초록 ▼

Apparatus for adjusting a first member relative to a second member comprises a button with two sets of teeth and movable between first and second positions. When in the first position, both sets of teeth engage sets of teeth carried by the first and second members to prevent relative movement of the

Apparatus for adjusting a first member relative to a second member comprises a button with two sets of teeth and movable between first and second positions. When in the first position, both sets of teeth engage sets of teeth carried by the first and second members to prevent relative movement of the first and second members. When in the second position, one of the sets of teeth carried by the button disengages one of the sets of teeth carried by one of the first and second members to allow relative movement thereof.

대표청구항 ▼

[ What is claimed is:] [1.] Apparatus for adjusting a first member relative to a second member, comprising:first and second axially-spaced buttons wherein the first button has first and second sets of axially-spaced teeth and the second button has third and fourth sets of axially-spaced teeth; fifth

[ What is claimed is:] [1.] Apparatus for adjusting a first member relative to a second member, comprising:first and second axially-spaced buttons wherein the first button has first and second sets of axially-spaced teeth and the second button has third and fourth sets of axially-spaced teeth; fifth and sixth sets of teeth carried by the first member and seventh and eighth sets of teeth carried by the second member;wherein the buttons are movable between a first position at which the first and second sets of teeth engage the fifth and seventh sets of teeth, respectively, and the third and fourth sets of teeth engage the sixth and eighth sets of teeth, respectively, to prevent relative movement of the first and second members and a second position at which the first set of teeth are disengaged from the fifth set of teeth and the third set of teeth are disengaged from the sixth set of teeth to allow relative movement of the first and second members.