Year: 1888

page_text: 1, JAMES HAYWOOD of Kingswood, Wotton-under-Edge in the County of Glouces-
tershire, 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 following statement :—
.
My present invention relates to split cotters or pins such as are used for the
purpose of securing loose collars onto shafts, or for preventing shafts, pins, pivots or
collars, or other like parts of machinery moving out of required position.
Hitherto it has been found in most instances difficult and cumbersome in
commencing to force drive or place the split pin or cotter into the hole or slot formed
for its reception, and when the said pin has been forced, driven or placed therein it
has also been found difficult or cumbersome in commencing to force or press the ends
of the pin apart, which is necessary for the purpose of securing it in the hole or slot ;
the object therefore of this invention is to remedy these defects by constructing the
pins or cotters in such a manner that they may be more readily placed or pressed
into the holes, and have their ends bent back expeditiously and with ease, I attain
this by forming the improved split pins or cotters in the manner hereinafter described
with reference to the accompanying drawings, of which the following is a description.
Fig. 1. is an elevation of one form of a split pin or cotter constructed according to
my improvements for facilitating the placing of the same in the hole or slot.
Fig. 2. is an elevation of a split pin or cotter constructed according to my improve-
ments for facilitating the pressing of the same in the hole or slot and also for readily
pressing its ends back.
Figs. 3 and 4 illustrate my improvements applied to another form of pin or
cotter, and Figs. 5 and 6 are elevations of my improved pins or cotters, fig. 5 being a
closed pin and fig. 6 an open one, and both being constructed with my improvements
for readily pressing their ends back.
Figs. 7 and 8 are respectively front and side elevations of a shaft and collar
showing my improved split pin securing collar in position. Like letters designate
similar parts in each fionre.

page_text: The pins A may be of any ordinary design, and of a round, oval, rectangular, or
other section. They may either be closed as shown at figs. 1, 2 and 5, or open as
shown at figs. 3, 4 and 6.
My improvements consist in forming the ends thereof tapered, pointed, or inclined
as shown at b figs. 1, 2, 3, and 4, and also where preferred to form one half or leg
somewhat shorter than tho other as shown at c, figs. 2, 4, 5 and 6.
By means of forming the split pins or cotters, with their ends tapered, pointed or
inclined as described and illustrated at figs 1, 2, 3, and 4, the said ends are more
easily and expeditiously introduced into the holes formed for their reception,
and thereby the difficulty hitherto experienced is obviated and also by means of
forming one leg or half or end shorter than the other as shown at c figs. 2 4, 5,
and 6, the ends may be easily bent over by means of a hammer or other ordinary
instrument usually employed for the purpose of driving the pins or cotters into the
holes for their reception, and the difficulty hitherto experienced in commencing to
press the same apart is obviated.
I would have it well understood that my improvements are applicable to every kind
of split cotter or pin which are used for the purpose specified or other similar purpose.
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 tapering inclining, or pointing of the ends of split cotters or pins,
substantially as described, and for the purpose specified, and illustrated at figs. 1, and 3
of the accompanying drawings.
2. Forming split cotters or pins with one leg or end longer than the other
substantially as described and shown at figs. 2, 4, 5, and 6 of the drawings annexed.
3. The construction of split pins or cotters with tapered inclined or pointed ends,
and with one half, leg, or end shorter than the other substantially as described and
for the purpose specified, and illustrated at figs. 2. and 4 of the drawings hereunto
attached.
Dated this 16th day of November 1888