The failure to take grain to that mill to which it is bound by THIRLAGE (Scot.).
Longitudinal shutters sometimes incorporated into the outer end of the leading edge of PATENT SAILS. They are opened by the shutter mechanism so as to break up air flow in heavy gusts, thus reducing the speed of rotation of the sails. Also known as skyscrapers.
A warning bell triggered by lack of grain in the HOPPER; also a bell which gives warning for anything else, e.g. from a small flood wheel. Also known as a warbler.
see WIND ENGINE.
A chain used in conjunction with a winch mounted on the tail pole of a windmill to turn and secure the mill; made fast to CHAINPOSTS set around the base.
Platform at the lower end of the tailpole to fix the end of the spoke chain.
Another term for CHAIN POSTS.
Twist or pitch in a sail, resembling that of a propeller, to catch the wind & give driving power. Usually 5 degrees at the tip and about 25 degrees at the HEEL, measured from the plane of rotation.
SAILS of a WINDMILL that run anticlockwise when viewed from the front of the mill.
A device for raising water for drainage purposes, consisting of a long sloping coarse-pitched screw, made of wood or metal, rotating in a close fitting trough. See also AUGER. The Japanese have a small archimedean screw which is used "in reverse" for producing power on a farm.
Cast-iron SPRATTLE ARCH much used by J.J.Armfield Co., Ringwood, Hampshire, but in use long before.
The 'spokes' of a WATERWHEEL.
A wheel having radial arms set on a hub, mortised into a wooden shaft or cast with it.
see COMPOSITION STONE.
A hollow tower designed to deliver a jet of water under pressure to a horizontal waterwheel. Used in Spain and the Middle East.
A device for cleaning grain before grinding, utilising a FAN (2) to produce a current of air to remove dust and impurities.
The driving mechanism (shafts, belts or gears) to auxiliary equipment in a mill, or associated with an auxiliary engine.
The spike or beard on a grain of barley (Scot.).