Improvements in Fastenings for Bolts and the like.
Year: 1890

page_text: Date of Application, 17th Sept., 1890
.Complete Specification Left, 16th June, 1891-Accepted, 18th July, 1891
PROVISIONAL SPECIFICATION.
Improvements in Fastenings for Bolts and the like.
A communication from LA SOCIÉTÉ CIVILE, Proprietaire du Système de Serrage
par Boulons sans Filets ni Écrous (Georges Coulon, Director), of Paris, in
the Republic of France.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
M.I.M.E., do hereby declare the nature of this invention to be as follows:-
In English Patent No. 4821 of April 6, 1886, has been described a special
method of applying this bolt with taper grooves and wedge for laying down or
securing railway rails.
According to this invention I still retain the bolt and wedge and the fish
plate furnished with a longitudinal groove in which the wedge is placed and where
it works.
A number of experiments have induced my correspondents to extend considerably
the sphere of application of the bolt and the component parts of the bolt are now
arranged in such a way as to render it more complete and applicable to pieces
which are not provided with ribs by means of a disc or washer having on its upper
surface the groove into which the securing wedge fits, the said groove being
indispensable to enable the wedge to act properly and consequently indispensable
for attaining perfect attachment.
My correspondents have made a special study of the arrangement of this groove,
the indispensable element in this system, and after numerous experiments have been
successful in accurately determining or settling upon two arrangements.
This groove arranged, as has been pointed out before, in the movable washer or
in one of the pieces to be connected together as for example the fish plate in
laying railway rails acts not only as a check to prevent the arms of the wedge
from spreading apart but also contributes materially to rendering the attachment
of the said arms to the surfaces of the segments of the bolt, easy, regular and
immediate.
In one arrangement the upper part of the groove is equal in size to the width of
the wedge and the lower portion is arranged with an incline conformably to the
hypothenuse of a right angled triangle which stretches beyond the hole of the
washer of the piece.
In this way when the wedge is introduced its arms remain free until the confining
action of the bolt causes them to descend by making them close automatically upon
the reduced portion of the said bolt and this takes place with certainty and
regularity without the portion below the branches being altered by the planing-
space caused by the edge of the hole when the groove is plane.
We also obtain a similar result by imparting a slightly concave form to the
groove and rounding off the lower or under portion of the arms or branches
of the wedge.
Dated this 17th day of September 1890.
W. P. THOMPSON & BOULT,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Fastenings for Bolts and the like.
A communication from LA SOCIÉTÉ CIVILE, Proprietaire du Système de Serrage
par Boulons sans Filets ni Ecrous (Georges Coulon, Director), of Paris, in the
Republic of France.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
M.I.M.E., 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 :-
In English Patent No. 4821 of April 6, 1886 has been described a special
method of applying this bolt with taper grooves and wedge for laying down or
securing railway rails.
According to this invention I still retain the bolt and wedge and the fish plate
furnished with a longitudinal groove in which the wedge is placed and where
it works.
A number of experiments have induced my correspondents to extend considerably
the sphere of application of the bolt and the component parts of the bolt are now
arranged in such a way as to render it more complete and applicable to pieces
which are not provided with ribs by means of a disc or washer having on its upper
surface the groove into which the securing wedge fits, the said groove being
indispensable to enable the wedge to act properly, and consequently indispensable
for attaining perfect attachment.
My correspondents have made a special study of the arrangement of this groove-
the indispensable element in this system, and after numerous experiments have
been successful in accurately determining or settling upon two arrangements.
In the accompanying drawings
Fig. 1 shows two ungrooved pieces connected together by means of the wedge-
bolt supplemented by a grooved disc or washer.
Fig. 2 represents a special arrangement of groove, made either in one of the
pieces to be fastened together, the fish-plates for example, or applied by means of
a grooved disc or washer.
Fig. 3 shows a modified arrangement of the groove.
The groove C arranged as has been pointed out before, in the movable
washer D or in one of the pieces to be connected together as for example the fish-
plate in laying railway rails acts not only as a check to prevent the arms of the
wedge A from spreading apart, but also contributes materially in rendering the
attachment of the said arms to the surfaces of the segments of the bolt B, easy,
regular and immediate.
In the arrangement shown in Fig. 2 the upper part of the groove C is equal
in size to the width of the wedge A and the lower portion is arranged with an
incline y conformably to the hypothenuse of a right angled triangle which stretches
beyond the hole z of the washer or plate.
In this way when the wedge A is introduced its arms which at their lower ends
are each provided with a bevelled edge or chamfer A¹ beginning at the head and
terminating in a point before it reaches the other end remain free until the
confining action of the bolt causes them to descend by making them close
automatically upon the reduced portion of the said bolt, and this takes place with
certainty and regularity, without the portion below the branches being affected by
the sort of cutting or planing action of the edge of the hole when the groove
is plane.
A similar result is also attained by imparting a slightly concave form to the
groove and rounding off the lower or under portion of the arms or branches of
the wedge as shown in Fig. 3.

page_text: Having now particularly described and ascertained the nature of the said
invention, as communicated to me by my foreign correspondents, and in what
manner the same is to be performed, I declare that what I claim is :-
1. The two arrangements of grooves Figures 2 and 3 forming either in a
movable disc or in one of the pieces to be secured together essentially as has been
described, these arrangements having for their object to regulate the operation
of the system of bolts without threads or nuts, and to obviate the serious
inconveniences which arise when the wedges act upon a plane surface substantially
as described and illustrated in the accompanying drawings.
2. In fastenings such as described the combination with a recessed bolt or pin
such as B of a forked wedge such as A having inclined or curved surfaces such
as A' substantially as and for the purpose described and illustrated in the
accompanying drawings.
3. In fastenings such as described the combination with a recessed bolt or pin
such as B and forked wedge such as A A¹ of a washer or collar having inclined or
curved surface to correspond with the surfaces A' on the wedge substantially as
described and illustrated in the accompanying drawings.
Dated this 16th dve of T. 1901
W. P. THOMPSON & BOULT,
Agents for the Applicant.
W. P. THOMPSON & BOULT,
Agents for the Applicant.