Improvements in Apparatus for Cutting, Mitreing, and Cramping up Mitres of Mouldings.
Year: 1886

page_text: Date of Application, 6th May, 1886.
Complete Left, 30th Dec., 1886.
Complete Accepted, 29th Mar., 1887.
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Cutting, Mitreing, and
Cramping up Mitres of Mouldings.
I, WILLIAM PRINGLE of 12 Albert Road, Spittal, within the County of the Borough
and Town of Berwick upon Tweed Joiner do hereby declare the nature of this
invention to be as follows:-
:―
In the above mentioned Invention mouldings of every description can be cut to
lengths and mitred with a tenon Saw working between two brass or steel guide plates,
and cramped up with spring cramp. The Invention is on a Castiron Stand partly
covered with wood to protect saw from Iron, and on which mouldings are laid when
using Size 20 in. x 14 in. at extreme points. There are two Wood Blocks, with square
cuts, by which mouldings are cut to lengths. There is also a catch which is raised by
the pressure of the finger, to keep short mouldings square with said blocks. The saw
in cutting mitres is guided by Steel or Brass Plates, which may be raised for very
thick mouldings. Mitres may be altered by screws. Prongs of Spring Cramp (with
ends turned up to catch check of mouldings) holding 2 mouldings until saw is cut
through mitre. The prongs yiold inward when screwed up thus closing & keeping
mitre quite firm until nailed. All the cramp, excepting the turned up ends of Prongs,
works in iron space under the wood cover-There is ample space at mitre for nailing
mouldings. The Invention can be used upon a Bench or Table.

page_text: COMPLETE SPECIFICATION.
Improvements in Apparatus for Cutting, Mitreing, and
Cramping up Mitres of Mouldings.
-I, WILLIAM PRINGLE of 12 Albert Road Spittal, within the County of the Borough
and Town of Berwick upon Tweed, Joiner do hereby declare the nature of my
invention for "IMPROVEMENTS IN APPARATUS FOR CUTTING, MITREING, AND CRAMPING
UP MITRES OF MOULDINGS "and in what, manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
The body or stand of the invention is a right angle triangle of cast iron, with
provision at square corner, on which are fit iron or steel guide plates A for guiding
saw when cutting and mitreing mouldings; these guide plates can be lowered or
raised, opened or closed to suit saws and mouldings of different sizes. On right
angles of stand are upright catches or stops B against which mouldings are placed
when being cut, mitred or cramped. The stops nearest guide plates are placed at
right angles therewith for placing mouldings against when being cut to lengths.
A support C the top of which is level with top of stand, projects from each side in a
line with stops nearest guide plates, to lay mouldings upon when being cut to lengths.
These supports fold beneath the stand when not in use. On each stop next the front
of stand is a plate, D, moved by screws, for altering mitre. There is a spring
cramp, E, with two prongs turned up at the ends, projecting above the stand, to catch
the rabbet of mouldings. The prongs yield inward when the cramp is tightened by
screw, thereby closing the mitre and keeping it firm until nailed. The handle of
cramp screw, G, falls clear of any frame. The cramp and screw, excepting the turned
up ends of prongs, work between wood plate, F, for protecting saw, and the iron
stand, from the centre of the front of stand to the mitre or guide plates.
Fig. 1, in the accompanying Drawings, shows the apparatus complete, with the
supports, C, in position for laying mouldings across when being cut to lengths.
Fig. 2 is the head of the apparatus, with one of the upper guide plates, A,
removed, shewing fittings, and the manner in which the guide plates are fixed to metal
uprights, H; and also shewing how they are moved, by screws from the outside, to
suit different saws. The two uprights, H, are'opposite each other, with space between,
through which saws work.. They narrow to the centre at top, through which is a hole
to receive a bolt. A spring-plate, I, edge up, passes along the inside and level with
the top of upright, H, having each end bent round to a line with the outside of the
upright. On the outside, and also level with the top of upright, H, is a stout straight
plate J, with a screw in each end to screw against the ends of spring plate I. These
plates, I and J, are kept together, the upright, H, between them, by means of a bolt
through the hole in top of upright and a hole in centre of the plates. The guide-
plates, A, are fixed, one on the upper edge and one on the under edge of spring plate I,
with a bolt up through the guide plates A and inside the circled ends of the spring-
plate I. The guide plates, A, being fixed to the spring-plate I inside of upright H,

page_text: and the screws in plate J on the outside, pressing against the spring plate I, closes or
opens the space for saw. The plates A, I, and J are raised or lowered, working on
the centre bolt K through the hole in the top of upright H. A piece of wood, L, is
fixed to the inside of each upright H, with the end cut in a line with catches or
stops B on right angles of stand, to protect the outer point of mitre when being
cramped.
Fig. 3 is a detail drawing illustrating the spring cramp E. The cramp is worked
in a sunken part of the stand by the handle G, the nut M fitting into a slot behind
the ledge of stand. The wood plate F covers the nut screw and centre of cramp, the
turned up ends of cramp alone standing above the level of stand to catch the rabbot
of mouldings. The cramp E is kept in position by the plate N fitting into the
groove, O, in the outer edge of cramp, and fixed to the cast iron stand.
In using the invention, mouldings are first laid across the top of stand and supports,
against the two stops nearest guide-plates, and cut to lengths with any saw. Mouldings
are next placed against the stops on right angles of stand, and mitres cut with same
Mitres are cramped with the mouldings in the same position. After tightening
the cramp, should the mitre not be perfect, the saw is again cut through the mitre,
thus making it true and close, which is then finally cramped up and secured.
saw.
Having now particularly described and ascertained the nature of my said Invention,
and in what manner the same is to be performed, I declare that what I claim is :-
1. That mouldings of every description can be cut to lengths, mitred, and cramped
without any foreign aid other than a saw.
2. The prongs of cramp, E, yielding inward when tightened, close the mitre easier
than an ordinary one, and enables a truer mitre to be made.
3. The Guide plates A for saws, being adjustable, are thus suitable for saws and
mouldings of different sizes.
Dated this Twenty ninth day of December 1886
EDWD. F. HERDMAN,
Agent for the Applicant.