Apparatus for location relatively to a subject's cephalic axis
Abstract
Abstract A HEAD CLAMP OR FACE BOW, HAVING A PAIR OF COAXIAL EAR PLUGS WHICH ARE ARRANGED TO BE INSERTED INTO A SUBJECT''S OUTER EARS TO LOCATE THE SUBJECT''S CEPHALIC AXIS RELATIVELY TO THE APPARATUS. THE EAR PLUGS ARE MOVABLE TO WARDS AND AWAY FROM ONE ANOTHER TO ACCOMMODATE HEADS OF DIFFERENT SIZE WHILST MAINTAINING THE PLUGS EQUIDISTANT FROM A CENTRAL REFERENCE IN THE APPARATUS. A SENSING DEVICE IS INTERPOSED BETWEEN EACH EAR PLUG AND A PART OF THE APPARATUS WHICH IS REQUIRED TO BE LOCATED IN USE RELATIVELY TO THE SUBJECT''S CEPHALIC AXIS. THE SENSING DEVICES RESPONDING IN USE TO THE REACTION BETWEEN THE SUBJECT''S OUTER EARS AND THE CORRESPONDING EAR PLUGS AND MEANS ARE PROVIDED WHEREBY THE RESPONSES OF THE TWO SENSING DEVICES MAY BE COMPARED SO THAT THE SUBJECT''S HEAD MAY BE ADJUSTED UNTIL THE REACTION BETWEEN THE SUBJECT''S OUTER EARS AND THE TWO EAR PLUGS ARE EQUAL.
Inventors
- 👤 Graham Peter Rabey
Bibliographic Details
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |