Patent Model - Improvement in Pressure-Gages
Maker and role
Richard Blake, Patentee
May 30 1871
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3 x 7 1/2" (7.6 x 19.1cm)
Blake's patent "relates to the class of gages which employs an elastic metallic diaphragm to produce the motion of the dial-finger; and it consists, first, in a peculiar construction and combination of the gaskets and follower for making the steam-joint between the diaphragm and case, by which a perfect steam-joint is secured and a solid metallic bearing provided for the diaphragm to press against..." (Patent Number 115,420)
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