Improved Lathing.
Year: 1894

page_text: Date of Application, 9th Oct., 1894.
Complete Specification Left, 9th July, 1895-Accepted, 10th Aug., 1895
PROVISIONAL SPECIFICATION.
Improved Lathing.
I, EDWARD FREDERICK STIMSON, of 340 Brixton Road, in the County of
Surrey, Architect's. Articled Pupil, do hereby declare the nature of this invention
to be as follows:-
--
My invention has for its object lathing which may be quickly and easily secured
in position and a layer of mortar or plaster more quickly and firmly applied and
secured than is generally the case with the lathing now employed.
My improved lathing I form of sheets of papier mache or other material of a
similar nature, of convenient size and thickness and perforated with a number of
openings so arranged and' of such size and shape as found most convenient to suit
the nature of the mortar or plaster to be applied.
The thickness of each of these sheets is increased where the perforations occur,
by ridges projecting from the back or face thereof, whilst the edges of said
openings are so bevelled that when a layer of mortar or plaster is applied to the
surface of said sheet after it has been nailed or otherwise secured in position, part
of this will be forced into said openings and form a dovetail or other lock joint with
the edges thereof.
Dated this 9th day of October 1894
:
CASTLE SMITH,
"Invention" Office, 54 Fleet Street, London, E.C.,
Agent for the Applicant.
Improved Lawning.
I, EDWARD FREDERICK STIMSON, of 340 Brixton Road, in the County of
Surrey, Architect's Articled Pupil, 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 :-
My improved lathing is formed of sheets of papier mache or like fibrous material,
in which at suitable distances apart holes or recesses are provided. Around the
edges of the holes.or recesses the thickness is greater than in the other parts of the
sheet and the sides or edges of the holes or recesses are bevilled or dovetailed.
Hence when mortar or plaster is applied to the surface of the improved lathing it
enters the holes or recesses and spreads beneath the edges, consequently as soon as
has hardened the mortar or plaster will be found to be firmly and securely
attached.
In the drawings annexed
Figure 1 is a front view of a portion of a sheet of my improved lathing.
Figure 2 is a back view of the same.
Figure 3 is a section taken obliquely in the direction of the line A A in Figure 1.
In a portion of this figure the plaster is shown, as it is intended to be spread upon
the lathing.

page_text: Figure 4 is a vertical section in the direction of the line B B in Figure . In
this figure one of the uprights to which the lathing is fixed appears and the coating
of plaster is also represented.
I prepare the improved lathing from a dough like mixture of fibrous materials
preferably wood fibre with sufficient mineral matter to give the requisite rigidity.
The following proportions. are.suitable :-
ems ugure one of the uprights to which the lathing is fixed appears and the coating
of plaster is also represented.
prepare the improved lathing from a dough like mixture of fibrous materials
preferably wood fibre with sufficient mineral matter to give the requisite rigidity.
The following proportions.are.suitable :―
Strong fibre prepared from wood by chemical means
and known commercially as "chemical wood
pulp or fibre
"
30 parts.
Disintegrated wood prepared by grinding and known
mechanical wood pulp or 30 parts.
commercially as
ground wood pulp"
Asbestos in the form known commercially as
1
"asbestive pulp
Plaster of Paris
"
25 parts.
15. parts.
[.
The materials are, thoroughly mixed to form a stiff dough and this is then
moulded into sheets, to the form shown by the drawings, by pressure either between
two suitably formed blocks or by passing the dough between rollers; or the dough
may be spread upon a block, corresponding in form to one of the faces of the sheet,
by means of a roller with suitable, projections upon it to fashion the other side of
the sheet.
PAX
The sheets of improved lathing moulded in the manner described are to be
thoroughly dried with suitable precautions to prevent them warping; they are then
ready for use.
The holes or recesses in the improved lathing may be of any convenient form,
square holes a a are indicated in the drawings and this form is convenient. At a¹ a¹
the thickening around the edges of the holes is represented, this thickening affords
a deep cavity to receive the mortar or plaster whilst the rest of the sheet is
comparatively thin. bare nail holes provided in the sheet at short distances
apart, but in fixing the improved lathing many of these nail holes are left vacant
and when the mortar or plaster is spread it enters them and so they aid to some
extent in affording a firm attachment. With a like object provide shallow
grooves.cc upon the face which receives the mortar or plaster.
It is not essential that the holes a a should penetrate entirely through the sheet,
they may be closed at the bottom, the sheet of improved lathing then being
smooth at the back. Or the sheets may he backed so as to form closed recesses;
it is preferred however that the mortar or plaster should be left free to extend.
through the holes as the drawings indicate.
My improved lathing requires much less plaster to be spread than is requisite
when wooden laths are used; it occupies less space and it is light damp proof and
fire proof.
"
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what i
claim is: ==
;
My improved lathing consisting of sheets of papier maché or like fibrous
material formed with holes or recesses thickened around the edges and bevelled
or dovetailed to permit the mortar or plaster to spread after entering the hole
or recesB.
Dated 1
T