GEAR wheel with COGS on the plane face or flat of the wheel, and not around the outer edge, used in conjunction with a SPUR PINION, to drive at right angles. As distinct from a spur-wheel where the cogs project radially.
A marking tool with an adjustable, sharp scriber, which may be set up on a fixed point to scribe construction lines on to "blank" wooden teeth as the wheel is turned. In this way, the teeth may be marked to a perfect circle irrespective of the truth of the wheel itself.
A small set of sails having typically from 6 to 8 wooden boarded BLADES, set at right angles to the main windmill SAILS, and connected to the winding gear to allow the mill to move automatically into the wind. Located to the rear of the POST MILL or the CAP of a TOWER or SMOCK MILL. The "Fan" is connected by SHAFTS & GEARS to the rack on the curb or to TRAM WHEELS as appropriate, to keep the sails facing the EYE OF THE WIND. There many variants of design. Patented by Edmund Lee in 1745. Also known as FLY TACKLE. See FAN, FLY, FAN SPARS etc. See WINDING GEAR.
Two adjacent belt pulleys of the same diameter on a driven shaft, one FAST (fixed) to the shaft the other LOOSE. The belt is guided onto the FAST pulley by a STRIKER to engage the drive, or to the LOOSE pulley to disengage the drive.
(1) Longitudinal rib cast on a shaft, or key fitted thereto, over which a gear such as a stone nut may be slid axially to engage or disengage with another gear. SPLINE. KEY.
(2) The sloping edge of the FURROW where it meets the LAND.
Sometimes pronounced 'felly'; One of the sections forming the rim of a wooden wheel, including the rim of a wooden waterwheel. Where the wheel rim has CANTS for attachment to the spokes, the felloes are the additional parts of the rim through which the COGS are morticed.
A primitive forerunner of the pound lock; adjustment of a removable staunch or sluice released a flash of water on which boats could be hauled upstream. Its use could seriously interfere with the running of a watermill and their use on many rivers led to disputes between millers and boat owners.
A vessel containing milling machinery and powered by undershot wheels, moored where the current is strongest (e.g. midstream or beneath the arch of a bridge) or where access is easiest (e.g. near the river bank) also known as a BOAT MILL.
(1) The wood or metal blades, or paddles, of an undershot waterwheel. Often made of Elm, Oak or Pitch-pine. Fixed by the STARTS to the rim of the wheel. The boards are pushed by the water to turn the wheel by absorbing kinetic energy from the water.
(2) The BLADES on a SCOOP WHEEL.
Narrow waterwheel of moderate diameter with radial floats placed at the bottom of a chute, it worked by the impact of the water. Used primarily in up-and-down saw mills, it was capable of providing as many as 120 strokes of the saw per minute (so called because of the birdlike sound it makes).
(1) Where power is transferred from one smooth-rimmed wheel to another by the friction caused by bringing them forcibly together. They may have flat or bevelled faces and may be faced with end-grain wood or with iron against wood. A form of clutch used on sack hoists and other devices.
(2) Typically the friction drive for a sack hoist from a wheel on the upright shaft. See SLACK BELT.
(1) hardwood ring drive added to the wallower to drive the sack hoist via a friction wheel. See FRICTION DRIVE.
(2) iron ring on the cap or dust floor that engages with a similar ring on the bottom of the centring frame.
The method of operating rollers so that they are run with the shorter face of the corrugated cutting edge on the faster rotating roller meeting the longer face of the corrugations on the slower rotating roller. Called 'SHARP TO SHARP' in USA.
Two strips of wood having a length of the longest furrow on a millstone and a width of the furrow & land respectively. Used to lay out & maintain the correct dimensions for HARP dressing. Also known as SPLINES.
The main grooves or channels cut into the grinding face of a MILLSTONE, producing a sharp edge to assist in the grinding, to allow an admixture of air to cool the meal and to move grain from the EYE to the edge of the stone as it is ground. See also MASTER FURROW. 2nd, 3rd 4th FURROW