Improvements in Bead Pieces or Devices for Use in Plaster or like Work.
Year: 1896

page_text: Date of Application, 23rd June, 1896-Accepted, 25th July, 1896
COMPLETE SPECIFICATION.
Improvements in Bead Pieces or Devices for Use in Plaster or
like Work.
I EDWARD BAXTER MARSH, of Lexington, in the County of Middlesex
and State of Massachusetts, United States of America, Manufacturer, 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:-
This invention has for its object to provide an improved corner bead for turning
corners in plastering.
Originally wooden beads provided with large rounded surfaces were employed,
the plastering being carried to these beads, the latter, however, forming or
constituting the corner.
A later developement relates to the metallic beads secured directly to the
studding or corner post and constituting also a part of the corner.
These are
variously sharp like a knife edge and rigid, or other shapes and not rigid, being
upheld by resting against the plastering. These fail to support the plaster
properly, either not furnishing any means whatever for receiving and retaining the
plaster as the plastering progresses, or else requiring a thinning out of the plaster
to such a degree adjacent the bead or plate as to render it liable to crack off and
crumble away..
My present invention comprehends a bead piece having a rounded periphery to
produce a rounded corner and which is supported in fixed position removed from
the corner post by a suitable holder or holders.
My invention also comprehends a bead piece provided in the direction of its
length with one or more recesses or depressions into which the plastering material
may flow and thereby obtain considerable thickness even at its extreme edge to
render it less liable to crack or chip off.
The above together with other features of my invention will be hereinafter
particularly described and pointed out in the claims at the end of this
specification.
The drawing,
Fig. 1 shows, in perspective, a sufficient portion of a building construction
including a bead piece embodying my invention to enable the latter to be
understood.
Fig. 2, a cross section of the part Fig. 1, and
Fig. 3, a perspective detail of one of the holders.
In the embodiment of my invention herein selected for illustration and shown
in the drawings, a is what I shall hereinafter denominate a bead piece, it being
shown as formed from a long rod provided in the present instance at its opposite
sides with long depressions or recesses a¹ to receive the plastering material.
To support the bead piece a in position I provide one or more preferably
a plurality, of holders b, herein shown as made from flat metal having one of
their ends slitted to leave the three ears b1, b2 and 63, two of which, for example
the ears 61 and 62, may be bent, as shown, to enter the depressions in the sides
of the bead piece and thereby embrace a portion of and to hold said bead piece, or
the latter may be otherwise supported from and by said holders or either of them
if desired.

page_text: When placing the bead piece in position I prefer to stagger the holders b,
that is, have the alternate holders extended in opposite directions to be secured
to different faces of the supporting stud or corner post S, as shown in Fig. 1,
although said holders may be arranged all at one face of the stud if desired.
In the present embodiment of my invention the ears are bent back to form
stops to engage the supporting stud and ensure proper positioning of the holders
and the bead carried thereby.
In use the lathes are laid in usual manner completely to the corner of the stud S
or as near the corner as may be desired, and the plaster p, of whatever material,
applied as heretofore, said plaster being extended to and finished smooth with the
outer surface of the bead piece to, form therewith a smooth finished corner, as
shown in Fig. 2.
It will be noticed that by reason of the depressions or recesses in the bead piece
and back of the corner surface thereof the plaster is given a substantial thickness
at its extreme edge where it meets the bead piece, these edges being shown at 2, 2,
Fig. 2, thereby giving the plaster a firm hold at the bead piece, and at the same
time, by reason of the greater thickness, at the edge, rendering the plaster not
liable to chip off.
For wire lathing the ears 61, 62, will be made shorter so that the bead will stand
out from the corner of the stud to a less distance than shown in the drawing, and
"it is evident that by varying the length of these ears or changing the contour or
position of the same, the position of the bead may be varied as desired.
It will be noticed that the outer surface 3 of the bead is rounded to produce a
rounded corner in the wall, and while this constitutes a feature of my invention,
the latter is not limited to any particular shape of outer surface at the corner.
My invention provides for the clinching of the plaster through and through
behind the bead and between the holders b, b, thus providing a firm corner, and
because the lathing can be extended quite to the corner at either face of the stud
the wall is further strengthened at the corner.
My invention is not limited to the particular embodiment herein shown for it is
evident the same may be varied without departing from the spirit and scope of the
invention.
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 :-
1. The use with a bead-piece provided with longitudinally extended plaster
receiving depresssions, of a plurality of independent holders, formed to engage
said bead piece at desired points in the length thereof and to hold said bead-piece
rigidly removed from the support to which said holders are attached, whereby the
plaster may be applied against, and flush with, the said bead-piece and be clinched
behind the same.
2. The herein described bead piece adapted to be supported at the corner in a
wall, the same being provided with one or more plaster receiving depressions,
whereby the said plaster may be maintained at substantial thickness to at or near
its line of juncture with said bead piece, and supports therefor having ears arranged
to enter said depressions and thereby maintain said bead piece in proper position.
3. The use with a bead piece, of one or more holders therefor provided with
ears embracing a portion of and to hold the said bead piece in position.
4. A bead piece, provided with longitudinally extended depressions, and a
plurality of independent holders having portions formed to enter said depressions
and thereby engage and hold said bead-piece in position clear of the support and
to be plastered against.
5. A metallic holder, provided at one end with holding portions formed in
opposition to each other, the other end thereof constituting a securing shank, and
a bead-piece having opposing angles formed to cooperate with said holding portions
and to be held thereby.

page_text: 6. The use with a bead piece, of holders for the same, and stop surfaces on and
to ensure correct positioning of the holders.
7. A metallic holder, having at one end holding portions formed in opposition
to each other, a securing shank, and a stop bent up, or otherwise formed, projecting
from said holder.
Dated the 23rd day of June 1896.
WM. BROOKES & SON,
55 & 56 Chancery Lane, London, Agents for the Applicant.