similar way and by similar means-the ends of the pipes or objects being
drawn together by fastenings formed partly by segmental ribs at the end of one
pipe and by segunental recesses in the union coupling piece loose on the end of the
other pipe or the segmental recess may be made in the end of the pipe itself,
=
The segmental ribs are made in the front, wedge shape pressing against the
projections drawing up the two objects for joint, between which is India Rubber or
other clastic material behind the wedge end of the Segmental rib is a first lock
shoulder which slips over the first projection making the first lock it is twisted
further round until it comes in contact with another projection provided on or near
the centre of the segmental ribs such projection again comes in contact with a
recess cut in the projections entering therein forms double lock to the joint, I
may use one two or more locks similarly applied, To unlock this joint it is
necessary to press firmly together the two pipe or other joint ends turning them at
the same time when the joint is liberated and set free but so long as the joint
remains' untwisted it will never be broken or unmade.
I likewise make an additional recess above and joining the one used in
my before
named patent into which the centre rim of the joint Washer is forced by the inside
pressure thereby, making a joint under any ammount of pressure impossible to break
or pass
likewise make a small flange projection on the lower side of the annular recess
or groove to keep the elastic washer in its propper place

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the sail Robert Watkinson in the Great Seat Patent Office on the
5th July 1883.
ROBERT WATKINSON of Salford in the County of Lancaster Brass Founder
"IMPROVED DOUBLE LOCK UNIVERSAL JOINT FOR COUPLING PIPES AND OTHER
PURPOSES "
"
On the first day of May 1876 I applied for and obtained Letters patent for
an "Improved Universal joint for coupling pipes and for Stoppering Bottles
Numbered 1823.
My present invention is for "Improvements on that invention as regards the
coupling of pipes,
The joint is made in a similar way and brought up by similar means = but when
the joint is drawn firmly up it is there fastened instantly by a double snapp Lock
when no sort of knocking about or crushing during the confusion of a fire, it cannot
posibly unlock itself nor become unlocked but by human aid,
The ends of the pipes or joints are drawn together by fastenings formed partly
by segmental ribs at the end of one pipe or part to be joined and by segmental
recesses in the other or rather a union coupling piece loose on the end of the other
pipe end or part to be joined, Or the segmental recess may be made in the end of
the pipe itself,
=
The segmental ribs are made in a similar way to those on my before mentioned
patent in their wedge shaped draft on each other there is likewise india rubber or
other suitable elastic ring washer between the two ends of the joint, the same in
substance but diferent in shape to the before named patent,
Behind the wedge end of the segmental rib is a first lock shoulder which slips
over the first projection, making the first lock, it is then twisted further round until
it comes in contact with another projection provided on or near the centre of the
segmental ribs such projection again comes in contact with a recess cut in the
projection and entering therein forms a double lock to the joint-I may use one
two or more locks similarly applied,
To unlock this joint it is necessary to press firmly together the two joint ends at
the same time turning them when the joint is liberated,
I likewise make an additional recess above and joining the one used in my before
mentioned patent into which the centre rim of the joint washer is forced by the
inside pressure thereby making a joint impossible to break or pass, I likewise
make a small flange projection on the lower side of the annular recess or groove to
keep the elastic washer in its proper place,
I annex hereunto a sheet of drawings the several figures on which are marked
by corresponding letters of reference,
Fig. 1. is a section through a coupling for hose pipes-which is very like the
section in my before named patent,
Fig. 2. is a side view of one part of the joint of the before named patent,
Fig. 3. is a plan of another part of the same joint. These two last figures
are shown to illustrate the difference between these parts of the old and new
patents.
Fig. 4. is a side view of one part of the joint showing the double lock
arrangement with catches. B. and. A.,
Fig. 5. is a plan of the swivel locking box ring, a. a. are the handles or thumb
nins by which it is locked the catches. A. Fig. 4. entering the notches. A

page_text: Fig. 6. is a plan of a swivel locking box ring of a larger size where a Treble
lock may be used,
.a. a. in Fig. 1. is the swivel locking box ring by which the two joint ends are
drawn together, b. b are the two metal joint ends,. c. c the india rubber or other
elastic ring,. d. d. is the cam ring over which the swivel locking box slides round,
a. a. works partly round for drawing the two joint ends together, e.-e. is a flange
projecting, yet fiting or shouldering into the lower part of the swivel locking
box a. a.,
pipes"
.g.g. are swivels used in my before named patent, h. i. and. j. represent portions
of a patent granted to me on the 23rd day of March 1878-Numbered 1163
Titled "
'Improved Screw ferule joint for connecting hose or other such like
Figures. 2. and. 3. as I have before stated represent portions of my first named
patent and are here shown merely to illustrate the difference between what I have
now and what formed a part of my first invention,.
Fig. 4. show the first and second or double lock arrangement. B. and. A. being
being the two catches,
Fig. 5. is a plan of the same, A' being a notch to receive the catch. A. and. B.
Fig. 4. enters groove. B' Fig 5 and forms the second or double lock, but this in my
before named patent of May the first 1876 formed the first and only lock,
Fig. 6. as before stated is merely to show how I make a Treble lock only required
for large joints,
To make these joints the india rubber. c. c. or other elastic washer is placed in
the annular recess provided to receive it shown in the lower end of the upper
portion of joint. b. Fig. 1. The swivel locking box ring is then passed over lower
joint end b up to flange or collar. e. the two ends. n. and. m. are now brought
together the. n. end of lower half b¹ fiting into. m. end of. b The swivel locking
box is now forcibly turned partly round the slotted portion, such box sliding up the
cam ring. o. Fig. 4. until the projections. B. and. A. come fair with the slotts. A' and.
B' when the double lock is made.
To unlock them the two joint ends. b. and. b' are pressed together at the same
time the swivel locking box. a. a is turned in a contrary way to that for locking
when the two are instantaineously disconnected. Having fully described my
invention and the way it is made and used I do not confine myself to the precise
form or detail I have had occasion to describe but what I claim as secured to me
herein is,
First for the cam ring. o. locking projections. B. and A. on Fig 4. substantialy
as and for the purposes herein before described and refered to,
Second the Vended spigot. n. and small annular recess to enable me to press in
the centre of elastic washer on Fig. 1. substantialy as and for the purposes herein-
before described and refered to.
Third and last an Improved double lock universal joint for coupling pipes
and other purposes. Substantialy as and for the purposes hereinbefore described
and refered to
'
In Witness whereof I. Robert Watkinson have hereunto set my hand
and seal this Second day of July in the year of our Lord one thousand
eight hundred and eighty three
ROBERT (L.s.) WATKINSON