the other two sections thereby providing economical maintenance the shorter the hoses in section 60 the less uncoiling space is required in chamber 26 as will become apparent in the following description of the operation this allows stationary housing 20 to have a diameter no larger than the reel flange discs 32 and 33 which provides a compact unit in fig6 carriage 13 is in its lowest position and almost all of external line section 17 is unwound from reel hub 31 which is omitted in these views for clarity substantially all of internal line section 60 is wound in counterclockwise wrap on hub 30 line section 17 is shown in broken lines to distinguish it from line section 60 in fig7 carriage 13 has moved upward approaching the reel unit and in this upward movement spring 40 has rotated the reel counterclockwise to take up slack in line section 17 and wind it on hub 31 fig7 shows carriage 13 midway between its lowest position and the level of the reel unit with approximately half of line section 17 wound on reel hub 31 at this point line section 60 is completely unwound from hub 30 and is disposed in a loop in chamber 26 against the inner periphery of stationary housing.