Year: 1888

page_text: Date of Application, 12th June, 1888
Specification Accepted, 13th July, 1888
described and ascertained in and by the following statement
.
-
My invention relates to the structure of the metal bushings which are screwed into
he stave of the keg and into which bushings the wooden bung is driven to close the
barrel
At Figure 1, is shown an ordinary bushing in its place in the barrel stave the stave
being in section
Figure 2, the same parts are shown in section lettered with the same letters
Figure 3, shows a side view of one of my improved bushings
Figure 4, shows a cross section thereof
Figure 5, shows my improved bushing screwed into a stave, and
Figure 6, illustrates a case where the bushing has worked loose and has been
aightened a number of times, as will be described further on
Figure 5 shows the stave in section and Figure 6 shows the bushing in section also,
but both figures represent the same bushing under different conditions
In the drawings A is the old form of bushing now commonly used having the
flange a and the screw thread a¹ The stave of the keg is shown at B
It will be seen that the threads a' screw into the wood of the stave B and that the
lower part of the flange a rests flat upon the outside of the stave B
It will be evident that when this bushing is screwed home and the bottom of
the flange a is upon the stave, that the bushing cannot be further screwed down
The trouble with this old form of bushing is that it works loose and cannot be
haghtened The heating of the keg in "pitching" the barrel heats the bushing, which
then expands, and while expanding enlarges the hole in the stave, and in cooling con-
tracts, and finally from this and many other causes equally important, the bushing
works loose in the stave The general remedy is to take out the bushing enlarge the
hole in the stave if necessary and screw in a bushing of larger diameter or use the old
bushing and some packing This difficulty with the ordinary bushing is of constant
Docurance

page_text: My invention relates to a bushing equally simple and cheap which can be kept tight
in the stave for a much longer time
It consists of bushing of metal having the usual thread on the outside of the
cylindric il portion and the ordinary hole for the bung, but inste id of having a flange
with a horizont il fice where it meets the outside of the stave it is provided with a
flange formed it an angle of about 45 degrees or there shouts with the body This
angular face is provided with teeth like a insp or file which will cut into the wood of
the stavo as the bushing is turned
In all the figures A is the bushing, a¹ the screw threads on the body of the bushing
B is the barrel stave a is the flange of the bushing and c is the cutting face of the
flinge
I have not shown a top view of the bushing but it will be understood that they are
always circular it all parts
The cutting face c of my new bushing has teeth or cutting edges as shown at c¹,
Figures 3 and 5 These may be tecth as in a milling tool or teeth such as a rasp is
provided with They must cut when the bushing is turned in the direction in which
it is rotated when being screwed into the stave These teeth are preferably cut by an
appropriate cutter when the plun bushing is held upon mandrel The bushing is
rotated slowly under the cutter which it each down stroke strikes up cutting edge
cross the fice of the flange c Any other method of forming cutting edges may be
resorted to and any form of cutting surface may be formed in the face c of the
bushing, but the teeth must cut in the proper direction
The bushing is screwed into a stave, until say, the threads are all in the wood, in
this condition the buslung can be used till it works loose which it will do by reason of
the sumc causes which tend to work the old form of bushing loose
We will suppose the bushing has worked itself loose All that it is now necessary
to do is to turn the bushing with the usual tool made for that purpose, screwing it
further into the stive Such operation is not prevented as in the old form of bushing
by the flat flange, but with my bushing can be readily accomplished, for the cutting
fice c cuts and abrades the wood of the stave und permits of the bushing being
screwed into the stive to point further than it had at first occupied This screwing in
of loose bushing will tighten it in place and the result will be reached by a very
little screwing in of the bushing When it agun works loose a further screwing up
will tighten it again and so on till the buslung has got so far through the stave as to
render further screwing up hazardous
Figure 6 shows a bushing which has been a number of times screwed up, and
which has sent its flange into the wood of the stave Further screwing up and con-
sequent tightening could still be resorted to Screwing up my bushing tightens it by
reason of two cruses one is the entry of the thread into new wood so long as the
bushing has not penetrated through the stive, and the other 19 that at each screwing
up operation the cutting flange c cuts or ibrides the wood, but not as rapidly as the
thre id curios the bushing into tho stave, thus a very little tightening or screwing up
of the bushing causes the strain on the flange c to act to force the bushing out while
the thread tends to hold it in place, thus under the double strain the bushing is held
fast and each screwing up tends to renew the strain and consequently tighten the
bushing
In the old bushings shown in Figures 1 and 2 when the threads workes loose in the
stave, further renewal of the strain which held the bushing in place was impossible as
the flat flinge prevented any further penetration of the bushing
In the case of my improved bushing should no cutting teeth be formed on the
face c, then this portion of the article soon mikes a seat for itself and the bushing gets
into the condition of those shown in figure 1 and 2 The action of the cutters c¹ is
rather a grinding or abrading action breaking up the seat that would otherwise be
formed for the flange ind preventing the further screwing in of the bushing to tighten
By breaking up the wood, abrading, grinding, or cutting it, the flange is permitted
to enter the wood of the stavo a small distance at each tightening operation
it

page_text: 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 1
claim 18
1 The combination in a metallic bushing for a bung of a screw threaded body, and
a flange having a face formed at an oblique angle to the body, and cutting teeth
formed in the angular face of said flange, as for the purposes set forth
2 The combination in a metallic bushing for a bung, of a screw threaded body, and
a flango having a face formed at an angle to the body, and transverse cutting teeth in
the said angular face of the flange, substantially as described
Dated this 15th day of May 1888