Improvements in Dentists' Vulcanizing Apparatuses.
Year: 1892

page_text: Date of Application, 28th Dec., 1892-Accepted, 4th Feb., 1893
COMPLETE SPECIFICATION.
Improvements in Dentists' Vulcanizing Apparatuses.
I. FRITZ MANNHARDT, of 151 Friedrichstrasse, Berlin, Germany, 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 dentists' vulcanizing apparatuses, and it has for its
object to simplify and improve their construction.
And in order that my said invention may be properly understood, I have here-
unto appended an explanatory sheet of drawings, whereon :-
Fig. 1 is a side elevation of the apparatus.
Fig. 2 is a side view, at right angles to Fig. 1.
Fig. 3 is a vertical section.
Fig. 4 is a cross section, on line y-y, Fig. 1.
Fig. 5 is a plan of the ring a.
Fig. 6 shows a modification.
Referring to the drawings, whereon the same reference letters, wherever repeated,
indicate similar or like parts:-
The apparatus consists of the usual stand B, with cylindrical heating casing b.
Secured rigidly to the upper end of the casing b, is a ring a, which has jaws c, c',
on each side. Pinned binge-wise, preferably in the jaw c', by pin y, is a hoop or
bridge C. The bridge C carries a closing lid D, which has guide jaws D¹ on it.
Fitted to the top of the lid D, is a screwed spindle e, which passes through a tapped
hole in the bridge. The screwed spindle has, on its upper end, a hand wheel f
for turning it. The lid is guided in its up and down movements by the guides D',
which slide on the side parts d, d¹, of the bridge.
Fitted in the ring a is the receiver A.
The receiver may be provided with the usual pressure gauge and thermometer.
With this apparatus, when it is desired to place articles in the receiver to be
vulcanized, all that is necessary is, to take out the locking pin g¹ and turn
back the bridge and lid in the manner shown at Fig. 3, the pin g serving as a
hinge.
When the receiver A has been filled, the bridge C is turned down again or
closed, and the locking pin gl inserted through the jaw c and a hole in part d of the
bridge. The hand wheel is now turned, so as to tightly close down the lid D,
and the joint is made thoroughly tight by the usual lead filling. Heat can now be
applied, and the articles vulcanized.
In Fig. 6, a modified form of hinged lid is shown. In this view, instead of
the bridge turning in a vertical plane, it turns in a horizontal plane, as shown in
dotted lines. To enable this to be done, the jaws c, c', are dispensed with, and
the projections on the ring a are made solid, with a hole through the one c'. Passed
through the hole, is a pivot i, which is, or may be, in one with the arm d' of the
bridge C. The other arm d is cut out, as shewn, and is caught or locked, when
desired, by means of a projecting part or catch h on the ring a.
When being used, the apparatus should be set on the work table.
My improved apparatus is self-contained, gives very little trouble in opening and
closing, and is compact in construction. As will be seen, no screw-drivers or the
like are required, as usual, to open the lid, nor is it necessary to take any part of
the apparatus asunder for this purpose.
The apparatus may be modified in its details of construction, without departing
from the principle of the invention.

page_text: 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 general arrangement and combination of parts of the improved vulcanizing
apparatus, substantially as herein before described with reference to the drawings
annexed.
2. In a dentists' vulcanizing apparatus, the combination with the stand (B), and
receiver (A), with its casing (6), of a ring, fitted to said casing, and of a lid, hinged
to said ring, substantially in the manner herein before described and shown, under
modified arrangements, on the drawings annexed.
3. The combination with a dentists' vulcanizing apparatus, of the construction
herein before set forth, of a hinged bridge C, carrying a screw-down lid D, sub-
stantially as herein before described and shown on the drawings annexed.
Dated this 27th day of December 1899
H. D. FITZPATRICK,
70, Wellington Street, Glasgow, Agent.