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HOLE MOUTH [5 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2012-04-23

English

Subject field(s)
  • Archaeology
  • Architecture
DEF

Opening for a gun.

CONT

In the early gun-loops, the base of the hole is circular for the mouth of the piece and the upper part a slot for sighting. Sometimes the slot has a circular hole at the head... At Kirby Muxloe..., the hole and slot are separated. Later the hole of the gun took various forms, but generally it was widely splayed outward at the sides to give the gun the greatest possible range....

Key term(s)
  • gun loop
  • gunloop

French

Domaine(s)
  • Archéologie
  • Architecture
DEF

Meurtrière, ordinairement de forme ovale ou circulaire et surmontée d'un trou de visée, aménagée dans un mur d'un ouvrage de défense pour permettre le tir au canon.

CONT

[...] la galerie de contre-escarpe [...] permet [...] l'observation, la protection du fossé. Dans cette galerie longue d'une cinquantaine de mètres, on observe des casemates, des ouvertures sous formes de meurtrières (permettant le passage des flèches, ou des projectiles lancés par les arquebuses), mais aussi de canonnières. Ces dernières permettent le passage des boulets de canon.

CONT

Les allèges des fenêtres de plusieurs tours comportent aussi des canonnières, consistant en un simple trou rond. [...] On en rencontrera à profusion dont la bouche s'ouvre à l'extrémité inférieure d'une meurtrière verticale. [...] Ailleurs, la canonnière se composera de deux ouvertures légèrement séparées : l'une circulaire [...], l'autre verticale.

Spanish

Campo(s) temático(s)
  • Arqueología
  • Arquitectura
DEF

Aspillera a través de la cual se dispara un cañon.

Save record 1

Record 2 1999-10-21

English

Subject field(s)
  • Blasting Work (Mining)
  • Construction of Boreholes (Mining)
CONT

"Bulling" or chambering of holes. The bottom of a small diameter borehole(such as diamond drill or wagon drill hole) may be enlarged by lighting and dropping a gelatine dynamite safety fuse primer into the hole. The burden is of course, too great for this small charge to break the ground. Its effect is to pulverize the rock in the vicinity and to expel it from the mouth of the hole in the form of dust. Meanwhile, the bottom of the hole has been increased in diameter in the form of a bulbous-shaped chamber, which will then accommodate a larger quantity of explosive. Care should be taken to allow the bottom of the hole to cool down before adding further explosives. The operation is variously called "bulling" or "chambering" or "springing". The method has been used chiefly in quarry work on bench holes.

French

Domaine(s)
  • Travail aux explosifs (Exploitation minière)
  • Aménagement du trou de sondage (Mines)
CONT

Le "pochage" consiste à faire exploser au fond d'un trou, en les renouvelant plusieurs fois, de petites charges d'explosifs. On a parfois recours à ce procédé dans les terrassements de rocher ou dans les carrières pour élargir à sa base un trou de mine de petit diamètre, afin d'y concentrer une plus forte charge d'explosif.

Spanish

Save record 2

Record 3 1992-06-10

English

Subject field(s)
  • Mining Dangers and Mine Safety
  • Blasting Work (Mining)
OBS

"collar" : The beginning point of a shaft or drill hole, the surface.... The mouth of a mine shaft.... The mouth or opening of a borehole.

CONT

Bottom priming should be employed where Anodet Delays, High Strength Blasting Caps, or safety fuse and blasting caps with conventional explosives primers are used. Collar priming is recommended with electric blasting caps, with the caps placed in the boreholes after pneumatic loading is complete.

OBS

See also the TERMIUM record for "collar primed".

French

Domaine(s)
  • Exploitation minière (dangers et sécurité)
  • Travail aux explosifs (Exploitation minière)
OBS

Position de la cartouche-amorce. Ordinairement, pour le tir instantané, la cartouche-amorce occupe une position près de l'orifice du trou ou directement sur la charge même. Cependant, en certains cas, dans les trous de grand diamètre, on pratique l'amorçage en partant du fond du trou.

Spanish

Save record 3

Record 4 1992-06-10

English

Subject field(s)
  • Mining Dangers and Mine Safety
  • Blasting Work (Mining)
CONT

No person shall charge a hole with explosives unless there is placed in the charge a properly prepared detonator and (a) the detonator is securely placed so that it cannot be moved while the hole is being charged; or (b) the hole in which the detonator is placed is collar primed. [Source : projet de règlement modifiant le Règlement canadien sur la sécurité dans les mines.]

OBS

"collar" : The beginning point of a shaft or drill hole, the surface.... The mouth of a mine shaft.... The mouth or opening of a borehole.

OBS

The next context explains in our view how a hole can be "collar primed". See also the TERMIUM record for "collar priming".

OBS

The primer is most effective when firing independent charges if it is loaded with the detonator pointing toward the major portion of the explosives column. The primer should be placed near the collar of the hole in the direct position (cap pointing inward) since it will then impart the strongest impulse toward the balance of the explosives column and the bottom of the hole.

French

Domaine(s)
  • Exploitation minière (dangers et sécurité)
  • Travail aux explosifs (Exploitation minière)
OBS

Position de la cartouche-amorce. Ordinairement, pour le tir instantané, la cartouche-amorce occupe une position près de l'orifice du trou ou directement sur la charge même. Cependant, en certains cas, dans les trous de grand diamètre, on pratique l'amorçage en partant du fond du trou.

Spanish

Save record 4

Record 5 1983-05-02

English

Subject field(s)
  • Archaeology
OBS

a pottery with a large opening

French

Domaine(s)
  • Archéologie

Spanish

Save record 5

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