Improvements in Joints for Coupling together Lengths of Glass Tubing used in Drawing off Beer.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Joints for Coupling together Lengths of Glass
Tubing used in Drawing off Beer.
I, GEORGE EDWIN HOEY, of Royal Street, Barnsley, in the County of York,
Accountant, do hereby declare the nature of this invention to be as follows:-
My present invention relates to joints for coupling together lengths of glass
tubing used in the drawing off of beer, the object being to construct and arrange a
cheap and efficient joint which will enable the lengths of glass tubing to be
expeditiously coupled together and to form a perfect hermetically sealed joint and
one that will withstand a large amount of fluid pressure; to attain which I employ
a cylinder which has a thread formed on its outside circumference near each end
thereof and each end of said cylinder is formed with an annular bevelled or tapered
part for the reception of a washer of leather or other similar pliable material.
At the back of each said washer I place a ring of india rubber or other elastic
substance.
Each end of cylinder receives a screw cap the inner circumference of which has
a screw thread corresponding with the screw thread on the cylinder and its outer
circumference is milled or otherwise roughened so that it can be firmly gripped by
the hand.
The outer end of each said cap has an annular flange for the purpose of bearing
against the ring of india rubber.
In forming my said improved joint by the aid of the parts described I place a
washer and ring on each separate part of glass tubing and after the ends of said
tubing have been filed or ground so as to be capable of firmly meeting together they
are brought together within the cylinder and the caps which have been previously
placed on the tubing are then screwed up, by which means the lateral pressure on
the washers and rings is by the aid of the annular tapered or bevelled parts of the
cylinder transformed into a centripetal pressure and so hermetically seals the
circumferences of each part of glass tubing within the joint which latter is then
capable of withstanding a large amount of internal pressure as will be well under-
stood..
D
1
20
1 1
0
1
100%

page_text: Improvements in Joints for Coupling together Lengths of Glass
Tubing used in Drawing off Beer.
I, GEORGE EDWIN HOEY, of Royal Street, Barnsley, in the County of York,
Accountant, 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:-
My present invention relates to improvements in joints for coupling together
lengths of glass tubing used in drawing off beer, and the object of my improvements
is to so arrange a joint that lengths of plain glass tubing made without flanges may
be coupled together, and the said joints hermetically sealed and made to with-
stand a large amount of internal fluid and gaseous pressure.
By this means the advantages in cleanliness and purity in the use of glass tubing
in preference to the usual lead or metal piping hitherto employed for the drawing
off of beer and other beverages is made practical, and glass tubing can hereby be
generally used for the purposes stated in place of lead or other metal tubing,
whereas hitherto as no useful, adaptable or economical joint had been discovered
it was impossible without great cost to use glass tubing to advantage for the
purposes described.
I therefore attain this object by the arrangement of joint illustrated in the accom-
panying drawing in which:
Fig. 1 is a sectional elevation of a screw ended cylinder.
Fig. 2 is a sectional elevation of a screw-cap.
Fig. 3 is a sectional elevation of a flexible ring, and Fig. 4 a sectional elevation
of a leather washer.
Fig. 5 is a sectional elevation of my improved joint complete with glass tubing and
Fig. 6 is an end view of same, and Fig. 7 is a part sectional elevation of a modifica-
tion of my said improved joint.
Similar letters of reference denote corresponding parts throughout the several
views.
The cylinder A has a thread a¹ formed on each outside circumference near or at
each end thereof, and each inner end of cylinder A is formed with an annular
bevelled or tapered part a³ for the reception of a flexible ring B, and at the back
of each ring B I place a leather washer C for the purpose hereinafter described.
I employ two internally screwed caps D having their outer circumferences milled
so they may be firmly gripped by the fingers of the operator, and the outer end of
each said cap D is formed with an annular flange & for the purpose of bearing
against the leather washer C, and so the latter takes the friction off the flexible
ring B. In some cases however I dispense with the leather washers C and employ
thicker washers B only as shown at Fig. 7, in which case where preferred the part
or back of washer which bears against the flange & may have a cover of fabric.
One screw thread a¹ of the cylinder A is right handed and the thread a¹ at the
opposite end of said cylinder A is left handed, and the threads of the respective
caps D correspond therewith.
In forming my improved joint by the aid of the parts described I place a ring B
and then a washer C on each separate part of the glass tubing E and E¹ (see Fig. 5)
and after the ends of said tubing have been filed or ground so as to be capable of
firmly meeting together, they are brought together within the cylinder A, and the
caps D, which have been previously placed on the tubing E and E¹, are then screwed
up on the cylinder A, one with one hand and the other with the opposite hand of
the operator, by which means the lateral pressure on the washers C and rings B iş

page_text: by the aid of the annular tapered or bevelled parts a² of the cylinder A transformed
into a centripetal pressure and so hermetically seals the circumferences of each part
of glass tubing E and E within the joint, which joint is then capable of withstand-
ing a large amount of internal pressure, and a similar result is produced in the
joint shown at Fig. 7, where flexible rings B are used independently of washers C.
I am aware that prior to my invention screw caps have been used for pressing
washers up to flanges formed on the glass tubing, but the combined joint which I
claim has not hitherto been used in joining either flanged or plain glass tubing.
I am also aware that glands have been used as in the spindles of valves and on
piston rods of steam engines but my present invention has no reference to piston or
valve-rod glands and is only used for the purpose of attaining the object herein
before described, therefore,
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:
1. The combination in a joint for coupling together lengths of plain glass tubing
of a cylinder A having threaded ends at and internal annular bevelled or tapered
parts a² with screw caps 1 having annular flanges and rings B or rings B and
washers C all arranged substantially as set forth and for the purpose described.
2. The combination in a joint for coupling together lengths of unflanged or
plain glass tubing of a cylinder having a right handed thread at one end and a left
handed thread at the other, and annular internally tapered or bevelled ends, with
rings and washers or flexible rings only for bearing therein and caps for pressing
said rings and washers or rings only so as to transform a lateral pressure into a
centripetal pressure for the purpose of making an hermetically sealed joint substan-
tially as described.
Dated this 16th day of February 1898.
H. F. BOUGHTON,
Patent Agent, Barnsley.