Year: 1888

page_text: Пирогощению
I, SYDNEY PITT, of Sutton, in the County of Surrey, Gentleman, (a communication
to me from abroad by Thomas F Rowland, of the City, County, and State of New
York, and Warren E Hill, and Angus McLachlan, both of Brooklyn, Kings County,
New York.) do hereby declare the nature of this invention and in what manner the
saine is to be performed to be particularly described and ascertained in and by the
following statement
-
This invention relates to an improvement in furnaces for welding metallic seams,
and is especially useful for welding the seams of tubes
The invention will be readily understood from the accompanying drawing, in
which-
"
Figure 1, represents a general longitudinal view of the apparatus.
Figure 2, a cross section through the same showing the furnaces.
Figures 3, 4, and 5, details of the furnaces.
Figures 6, and 7, details of the carriage.
Figure 8, a view of a modified carriage.
The cylinder D to be welded is carried on the carriage J running longitudinally on
tracks. When it has been heated it is welded by the rolls C or other suitable
mechanism. The carriage J has adjustable sides, carrying rollers K K, K¹K'. These
are made adjustable in any suitable way but as shown are provided with slots and
bolts M as may be seen in Figure 7. The cylinder to be welded being held roughly
in position, as shown in Figure 6, the sides are approached as shown in Figure 2, and
the cylinder is thereby supported These rolls perimit the revolution of the cylinder
when desired. In Figure 8, instead of rolls, suitable fixed supports are substituted.
The welding furnaces A, B, are mounted on the carriage P running on the same
rails as the carriage J They are counter-balanced by weights O, the furnace A
being slightly under-balanced, and the furnace B being slightly over-balanced
by the weights O. The furnaces A B are carried upon the pipes E, which are
then themselves supported on the carriage P as shown These pipes are pivotted
on horizontal pivots R R, and can also turn laterally on the screws YY, by means of

page_text: which likewise their relative positions may be somewhat adjusted by removing the
pivots R R and adjusting the screws. The upper screw Y screws into the head or
upper part of the lower screw Y Air and gas pipes S T communicate with both the
pipes E. The furnace is peculiar in structure and is preferably made of fire brick.
Figure 3 represents a vertical section through Figure 4 on the line Z Z;
Figure 4 a longitudinal section through Figure 3 on the line xx; Figure 5 a
horizontal longitudinal section through Figure 3 on the line y y. The inside of the
furnace is substantially cylindrical in shape It is provided with two or more
deflecting partitions or baffle plates F G, by means of which the gas and air are
thoroughly mingled before they reach the burner H, which is made somewhat flaring
in shape, as shown in Figure 3 A considerable pressure of gas and air should be
used, the air pressure being greater than the gas. So long as the mingled gas and
air is travelling under some pressure through the pipes F combustion does not occur
but occurs only in the furnace in which the baffle plates perform a very important
function, for without them, or their equivalent, only a comparatively low degree of
heat can be obtained. In turning off the furnace, it is very important to turn off the
gas supply before turning off the air supply, otherwise an explosion in the furnace
would ensue.
The operation of the apparatus is readily understood. The cylinder D being placed
in position, the furnaces A B are withdrawn on the track, lighted, separated somewhat,
brought within and without the cylinder, and allowed to come together, when the
intense heat soon produces a welding condition in the metal.
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 1
claim 19:
1. The combination of the welding gas furnaces A B, supported upon the same
pivot, and a carriage J provided with adjustable mechanism for carrying cylinders of
different diameters, and bringing such cylinders in the proper relation to the gas
furnaces A B, substantially as described
2. The welding gas furnace A B carried upon the carriage P capable of longitudinal
motion, substantially as described
3 The welding gas furnaces A B combined with the pipes F, and longitudinally
movable carriage P, substantially as described.
4. The counter-balanced gas furnaces A. B, pipes E E E air and gas pipes S T, and
carriage P, substantially as described.
5. The welding gas furnace B provided with internal baffle plates or partitions, and
burner H located beyond said baffle plates in the flow of the gas and air, substantially
as described.
6. The combination of the gas furnaces A B, having their burners H facing each
other, the pipes E and the gas and air pipes S T, substantially as described.
7. The combination of two furnaces having their burning openings adjacent to each
other and each provided with internal baffle plates between the gas supply and the
burner, and means of introducing gas and air simultaneously to said burners,
substantially as described.
Dated this 5th day of June 1888