US41839A - Improvement in rendering compasses insensible to local attraction - Google Patents
Improvement in rendering compasses insensible to local attraction Download PDFInfo
- Publication number
- US41839A US41839A US41839DA US41839A US 41839 A US41839 A US 41839A US 41839D A US41839D A US 41839DA US 41839 A US41839 A US 41839A
- Authority
- US
- United States
- Prior art keywords
- compasses
- insensible
- rendering
- improvement
- compass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000009877 rendering Methods 0.000 title description 6
- 230000005611 electricity Effects 0.000 description 12
- 238000010276 construction Methods 0.000 description 6
- 239000000899 Gutta-Percha Substances 0.000 description 4
- 229920000588 Gutta-percha Polymers 0.000 description 4
- 240000000342 Palaquium gutta Species 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000036633 rest Effects 0.000 description 2
- 230000000717 retained Effects 0.000 description 2
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
- G01C17/38—Testing, calibrating, or compensating of compasses
Definitions
- FIG. 1 is a perspective view
- Fig. 2 a side elevation with part of the binnacle-frame removed
- Fig. 3 a vertical section
- Fig.4a birds-eye view with the cover removed, all of a binnacle and compass for use at sea, and with a conical-shaped compass-box.
- Fig. 5 is a side elevation with part of the binnacleframe removed
- Fig. 6 is a vertical section
- FIG. 7 is a birds-eye view with the cover removed,all of a binnacle and compass for use at sea, the ordinary compass-box being encircled by and attached to a semispheroidal shaped dish, which latter supports the pin on which the needle and card are balanced.
- a represents the binnacle; b,the compass-bow; c,the steclpin for carrying the needle d and card c;
- rIhe insulated wires are here shown to be two in number; but oneonly or any larger number may be employed. Atj they are connected, after sufficient slack has been left for free movement of the compass, to and communicate with the battery k, (shown as of the ordinary sulphate77 description,) although any other kind of battery or means of maintaining a continuous current of electricity would answer the same purpose 5 Z, the glass cover.
- m shows a protectiu g cover or hood, ot' gutta-percha or other material, preferably impervious to moisture.
- a represents the bin nacle; b', thev compass-bow; c', the needlecarrier; d', the needle; e', the card; j", the compass-box, such as is at present in use, and to which is here shown attached the semi-spheroidal shaped dish or vessel g', that both of them may be carried on or by the gimbals t; t', the glass cover; j', the projecting pins; 7c', the insulated circuit wire orwires or communicator or communicators of the electricity generated in the battery l', and connected by the screws m; n', thel gutta-percha or other protecting-hood.
- Patent Agent 4. Clayton Square, Liverpool..
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Treatment Devices (AREA)
Description
. ZSheets-Sheet GVISBORNF. & SIMPSON.
Compass.
No. 41.839. Patented March 8, 1864.
Fiff
8 5 a I Y c l I Il, hlt.'
\\:lll l @i l l a' l fW/ -ff C5 L c v lY/TNFJJ'JJ 2 Shets--Sheet 2. GlsBoRNE a; SIMPsoN.
' N. PETERS, Phumumngmphur, waehinghn. D. c,
Unirse @rares l Fatemi Ormes.
JNO. S. GISBORNE, OF BIRKENHEAD, AND WILLIAM SIMPSON, OF LIVER- POOL, ENGLAND.
IMPROVEMENT vIN RENDERING COll/IPASSES INSENSIBLE T0 LOCAL ATTRACTION.
Spccilication forming parut of Letters Patent No. ILSSB, dated March 8, 1864.
To all whom it may concern:
Be it known that we, JOHN SAGHEVERELL GISBORNE, of Birkenhead, in the county ot' Chester, telegraphic engineer, and WILLIAM SIMPSON, of Liverpoool, in the county of Lancaster, gentleman, both in that part of the United Kingdom of Great Britain and Ireland called England, have invented a new and useful Improvement in Means for Rendering Ships7 and other Compasses Insensible to Local Attraction and We do hereby declare that the following is a full and exact description of the construction and operation thereof', reference being had to the accompanying sheet of drawings, making a part ot' this specification, and to the letters of reference thereon-thatis to say Our invention consists of the use or employment of electricity to render insensible to local attraction or to overcome or counterchcck the local intluences which have so often and so seriously affected the magnetic needles ortheir equivalents in mariners7 compasses; and although our said invention is more particularly serviceable in compasses to be used on board ship, it is not exclusively so applicable, las it may advantageouslyform part of or be usedin connection with compasses to be elsewhere employed.
'Ihe best mode or arrangement with which we are acquainted for carrying our saidinvention of the use or employment of electricity for the purpose above named into effect consists in passing a current of electricity from au ordinary battery through a coil of insulated copper wire wound around a hollow conical or semi-spheroidal compass-box, or wound around a hollow conical or semi-spheroidal shaped dish encircling the compass-box. In either of these arrangements the magnetic or compass needle rests on a center point in' the usual way at a short distance below ahorif zontal line drawn acrossthe terminationof the said coil and below the mouth or termination of the conical or semi-spheroidal shaped box or dish, the leading features of construction of the compasses at present in use being retained.
hcreinbcfore mentioned, and in doing so reterence will bc made to the illustrative sheet ot' drawings herewith, in whichp Figure I is a perspective view, Fig. 2 a side elevation with part of the binnacle-frame removed, Fig. 3 a vertical section, and Fig.4a birds-eye view with the cover removed, all of a binnacle and compass for use at sea, and with a conical-shaped compass-box. Fig. 5 is a side elevation with part of the binnacleframe removed, Fig. 6 is a vertical section, and Fig. 7 is a birds-eye view with the cover removed,all of a binnacle and compass for use at sea, the ordinary compass-box being encircled by and attached to a semispheroidal shaped dish, which latter supports the pin on which the needle and card are balanced.
In Figs. It, 2, 3, and 4 the same letters of reference denote the `same parts. a, represents the binnacle; b,the compass-bow; c,the steclpin for carrying the needle d and card c;
j', the compass-box, made of sheet-copper or other vmaterial into the conical shape shown,
and supported on gimbals g, as in ordinary pass box or cone f. rIhe insulated wires are here shown to be two in number; but oneonly or any larger number may be employed. Atj they are connected, after sufficient slack has been left for free movement of the compass, to and communicate with the battery k, (shown as of the ordinary sulphate77 description,) although any other kind of battery or means of maintaining a continuous current of electricity would answer the same purpose 5 Z, the glass cover. m shows a protectiu g cover or hood, ot' gutta-percha or other material, preferably impervious to moisture.
In Figs. 5, 6, and 7 like letters of reference denote the same parts. a represents the bin nacle; b', thev compass-bow; c', the needlecarrier; d', the needle; e', the card; j", the compass-box, such as is at present in use, and to which is here shown attached the semi-spheroidal shaped dish or vessel g', that both of them may be carried on or by the gimbals t; t', the glass cover; j', the projecting pins; 7c', the insulated circuit wire orwires or communicator or communicators of the electricity generated in the battery l', and connected by the screws m; n', thel gutta-percha or other protecting-hood.
To arrange or set either of the apparatus above described for use, it is only necessary to connect the wires to the battery, when, if the insulation is good, a continuons cnrrentof electricity passes from one pole of the battery to the other through the coil, and in so doing the effect is to counteract practically all local attraction of the magnetic needle in ships and other compasscs.
Having now described the nature of our said invention and the best construction orarran gement of parts with which we are acquainted for carrying the same into eii'ect, We would have it understood that we do not confine ourselves to the use or employment of the apparatus herein described, nor tothe use or em gloyment of any particular-*kind of apparatus;
Before us- J oI-IN THOMSON KING, Patent Agent, 4. Clayton Square, Liverpool..
J oHN DAVrEs, Clark to the said John Thomson King.
Publications (1)
Publication Number | Publication Date |
---|---|
US41839A true US41839A (en) | 1864-03-08 |
Family
ID=2111407
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US41839D Expired - Lifetime US41839A (en) | Improvement in rendering compasses insensible to local attraction |
Country Status (1)
Country | Link |
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US (1) | US41839A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2443595A (en) * | 1943-01-22 | 1948-06-22 | Sperry Corp | Deviation correcting means for magnetic devices |
US2697186A (en) * | 1944-07-31 | 1954-12-14 | Wilmer C Anderson | Compensator for induced magnetic fields |
US2834939A (en) * | 1944-07-31 | 1958-05-13 | Walter E Tolles | Compensation of induced magnetic fields |
-
0
- US US41839D patent/US41839A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2443595A (en) * | 1943-01-22 | 1948-06-22 | Sperry Corp | Deviation correcting means for magnetic devices |
US2697186A (en) * | 1944-07-31 | 1954-12-14 | Wilmer C Anderson | Compensator for induced magnetic fields |
US2834939A (en) * | 1944-07-31 | 1958-05-13 | Walter E Tolles | Compensation of induced magnetic fields |
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