Locking mechanisms

Details Locking mechanisms Locking mechanisms

1990-10-02

1991-12-24

Will, Thomas B.

Joints and connections

Thimble: screw or cam

403320, 192 56R, F16B 718, F16D 100

Patent

active

050747037

ABSTRACT:
A pyrometer has a lock nut that engages a threaded sighting tube. The lock nut encloses a ratchet mechanism formed by two coaxial collars with inclined ratchet teeth at their ends. The teeth are urged together by a helical spring, one of the collars being prevented from rotation relative to the nut by means of a pin that engages a slot in the collar. The other collar has an annular face which is urged by a disc spring against a washer locked with the body of the pyrometer so as to form a friction clutch. The ratchet allows the nut to be tightened but it can only be untightened by overcoming the friction of the clutch.

REFERENCES:
patent: 903435 (1908-11-01), Barrott
patent: 915735 (1909-03-01), Brown
patent: 1677199 (1928-07-01), Nelson
patent: 1796506 (1931-03-01), Conner
patent: 4582444 (1986-04-01), Miskinis
patent: 4642837 (1987-02-01), Nichols et al.

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