Improvements in Adjustable Guides and Stops for use in Shaping Boiler, Ship, and other Plates.
Year: 1890

page_text: Date of Application, 9th Apr., 1890-Accepted, 24th May, 1890
COMPLETE SPECIFICATION.
Improvements in Adjustable Guides and Stops for use in Shaping
Boiler, Ship, and other Plates.
I, WILLIAM OCKENDON, of 298 Barnsley Road, Sheffield, in the County of York,
Mechanical Engineer, 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 :-
In shaping channelled flat or corrugated plates ready for welding it has hitherto
been impossible to shear them to the required form and to give their edges the
necessary angle as is done with flat plates, and consequently the preparation of the
edges has had to be effected by the planing or slotting machine, which a costly and
tedious method.
Now the object of my invention is the production of adjustable guides and their
application to channelled, corrugated and flat plates, to enable the plates to be sheared
to the required form and to have their edges dressed by the same means to the
necessary angle. If the latter operation be effected by light cuts of the shears a good
edge may be given to the plate without much burring or fraying.
The accompanying sheet of drawings shews adjustable guides and stops according
to this invention for use in shaping boiler, ship, and other plates of the kind
referred to.
Fig. 1 is a plan of a channelled plate intended for the cylindrical furnace of a steam
boiler, and fitted with adjustable guides and stops.
Fig. 2 is a sectional elevation of Fig. 1.
Fig. 3 an end elevation of Fig. 1 partly in section.
Fig. 4 is an end elevation partly in section shewing the temporary stop C and
plate A between shear blades I ready for removing the scrap J and for straightening
the plate by same operation if required.
Fig. 5 is an elevation similar to Fig. 4 but with the temporary stop removed and
the plate under operation inclined to the guide B for finishing the edge preparatory
to welding.
A is a channelled plate intended for the cylindrical furnace of a steam boiler.
A' A' are lines marked on the plate for adjusting the position of the guides B and
stops C. These latter are bars bent to a right angle; each bar is provided with a
snug or hook at one end taking in a hole in the guide B, and with flanges or cheeks
at the other end to clip the guide. An eye bolt D is screwed to the upper part of the
stop to facilitate the handling of it. The guide B is a bar of iron bent into such a
form as to be readily secured to the cross bar F by any suitable means, such as bolts
or set screws. At its lower part it rests on a packing piece or plate under operation.
Its outer face is made at the proper angle, for shearing, grinding or sawing. The
guides are secured to the cross-bar F which is placed on the plate A with the stops
up to the respective lines and it is then secured by the screw cramps G. The outer of
the two lines, that to which stops are adjusted marks the limit to which the plate is
first to be roughly cut, and the inner line, that to which the guides are adjusted,
marks where the finishing cut is to end. The guide is made to such an angle
that when the tool is guided by it, the plate will be cut to the required angle for
welding.
The plate is now ready for the crane, the chains H of which are secured as near
the centre of gravity as possible for easy manipulation during shearing, grinding
or sawing. Or the plate to be operated upon can be placed on a movable table
constructed to impart to it longitudinal travel and to hold it at the required angle of
out. The table may rest on a frame provided with wheels for carrying the plate and
able from place to place.

page_text: The edge of the plate is first sheared away at one cut or by successive cuts, until
the shear plate comes up to the stops. The stops are then taken off, and the finishing
cut is taken, the plate being tilted to the required angle until the edge of the guide is
in the plane of the tool.
Instead of the stops being mounted in the guides they may be fixed to a separate
bar, and removed entirely, or the bar carrying the stops may be removed and be
replaced by that carrying the guides.
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
1. The use in shearing, grinding, or sawing plates of channelled flat corrugated or
similar forms of adjustable stops which can be set to regulate the cut of the tool
substantially as described.
2. In shearing, grinding or sawing plates of channelled flat corrugated or similar
form the combination of a bar such as F, which can be clamped to the plate with
guides or stops, or both substantially as described:
3. The adjustable guide and stop for use in shearing, grinding or sawing plates of
channelled, flat corrugated or similar form constructed, arranged and operated sub-
stantially as described with reference to the drawings.
T: 01
0
11000
W. OCKENDON,
Per L. W.