A New or Improved Process for Manufacturing Smoke and Partitioned Iron or Steel Tubes for Steam Boilers.
Year: 1893

page_text: Date of Application, 4th Apr., 1893-Accepted, 2nd June, 1893
A New or Improved Process for Manufacturing Smoke and Partitioned
Iron or Steel Tubes for Steam Boilers.
I, ANATOLE BERE of 22, Chaussée d'Antin, Paris, France Engineer, do hereby
declare the nature of my invention for A NEW OR IMPROVED PROCESS FOR
MANUFACTURING SMOKE AND PARTITIONED IRON OR STEEL TUBES FOR
STEAM BOILERS, and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
My invention has for its object a process for manufacturing smoke and partitioned
iron or steel tubes for steam boilers, tubes for which I have already obtained a
Patent Nr. 8391, A.D. 1892.
Several processes may be used for manufacturing these tubes, I will now point
out one for which I apply for a fresh Patent.
The process is as follows:
The partition is placed inside the tube, which undergoes successive and increasing
heatings till the metal (iron or steel) becomes white and at the same time is
stretched so as to pass through rings of continually decreasing diameters thus
producing a gradually increasing compression.
A close contact and perfect welding between the edges of the partitions and the
sides of the tubes are thus produced, so that the flames, gases and smoke going
through the steam boiler tubes thus made can produce no separation nor disjunction
of the said partitions. These tubes therefore work exactly as if made of one piece.
As may be seen, this process is quite independent of the shape of the partitions
which may be straight, of various or helicoidal sections or of several branches,
their edges only requiring to be forced into the closest contact with the sides of
the tubes.
When the tubes are of small diameters, such as those of locomotives, the
partition should be central in order to divide them into two equal parts. This
result is obtained by means of stays or of pins. These stays are of wood, charcoal or
of any other combustible substance. They are placed on each side of the partition
and burnt during the heating and the stretching of the tubes.
The pins, the ends of which press against the inside of the tube, pass through
When
the partition to maintain it in a central position and are of wood or of iron.
of iron they adhere to the tubes and must be removed after the tubes are finished.
The tubes of large diameters may be divided into more parts than two by means of
partitions-radiating-from_the_centre, no cauls nor pins being required.
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 process of manufacturing smoke and partitioned iron or steel tubes for
steam boilers, a process consisting in successive and increasing heatings until the
metal becomes white and in subsequent stretchings through rings, producing
gradually stronger compressions substantially as above described.
2. In the process for manufacturing smoke and partitioned iron or steel tubes for
steam boilers, by successive heatings and stretchings, the optional use of stays or
pins to steady the partition during the manufacturing, in order to divide the tubes
into two equal parts, substantially as above described.
Dated this Fourth day of April 1893.
A. H. REED,
Agent for Applicant.