Framing.
1. A mode of putting parts of a structure together.
Joinery framing is of various descriptions, as square, bead, bead and fillet, ogee, etc., etc. See the following examples, which all have
flat panels and square backs: —
| a, ovolo and square. | c, quirk-ovolo fillet. |
| b, quirk-ovolo. | d, quirk-ovolo bead. |
| e, quirk-ovolo cock-bead or bead and fillet. | g, quirk-ogee. |
| f, ogee and square. | i, quirk-ogee, bead, and fillet. |
| h, quirk-ogee and quirk-bead. | j, cavetto. |
| k, cavetto, bead, and fillet. |
 |
|
Joining-framing. |
The following vary in the
panels: —
l, quirk-ovolo and bead, raised panel and square back.
m, quirk-ovolo and bead, raised panel with ovolo on the rising, and square back.
n, quirk-ovolo and bead, raised panel, with ovolo on the rising groove round the face, and square back.
The list might be much extended.
o is square-framing, the simplest description of framing, having no molding on either side.
2. (
Mining.) An operation upon pounded or stamped ores by which they are sorted into grades of comparative weight and consequent richness.
The
framing-table is eight feet long, four feet wide, and has a ledge around it. It is suspended in an inclined position, on pivots, so that it may be tipped into a vertical position when full, discharging its contents into separate cisterns beneath; the reason for the separation of the receptacles will be apparent presently.
At the upper end of the frame is the jaggingboard, over which the sluices are so distributed that a small stream of water shall carry them gradually down on to the frame.
The richer portions of the ore rest upon the upper part of the frame, and the poorer, lighter portions are carried farther down; light impurities escape with the water at the lower part of the frame.
The ore on the frame is occasionally stirred with a rake, that every portion may be subjected to the action of the water.
When the
frame is sufficiently full, the latch which held it horizontal is lifted, and the frame tipped up into a vertical position, so as to tip out its contents, which fall into the vats beneath.
These
[
914]
 |
|
Framing. |
vats are arranged in a row, so that they may respectively receive the
slimes which have accumulated nearer to or farther from the head of the frame, the richness being determined by the proximity to the head or upper portion.
The frame is then readjusted, a quantity of slimes spread on the
jaggingboard, and the operation recommences.
The contents of the cisterns are treated by subsequent processes of a nature adapted to their respective qualities.
Analogous processes are described under buddle ; trunk ; Keeve ; jigger ; tye, etc. (which see).
