US3832787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic compass mounting
Assignee: Arthur D Little Inc
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Filing: 1973-08-20
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Granted: 1974-09-03
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Expires: 1993-08-20
Abstract
Abstract A magnetic compass mounting operative for installation of the compass on either bottom or top mounting surfaces and including compensating magnets to offset the effects of magnetic deviation and a rotational adjustment for calibrated positioning of the compass such as for magnetic variation correction.
Inventors
- 👤 J Fowler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:03
CPC Classifications
G; G01; G01C; G01C17/00; G01C17/38
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
210 words
A compass mounting comprising: a spherical enclosure containing a remote reading magnetic compass and including a circumferential flange, said flange having upper and lower opposite facing surfaces, each containing a fiducial mark at a common angular position; a cylindrical housing having a mounting flange on one end thereof adapted for attachment to a bottom or top mounting surface; an annular flange disposed near the end of said housing opposite said mounting flange and arranged for rotation with respect to said cylindrical housing; means for securing said circumferential flange to said annular flange for rotation as a unit, said circumferential flange being securable with either facing surface visible in accordance with the mounting position of said housing; a circumferentially extending plate integrally formed with said annular flange and disposed in confronting relation with a portion of the inner wall of said cylindrical housing and having an elongated circumferentially extending slot therein; means on said housing cooperative with said slot for securing said compass enclosure in predetermined angular disposition with respect to said housing; said housing having a surface substantially coplanar with the visible facing of said circumferential flange and including degree markings thereon cooperative with said fiducial mark for calibrating the rotational disposition of said enclosure with respect to said housing.
Claim 2
Dependent Claim
210 words
A compass mounting comprising: a spherical enclosure containing a remote reading magnetic compass and including a circumferential flange, said flange having upper and lower opposite facing surfaces, each containing a fiducial mark at a common angular position; a cylindrical housing having a mounting flange on one end thereof adapted for attachment to a bottom or top mounting surface; an annular flange disposed near the end of said housing opposite said mounting flange and arranged for rotation with respect to said cylindrical housing; means for securing said circumferential flange to said annular flange for rotation as a unit, said circumferential flange being securable with either facing surface visible in accordance with the mounting position of said housing; a circumferentially extending plate integrally formed with said annular flange and disposed in confronting relation with a portion of the inner wall of said cylindrical housing and having an elongated circumferentially extending slot therein; means on said housing cooperative with said slot for securing said compass enclosure in predetermined angular disposition with respect to said housing; said housing having a surface substantially coplanar with the visible facing of said circumferential flange and including degree markings thereon cooperative with said fiducial mark for calibrating the rotational disposition of said enclosure with respect to said housing.
Claim 3
Dependent Claim
49 words
A compass mounting according to claim 1 wherein said upper facing surface of said circumferential flange is in engagement with said annular flange when said housing is bottom mounted, and said lower facing circumferential flange surface is in engagement with said annular flange when said housing is top mounted.
Claim 4
Dependent Claim
34 words
A compass mounting according to claim 1 wherein said substantially coplanar surface is on a circumferentially extending segment integrally formed with said housing and disposed at the rim thereof adjacent to said visible facing.
Claim 5
Dependent Claim
63 words
A compass mounting according to claim 1 wherein said cylindrical housing includes first and second mounting rods of non-magnetic material, each disposed across a diameter of said housing and in orthogonal disposition to the other; and a plurality of magnets, each disposed at a respective end of a mounting rod and each rotationally adjustable on said rod for providing a compensating magnetic field.
Claim 6
Dependent Claim
37 words
A compass mounting according to claim 4 wherein said cylindrical housing includes first and second pairs of mounting blocks integral with said housing at positions to support said mounting rods respectively across orthogonal diameters of said housing.
Claim 7
Dependent Claim
37 words
A compass mounting according to claim 1 wherein said cylindrical housing includes a groove circumferentially disposed in the inner wall thereof, said annular flange having an outwardly extending lip engageable by said circumferential groove and rotational therein.
Claim 8
Dependent Claim
47 words
A compass mounting according to claim 6 wherein said cylindrical housing mounting flange includes a plurality of circumferentially extending slots therethrough operative to receive fastening means for attachment of said cylindrical housing to a bottom or top mounting surface and to permit rotational adjustment of said housing.
Claim 9
Dependent Claim
34 words
A compass mounting according to claim 6 wherein said spherical enclosure includes a terminal box integral therewith and by which said remote reading magnetic compass is adapted to be electrically coupled to utilization apparatus.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |