An Improved Bolt for Securing Corrugated Metal Sheets Together or to Metallic or other Structures.
Year: 1889

page_text: Date of Application, 18th Oct., 1889
Complete Specification Left, 18th July, 1890-Accepted, 23rd Aug., 1890
PROVISIONAL SPECIFICATION.
An Improved Bolt for Securing Corrugated Metal Sheets Together
or to Metallic or other Structures.
I, HENRY SMITH, of The Brierley Hill Iron Works, near Dudley, in the County
of Worcester, Fencing Manufacturer, do hereby declare the nature of this invention
to be as follows:-
This invention consists of the herein described improved bolt for securing corrugated
galvanized or other corrugated metal sheets together or for securing the said sheets to
metallic or other structures.
Heretofore for this purpose it has been customary to use bolts of the ordinary kind
which are flat underneath the head an ordinary flat washer being usually employed
between the head of the bolt and the sheet so as the better to close the hole in the
sheet. As the hole through which the bolt passes is in the top of the corrugation,
the bolt head, or the washer when a washer is used, cannot, take a proper bearing on
the sheet and cover the hole therein so as to prevent moisture running through the
hole, which defect it is one of the objects of my invention to overcome.
In carrying out my invention instead of making the bolt head flat underneath as
heretofore I make it hollow of a shape to fit on to the corrugation thereby enabling
it to take a bearing all round the hole and effectually prevent any moisture passing
therethrough. The bolt head by preference made larger than heretofore so as to
thoroughly cover the hole in the metal sheet and enable the use of a washer to be
dispensed with. Moreover by making the bolt head of this shape the bolt is effectually
prevented from turning round whilst the nut is being screwed on the bolt at the other
side of the sheet. My invention is applicable to bolt heads of any shape whether
square hexagonal round oblong or of other form.
In a modification of my invention the underside of the bolt head is rounded
instead of being hollowed so as to fit in and along the bottom of a corrugation this
kind being more particularly for use in places where the corrugated sheets are vertical
and the bolt is not required to pass through the top of the corrugation.
Dated this 12th day of October 1889.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.
Agent for the applicant.
COMPLETE SPECIFICATION.
An Improved Bolt for Securing Corrugated Metal Sheets Together
or to Metallic or other Structures.
I, HENRY SMITH, of The Brierley Hill Iron Works, near Dudley, in the County of
Worcester, Fencing 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 :-
This invention consists of the herein described improved bolt for securing corru-
gated galvanized or other corrugated metal sheets together or for securing the said
sheets to metallic or other structures.
Heretofore for this purpose it has been customary to use bolts of the ordinary
kind which are flat underneath the head an ordinary flat washer being usually employed
between the head of the bolt and the sheet so as the better to close the hole in the
sheet. As the hole through which the bolt passes is in the top of the corrugation,
the bolt head, or the washer when a washer is used cannot take a proper bearing
on the sheet and cover the hole therein so as to prevent moisture running through
the hole, which defect it is one of the objects of my invention to overcome.

page_text: Fig. 3 is a plan of a bolt formed according to this invention for use where the head
comes on the top of a corrugation ;
Fig. 4 shows the shank and head portion of the same separately;
Figs. 5 and 6 represent in elevations a modified form of the said bolt for use in a
valley between two corrugations;
Figs. 7 and 8 shew the bolt represented by Figs. 1, 2 and applied to securing a
corrugated sheet to part of a structure and
'
Figs. 9 and 10 shew a smaller size of the same bolt as used in fixing two corrugated
sheets together.
The same letters of reference indicate the same or corresponding parts in all the
Figures of the drawing.
a is the head of the bolt and b is the screwed shank of the same. The corrugated
sheets are marked c. In carrying out my invention instead of making the bolt head a
flat underneath as heretofore I make it hollow (Figs. 1, 2, 3, 4, 7, 8; 9 and 10) of a
shape to fit on to the corrugation thereby enabling it to take a bearing all round the
hole d through which the bolt passes and effectually prevent any moisture passing
therethrough. The bolt head a is by preference made larger than heretofore as shewn
so as to thoroughly cover the hole d in the metal sheet c and enable the use of a
washer to be dispensed with. Moreover by making the bolt head a of this shape the
bolt is effectually prevented from turning round whilst the nut is being screwed on
the bolt at the other side of the sheet. My invention is applicable to bolt heads of
any shape whether square hexagonal round oblong or of other form.
In the modification of my invention shewn by Figs. 5 and 6 the underside of the
holt head a is rounded instead of being hollowed so as to fit in and along the bottom
of a corrugation this kind being more particularly for use in places where the
corrugated sheets are vertical and the bolt is not required to pass through the top of
the corrugation.
The head a and the shank 6 of the bolt are usually forged from one piece of iron or
other metal but when the bolt heads a are extra large they are for convenience of
manufacture made by preference from sheet metal and bent to the required curve and
the shank part b fixed thereto by having a reduced square end (see Fig. 4) which
passes through a corresponding hole in the head and is rivetted over so as to be firmly
fixed thereto, or the shank b may be passed through the head a and rivetted over at a¹
as shown by dotted line on Figs. 1, 2 and 3.
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 :-
1st. The herein described improved bolt for securing corrugated metal sheets
together or to metallic or other structures having the head portion enlarged and
hollowed underneath so as to fit on to the corrugations of the said sheets substantially
as and for the purposes hereinbefore set forth, and,
2nd. The modified form of the bolt forming the subject of the preceeding claiming
clause hereof in which the head portion of the bolt is rounded underneath so as to fit
into the said corrugations.
Dated this 16th day of July 1890
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.