Improvements in Machines for Scarfing the Edges of Metal Plates.
Year: 1894

page_text: Date of Application, 11th Sept., 1894
.Complete Specification Left, 11th June, 1895-Accepted, 3rd Aug.,
1895
Improvements in Machines for Scarfing the Edges of Metal Plates.
HUGH SMITH Senr., HUGH SMITH Junr., and OSBOURNE SMITH, Engineers,
Possil Engine Works, Glasgow, in the County of Lanarkshire, do hereby declare
the nature of this invention to be as follows:-
Our invention relates to improvements in machines for scarfing the edges of steel,
iron, or other metal plates, as used in shipbuilding or other structural steel or iron
work.
Our invention consists in the application of certain parts, and in order that
our invention may be more fully understood, we hereunto append drawings,
Figs. 1 and 2, Sheet 1, being, respectively, an elevation and plan of a scarfing
machine.
On Sheet 1, Figs. 1 and 2,-S. S' represent two saddles fitted to slide on a
bed M, and K. K₁ represent two tool slides fitted to slide on the aforesaid
saddles S. S¹, and carrying the necessary tools for cutting the scarf off the plate.
The aforesaid tool slides K. K' are driven back and forward by means of the con-
necting rods H. H¹ which are driven by pins on the discs G. G¹, which are in turn
driven by the spur wheels F. F and E. E¹, the said spur wheels E. E' being fitted
to slide on shaft C, by which they are driven, through clutches D. D' and said
shaft C is driven by means of spur gearing BB and cone pulley A for driving belt.
P. P represent the position of two plates placed on two tables, or on one long
table. R represents a screw running in bearings, one at each end of the bed M,
and working in two nuts attached to the saddles S. S' in such a manner that when
the said screw R revolves, the saddles S. S¹ travel on the bed M. The screw may
be driven either by pullies N, or by pullies and gearing, or by gearing from shaft C
or other mechanical means.
Our invention consists, in the first place, in the arrangement of the clutches D. DI
on the shaft C, for the purpose of stopping from working any one of the tool
slides K. K' while the other continues to work, and in the arrangement of the
aforesaid clutches D. D' so that they will only enter into gear in one position, and
that position is such that when any one of the aforesaid tool slides K. K' is on the
cutting or forward stroke the other is on the backward or return stroke, for the
purpose of reducing the power required for working the two tools of the machine.
Our invention consists, in the second place, in the combination of parts, con-
sisting of a long table, or two tables, T. T¹, for the purpose of carrying two
plates P., and of driving the screw R by means of pullies N, or other mechanical
means, for the purpose of rapidly travelling the aforesaid two saddles S. Son
bed M from opposite one plate P to opposite the other plate P¹, so that while the
one plate P is being scarfed the other plate P is being set on table T: and again
when plate P is being scarfed, plate P¹ is being fixed on table T¹.
Dated 10th day of September 1894.
HUGH SMITH, SENR.
HUGH SMITH, JUNR.
OSBOURNE SMITH.

page_text: Improvements in machines for Scarfing the Edges of Metal Plates..
HUGH SMITH, HUGH SMITH. Junr., and OSBOURNE SMITH, Engineers, Possil
Engine Works, Glasgow, in the County of Lanarkshire, 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 :-
Our invention relates to improvements in machines for scarfing the edges of
steel, iron, or other metal plates, as used in shipbuilding or other structural steel or
iron work.
1
Our invention consists in the application of, certain parts, and in order that our
invention may be more fully understood, we have left with the Provisional
Specification, drawings. Figs. 1 and 2, Sheet 1, being, respectively, an elevation and
plan of a scarfing machine.
On Sheet 1, Figs. 1 and 2,-S, S' represent two saddles fitted to slide on a bed M,
and K, K represent two tool slides fitted; to slide on the aforesaid saddles S, S',
and carrying the necessary tools for cutting the. scarf off the plate. The aforesaid
tool slides K-K are driven back and forward by means of the connecting
rods H-H' which are driven by pins on the discs G-G', which are in turn driven
by: the spur wheels F-F and EE', the said spur wheels E-E' being fitted to
slide on shaft C by which they are driven through clutches D-D₁, and said shaft C
is driven by means of spur gearing B-B and cone pulley, A for, driving belt.
PP represent the position of two plates placed on two tables, or on one long
table. Rrepresents a screw running in bearings, one at each end of the bed M,
and working in two nuts attached to the saddles S--Sin such a manner that when
the said scrow R revolves, the saddles S-S"travel on the bed M. The screw may
be driven either by pullies N, or by pullies and gearing, or by gearing from shaft C
or other mechanical means.
Our invention consists, in the first place, in the arrangement of the clutches D-DI
on the shaft C, for the purpose of stopping from working any one of the tool
slides K-K while the other continues to work, and; in the arrangement of the
aforesaid clutches D-D so that they will only enter into gear in one position, and
that position is such that when any one of the aforesaid tool slides K-K' is on the
cutting or forward stroke the other is on the backward or, return stroke, for the
purpose of reducing the power required for working, the two tools of the machine.
The aforesaid clutches D-D' are made with two or more teeth or paws,, the said
teeth or paws being made of different sizes, and the long bosses on spur wheels E
and E have recesses of corresponding sizes to the aforesaid teeth or paws on
clutches D-D', so that the clutches will only enter at one position, namely, when
the teeth or paws are opposite to their corresponding recesses; the 'spur wheels E
and E being loose on the shaft while the clutches D Dare, driven by the shaft,
and slide on feather keys.
Our invention consists, in the second place, in the combination of parts, consisting
of a long table, or two tables T-T, for the purpose of carrying two plates P-P,
and of driving the screw R by means of pullies N or other mechanical means, for
the purpose of rapidly travelling the aforesaid two saddles S-S on bed, M from
opposite one plate P to opposite the other plate Pl, so that while the one plate P¹
is being scarfed, the other plate P is being set on table T.: and again, when. plate P
is being scarfed, plate Pis being fixed on table T'.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is
1
1st. The arrangement of alutabas
1
1

page_text: 2nd. The combination of parts, consisting of one long table, or two tables, for
the purpose of carrying two plates, in the manner all as hereinbefore described.
Dated this 10th day of June 1895.
HUGH SMITH.
HUGH SMITH, JUNR.
OSBOURNE SMITH.