Abstract

A carpenter square includes a body including a first, second, and third edges. A fence is pivoted to the first edge for movement among first, second, and third positions. In the first and second positions, the fence is normal to the body. In the third position, the fence is coplanar to the body. A hinge assembly pivots the fence to the body and includes a notch in the body, a recess in the notch, and a tab projecting from the fence and fit over the pin for reciprocating and swinging movement. The tab moves between a neutral stance, in which the tab is mis-registered with the recess and disables movement of the fence among the first, second, and third positions, and an advanced stance, in which the tab is registered with the recess and enables movement of the fence among the first, second, and third positions.

IPC Classes  ?

• B43L 7/027 - Plural non-adjustable straightedges fixed at right angles
• B43L 7/12 - Square and pivoting straightedges
• B43L 13/02 - Drafting machines or drawing devices for keeping parallelism
• G01B 3/56 - Gauges for measuring angles or tapers, e.g. conical calipers
• G01C 9/18 - Measuring inclination, e.g. by clinometers, by levels by using liquids
• G01C 15/00 - Surveying instruments or accessories not provided for in groups
• B25H 7/00 - Marking-out or setting-out work
• B43L 12/02 - Means to prevent slippage magnetic