Proto Breathing Apparatus

Advertisement for the 'Proto' Rescue Apparatus (The Colliery Guardian, July 14th 1911)

Schematic Flow Diagram of the PROTO Apparatus

(From 'MINE RESCUE WORK' By R. McAdam and D. Davidson)

1. Oxygen Cylinder

8. Breathing Bag

2. Cylinder neck

9. Cooler

3. Gland

10. Inhalation Valve

4. Rubber Buffer

11. Exhalation Valve

5. Cylinder Valve

12. Relief Valve

6. Feed-gear

13. Mouthpiece

7. Oxygen Supply Tube

14. Nose Clip

15. Pressure Guage

Arthur Clifford demonstrating the PROTO breathing apparatus

My thanks to Ian Pope for the above picture

© Copyright 1999-2006Philip Clifford