Improvements relating to Rivets and the like.
Year: 1896

page_text: Date of Application, 24th Nov., 1896
Complete Specification Left, 24th Aug.. 1897-Accented 9th Oct. 1897
Improvements relating to Rivets and the like.
I, ALFRED PEARSE, of The Close, Flitwick, Bedfordshire, Artist, do hereby
declare the nature of this invention to be as follows:-
My invention pertains to improvements in the design of rivets and has for its
object to provide for an expeditious rivet fastening which is effectual and secure
and which can when so designed be capable of extraction.
My invention consists in the provision of a rivet pin with a bifurcated
extremity which is capable of compression and which after being inserted into
a corresponding hole provided in a rivet sleeve previously inserted and closely
fitting into the hole or bed, distends so that the respective heads of the bifurcated
end engage with contiguous sides of the hole in the rivet sleeve and firmly secure
the pin to the sleeve and the integral and opposed parts in the rivet hole.
In carrying my invention into effect I provide a pin preferably of square section
having a rivet head and having a bifurcated recess of an elongated V form, so
that the compression of the respective extremities is allowed in the elasticity
of the length of the bifurcated arms. The extremities are formed as heads
having a projection upon each side.
The rivet sleeve is provided with a circular exterior to fit the rivet hole, the
interior hole preferably of square shape fitting snugly upon the rivet pin. The head
of the rivet sleeve is provided on each side of the square hole with an extended
recess into which enter the protruding heads of the bifurcated extremity of the
pin.
The heads of the bifurcated end of the pin may be provided with inclined sides,
or the aperture of the rivet sleeve may be provided with two opposing inclined
surfaces corresponding to the extremity of the pin so that its introduction into
the rivet sleeve may be facilitated. The head of the rivet sleeve may be so formed
as to allow of the head of the bifurcated extremity of the rivet to be gripped and
compressed for the extraction of the pin and sleeve when required.
I may carry my invention into effect alternatively by using the bifurcated pin
as the rivet, and I may in such a case provide the pin of circular section or any
other configuration to suit the hole into which the pin may be designed to enter,
thereby dispensing with the use of the rivet sleeve.
It will be seen that it is required to determine the length of the pin and sleeve
to a corresponding extent and to suit the hole into which they are thrust.
I do not limit my invention to any particular section of pin, or to any particular
section of sleeve, nor do I limit myself to the shape or configuration of the
respective heads of the bifurcated end of the pin.
Instead of forming the end of the pin bifurcated into two similar and integral

page_text: arms, I may provide the pin of the same diameter throughout, and provide at
the extremity thereof a supplementary spring arm which is depressed on entry
into the hole of the rivet sleeve or into the rivet hole and on emerging at the
opposite end is extended and prevents the extraction of the pin.
Dated this 24th day of November 1896.
MARKS & CLERK,
18, Southampton. Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.
I, ALFRED PEARSE, of The Close, Flitwick, Bedfordshire, Artist, 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 pertains to improvements in the design of rivets and has for its
object to provide for an expeditious rivet fastening which is effectual and secure
and which can when so designed be capable of extraction.
My invention consists in the provision of a rivet pin with a bifurcated
or trifurcated extremity which is capable of compression, and which after being
inserted into a corresponding hole provided in a rivet sleeve previously inserted
and closely fitting into the hole or bed, distends so that the respective heads of
the bifurcated or trifurcated end engage with contiguous sides of the hole in
the rivet sleeve, and firmly secure the pin to the sleeve and the integral and
opposed parts in the rivet hole.
The accompanying drawings illustrate different methods of carrying my
invention into effect as follows:-
Figure 1 is a longitudinal sectional elevation with two end views of a rivet,
for metal work, belts and the like.
Figure 2 is a partial plan of the corner of a box, showing one of the improved
rivets in situ.
Figure 3 is a modification of the rivet shown in Figure 1.
Figure 4 is a longitudinal section with two end views of a square rivet.
Figure 5 is a longitudinal section with two end views of a like rivet built up
from single strips of metal.
In carrying my invention into effect as illustrated in Figure 1 of the drawings,
I provide a pin A which may be of square section, having a rivet head B and a
bifurcated recess C of an elongated V form, so that the compression of the
respective extremities b, b, is allowed in the elasticity of the length of the
bifurcated arms though these arms may be made trifurcated with the same result.
The extremities b, b, are formed as heads having a projection upon each side.
A rivet sleeve D is provided with a circular exterior to fit the rivet hole, the
interior hole fitting snugly upon the rivet pin A. The head E of the rivet sleeve
is provided on each side of the square hole with an extended recess a, a, into
which the protruding heads b, b, of the bifurcated extremity of the pin spring
when the rivet pin A is pushed home into its place.
The heads of the bifurcated end of the pin may be provided with inclined sides,
or the aperture of the rivet sleeve may be provided with two opposing inclined

page_text: surfaces corresponding to the extremity of the pin so that its introduction into
the rivet sleeve may be facilitated. The head of the rivet sleeve may be so formed
as to allow the head of the bifurcated extremity of the rivet to be gripped and
compressed for the extraction of the pin and sleeve when required.
Referring to Figure 2 of the accompanying drawings:-In this method of con-
struction no sleeve such as D is employed, and in joining the two sides d, d, of the
box shown in dotted lines, a hole is drilled through across the corners of the box,
and a circular rivet pin A having a head B of the shape shown, and spring ends b, b,
is forced through this hole. The head then comes to its bearing in notches cut
for the purpose in the box, while the ends b, b, spring out into similar notches
cut at the other side, and thus clinch or fasten the corners of the box together.
Thus the bifurcated pin A is used as rivet, and it may be made of any section
of pin and head according to the purpose for which it is required.
Referring to Figure 3 of the accompanying drawings, this illustrates a slight
modification of the rivet shown in Figure 1. The rivet pin A with its head B,
is bifurcated, and has extremities b, b, but these extremities instead of springing
into grooves in the head E of the sleeve 1), spring over and catch upon the end
of the sleeve D as shown, while a dummy rivet head G is fixed in position against
the collar H, which is carried by the sleeve D, and in reality forms a flat head.
Referring to Figure 4 of the accompanying drawings, this modification consists
in so forming the bifurcated end A that its length does not reach all the way
through the sleeve D, but only part of the distance. Suitable grooves e, e, are
formed in the sleeve D at the same distance in as the ends b, b, would be when
the pin A is pushed home, so that the attachment in this case is made between
the ends b, b, of the bifurcated pin and the sleeve D itself. This form of rivet
may be of a square section as shown, or of any other suitable configuration.
Referring to Figure 5 of the accompanying drawings, this illustrates a method
of forming the rivet and sleeve of two strips of thin metal folded and bent up in
the manner clearly shown in the drawings. The principle of fastening in this
rivet is identical with the modifications hereinbefore described, with reference
to Figures 1 and 3 of the drawings, riz.-the bifurcated pin A has ends bb
which spring out and grip the flange formed on the end of the sleeve D. This
design of rivet is of course only intended for very light work.
I do not limit my invention to any particular section of pin, or to any particular
section of sleeve, nor do I limit myself to the shape or configuration of the
respective heads of the bifurcated end of the pin as I may also trifurcate or
otherwise divide the end of the pin and arrange corresponding recesses into which
these ends may spring.
Instead of forming the end of the pin bifurcated into two similar and integral
arms I may provide the pin of the same diameter throughout, and arrange at
the extremity thereof a supplementary spring arm which is depressed on entry
into the hole of the rivet sleeve, or into the rivet hole, and on emerging at the
opposite end is extended and prevents the extraction of the pin.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
1. A rivet fastening consisting of a bifurcated, trifurcated or other stem upon
one head, and a sleeve upon the other, the latter fitting upon the former, while
hooked extremities of the stem engage with recesses or sides of the sleeve,
substantially as hereinbefore described.
2. The improved rivet hereinbefore described with reference to Figures 1 and 3
of the accompanying drawings.
3. The improved rivet hereinbefore described with reference to Figure 2 of
the accompanying drawings.

page_text: 4. The improved rivet hereinbefore described with reference to Figure 4 o
the accompanying drawings.
Dated this 24th day of August 1897.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicant.