Year: 1887

page_text: Date of Application, 19th July, 1887
Complete Left, 11th Apr., 1888
Complete Accepted, 11th May, 1888
I JOSEPH HELME Bobbin Manufacturer Glen Mill Troqueer Kirkcudbrightshire
do hereby declare the nature of this invention to be as follows:-
My invention is for the purpose of producing wooden bungs or shives at one
operation instead of by two or more operations or processes as has been the usual
practise hitherto.
The timber is prepared in long pieces of suitable section in the ordinary way and
being guided by suitable stops is passed into the machine. An ordinary following
headstock or slide with bar or spindle carrying an ordinary claver or clip and advanced
by a lever presses the timber into contact with a rapidly revolving chuck which with
its fittings performs the operations of sawing or "blocking out" the bung, tapering
it to a true circle and champfering or arridging the inner edge. This chuck with its
fittings constitutes the principal part of my invention. The operations named are
performed at one instroke of the spindle of the following headstock.
The said chuck is of bell or cup form and carries attached to it and projecting
beyond its edge a saw or saws bent to the true circle and having teeth formed on
their outer circular edges.
The inner edge of the chuck is bell-mouthed to a fine edge and at one or more
points in the inner circumference of the chuck there are fixed suitable cutters pro-
jecting slightly into the interior and at an angle to give the required taper to the
bung. At a proper distance within the chuck are fixed one or more projecting
suitable cutters for giving the desired bevil or arridge to the inner edgo of the bung.
I do not confine myself to any exact number or method of fastening these cutters.
The chuck is screwed or otherwise suitably attached to a hollow spindle carried in a
fixed head stock, and within the spindle is a shaft or bar free to slide end ways but
prevented from revolving by a suitable external feather or by any ordinary arrange-
ment for the purpose. This bar carries an ordinary claver or set of teeth on its end
Гр

page_text: within the chuck. It is caused to press forward by a suitable arrangement of spring
or weight and thus holds or grips the timber being operated upon between itself and
the claver on the before mentioned spindle of the following headstock which when
moved forward by the lever as before described overcomes the resistance of the said
spring or weight and thus the timber is advanced into the rapidly revolving chuck and
the bung is sawn out tapered and arridged. Upon the spindle of following head-
stock again being caused to recede the internal bar of the fixed headstock being
pressed forward by the weight or spring throws out the finished bung and the timber
can be immediately advanced for another to be formed.
The sliding motion of the internal bar is suitably limited.

page_text: 1, JOSEPH HELME of Glen Mill Troqueer Kirkcudbrightshire, Bobbin Manufacturer'
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 invention is for the purpose of producing wooden Bungs or Shives at one
operation instead of by two or more operations or processes as has been the usual
practise hitherto.
In the accompanying Drawings Fig. I is an elevation and Fig. II is a plan of the
complete machine. Fig. III is a longitudinal section Fig. IV an external plan and
Fig. Va front view partly in cross section of the combination Chuck.
T-See Figs. I and II represents the timber which is prepared in lengths of suitable
section in the ordinary way and it is passed into the machine by hand being guided by
guide g which also carries a suitable stop to limit the travel of the timber. c' and c
are the clavers or faces carrying teeth and are carried on the ends of sliding bars b¹
and b which are prevented from rotating by keys or other suitable means. H is the
fixed beadstock carrying the hollow spindle S and the combination Chuck C. The
claver bar b slides longitudinally being carried by the bracket s¹ and by the interior
of chuck C. Its stroke is suitably limited by the collar t. H' is the following
headstock carrying the claver bar b. is a hand lever working on centre a and by
which the bar b is advanced and retired. d is a vertical lever working on centre e
and pivotted at f. to the bar b². To its upper end is attached a rod and spring i. This
rod and spring may be attached at the other end either to a fixed bracket k shewn
dotted or preferably to a pillar / which is carried by the bar b.
In Figs. III. IV. and V. C is the body of the Chuck which is screwed or otherwise
suitably attached to the hollow spindle S. At its mouth it is tapered inwardly almost
to a fine edge and the ears m are cast with it. Adjacent to these ears the slots n are
formed in the Chuck and into these slots and lying upon the face of the ears are
inserted the knives or cutters o, secured by screws p. The inner cutting edges project
slightly inside the tapered mouth of the chuck and are of the form shown in Fig. III.
in which case the same cutters perform the operations of tapering and arridging. In
some cases I make these cutters without the lip q and insert separate cutters to perform
the operation of arridging. The first operation of sawing or blocking-out is performed
by the short saw blades which are bent to the periphery of the Chuck and secured
thereto by screws 8.
The dotted section T in Figs. III and IV represent the timber with a partially
formed Bung in process of operation.

page_text: The action is as follows :-
The timber T being advanced into position the Claver c is moved forward by handle h
until the timber is firmly gripped between the two clavers owing to the tension of
spring. Upon the handle h being further advanced the timber is brought into
contact with the rapidly revolving saws being thereby "blocked out" or a circular
piece is cut.
Before or so soon as this operation is completed the said circular piece
being still gripped by the clavers and advanced comes into contact with the cutters o
and by them is tapered and arridged. When complete the handle his retired and
the finished Bung is impelled outwards by the claver c¹ owing to the tension of the
spring i.
The Bung then falls clear and the machine is ready to commence operations on
another Bung.
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 :-
I. Producing wooden Bungs or Shives at one operation.
II. The combination hollow Chuck C having attached to it the saws and also a
knife or knives o so arranged as to perform simultaneously the operations of sawing
or blocking out and of tapering and arridging the Bungs substantially as hereinbefore
described.
III. The two sliding non-rotating Clavers whereby the timber is firmly gripped and
advanced into the Chuck, the said Clavers retaining their hold after severance of the
Bung from the timber and releasing and throwing out the finished Bung substantially
as hereinbefore described.
IV. Connecting the two Claver bars by a spring so that their grip of the timber is
self-contained in the machine, the operator only having to overcome the resistance of
the saws and cutters, substantially as hereinbefore described.