Improvements in or connected with Girder Frameworks for Use in 靠 Mines and other Places.
Year: 1895

page_text: Date of Application, 19th Apr., (1895)|
Sh.
1.
Complete Specification Left, 15th Jan., 1896-Accepted, 15th Feb., 1896
PROVISIONAL, SPECIFICATION.
!
Improvements in or connected with Girder Frameworks for Use in
靠 Mines and other Places..
:
I, WILLIAM FIRTH of Water Lane, Leeds, in the County of York, Iron
Merchant, do hereby declare the nature of this invention to be as follows:-
.
The object of my invention is to construct girder frameworks for use in mines.
and other places in such a manner that the props and girders forming such frame-
works may be readily erected in position, whilst at the same time the danger
of the prop slipping or being forced down by lateral pressure entirely obviated.
According to my invention I employ props and girders constructed of I iron or
steel, and through the web at the upper ends of the props I stamp out I or shaped
perforations, of a size suitable for the insertion of the ends of the girder. At the
base of the perforation and on the web, I rivet or otherwise attach short angle
iron pieces, which act as a seat for the girder ends; and if desired an entire
section or portion of the web may be removed instead of forming I or shaped.
perforations.
F
On the lower flange and at a suitable distance from either end of the girder,
I shrink or otherwise connect an iron shoulder, which prevents the girder slipping.
through the perforations in the props, beyond the required distance.
When props and girders as above described are employed, the ends of the
girders are placed in the perforations situated in the webs of the props, the flange
of the girder resting on the lower part of the perforations and on the angle irons
which are attached to the webs, whilst the shoulders on the girder ends effectually
prevent any slipping of the props:
!
H
Improvements in or connected with Girder Frameworks for Use in
Mines and other Places.
..
I, WILLIAM FIRTH, of Water Lane, Leeds, in the County of York, Iron
Merchant, 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:-
The object of my invention, is to construct girder frameworks for use in mines
and other places, in such a manner that the props and girders forming such
frameworks may be readily erected in position, whilst at the same time the
danger of the prop slipping or being forced down by lateral pressure, is entirely
obviated.
In order that my invention may be clearly understood I will proceed to describe
same with reference to the accompanying drawing, in which similar letters refer to
like parts in all the figures.

page_text: Fig. is an elevation of a girder framework constructed according to my
invention, and
Fig. 2 is a side view of a prop employed in the construction of the framework
shewn at Fig. 1.
Figs. 3, 4, 5, 6, and 7, are detail views.
According to my invention, I employ props A and girders B constructed of
I iron or steel, and through 'the web C at the upper ends of the props A, I stamp
out I shaped perforations D of a size suitable for the insertion of the ends of the
girder B. At the base of the perforation D and on the web C of the prop A,
I rivet or otherwise attach short angle iron pieces E, which act as a seat for the
girder ends, and on the lower flange of the girder BI shrink or otherwise connect,
a shoulder F, which prevents the girder slipping through the perforations in the
props, beyond the required distance.
7
When props and girders as above described are employed, the ends of the
girders B are placed in the perforations D, the flange of the girder B resting on
the webs 'C and the angle iron pieces E, whilst the shoulders F effectually prevent
any slipping of the props A, through being forced down by lateral pressure or
from 'other cause.
If desired shaped perforations may be made in the web C, as seen at
Fig. 6, or an entire section may be cut from the web C as seen at Fig:7; and
in both of these cases 'the girder B would be entirely supported by the angle
irons E and webs 'C.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
1. The props A, having their webs C perforated for the reception of the ends of
the girder B, substantially as and for the purposes set forth.
2. The combination of the props A 'having perforations D in same, with the
girder B having shoulders F on the flange of same, substantially as 'aud 'for the
purposes set forth.
3. The props A, having their webs C cut substantially as shewn at Figs. '6
and 7 of the accompanying drawings for the purposes set forth.
4. The angle irons E substantially as and for the purposes set forth.
5. The general arrangement, construction, and combination of the various parts
forming improvements in or connected with girder frameworks for use in mines
and other, places, substantially as described and for the purposes set forth.
Dated this 15th day of January 1896.
BREWER & SON,
London and Leeds, Agents for the Applicant.