| 摘要 |
In the particular embodiments described in the specification, a dry sprinkle r has a tube-like section with a sprinkler head at one end and a threaded port ion to be received in a water supply line at the opposite end and it includes an inter nal support structure extending between a sealing plug in the end to be received in the water supply line and a cap in the sprinkler head which is supported by a thermall y responsive structure. In one embodiment, the support structure includes a ro d on which the sealing plug is mounted at one end and having a cap-engaging tip at the oppo site end which is shaped to facilitate the flow of water from the sprinkler head towa rd a deflector, the rod being spaced from the tube-like section by two guide memb ers, one of which acts as a stop for motion of the structure toward the sprinkler head a nd the other which engages a spring urging the structure toward the sprinkler head. In other embodiments, a spacer is inserted between the end of the rod and the cap in the sprinkler head and a separate rod tip may be inserted between the rod and th e spacer. In a further embodiment, an inner tube extends between the cap and the sealing pl ug and is shaped with spaced triangular tips to support the sealing plug in the unactu ated condition and a water supply line connection which is coupledto the water su pply line has a lateral cavity recess to receive the sealing plug out of the path of water flowing through the inner tube when the sprinkler is actuated.
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