Abstract: A chair has a seat mounted on a pedestal with a swivel and tilt function. The pedestal has an inner part and an outer part that are telescopically engaged. The outer part rotates with respect to the inner part. A bracket secures the underside of the seat to the upper end of the outer part. There are a series of holes in the upper end of the outer part. A selectively operable locking member mounts on the bracket. The locking member includes a detent for engaging in one of the holes. A releasing member releases the detent from one of the holes and enables insertion in another hole after rotation of the outer part relative to the inner part. A spring can bias the detent to the engaged position. The seat can neither be swivelled nor tilted when the locking member is in engaged position.

Abstract: The invention relates to apparatus for adjusting the angular position of one member relative to another, comprising means releasably lockably engageable with the one member therefor whereby the means is operable to lock and unlock the one member with respect to the another member. There is a remote actuating means for the means.