Patent ID: 8475034

Claim:
A thermally compensated pendulum having a point of rotation, comprising: a first mass A having a corresponding center of mass that extends a first distance a above the point of rotation, wherein the first mass A has a first coefficient of thermal expansion α; a second mass B having a corresponding center of mass that extends a second distance b below the point of rotation, wherein the second mass B has a second coefficient of thermal expansion β; wherein the first coefficient of thermal expansion α is given as: α = bB aA ⁢ ( - a 2 ⁢ A - 2 ⁢ ⁢ aAb + b 2 ⁢ B ) ( a 2 ⁢ A - 2 ⁢ ⁢ aBb - b 2 ⁢ B ) ⁢ β .