IMPROVEMENTS IN THE CONSTRUCTION OF BEAMS OF THAT CLASS KNOWN AS BOX OR TROUGH BEAMS
Year: 1878

page_text: LETTERS PATENT to Thomas Hudson, of Coatbridge, in the County of Lanark,
"
North Britain, for the Invention of IMPROVEMENTS IN THE CONSTRUCTION
OF BEAMS OF THAT CLASS KNOWN AS BOX OR TROUGH BEAMS,"
PROVISIONAL SPECIFICATION left by the said Thomas Hudson at the Office
of the Commissioners of Patents on the 9th February 1878.
THOMAS HUDSON, of Coatbridge, in the County of Lanark, North Britain.
" IMPROVEMENTS IN THE CONSTRUCTION OF BEAMS OF THAT CLASS KNOWN AS BOX
OR TROUGH BEAMS."
This Invention, which relates to improvements in the construction of beams or
girders of that class known as box or trough beams or girders, has for its object to
enable the troughs of such beams or girders to be formed by hand processes, or by
simple and inexpensive machinery, and of any required length and dimensions of
section, thus avoiding the expensive machinery necessary for producing those beams
of the class herein-before mentioned, and known by the name of "Zoré's Beam,"
wherein the trough portion is rolled in one piece.
In the improved beams of the class to which this Invention relates the trough
portion thereof is formed of two continuous lengths, each such continuous length
consisting of three members, namely, a vertical member, from the upper part of
which a horizontal member projects inwards, and from the lower part of which
another horizontal member projects outwards.
The trough is formed by riveting the two upper horizontal members together;
either by overlap or with butt joints. Any two continuous members thus put
together constitute a trough girder, and by riveting continuous plates across the
two lower or outwardly projecting horizontal members a box girder is produced.
:

page_text: The upper and lower horizontal flanches on each half of the trough may either
be produced in presses, or between rolls, or in cases where these are not provided
the plates may be heated and the horizontal members bent over on blocks or dies
by the use of mauls.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Thomas Hudson in the Great Seal Patent Office on the 7th
August 1878.
"IM-
THOMAS HUDSON, of Coatbridge, in the County of Lanark, North Britain.
PROVEMENTS IN THE CONSTRUCTION OF BEAMS OF THAT CLASS KNOWN AS Box OR
TROUGH BEAMS."
This Invention, which relates to improvements in the construction of beams or
girders of that class known as box or trough beams or girders, has for its object to
enable the troughs of such beams or girders to be formed by hand pressure or by
simple and inexpensive machinery, and of any required length and dimensions of
section, thus avoiding the expensive machinery necessary for producing those beams
of the class herein-before mentioned, and known by the name of "Zore's beam,"
wherein the trough portion is rolled in one piece.
In the improved beams of the class to which this Invention relates the trough
portion thereof is formed of two continuous lengths, each such continuous length
consisting of three members, namely, a vertical inember, from the upper part of
which a horizontal member projects inwards, and from the lower part of which
another horizontal member projects outwards.
The trough is formed by riveting the two upper horizontal members together,
either by overlap or with butt joints. Any two continuous members thus put together
thus constitute a trough girder, and by riveting continuous plates across the two
lower or outwardly projecting horizontal members a box girder is produced.
The upper and lower horizontal flanches on each half of the trough may either
be produced in presses or between rolls; or in cases where these are not provided
the plates may be heated and the horizontal members bent over on blocks or dies
by the use of mauls.
The accompanying Drawing shews in cross section a trough beam constructed on
'my plan.
a, a', are the upper horizontal members; b, b', the lower horizontal members;
c, c', the vertical members.
It will be observed that each horizontal member forms an obtuse angle with its
part of the vertical member, that they are of unequal length, and that when put
together, as shewn in the Drawing, the thicker parts form the top of the beam, and
the bottom flanches and the thinner parts form the sides of the beam.
Having described the nature of my said Invention, and explained the manner of
performing it, I would have it understood that what I consider to be novel and

page_text: original, and therefore claim as the Invention secured to me under the Letters
Patent herein-before in part recited is, the constructing beams in parts of angular
section, substantially as herein-before described with reference to the accompanying
Drawing.
In witness whereof, I, the said Thomas Hudson, have hereunto set my hand
and seal, this Sixth day of August, in the year of our Lord One thousand
eight hundred and seventy-eight.
THOMAS HUDSON. (L.S.)