Angle measuring device

Claim 1

A device for measuring and setting angles comprising A. a frame including a fixed support; B. a horizontally disposed scale of rectilinear shape affixed to the frame below the fixed support; C. an arm connected by a pivot pin to the fixed support, said arm having a longitudinal axis and being pivotable from a first position which is vertical to a second position, which is angularly offset from the vertical, through an angle to be measured, D. an indicating means mounted for movement adjacent the scale, 1. the indicating means comprising a sliding member mounted for sliding movement, a pointer connected to the sliding member and overlying the scale, and an interconnecting pin being fixedly connected to the sliding member; E. interconnection means for connecting said indicating means to said arm, said interconnection means comprising, 1. a longitudinally extending slot in said arm, a. said slot being tapered in a direction away from the pivot pin, 2. the interconnecting pin extending into said slot, a. the portion of said interconnecting pin which extends into the slot having opposed edges that engage opposed longitudinally extending walls of the slot throughout the entire movement of the arm from the first position to the second position, F. angle setting means for pivoting said arm both clockwise and counterclockwise, 1. said angle setting means comprising a chain and a pair of spaced, freely rotatable sprockets mounted on said frame, said chain being disposed in a loop about the sprockets, a. said chain having opposed ends, connecting means for fastening said opposed ends to opposite sides of the slide member, and means connected to the sprockets for rotating said chain in a clockwise and a counterclockwise direction for traversing the slide in opposite directions to thereby pivot the swinging arm in both clockwise and counterclockwise directions from said first position.

Claim 2

A device for measuring and setting angles comprising A. a frame including a fixed support; B. a horizontally disposed scale of rectilinear shape affixed to the frame below the fixed support; C. an arm connected by a pivot pin to the fixed support, said arm having a longitudinal axis and being pivotable from a first position which is vertical to a second position, which is angularly offset from the vertical, through an angle to be measured, D. an indicating means mounted for movement adjacent the scale, 1. the indicating means comprising a sliding member mounted for sliding movement, a pointer connected to the sliding member and overlying the scale, and an interconnecting pin being fixedly connected to the sliding member; E. interconnection means for connecting said indicating means to said arm, said interconnection means comprising, 1. a longitudinally extending slot in said arm, a. said slot being tapered in a direction away from the pivot pin, 2. the interconnecting pin extending into said slot, a. the portion of said interconnecting pin which extends into the slot having opposed edges that engage opposed longitudinally extending walls of the slot throughout the entire movement of the arm from the first position to the second position, F. angle setting means for pivoting said arm both clockwise and counterclockwise, 1. said angle setting means comprising a chain and a pair of spaced, freely rotatable sprockets mounted on said frame, said chain being disposed in a loop about the sprockets, a. said chain having opposed ends, connecting means for fastening said opposed ends to opposite sides of the slide member, and means connected to the sprockets for rotating said chain in a clockwise and a counterclockwise direction for traversing the slide in opposite directions to thereby pivot the swinging arm in both clockwise and counterclockwise directions from said first position.