Mouth gag

1900-1999

Mouth gag invented by Croft

1870-1900

Gag mouth Doyen's

1870-1935

Screw-shaped mouth gag, Europe, 1880-1920

1880-1920

Modified Sydenham mouth gag

1939-1945

Mouth speculum (gag)

Electro-Convulsive Therapy mouth gags

1950-1990

Mouth gag, Mason's with Ackland's parallel blades

1900-1935

Mouth Gag

Fergusson's mouth gag

1920-1950

Mouth gag

1860-1900

Davis Boyle's mouth gag with 2 tongue depressors (anaesthetic tubes attached) by Down Bros. Ltd.

1939-1945

Fergusson-type anaesthetic mouth gag with Ackland tooth plates

1904-1935