GB190507681A - Improvements in Surface Apparatus for use in Heating or Cooling - Google Patents

Abstract

7681. Watel, H. G. April 11. Heating gases and liquids.-In surface heating- apparatus, the elements, which are formed of dished plates, are provided with the specially-constructed internal strengthening-frame shown in Figs. 1 and 3. Various methods of assembling the elements are described. The strengthening or skeleton frame D may be flanged, undulated, or perforated. The elements may be assembled, as shown in Fig. 2, by passing tubes F, having externally screw-threaded surfaces at each end, through the apertures C in the upper and lower ends of the elements. Distancepieces and washers L<1>, L<2> of jointing-material are inserted between the elements, which are clamped together by means of nuts H<1>, H<2> screwed on the ends of the tubes F. Apertures G in the tubes F allow the fluid to flow to and from each element. In a similar arrangement, Fig. 6, the elements with the internal skeleton frames are held in position on tubes, which are externally screw-threaded throughout their length, by nuts H<3>, H<4> and washers L<5>, L<6>. Fig. 4 shows another method of assembling the elements, in which flanged and externally screwthreaded tubes N' passing through the apertures in the plates are connected by a tube R having part of the inner surface provided with a right-handed screw-thread and the other part provided with a left-handed screw-thread. Or the tubes may be of different diameters and provided alternately with internal and external screw-threads, so that one tube N' may engage the adjoining tube N<3> as shown in Fig. 5.