Improvements in and in Means for Cutting and Cropping Tee, H, Channel, Bulb, Z, and other Irregular Sections of Metal Bars.
Year: 1889

page_text: Date of Application, 17th Aug., 1889
Complete Specification Left, 17th Jan., 1890-Accepted, 22nd Feb., 1890
PROVISIONAL. SPECIFICATION.
Improvements in and in Means for Cutting and Cropping Tee, H,
Channel, Bulb, Z, and other Irregular Sections of Metal Bars.
I, CHARLES JOHN WESTWOOD, Civil Engineer, of Napier Yard, Millwall, in the
County of Middlesex, do hereby declare the nature of this invention to be as
follows:-
This Invention relates to certain improvements in and in means for cutting and
cropping tee, H, channel, bulb, Z, and other irregular sections of metal bars, the
object being to so operate a cutting edge against or upon the bars of the section, that
the cutting or cropping will be effected without unduly distorting the end or ends of
the cropped or cut metal.
In the cutting of bars of the various sections it has hitherto been the practice to
punch or slot them apart and subsequently to machine-tool or to dress the ends by
smith-work.
In carrying this Invention into effect I provide a stationary slotted or pierced
shearing block, the piercing or aperture whereof is of shape, corresponding to the
section of the metal bar to be operated upon.
In combination with this stationary block I provide a corresponding and similar
block arranged to slide reciprocatingly face to face against the stationary block.
The apertures in these blocks are provided with cutting edges. The cutting edges
in the aperture of the stationary block is opposite to the cutting edges in the movable
block.
Before proceeding to effect the shearing, the apertures in both blocks are brought
in sectional line with each other. The bar to be cut is then passed into the apertures,
thus admitting the lower cutting edges of the aperture in the movable shear-block to
actuate under the projecting parts of the bar to be cut so as to operate upon the lower
part of the bar and thus complete the line of the corresponding cutting edges.
The movable shear operates across the section of the metal at an angle of traverse
of 45°.
According to a modification the movement of the movable shear may be effected
from a centre (or a movable centre) so as to have motion in a radial path during the
cutting traverse of the shear.
A very great saving of both material and labour is effected by this process and
means.
COMPLETE SPECIFICATION.
Improvements in and in Means for Cutting and Cropping Tee, H,.
Channel, Bulb, Z, and other Irregular Sections of Metal Bars.
CHARLES JOHN WESTWOOD Civil Engineer, of Napier Yard Millwall, in the County
of Middlesex 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 relates to certain improvements in and in means for cutting and
cropping tee, H, channel, bulb, Z, and other irregular sections of metal bars, the
object being to so operate a cutting edge against or upon the bars, of the section, that

page_text: the cutting or cropping will be effected without unduly distorting the end or ends of
the cropped or cut metal.
In the cutting of bars of the various sections it has hitherto being the practice (a)
in cutting iron to slot it through with a punching press and afterwards "nick" the
table with a cold "set" and break it off (b).
In the case of other irregular sections the method has been to cross cut with hammer
and chisel and then break off and afterwards square up or dress the ends to the length
required.
In carrying this invention into effect I provide a stationary slotted or pierced
shearing block, the piercing or aperture whereof is, of shape corresponding to a
portion of the section of the metal bar to be operated upon.
In combination with this stationary block, I provide a corresponding and similar
block arranged to slide reciprocatingly face to face against the stationary block.
The apertures in these blocks are provided with cutting edges. The cutting edges
in the aperture of the stationary block are opposite to the cutting edges in the movable
block.
Before proceeding to effect the shearing, the apertures in both blocks are brought
in sectional line with each other. The bar to be cut is then passed into the aperture
thus admitting of the lower cutting edges of the aperture in the movable shear-block
to actuate under the projecting parts of the bar to be cut so as to operate upon the
opposite part of the bar and thus complete the line (all around the section) of the
corresponding cutting-edges.
The movable shear operates across the section of the metal at an angle of traverse
of 45°, there or thereabouts.
According to a modification the movement of the movable shear may be effected
from a centre, or a movable centre, so as to have motion in a radial path during the
cutting traverse of the shear.
A very great saving of both material and labour is effected by this process and
means and sections of bars which hitherto have not been able to be cropped by a
shearing action can by these means be so manipulated.
As illustration-Given a tee iron, or H, iron bar say 20 feet long, to be cut up
into lengths of so many inches each. By my method I can obtain 20 lengths
of 12 inches each as against say 18 lengths of 12 inches each by the present means:-
That is to say, allowing for waste by slotting of 1 inch to each slot at a foot apart,
at the least, save 1 inch to the foot approximately of the bars cut up.
A bearing block is to be provided at the face side of the shear block to support the
free end of the bar whilst being cut.
:
In the drawings hereunto annexed there is illustrated a construction of apparatus.
according to this invention wherein; Figs. 1 to 4 are face views of shearing
apparatus according to this invention for cutting tee, bulb, H, and channel bars.
respectively.
Figs. 14 to 44 are face views of the stationary or bottom cutters of Figs. 1 to 4
respectively.
Figs. 1B to 4B are like views of the movable cutters of Figs. 1 to 4 respectively.
The Figs. 1 to 4 show the opening between the shearing edges of the shape or plan
of the section of the bar to be cropped.
A, are the top movable blocks of the press; B, the bottom blocks; C, straps
supporting the said top and bottom blocks; D the bottom cutters; and, E, the top
cutters.
The shearing edges of the cutters may be made removable and interchangeable
for use in the same machine for cutting different sections of bars as occasion may
require.
The operating of the movable block in the cropping operation will be effected, in
small constructions, by a lever press and in constructions of greater capacity the
power may be steam, as in a steam hammer, or by hydraulic power, as will be well
understood and be readily applied by a competent mechanic.

page_text: Having now particularly described and ascertained the nature and particulars of
my said Invention, I claim
First. In means for cutting or cropping metal bars of irregular sections, making
the shearing edges of the stationary and of the movable blocks with a cut away
portion or piercing or aperture which, when the opposing shearing edges are brought
opposite to each other, will together form cutting edges providing an aperture into
which the metal bars to be cut are to be inserted, and will thereby be supported,
whilst the cutting or cropping will proceed as and for the purpose herein set forth.
Secondly. The means for cutting or cropping metal bars constructed and operating
as and for the purpose herein set forth.
Dated 17th Janua1800
WM. JORDAN,
120, Chancery Lane, London, W.C., Agent for the Applicant.