| US 7,562,460 B2 | ||
| Gravity gradiometer | ||
| Frank Joachim Van Kann, Nedlands (Australia); and John Winterflood, Nedlands (Australia) | ||
| Assigned to Technological Resources PTY. Ltd., Melbourne, Victoria (US) | ||
| Filed on Aug. 27, 2007, as Appl. No. 11/845,323. | ||
| Claims priority of application No. 2006906560 (AU), filed on Nov. 23, 2006. | ||
| Prior Publication US 2008/0121035 A1, May 29, 2008 | ||
| Int. Cl. G01C 9/14 (2006.01); G01V 7/16 (2006.01) | ||
| U.S. Cl. 33—366.25 [73/382 R] | 8 Claims |
| 1. A gravity gradiometer for measuring components of the gravity gradient tensor, comprising:
a sensor for measuring the components of the gravity gradient tensor, the sensor including super-conducting componentry;
a Dewar in which the sensor is arranged;
a connector for connecting the super-conducting componentry within the Dewar to external equipment outside of the Dewar, the
connector comprising:
a container attached to the Dewar;
a feed through filter in the container for connection to a lead within the Dewar;
a three terminal cap electrically connected to the feed through filter;
a relay electrically connected to the three terminal cap; and
an output terminal on the container for connecting the relay to an external lead,
wherein the feed through filter comprises an inductor connected in parallel to a load, the other side of the load being earthed.
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