摘要:
In order to rescue a windmill from a stall in reverse wind conditions, a vane (5) which normally trails downwind has its end portion (6) hinged about an upright axis (7). Reverse wind pushes this (6) out of the plane of the vane (5), creating misalignment with the reverse wind thereby starting movement of the vane (5) and enabling the wind to act on the vane to turn the windmill to face into the wind.
摘要:
In a domestic or small commercial heating boiler the combustion air which is supplied by a fan (38) to the burner (32) is shut off by draught control means (48) when the fan (38) is not running. This prevents loss of heat while the burner is not firing. Preferably the draft control means is a gravity biassed flap (48) in the path of combustion air to the burner. To reduce the need for cleaning, an air inlet (44) to the boiler is provided with a filter (70) to clean the air wich enters.
摘要:
In order to rescue a windmill from a stall in reverse wind conditions, a vane (5) which normally trails downwind has its end portion (6) hinged about an upright axis (7). Reverse wind pushes this (6) out of the plane of the vane (5), creating misalignment with the reverse wind thereby starting movement of the vane (5) and enabling the wind to act on the vane to turn the windmill to face into the wind.
摘要:
A heating appliance which burns solid fuel has a bottom feed to a furnace vessel (24) conveniently by means of an auger (28). The furnace vessel (24) is arranged to be driven in rotation through gearing (56,57) which assists keeping a uniformly distributed fire in the furnace vessel, and makes possible the discharge of ash overflowing from the top of the vessel through an airlock system (64 to 71). A water jacket (56) surrounds the furnace vessel and a poker (102) is moved in the furnace vessel as it rotates. Combustion air can be blown or sucked in by a fan (62). The heating appliance can take the form of a domestic cooker with ovens (14,16) and also heating water (122) for central heating.
摘要:
A heat exchange apparatus for removing residual heat from a domestic or small commercial boiler has three heat exchange vessels 12,14,16 which contain water to be heated bythetheflue gas. Provision is madefordraining out condensation which may form in the apparatus: condensation forming on these cooled vessels 12,14,16 falls or is guided onto a base 80 shaped so that condensate drains out through an outlet 84 provided. A reversal 90 in the direction of flue gas proximate the base of vessels 14 and 16 promotes deposition of fly ash. Deposited fly ash can be removed through a door 92. The apparatus is made from steel plate. To protect it against corrosion caused by sulphur acids contained in the flue gas, and which dissolve in the condensation, its inner casing is dip-coated with a thermosetting synthetic resin paint curable by stoving.
摘要:
A windmill having concentric rings, 12, 14, with multiple blades 16 pivoted to and extending between them has springs to position the blades 16 against wind pressure and hydraulic damping of blade motion.
摘要:
A heating appliance which burns solid fuel has a bottom feed to a furnace vessel (24) conveniently by means of an auger (28). The furnace vessel (24) is arranged to be driven in rotation through gearing (56,57) which assists keeping a uniformly distributed fire in the furnace vessel, and makes possible the discharge of ash overflowing from the top of the vessel through an airlock system (64 to 71). A water jacket (56) surrounds the furnace vessel and a poker (102) is moved in the furnace vessel as it rotates. Combustion air can be blown or sucked in by a fan (62). The heating appliance can take the form of a domestic cooker with ovens (14,16) and also heating water (122) for central heating.
摘要:
A windmill blade (16) comprises a torsion member (20) extending along the blade, a plurality of ribs (22) fast with the torsion member and extending perpendicularly from the torsion member at points spaced along its length, and an outer skin (28) over the torsion member and ribs.