Sur′face-gage.
An implement for testing the accuracy of plane surfaces. In that illustrated (Fig. 6079), the pointer P C slides in the sleeve H, which is capable of movement in a vertical plane by having a projection loosely fitting in a cavity at the end of a compound shaft attached to the collar E, that may be raised or lowered upon the upright rod B. By means of a thumbscrew D the collar E is tightly held against the rod B, and the pointer clamped in the sleeve H, at any positions to which they may have been previously adjusted. |
| Surface-joints. |
