Differential nonmetals thickness gauge
AssigneeThe Boeing Company
InventorsLeroy R. Hause, Dean Y. Tsuchida
Life of this patent
Estimating the term…
Abstract
A gauge for measuring the thickness of a nonmetallic article employs differential air core transformer principles. A transmitting coil is axially aligned between two identical receiving coils. The test article is positioned between the transmitting coil and a first one of the receiving coils. The distance between the second receiving coil and the transmitting coil is adjusted until the signals received by the two receiving coils are balanced. The distance between the second receiving coil and the transmitting coil then corresponds identically to the distance between the transmitting coil and the first receiving coil. Direct reading measurement devices may be provided.
Claims7
A gauge for determining the thickness of a nonmetallic article comprising:
- an AC signal generator;
- a transmitting coil connected to said generator;
- a first receiving coil and a duplicate receiving coil, each axially aligned with said transmitter coil on opposite sides thereof and each adapted to receive AC signals therefrom;
- means for delivering AC signals from said first receiving coil and from said duplicate receiving coil to a comparison means:
- a first means extending from said first receiving coil for engaging one surface of an article whose thickness is to be determined;
- a second means extending from said transmitting coil for engaging the opposed surface of the said article;
- linearly adjustable mounting means between said duplicate receiving coil and said transmitting coil;
- means for measuring the length of said adjustable mounting means.
Dependencies are inferred from the claim text.