Year: 1897

page_text: I, LIONEL DE LAUTOUR WELLS, of the Metropolitan Fire Brigade Head Quarters,
Southwark, Commander in the Royal Navy, do hereby declare the nature of this
invention to be as follows:-
-
The object of my invention is to increase the strength of ladders of the kind in
which the ends of the rounds are inserted in socket pieces attached to the side
bars. In such ladders as heretofore usually constructed, practically the entire
weight any round is at any time supporting is borne by the screws or equivalent
devices whereby the socket pieces of such round are fastened to the side bars of
the ladder and the resulting strain is in the nature of a shearing strain on the
said screws or their equivalents. Now according to my present invention, in order
to obviate this disadvantage and also to spread the weight over a greater portion
of the length of the side bars, I adopt the following construction.
I make the socket pieces with flanges or projections adapted to bed upon the side
bars so as to transmit much of the load on to the front sides (or portions thereof)
of the side bars, thus considerably reducing the shearing strain upon the screws or
equivalent fastening devices. In one construction I form a longitudinal shoulder
or series of shoulders at the front along the inner side of each side bar such as to
form a bed or beds to receive and support the Hanges or projections of the socket
pieces. My invention can be applied in the construction of ladders of various
kinds and for various purposes.
My invention will render it possible to use smaller screws or the like for securing
the socket pieces, thereby mitigating the weakening effect upon the side bars of
a ladder which results from the making of numerous holes therein for the fasten-
ing devices. Also the arrangement of the rounds of a ladder with their axes when
desired practically in a common plane will be facilitated. Furthermore rounds
may be readily removed and replaced and their positions altered without seriously
weakening the side bars of the ladder.
I, LIONEL DE LAUTOUR WELLS, of the Metropolitan Fire Brigade Head Quarters,
5 Southwark, Commander in the Royal Navy, do hereby declare the nature of this
[Price 8d.]

page_text: 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 increase the strength of ladders of the kind in
which the ends of the rounds are inserted in socket pieces attached to the side
-bars In-such-ladders as heretofore usually constructed, practically the entire
weight any round is at any time supporting is borne by the screws or equivalent
devices whereby the socket pieces of such round are fastened to the side bars of
the ladder and the resulting strain is in the nature of a shearing strain on the
said screws or their equivalents. Now according to my present invention, in order
to obviate this disadvantage and also to spread the weight over a greater portion
of the length of the side bars, I adopt the construction illustrated in the accom-
panying drawings, in which
Fig. 1 shows in longitudinal section a ladder constructed according to this inven-
tion. Figs. 2 and 3 are sections on the lines and y y respectively of Fig. 1,
but drawn to a larger scale than that figure, showing one side of the ladder with
socket piece and the end portion of a round carried thereby. Fig. 4 is a face view
of the socket piece shown in Figs. 2.and 3.
According to this invention each socket piece 1 is formed with a flange or pro-
jection 1 adapted to bed upon the corresponding side bar 2 so as to transmit much
of the load on to the front side of the side bar, thus considerably reducing the
shearing strain upon the screws 3 or equivalent fastening devices used to secure
the socket piece in position. In the construction illustrated a longitudinal
shoulder 2 is formed along the inner side of each side bar such as to form a bed or
beds to receive and support the flanges or projections 1" of the socket pieces. As
will be seen from Fig. 3 the end portions of the rounds 4 are cut away or recessed
so that their upper parts bed upon the shoulder 2". Each side bar 2 may, if
desired, be formed with a series of shoulders instead of with one continuous shoulder
as shown. My invention can be applied in the construction of ladders of various
kinds and for various purposes.
My invention will render it possible to use smaller screws or the like for securing.
the socket pieces in place thereby mitigating the weakening effect upon the side bars
of a ladder which results from the making of numerous holes therein for the fasten-
ing devices. Also the arrangement of the rounds of a ladder with their axes when
desired practically in a common plane will be facilitated. Furthermore rounds
may be readily removed and replaced and their positions altered without seriously
weakening the side bars of the ladder.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:
A ladder in which the rounds are attached to the side bars by means of socket
pieces formed with flanges or projections, the said side bars being formed along
their inner sides with shoulders on which the flanges or projections of the socket
pieces bed substantially as described with reference to and shown in the accompany-
ing drawings.
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101
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