Improvements in Clip Washers or Fastenings for Attaching Corrugated or Plain Flat Sheet Iron to Angle or Tee Iron Supports.
Year: 1891

page_text: Date of Application, 19th Mar., 1891-Accepted, 25th Apr., 1891
COMPLETE SPECIFICATION.
Improvements in Clip Washers or Fastenings for Attaching
Corrugated or Plain Flat Sheet Iron to Angle or Tee Iron
Supports.
We, WILLIAM BRUCE and ARTHUR STILL, both of Norfolk Street, Liverpool,
in the County of Lancaster, Iron Roof Manufacturers, 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 in a cheap and simple fastening to attach corrugated or
flat sheet metal to angle iron, tee iron or other supports without its being necessary
to bore holes into such angle or tee iron. The usual fastening hitherto has been a
hookbolt hooked over the edge of one flange of the angle or tee iron, the stem of
the bolt passing across the flange and through a hole in a corrugated or flat sheet
placed against the other flange and a nut screwed on to bind the whole together.
This fastening is insecure as the nut being on the outside is easily removed.
In this improved fastening device, we use ordinary straight screw bolts with
a square, nicked cup or other head at one end, and a nut at the other. This
bolt is passed through from the outside of the corrugated or flat sheet iron close
to the edge of the angle or tee iron, and over the screwed end is passed a clip
washer of the form shown, which is held in place by a screwed nut, which when
screwed up draws the hole firmly and tightly together. These clip washers
may be made of malleable cast iron or other metal at a small cost.
Referring to the accompanying drawings
:-
Figure 1 is a sectional plan of a portion of the side of a corrugated iron building
secured to angle iron horizontal supports or rails.
Figure 2 is an inside view of the same.
Figure 3 is a vertical cross section.
Figure 4 bolt with nicked cup head.
a, is the angle iron horizontal support.
b, the corrugated iron sheet which is to be fastened to it.
c, the fastening bolt with a square head.
d, is the clip washer which fits closely on to the thin edge of the angle iron
horizontal support and the flute of the corrugated iron sheet.
e, is the nut screwed on, which binds the whole together.
The head of the bolt c is prevented from being turned from the outside and
unscrewed, by reason of the square head fitting into the flutes of the corrugated
sheet, it would therefore be impossible to remove the bolt from the outside by
unscrewing it.
An alternative form of bolt with a nicked cup head is shewn at c c which can be
used with a screwdriver from the outside.
The clip washer d may have a screw thread cut in it to fit the threads upon the
bolt, thus acting as a nut, the bolt would then have to be turned with a screwdriver
from the outside, but in most cases the clip washer d should slip freely on to the
bolt and the nut screwed on to hold the whole together from the inside.
When flat sheet iron is used, the cupped surface of the clip washer could be
dispensed with, and the back of the washer made flat to suit the flat surface of the
sheets.
с
In some cases the fastening bolt c would be made without a nick in the head, the
neck would then be formed square to prevent the bolt being turned round from the
outside.

page_text: Having now particularly described and ascertained the ature of our said inven-
tion, and in what manner the same is to be performed, 1. declare that what we
claim is :-
:-
A fastening for attaching corrugated or flat sheet metal to angle or tee iron, or
other supports without the necessity of boring holes in said supports, said fastening
consisting of a clip or washer d adapted to clip the angle or tee iron at one edge
thereof, and of a bolt c adapted to be passed through the sheet metal and washer
from the outside, and to be secured in place by a nut e or equivalent device on the
inside, substantially as described.
Dated the 18th day of March 1891.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicants.