Floating bath water temperature measuring instrument

Claim 1

A floating apparatus for measuring the temperature of water contained within an open vessel while floating on the surface of the water comprising: casing means with a hemispheric shape, said casing means having a first cavity formed therein, said casing means having at least one passage means through the wall thereof whereby said first cavity means is open to the flow of water, coil means including a first end and a second end disposed within said first cavity and attached at the first end to the wall of said first cavity, shaft means attached to the second end of said coil means, dial plate means disposed in water sealing engagement with the lip of said casing means, lens means disposed in water sealing attachment to the lip of said casing means, a second cavity means formed between said dial means and said lens means whereby said second cavity means is sealed from the flow of water, hollow bearing means connecting said first cavity with said second cavity and configured to receive said shaft means, said shaft means disposed in protruding relation to said hollow bearing means, pointer means disposed in substantially spaced apart parallel relation to said dial plate means and attached to said shaft means, the upper portions of said passage means positioned near the lip of said casing means whereby said passage means at least in part is disposed at the top of said first cavity when said floating apparatus is merged in water, whereby said shaft caused by coiling and uncoiling of said coil means rotates said pointer.