摘要:
A seal for sealing between a cable and a casing enclosing part of the cable, comprising: (a) a wall member (3) having a plurality of substantially concentric removable portions (5) which may be selectively removed to provide a cable aperture of required diameter through the wall member (3); and (b) sealing material (9) retained by the wall member (3), which seals, in use, around a cable extending through the cable aperture in the wall member (3); wherein, in use, when a removable portion (5) of the wall member (3) is removed, a corresponding portion of the sealing material (9) is also removed, thereby providing a cable aperture of the required diameter through the sealing material (9).
摘要:
In a method and apparatus for the supply of an optimised quantity of catalyst to a core shooting machine for the manufacture of cores or moulds for casting processes wherein a catalyst is extracted from a pressurised vessel (11) in liquid or gaseous form and is mixed with a purging gas before it is introduced into the core shooting machine, firstly an optimised quantity of catalyst and secondly the purging gas at a pressure of 0.1 to 10 bar are fed into a pressure container (15), the catalyst and purging gas are mixed in the pressure container (15), and the resulting mixture is introduced into the core shooting machine. When the catalyst is used in liquid form it can be transformed from the liquid to the gaseous form in metering bellows (20) located between and connected to the pressurised vessel (15) and the pressure container (15).
摘要:
A generally disc-shaped polymeric insulating article (14) is in two parts to fit around the core (4) of an insulator (2). A first part (22) of the article (14) is substantially C-shaped to fit around the insulator core (4), and the second part comprises an insert (30) that slidably engages the first part (22) so as to secure the article in place. The article (14) projects a substantial distance radially from the insulator (2) to prevent animals and the like, bridging the length of, and thus electrically short circuiting, the insulator (2).
摘要:
In a method for the manufacture of sand cores for metal casting processes by the urethane Cold Box Process gaseous trimethylamine is conducted through parts of a metering device (3) and then, in a concentration of from 0.01 to 0.12 wt.% based on the quantity of sand used per core into a core shooting machine (4) where it is brought into contact with the sand, and prior to the introduction of the gaseous trimethylamine into the core shooting machine (4) a purging gas is introduced, the relationship between the trimethylamine and the purging gas being such that for a quantity T of trimethylamine the quantity L of purging gas used is in the ratio of T:L of from 1:1000 to 1:10000.
摘要:
A method of concurrently receiving and transmitting multiple telephone signals between a first location and a second location over a single twisted pair, said method comprising: at said first location: receiving a first digital signal from said second location over said single twisted pair; converting said first digital signal into a first higher-rate binary signal; converting said first higher-rate binary signal into "n" analog telephone signals, where "n" is greater than 1; converting "m" analog telephone signals into a second higher-rate binary signal, where "m" is greater than 1; converting said second higher-rate binary signal into a second digital signal; transmitting said second digital signal over said single twisted pair to said second location; and wherein said first and second digital signals are selected from the group consisting of 2B1Q signals and 4B3T signals.
摘要:
An over-centre closing device for closing together first and second parts of an article, comprising a lever pivotally attached to an arm which is pivotally mounted to the first part of the article, the lever having an engagement surface which engages the second part of the article and fastens the two parts of the article together when the lever is in its over-centre position in use, wherein the lever has an extension which extends beyond the engagement surface and which may cooperate with the second part of the article to provide initial closing leverage during an initial stage of closing the article and which allows the engagement surface to contact the second part of the article to provide final closing leverage during a final stage of closing the article.
摘要:
Apparatus for arranging a plurality of stacks of optical fibre splice organizers in a closure comprises a frame and at least two optical fibre splice organizer supports located on the frame, each organizer support being arranged to support a stack of organizers. The frame may be elongate and the organizer supports may each support a stack of organizers which extends laterally with respect to theframe. The organizer supports may be in one or more pairs, the supports of each pair being arranged back-to-back.
摘要:
A sealing arrangement for sealing an annular space around one or more elongate objects comprises: (a) a sealing device (25) having a port (23) extending therethrough; and (b) an adaptor (1) which can be placed within the port (23), comprising one or more openings for receiving at least one of the elongate objects; wherein the sealing arrangement comprises a sealant (5, 29) and compressing means (7a, 7b, 27a, 27b) for compressing the sealant, which compressing means can be moved longitudinally with respect to the elongate object(s) to compress the sealant is urged into sealing contact with the elongate object(s).
摘要:
A kit of parts for slidably mounting a cable closure to a wall, comprising:
(a) a mounting bracket, comprising a first part which may be fixed to a wall, and a second part which, at least in use, is slidably attached to the first part and on which a cable closure may be mounted; and (b) an extension part which may be removably attached to the first part of the mounting bracket such that the second part of the mounting bracket may slide from the first part to, and along, the extension part, thereby extending the distance by which the second part may slide with respect to the first part.
摘要:
A cable seal insert (7) for sealing a cable entry in a closure, comprising: (a) at least two plates (11, 12), each of which, at least in use, has extending therethrough at least one aperture (15) for a cable; and (b) sealing material (19) located between the plates (11, 12); wherein a peripheral surface (7b) of the seal insert (7) which is substantially parallel to the or each cable aperture (15) is substantially planar, and at least one of the plates is formed from non-elastomeric material.