Year: 1898

page_text: Date of Application, 17th May, 1898
Complete Specification Left, 10th Nov., 1898-Accepted, 10th Dec., 1898
I, ADAM ADAMS, of St. Michael's House, Old Fletton, Peterborough, in the
County of Northampton, Brick Works Manager, do hereby declare the nature of
this invention:-
The invention consists of an improved screen or sieve so made that the vibra-
tion set up by the material passing over the wires keeps the screen clear without
the aid of brushes or other mechanical contrivances to shake or rotate the screen,
or steam heated pipes to heat the screen.
In carrying my invention into effect I employ a frame of any shape and
dimensions to suit the materials to be screened, but I form it preferably rect-
angular and I have found the proportions of 4 feet by 20 inches outside measure-
ment to answer well.
I construct this frame of such strength that its two ends shall be of similar
character and strength to a piano forte wrest plank. In these ends steel pins are
fastened at suitable distances from each other to suit any degree of fineness that
may be required.
Steel piano wire of suitable gauge is stretched on these pins and tightened up
with a key or wrench to a suitable tension in a similar manner to pianoforte
wires.
A screen thus constructed is extremely simple in construction, is a fixture, clogs
less than other screens and requires very little attention.
HARRIS & MILLS,
23, Southampton Buildings, London, W.C., Agents.
I, ADAM ADAMS, of St. Michael's House, Old Fletton, Peterborough, in the
County of Huntingdon, Brick Works Manager, 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:-
The invention consists of an improved screen or sieve, so made that the vibra-
tion, set up by the material passing over the wires, keeps the screen clear without

page_text: the aid of brushes or other mechanical contrivances to shake or rotate the screen,
or steam heated pipes to heat the screen.
In carrying my invention into effect employ a frame of any shape and
dimensions to suit the material to be screened; but I form it preferably rect-
angular.
I construct this frame of such strength that its two ends shall be of similar
character and strength to a piano-forte wrest plank and hitch pin plate or plank.
In these ends pins are fastened at suitable distances from each other to obtain
any degree of fineness of material required. Steel wire, preferably piano wire
of suitable gauge is stretched on these pins and tightened up with a key or wrench
to the required tension in a similar manner to piano-forte wires.
The tension can also be applied to the wires by any other convenient means.
This screen is extremely simple in construction, is a fixture, clogs less than
other screens, requires little attention and is very easily and quickly repaired.
My invention is represented in the accompanying drawings in which Fig. 1 is
a plan view of the frame of a screen, with its hitch pins and wrest pins but with-
out the wires; Fig. 2 is a plan of the same, drawn to a larger scale, but having
some parts broken away and showing some of the wires.
Fig. 3 is a longitudinal elevation and semi-section and Fig. 4 is an end view
of Fig. 2.
Fig. 5 is a longitudinal section and Fig. 6 is a plan of one end of a screen show-
ing a slight modification.
Similar letters of reference indicate like parts throughout the drawings.
a a represent the side bars of the screen.
6 the hitch pin plank or plate, and c the wrest plank, forming the ends of the
screen frame, 1 the hitch pins, c¹ the wrest pins, d the wires.
The wires are hitched over or attached to the hitch pins 61, they then pass
over the upper edge or bridge 2 of the hitch pin plank or plate to the other end
of the screen frame where they pass over the upper edge or bridge of the wrest
plank c down to the wrest pins c¹ to which they are secured in the known manner
and by which, aided by a suitable key, they may be tightened to the required
degree of tension. e is a central cross-bar, which serves to stiffen the framework
of the screen and also protects the wires from breakage in case they are at any
time subject to any accidental blow. This bar does not touch the wires, while
the screen is in ordinary use and so the vibration is not affected.
In the modification shown in Figures 5 and 6 the wrest and hitch pin planks
Instead of being fixed at right angles to the side bars are in a plane parallel
therewith as shown with respect to the wrest plank.
In this latter arrangement the hitch pin plank or plate and the wrest plank
and pins are covered with a removable board or metal plate f as shown by dotted
lines.
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. A screen or sieve consisting in the combination of a strong frame, one end
of which forms a hitch pin plank or plate, and the other a wrest plank, hitch pins
and wrest pins mounted in said ends or planks, bridge pieces at each end of the
frame and wires attached to the hitch pins and wrest pins and capable of being
tightened, substantially as herein set forth.
2. In a screen or sieve the combination of a hitch pin plank or plate, a wrest
plank, hitch pins, wrest pins and wires attached to such hitch pins and wrest
pins and capable of being tightened, substantially as herein set forth.
3. In a screen or sieve the combination of a frame, a hitch pin plank or plate,
a wrest plank, hitch pins, wrest pins, bridges and wires, substantially as herein
set forth.
4. In a screen or sieve, the combination of a frame, a hitch pin plank cr plate,

page_text: a wrest plank, hitch pins and wrest pins and wires attached to and stretched
between said pins, substantially as herein set forth.
5. In a screen or sieve, the combination of bridge pieces and stretched wires,
capable of vibration, substantially as described in the accompanying specification.
Dated this 10th day of November 1898.
HARRIS & MILLS,
23, Southampton Buildings, London, W.C, Agents.
HARRIS & MILLS,
23, Southampton Buildings, London, W.C, Agents.