Improvements in Photographic Burnishing Machines.
Year: 1892

page_text: COMPLETE SPECIFICATION.
Improvements in Photographic Burnishing Machines.
I HENRY BERNOULLI BARLOW, of 17 St. Ann's Square, Manchester, in the
County of Lancaster, Patent Agent, do hereby declare the nature of this inven-
tion, which has been communicated to me from abroad by James Henry Smith,
of 306 Forty-first Street, Chicago, Illinois, in the United States of America,
Merchant, 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 photographic burnishing machines, of which the
following is a full, clear and exact description, reference being had to the
accompanying drawings forming a part of this Specification in which,
Fig. 1, is a side view of a burnishing machine embodying the features of my
invention.
Fig. 2, is an enlarged longitudinal sectional view in detail of the hollow
burnishing roll showing the adjustable burner therein.
Fig. 3, is a transverse vertical sectional view taken upon the line a Fig. 1.
Fig. 4, is a longitudinal sectional view in detail of the burner, and
Fig. 5, is an enlarged detail view of a portion of the inner tube of said.
burner.
Corresponding letters of reference in the different figures, indicate like parts.
My invention relates to certain improvements in that class of photographic
burnishing machine in which the burnishing roll is heated from within by means of
gas and my object, primarily is to so construct the burnishing roll that a sufficient
supply of air may be admitted thereto to support combustion, while satisfactory
means may be provided for producing circulation and carrying away heated gases,
without causing inconvenience to the operator.
A further object is to so construct and support the burner within the roll that a
uniform heat may be imparted to the latter, that the burner may be maintained
concentric with the roll, and that the flame within the burner may be reduced_to
but one or two small jets when the machine is not in active or continuous use.
these ends, my invention consists in certain combinations of elements hereinafter
more particularly described and claimed.
To
Referring to the drawings, a represents the frame of my improved burnishing
machine, in suitable bearings in which is mounted the feed roll b, and burnishing
roll c.
The burnishing roll c, is, by preference, more or less tapered at the
respective ends as more clearly shown in Fig. 2, and one of the journals is made
hollow for the introduction of a tubular burner d. In the tapered ends of the
rolle,
is formed one or more, but preferably a series of bores or openings e for the
purpose hereinafter stated. Surrounding the opposite end of the roll e from that
in which the gas is introduced to the burner, is a metal shield which is fitted as
closely to the end of the roll as may be without being brought into actual
contact, as more clearly shown in Figs. 2 and 3. Said shield is attached rigidly to
the journal bearing a' by means of screws f¹ Fig. 2, and is extended laterally and
upwardly therefrom as more clearly represented in Fig. 3. A socket fis
provided for the reception of a hollow tube g, which, with the shield f, forms a
chimney for the removal of the products of combustion formed in the roll. A
sufficient space is left between the end of the roll and the shield to form a cavity
to enable the heated gases to pass through the openings into said shield or
chimney. By means of this improved construction I am enabled not only to
evolve the roll but to produce a circulation therein so as to ensure complete
combustion.
Within the roll c I place the burner d which consists of two concentric

page_text: -
tubes d'd. The outer end of the former is supported in a bearing, h, which is
rigidly attached to the journal-bearing by means of screws as shown, while the
opposite end is provided with a journal or extension j Figs. 2, 3 and 4, which
consists of a plug rigidly secured within said tube, the outer end of which is
reduced to a proper size as shown. A bore, c¹ formed in the journal e², Fig. 2 5
serves as a loose bearing for the journal j. By this means the burner is at all
times kept concentric with the roll; which feature is important, owing to the fact
that in rolls of considerable length, the burner, without support, is liable to sag :-
thereby producing most unsatisfactory results. The concentric tubes, dd, are
provided with a series of perforations which may be arranged in any desirable
manner, but are preferably formed in the bottom of the burner in zig-zag form, or
in lines oblique to the axis of the tubes. Said perforations should be placed
sufficiently near to each other to enable the flame to communicate readily from one
to the other; and those in the inner and outer tube should be adjusted to register
with each other. At the end of the roll where the air is introduced to support
combustion, the influx of air tends to cool the roll, and hence a larger
flame is needed at that end. At the middle of the roll less flame is
required, and at the end upon which the chimney is placed, the rapid escape
of heat renders an increase of flame essential. To meet these conditions
and to enable the adjustment to be varied to the extreme limit. 1 provide
a series of triangular or wedge shaped slots 1, in the inner tube, so arranged as to
conform to the conditions stated. At one end of the tube I have provided a
comparatively long slot. At intermediate points, smaller ones may be sufficient,
while at the end at which the chimney is located a large and wider slot or
opening m Fig. 4 may be formed. The slots are shaped substantially as shown,
one edge of the slot conforming to the line of perforations, while the other edge is
oblique thereto; so that when the intermediate perforations are closed by rotating
the inner tube, a further adjustment may serve to cut off the perforations opposite
the slots l, one by one, until but a single perforation may be left open in any one
part of the burner. By means of this arrangement, the most delicate adjustment
of heat may be obtained when desired, or all of the jets may be shut off but those
at the extreme end.
It is important to place the perforations of the burner upon the bottom; as this
enables the roll to be uniformly heated while standing still-the tendency of the
heat being to ascend.
In Fig. 1, n indicates the valve by neaus of which gas or vapor may be
admitted to the burner, while », is the lever which is adapted to regulate the
flow.
The advantages accomplished by means of my improvements, are that complete
circulation, and perfect combustion are obtained within the roll, it is uniformly heated
throughout its length, a perfect regulation of temperature is obtainable, and the
heated gases are carried away from the operator.
Having now particularly described and ascertained the nature of this said inven-
tion, as communicated to me by my foreign correspondent and in what manner
the same is to be performed, I declare that what I claim is :-
1. The combination in a photographic burnisher of a hollow burnishing roll,
openings formed in the respective ends thereof between the periphery and the
journals, a gas or vapor burner inserted within said roll, and a chimney provided
with a sleeve or shield arranged to surround one end of said roll, and in
shown and
operative proximity to the openings therein, substantially as
described.
2. The combination with a hollow burnishing roll having a hollow journal, of
a tubular burner projected through said journal, one end of said burner being
supported by means of a stationary bearing, and the other having a journal loosely
supported in a bore formed in the spindle of the roll, substantially as shown and
described.

page_text: 3. The combination in a burnishing machine of a hollow burnishing roll, a
tubular burner mounted therein, openings e at the respective ends, and a chimney
in operative communication with the openings at one of said ends, substantially as
specified.
4. The combination with a hollow burnishing roll, of a tubular burner mounted
thereon, consisting of two concentric tubes, perforations therein arranged to register
with each other, and varying in size in proportion to the volume of flame required
in the respective parts of the roll in which they are located-to insure uniformity
of temperature, substantially as shown and described.
5. The combination with the hollow burnishing roll c, of the tubular burner d,.
consisting of the concentric perforated tubes d', d³, and provided with the journal j,
substantially as specified.
6. The combination with a hollow burnishing roll, of the tubular burner d,
consisting of the concentric perforated tubes d, -the latter of which is
provided with triangular or wedge shaped slots l, arranged and varying in size
substantially as shown and described.
7. The combination with a hollow burnishing roll, of a tubular burner consisting
of two concentric tubes, provided with a series of perforations, arranged in zig-zag
form upon the bottom of the burner, and adjusted with each other, substantially as
described.
1°
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L 1000