Year: 1887

page_text: Date of Application, 25th Mar., 1887
Complete Left, 27th Dec., 1887
Complete Accepted, 23rd Mar., 1888
I, CHARLES FREDERICK RUTTERFORD of 11 Poland Street in the county of
Middlesex, Dentist and Dental Material Manufacturer, do hereby declare the nature
of this Invention to be as follows:-
My invention relates to improvements in apparatus employed for vulcanizing Indian
rubber or other material, such as the Indian rubber plates of artificial tech.
Vulcanizers, as ordinarily constructed, consist chiefly of a strong vertical cylindrical
vessel closed at the bottom and having the top covered by a hemispherical or other
suitably shaped lid, which is forced down into close contact with the edge of the
aforesaid vessel by means of a screw or screws working in an arched cross-bar or sling,
either suitably hinged to, or capable of removal from the apparatus.
A steam-tight joint is formed by means of a lead ring, or other suitable material,
embedded in or affixded to the edge of the lid.
The disadvantages of this arrangement are, that when the vessel is opened to remove
the vulcanized articles, the cover not being attached in any way to the apparatus and
being very hot, is generally thrown hastily down, with the effect that the aforesaid
lead, or other ring, becomes injured, and that grit or dirt adhere to it, so that it
becomes difficult to preserve a steam-tight joint with the vessel.
According to my invention, I pivot the lower end of the aforesaid screw in the top
of the lid, so that when the hinged cross-bar is turned back the lid is lifted up with it
and not detached from the apparatus and the lead joint is therefore preserved intact.
To insure the said lid always seating in the same position and to prevent it turning
with the screw, I provide small lugs or projections on the inner sides of the ends of
the cross-bar, which enter corresponding notches in the edge of the lid.
I do not necessarily confine myself to using a cross-bar hinged to the vessel, as I
may employ a detachable cross-bar, but in practice I prefer the former method, which
I consider ensures the maximum security for the lid joint.
It is obvious that apparatus constructed according to my invention may be employed
for vulcanizing articles other than those connected with the manufacture of artificial
teeth.
AMBROSE MYALL,
21, Cockspur Street, S. W.,
Agent for the Applicant.

page_text: Improvements in Vulcanizers for Dental and other Purposes.
I, CHARLES FREDERICK RUTTERFORD of 11 Poland Street, in the county of
Middlesex, Dentist and Dental Material 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 :-
My invention relates to improvements in apparatus employed for vulcanizing Indian-
rubber, or other material, such as Indian-rubber plates of artificial teeth.
Vulcanizers, as ordinarily constructed, consist chiefly of a strong vertical cylindrical
vessel, closed at the bottom, and having the top covered by a hemispherical, or other
suitably shaped lid, which is forced down into close contact with the edge of the
aforesaid vessel by means of a screw or screws working in an arched cross-bar or
sling, either suitably hinged to it, or capable of removal from the apparatus.
A steam-tight joint is formed by means of a load ring, or other suitable material,
embedded in or affixed to the edge of the lid.
The disadvantages of this arrangement are, that when the vessel is opened to remove
the vulcanized articles, the cover not being attached in any way to the apparatus and
being very hot, is generally thrown hastily down, with the effect that the aforesaid lead
or other ring becomes injured, and that grit or dirt adhere to it, so that it is difficult
to preserve a steam-tight joint with the vessel.
In the accompanying two sheets of drawings Figures 1 and 2 are perspective
elevations of a vulcanizer of the ordinary form as above described, but constructed
with the improvements which constitute the subject of my invention.
Figure 1 represents the vulcanizer with the lid closed and Figure 2 with the
d open.
Similar parts are denoted by similar letters in both figures.
A is the outer casing of the apparatus, B is a strong cylindrical vessel forming the
vulcanizer proper, suspended within the casing A by means of the collar C, which is
rivetted or otherwise securely attached to B. That part of B which is within the
casing A is indicated by dotted lines. D is a gas burner for heating the vulcanizer.
E is the lid which is forced down into close contact with the edge of B by means of
the screw F and lever H, working in the arched cross-bar J, which is hinged at one
end between the lugs K, K¹, on the collar C, and temporarily secured at the other end
by a pin L passing through holes in the said end and in the lugs M, M', on the aforesaid
collar.
A ring of lead or other suitable material is embedded in the edge E' (Figure 2) of
the lid E, in order to make a steam-tight joint with the edge of the vulcanizer B.
In the ordinary construction, as before described, the lid is not attached in any way
to the apparatus, but according to my invention 1 pivot it to the lower end of the
screw F, as clearly shown by the section at N Figure 1, so that when the hinged
cross-bar J is turned back the lid is lifted up with it, as shewn in Figure 2, and not
detached from the apparatus, and the lead joint at E¹ is therefore preserved intact. To
insure the lid always seating in the same position and to prevent it turning with the

page_text: screw F, I provide small lugs or feathers P, P', on the inner sides of the ends of the
cross-bar, which enter corresponding notches in the edge of the lid.
Qis a temperature and pressure regulator and indicator connected to the apparatus.
I do not necessarily confine myself to using a cross-bar hinged to the vessel, as I
may employ a detachable cross-bar, but in practice I prefer the former method which
I consider ensures the maximum security for the lid joint. In place of the central
screw FI may provide a suitably arranged screw or cam to connect the end of the
cross bar to the lugs M M¹ and force down the lid, and in this case I form a suitable
projection on the centre of the cross-bar to which the lid E is pivotted or connected.
Such connection necessarily not being of a rigid character, in order that the lid may
may fit properly on its scat.
It is obvious that apparatus constructed according to my invention may be
employed for vulcanizing articles other than those connected with the manufacture of
artificial teeth.
I wish it to be understood that I do not confine myself to the particular way of
pivotting the lid E to the screw F shewn at N in the accompanying drawings, as I
may employ any other suitable method of accomplishing this object, but
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) In a vulcanizing apparatus pivotting the lid E to the lower end of the screw F,
or otherwise suitably connecting it to the cross-bar J, so that the said lid is not
removed from the apparatus when the vulcanizing vessel is opened, substantially as
set forth.
(2) In a vulcanizing apparatus having the lid E pivotted to the screw F or otherwise
suitably connected to the cross-bar J, the use of feathers PP on the cross-bar J
entering notches in the edge of the lid to ensure the said lid always seating in the same
position, substantially as herein set forth.
AMBROSE MYALL,
21, Cockspur Street, London,
Agent for the Applicant.