IMPROVEMENTS ofer, for the Invention of MANUFACTURE OF SKELPS AND TUBES
Year: 1876

page_text: LETTERS PATENT to Charles Frederick Griminett, of Edgbaston, in the County
"IMPROVEMENTS
of Warwick, Engineer, for the Invention of
MANUFACTURE OF SKELPS AND TUBES."
IN
THE
ed the 13th March 1877, and dated the 19th September 1876
PROVISIONAL SPECIFICATION left by the said Charles Frederick Grimmett
at the Office of the Commissioners of Patents on the 19th September 1876.
CHARLES FREDERICK GRIMMETT, of Edgbaston, in the County of Warwick,
Engineer. "IMPROVEMENTS IN THE MANUFACTURE OF SKELPS AND TUBES."
My Invention refers chiefly to the manufacture of skelps and tubes employed by
jewellers, hinge makers, and other similar artificers, though it may also be employed
for tubes of a heavier character. It consists in forming a skelp by either rolling or
drawing, or by both operations, of such form that when the completed tube is
made it is solidly attached to a flange or plate, being in fact made in one pieco
with such flange or plate.
The skelp may be either of a T section, two arms of which may be brought
together to form a tube, the third forming the flange, or the tube may be formed of
the upright arm, and thus placed midway on the plate or flanges, or the skelp being
a plain flat section may be doubled in the direction of its length, and one of the
halves again returned and formed into a tube, which will thus produce a tube and
stop, or the bending half of the skelp may be returned inwards, and thus form a
flanged tube without a stop, or the skelp may have a rib or short flange formed in
any part of its width, and the part of the skelp above such rib may be turned
round into a tube when the rib will form the stop, or a plate with three tubes or
bends may be made by turning up the flange, and also the edges of the plate into
tubes.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Charles Frederick Grimmett in the Great Seal Patent Office on the
17th March 1877.
CHARLES FREDERICK GRIMMETT, of Edgbaston, in the County of Warwick,
Engineer. "IMPROVEMENTS IN THE MANUFACTURE OF SKELPS AND TUBES."

page_text: My Inventions refers chiefly to the manufacture of skelps and tubes employed by
jewellers, hinge makers, silversmiths, and other similar artificers, though it may
also be employed for tubes of a heavier character. It consists in forming a skelp
by either rolling or drawing, or by both operations, of such form that when the
completed tube is made it is solidly attached to one or inore flanges or plates, being
in fact made in one piece therewith.
I will now proceed to describe my Invention more fully in detail by aid of the
accompanying Drawings, reference being had to the letters and figures marked
thereon.
The skelp may be either of a T section as at A, Figure 1, two arms of which.
such as (a and b), or (6 and c), or (c and a), may be brought together, as shewn by
B, Figure 1, or N, Figure 1, to form a tube, the third arm forming the flange, or
the tube may be formed of the upright arm (b), as shown by C, Figure I, and thus
placed midway on the plates or flanges, or the skelp being of a plain flat section D,
Figure 2, may be doubled in the direction of its length, and one of the halves
again returned and formed into a tube as E, Figure 2, and will thus produce a tube
and flange with a stop (d), or the half of the skelp may be returned inwards as
at F, Figure 2, and thus form a flanged tube without a stop; or the skelp may
have a rib or short flange as at G, Figure 3, formed on any part of its width, and
the part of the skelp beyond such rib may be turned round into a tube as at H,
Figure 3, and the rib will form the stop; or the flat skelp I, Figure 4, may be
pressed or drawn of a tubular shape as at J, Figure 4, or both ends (e) may be
doubled inwards to form three tubes K, Figure 4, or each arm of the T shape
section, Figure 5, may be turned in, as shewn at M, Figure 5, to produce a similar
form to K, Figure 4.
Having thus described the object and nature of my said Invention, and the
manner in which the same is to be carried into effect, I claim, the several improve-
ments in the manufacture of skelps and tubes of the descriptions herein shewn by
forming such skelps or tubes ribbed or flanged of a single piece of metal without
soldering or brazing, substantially as herein more fully set forth and specified.
In witness whereof, I, the said Charles Frederick Grimmett, have hereunto set
my hand and seal, this Sixteenth day of March, in the year of our Lord
One thousand eight hundred and seventy-seven.
CHARLES FREDERICK GRIMMETT. (LS.)