Grandpa invented

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Has anybody head of "the Hull hook"?
I have been told this was a type of quick release on the davits of lifeboats and was invented circa 1910 - 20.
any help would be welcome, thank you.

[nanny jan]

The RNLI might be able to help:  https://rnli.org/

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thank you.

[Spidermonkey]

I wonder if he took out a patent on it?  It might be worth having a search here https://worldwide.espacenet.com/advancedSearch?locale=en_EP for his name etc.

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fantastic. Not only have I found what I wanted, but I have also found others I was searching for.
Thank you Spidermonkey.