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A Siebe Gorman lock
helmet with a close up of the breastplate badge. |
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The No bolt
helmet is also referred to as the ''Lock'' helmet. Like the 3 bolt version,
this dress has a small opening and it could take 3 tenders to keep the
collar open whilst the diver gets inside the suit. The dress is clamped
between the bonnet and there breastplate. The lower rim of the corselet
rests freely on the outside of the dress. The helmet is hinged at the back
to the breastplate and clamped at the front with a locking device which
creates a watertight seal. This device was also used by a French helmet
maker, Rene Piel as seen in the adjacent picture. For pictures of a French
no bolt helmet please visit the French
section The Siebe
Gorman helmet has 4 lights and could be fitted with the metal cross bars if
required. The catalogue code name was 'Conen' and the matching suit was
catalo code name 'Erfar' The price for the helmet and suit when bought new
in the 1930 s was around £50 .00
Siebe Gorman No bolt helmet or
'Lock' Helmet
Photos courtesy of David Dekker
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Front
and back view or a Siebe Gorman Lock helmet with some different
features to the one above.
The connection on the crown of the helmet is for the acoustic
telephone device.
Photo by Diving Heritage
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