Wash Bottle: a Laboratory Wash Bottle with a Slit Valve (Boy Mechanic, 1915)

A wide-mouthed bottle with a three-tube stopper that squirts a steady stream of water for rinsing glassware and washing precipitates. Blow into one tube to pressurise it; a slit rubber valve holds the pressure, and your thumb on a relief tube starts and stops the jet at once. Source: The Boy Mechanic, Book 2 (1915), p. 458. Unknown: sizes. Picture: the book's sketch.

مبتدئ

Unknown

التعليمات

Bore the stopper

Fit a stopper to a large-mouthed bottle and bore three holes through it for the tubes.

المواد لهذه الخطوة:

زجاجة زجاج شفّاف1 large mouth

سدادات مطاطية1 قطعة

الأدوات المطلوبة:

ثاقب الفلّين

Make the tubes

Use brass or glass tubes. Bend the nozzle tube E so it reaches the bottom and points out over the side (sketch); the air tube A and relief tube D only pass through the stopper.

المواد لهذه الخطوة:

أنبوب زجاجي3 قطع

الأدوات المطلوبة:

شعلة نفخ زجاج طاولية

Fit the slit valve

On the lower end of air tube A fit a thick piece of rubber tubing B, stoppered at its bottom end, and cut a slit C in its side: blown air opens it, and it closes again to hold the pressure. Push the three tubes through the stopper and fit it in the bottle. To use: fill with water, blow into A, then close D with your thumb; water jets steadily from E and stops the moment the thumb lifts.

المواد لهذه الخطوة: