Fig. 55.—Airostyle Type "Record" with Union for Continuous Supply.
A.—Small Pressure Bowl.
B.—Small Simple Bowl.
If a wide spray is required the nozzle 8 is unscrewed to a small extent and then locked by means of a small ring 8a, but if a narrow spray is wished for, the nozzle 8 is screwed on farther and locked in position. On all-round work one position serves, that is, a position in which the recessed point of the nozzle coincides with the end of the tip 9, which just allows the needle 5 to project through it. If it should happen that a leakage of colour occurs through 9 when spraying is suspended, this may be obviated by giving an increased tension to spring 15 which may be obtained by screwing in the spring box 16 slightly. It may happen that some foreign matter becomes lodged in 9, in which case the pistol from the colour tube must be first disconnected, the nose 4 removed and the parts brushed or swilled with turps or spirit. This having been effected, the nose 4 will be replaced, care being taken that the washer 3 beds down on its seating in the body of the pistol.
Fig. 56.—Airostyle Type "Ultra."
It is well to provide for any possible contingencies which may arise, and it may, therefore, be remarked that if any leakage of air occurs through the air valve 19, it will probably be caused by some grit to be found on the face of air valve washer 20, and to remove this the handle can be taken off by unscrewing the milled nut 25 and the valve body 23 in order to get to the air valve. The replacement of the parts is simple.
The adjustment of the pistol for working is made as follows:—First release the screw 14 on cross head 13, and while the instrument is connected up with the air supply, slightly withdraw the trigger 12, allowing a small amount of air to pass through the nozzle. While maintaining the trigger in this position, move the cross head along the needle until it just bears against the cam 10, and in this position clamp the same by screwing home the clamping screw 14.
Fig. 57.—The Airostyle Pistol "M."