Improvements in Suction Discs as Used in Dental Practice.
Year: 1888

page_text: Date of Application, 14th Dec., 1888
Complete Specification Left, 10th May, 1889-Accepted, 29th June, 1889
PROVISIONAL SPECIFICATION.
Improvements in Suction Discs as Used in Dental Practice.
I, SAMUEL LORD of No. 3 Richmond Terrace Blackburn in the County of
Lancaster, Dentist, do hereby declare the nature of this invention to be as
follows:-
This invention relates to the suction discs employed in dentistry and which here-
tofore have been constructed or made from sheet india rubber by punching out such
discs, the outer edges of which consequently were angular or square and liable to
cause irritation of the palate.
According to this my said invention I mould the discs separately, the moulds being
50 constructed that the outer edge of the disc is tapered off or brought to a feathered
edge so as to ensure great flexibility, adhesion, and adaptation to any irregularities on
the surface of the palate with freedom from irritation.
A concentric ring around the centre of the disc is of additional thickness or in relief
from the body of the disc, the interior of which ring forms a receptacle and bed for
the "washer" employed for attaching the disc.
In some cases the discs may be backed or lined by an unelastic fabric such as linen
so as to prevent the discs stretching.
Dated this 13th day of December 1888
WALTER BRIERLEY,
Town Hall Buildings, Halifax, Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Suction Discs as Used in Dental Practice.
I, SAMUEL LORD of No. 3 Richmond Terrace, Blackburn in the County of
Lancaster, Dentist, 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 relates to the suction discs employed in dentistry, and which here-
tofore have been constructed, or made from sheet india rubber by punching out such
discs, the outer edges of which, consequently were angular, and liable to cause
irritation to the palate.
According to this my invention I mould the discs separately, the moulds being so
constructed that the outer edge of the disc is tapered off so as to adapt itself to any
irregularities of the palate without causing irritation thereto.
I form a concentric ring round the centre of the underside of the disc which when
depressed from the top side receives the "washer" employed for attaching the
disc.
Such being the nature and object of the said invention the following is a complete
description of same reference being had to the accompanying drawings in which :
Fig. 1 is a plan view of my improved suction disc.
Fig. 2 is a section of fig. 1 both figs. being drawn on an enlarged scale.
Fig. 3 shews the suction disc, washer, &c. in position they being full size.
The remaining figs. shew the disc, washer, and pin drawn about full size.
According to this my said invention I mould the disc 1, separately, the moulds being
so constructed that the outer edge 2 of the disc 1 is tapered off, or brought to a
feathered edge so as to ensure great flexibility, adhesion, and adaptation to any
irregularities or corrugations on the surface of the palate 3, with consequent freedom
from irritation.

page_text: A concentric ring 4 around the centre 5 and on the underside of the disc 1 is of
additional thickness, or in relief from the body of the disc 1. The interior 6 of which
ring 4 when pressed from the opposite or top side forms a cup or receptacle, and bed
for the "washer" 7 employed for attaching the disc 1 to the artificial palate 8.
In some cases the disc I may be lined or have embedded in its centre any non-
elastic fabric 9 such as linen, the embedded fabric being less in diameter than the
disc 1, which fabric prevents the discs from stretching.
I would have it understood that I do not limit myself to the exact shape or outline
of disc referred to and shown, as it is obvious the same can be varied without departing
from the invention.
Having now particularly described and ascertained the nature of this my said
Invention and in what manner the same is to be performed I declare that what I
claim is :-
1. Moulded discs for purpose aforesaid and substantially as herein described and
illustrated by the annexed drawings.
2. The feathered or tapered edged disc having the concentric ring with or without
the embedded disc of non-elastic material as and for purpose herein described and
illustrated by annexed drawings.
1000
A
1000
поот Сеп 10 fростта полит
SAMUEL LORD.
By his Agent, Walter Brierley,
Town Hall Buildidgs, Halifax.