The pneumatic player, the regulation and repair of some modern types . al tubes, for in-stance, situated immediately beneath the spoolbox and marked (F) in the accompanying tubes are held in place by three screws, theupper gripping a slot, and the tw^o smaller screwsholding the low^er end to the manual loosening the upper and withdrawing the lowerscrews, w^e can slide the tube down and the lower flange are two air channels:the lower is the channel from tracker bar topouch, and the higher is the bleed hole. This iswhere trouble most frequently occurs. Dust
The pneumatic player, the regulation and repair of some modern types . al tubes, for in-stance, situated immediately beneath the spoolbox and marked (F) in the accompanying tubes are held in place by three screws, theupper gripping a slot, and the tw^o smaller screwsholding the low^er end to the manual loosening the upper and withdrawing the lowerscrews, w^e can slide the tube down and the lower flange are two air channels:the lower is the channel from tracker bar topouch, and the higher is the bleed hole. This iswhere trouble most frequently occurs. Dust andpaper fibre accumulate in time, affecting the rapiddeflation of the pouch. But here we have a de-tachable tube which, when removed, gives us im-mediate access to the bleed hole, and therebydoes aw^ay with the necessity of unscrewing pouchboards covering the whole valve action. This is THE HIGEL ACTION 13 a great advantage, for in the majority of cases itis the bleed hole, and nothing but the bleed hole,that is responsible for the crimes of a playeraction. sc^cijs. Higel Valve and Pneumatic. (A) Metal exhaust chamber. (B) Pouch. (C) Valve. (D) Pneumatic. (E) Bleed hole. (F) Detachable metal tube. (G) Upper valve seat. The pneumatics of the Higel player are detach-able, and are each held in position by fourscrews to a metal air chest (A, see sketch). Thispneumatic block is composed of light metal, andwhen detached can be taken to pieces by with-drawing the few screws attaching the metal plateto the wooden pneumatic. One of the advantagesof the detachable pneumatic is that, should a 14 THE PNEUMATIC PLAYER central note defy all the tuners or mechanicsefforts to correct its behaviour, it can be replacedby one from the extreme treble or bass pro tempore,and taken to the factory for repair. I do not ad-vocate this course, however, for I am decidedly ofopinion that all small repairs should be done onthe spot, and the necessary materials—glue, pouchleather, rubber tubing, &c.—be
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Keywords: ., bookcentury1900, bookdecade1920, bookidpneumaticpla, bookyear1921
