Abstract:
Convected air from the room to be heated enters two first air spaces (10) through two front inlets (12) and circulates through passageways (13) between inner and outer casings forming the fireplace and re-enters the room through front air outlets (14). Cold fresh air from outside the room enters a second air space (14), between the two first air spaces (10), and can be fed into the room through a control vent (16) for promoting combustion within the fire and/or can be fed into the first air spaces (10) so as to supplement the convected air flowing through the passageways (11).
Abstract:
A shotgun cartridge (10) for mustering animals, the cartridge (10) having a projectile (16) at least partially formed from a resilient material such as rubber or soft plastics and can be adapted to be fired against the hide of an animal but not to penetrate the hide. Also included in the disclosure is a wad (15) made from plastics and is injection-moulded.
Abstract:
A highly effective fin-type heat exchanger (A), which is easily reproduceable, versatile in application, low cost, comparatively compact, and light in weight. The construction provides for a low resistance to a flowing medium, by utilizing an array of highly heat conductive fins (3, 26), each fin (3) projecting in one continuous piece, through a partition (1, 23) of lower thermal conductivity, which separates two mediums. This intersection is sealed, to prevent cross-contamination between the two mediums. High thermal exchange ability is achieved by a configuration in which the flowing medium sequentially impacts the array of highly heat conductive fins (3), which extract the heat contained in this medium, and conduct the heat through the separating partition (1, 23), into the second medium. The apparatus and method have particular utility in a number of applications such as: waste heat recovery (Figs. 1-6, 9 and 12); water heaters (Fig. 8); a combination muffler and heater (Fig. 10); earth tubes (Fig. 7); solar thermal transfert (not shown); or numerous thermal dissipating applications, where the fins (3, 26) are either embedded into (Figs. 13 and 14) or project through (Fig. 11) a lesser conductive member (23, 28, 29), and extend outwardly into the ambient atmosphere.