Mae’r gair ‘cladd’ yn cael ei ddefnyddio yn ‘cladd tato / potato clamp’, sef creu rhyw fath o bant yn y daear gan orchuddio’r tatws etc a^ chlotas, drain ac yn y blaen i’w cadw dros y gaeaf. Sgwn i ai’r un ystyr sy i ‘clamp’ mewn cysylltiad ag odyn?

Mary

Dwi wedi dod o hyd i 'odyn dros dro' am clamp kiln, ond mae'r ddau arall yn dal i fod yn ddirgelwch - diolch am unrhyw help.

C

Oes unrhyw un yn gyfarwydd â thermau'r diwydiant calchfaen/calch tybed, neu yn gallu fy nghyfeirio at ffynhonnell ddibynadwy?

Dwi'n chwilio am dermau ar gyfer gwahanol fathau o odynau calch ar ochrau mynyddoedd fel y Mynydd Du.

Y termau penodol dan sylw yw

Clamp Kiln, Flare Kiln a Draw Kiln.

Ychydig o wybodaeth:

Clamp Kiln:

Cut gorse, ferns, thorns, and underwood, in winter, where limestone is at hand; plough a ridge seven yards wide; place thereon a layer of fuel, then limestone, and so on alternatively to the height of three yards; and make flues in the fuel in all directions, that the fire may pervade the whole heap. Then cover the kiln with sods, and upon those, clay or marl; then set fire to it, and when it is well kindled, stop the mouths of the flues, and let it burn until the fire breaks out through the clay or marl; then cover again, and so on, until the fire breaks out the third time, when it will have burned sufficiently: when cooled a little, open it, and carry the lime to where it is wanted. Bestow lime once in nine years upon arable land and once in 18 years upon grassland.

Flare Kiln:

The clamp kiln method was replaced by the Flare kiln, a larger structure where the fuel source was separated from the limestone. These kilns produced clean lime but had to be partly dismantled to extract the lime

Draw Kiln:

In Draw Kilns, fuel and limestone were mixed in layers. These kilns were designed to be operated continuously (on a seasonal basis), but were not necessarily used in this way. They are constructed from stone, built against (out from) a natural bank usually with the charging hole flush with the quarry floor. According to Davies (1815) this type of kiln was introduced to south Wales in about 1775. They continued to be built into the early 20th century and some were used up to the 1970s.

Diolch am unrhyw awgrymiadau

Catrin