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US 4,398,351 AGranted
Thread lead gauge
AssigneeRaines Tool Company
InventorMerlyn J. Patrick
Life of this patent
Estimating the term…
Abstract
Disclosed is a thread lead gauge which includes a tubular barrel, a handle connected to the barrel, and a dial indicator connected to the handle and having a stem extending into the barrel. A single fixed bearing pin extends from the barrel and a single axially movable point is positioned spaced apart from and in line with the fixed point. A spring is provided for biasing the movable point away from the fixed point. The dial indicator indicates the position of the movable point with respect to the fixed point.
Claims12
A thread lead gauge, which comprises:
- a tubular barrel, said barrel including a first axially extending slot and a second axially extending slot spaced axially apart from and colinear with said first a axially extending slot;
- a first piston slidingly mounted in said barrel for movement within said barrel adjacent said first slot;
- a first bearing pin connected to said first piston and projecting through said first slot perpendicular to the axis of said barrel;
- means for fixing the axial position of said first piston, thereby to fix the axial position of said first bearing pin;
- a second piston slidingly mounted within said barrel for movement adjacent said second slot;
- a second bearing pin connected to said second piston and projecting through said second slot perpendicular to said barrel;
- means for biasing said second piston axially away from said first piston;
- a dial indicator having a stem mounted coaxial with said barrel, said stem including an axially movable plunger having a tip contacting said second piston;
- and a hand grip connected to said barrel.
6 more elements
Dependencies are inferred from the claim text.