US177869A - Improvement in mariners compasses - Google Patents
Improvement in mariners compasses Download PDFInfo
- Publication number
- US177869A US177869A US177869DA US177869A US 177869 A US177869 A US 177869A US 177869D A US177869D A US 177869DA US 177869 A US177869 A US 177869A
- Authority
- US
- United States
- Prior art keywords
- needles
- improvement
- shaft
- mariners
- card
- 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
- 210000003746 Feathers Anatomy 0.000 description 12
- 210000003284 Horns Anatomy 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 230000003472 neutralizing Effects 0.000 description 2
- 230000013707 sensory perception of sound Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D43/00—Arrangements or adaptations of instruments
- B64D43/02—Arrangements or adaptations of instruments for indicating aircraft speed or stalling conditions
Definitions
- Fig. 2 is a plan of one-half the card; Fig. 3, a vertical section of the card and of the needles; Fig. 4, a vertical section, on the line 00 y, of the compass, embracing my said improvements, omitting the gimbal.
- Figs. 5 and 6 are, respectively, vertical and horizontal sectional views of the tube 73, shaft h, and friction-rollers around said shaft, on an enlarged scale. section of the feather f.
- Fig.8 is a side elevation of the joint q r s f a, Fig. 1, represents the bowl of the compass; b, the gimbal; 0, Fig. 4, the center-pin, all of which are of ordinary construction. d and e, the horns of the bowl, are tubular.
- f, Fig. 4 is a feather or blade (shown in two positions) connected freely by a stirrup, g, and pivot to a vertical shaft, h, which passes through a tube, '5, extending from the deck j through the bottom of the vessel, marked j, Fig. 4.
- k and 1, Figs. 4, 5, and 6, are friction-rollers surrounding the shaft h at its upper and lower ends.
- rollers have bearin gs in the collars 71. and h respectively.
- the flat faces of the rollers in the collar h travel on the head of the tube 03, their edges being in contact with the curb h.
- the shaft is thus supportedon the tube 6 by means of the collar W.
- m, Figs. 1 and 4 is a short arm rigidly attached to the upper end of the shaft h.
- n, -Fig. 1 is a link connecting the arm m with the lever 0, which is pivoted to a spur, p, proceeding from the binnacle, (a portion of which is shown in section.)
- the lever o is flexibly attached to one end of the sliding rod q, Fig. 1, which is forked, and which carries the slotted segment 1", the forks of said rod embracing the gimbal-pin, all as shown in Figs. 1 and 8.
- s, Fig. 1, is a forked sliding rod, which is provided with a spur, t,
- Fig. 7 is a transverse which slides in theslot of the segment 1', the
- the feather at all times corresponds with the course the vessel is making, and governs the nonius, so as to indicate to the mariner the leeway of the vessel.
- the feather is shown by dotted lines in the position it holds when the vessel is not moving.
- the shaft 71 and the feather f may be drawn up into the tube 11, out of the way of danger.
- h and 6 Figs. 3 and 4 are the needles. They are placed at the south side of the card j in line, and, preferably, with a space intervening between them, as shown. The posi tive poles of the needles point directly to the center-pin, and when thus constructed and arranged they are beyond the influence of local attraction.
- any number of such needles so arranged, or a single needle consisting of a single bar, or a single needle composed of anumber of separate thin plates or leaves placed side by side, in the usual way, may be employed, or two or any number of needles, each composed of separate leaves, as last mentioned, (said needles being arranged in line, as aforesaid,) may be employed, provided, in each instance, the needles or needle employed be located directly south'of the center-pin and at right angles to the east and west lineof the card.
Description
v 2SheetsSheet1. J'; MONA-BB.
MARINERS commas. No.177,869. Patented May 23,1876.
F1434. 2 P s s @itnesses A ll arney.
N.FETER5, FHOTO-LITHDGRAFHER. WASHINGTON. D. C
J. MONABB, MARINERS COMPASS.
Patented my 23,1876.
m m m N-PBERS, PHOimLITHOGRAPHER. WASHINGTON. D Q
UNITED STATES PATENT OFFIcE.
JAMES MCNABB, OF WIDDER, CANADA.
IMPROVEMENT m MARINERS COMPA Specification forming ofIZet ters'Patent No. 1 77,869, dated May 23, 1876; application filed February 14,1876.
To all whom it may concern Be it known that I, J AMES MGNABB, of Widder, Lambton county, Ontario, inthe Domin ion of Canada, have invented certain Improvethe card being removed. Fig. 2 is a plan of one-half the card; Fig. 3, a vertical section of the card and of the needles; Fig. 4, a vertical section, on the line 00 y, of the compass, embracing my said improvements, omitting the gimbal. Figs. 5 and 6 are, respectively, vertical and horizontal sectional views of the tube 73, shaft h, and friction-rollers around said shaft, on an enlarged scale. section of the feather f. Fig.8 is a side elevation of the joint q r s f a, Fig. 1, represents the bowl of the compass; b, the gimbal; 0, Fig. 4, the center-pin, all of which are of ordinary construction. d and e, the horns of the bowl, are tubular. f, Fig. 4, is a feather or blade (shown in two positions) connected freely by a stirrup, g, and pivot to a vertical shaft, h, which passes through a tube, '5, extending from the deck j through the bottom of the vessel, marked j, Fig. 4. k and 1, Figs. 4, 5, and 6, are friction-rollers surrounding the shaft h at its upper and lower ends. These rollers have bearin gs in the collars 71. and h respectively. The flat faces of the rollers in the collar h travel on the head of the tube 03, their edges being in contact with the curb h. The shaft is thus supportedon the tube 6 by means of the collar W. m, Figs. 1 and 4, is a short arm rigidly attached to the upper end of the shaft h. n, -Fig. 1, is a link connecting the arm m with the lever 0, which is pivoted to a spur, p, proceeding from the binnacle, (a portion of which is shown in section.)
The lever o is flexibly attached to one end of the sliding rod q, Fig. 1, which is forked, and which carries the slotted segment 1", the forks of said rod embracing the gimbal-pin, all as shown in Figs. 1 and 8. s, Fig. 1, is a forked sliding rod, which is provided with a spur, t,
Fig. 7 is a transverse which slides in theslot of the segment 1', the
joint, with the rod 12, Figs. 1 and 4, which slides through the tubular horn e of the bowl, and is attached, at its inner end, by a swivel, to
the frame w, which, by a link, a, is attached" to the nonius-frame b which swings upon the center-pin by sleeves c and d, Fig. 4. e and f, Fig. 1, are the gimbal-horns, which have hearings in the binnacle, as usual.
The system of levers and connections above described are necessary to convey the motion communicated by the feather f of the shaft h to the nonius 9 without communicating to the compass any motion due to the motion of the vessel.
The feather at all times corresponds with the course the vessel is making, and governs the nonius, so as to indicate to the mariner the leeway of the vessel. The feather is shown by dotted lines in the position it holds when the vessel is not moving. When necessary, on account of the shallowness of the water, or for any other reason, the shaft 71 and the feather f may be drawn up into the tube 11, out of the way of danger.
h and 6, Figs. 3 and 4, are the needles. They are placed at the south side of the card j in line, and, preferably, with a space intervening between them, as shown. The posi tive poles of the needles point directly to the center-pin, and when thus constructed and arranged they are beyond the influence of local attraction.
Instead of employing two needles arranged in line, (each needle consisting of a single bar, as set forth,) any number of such needles so arranged, or a single needle consisting of a single bar, or a single needle composed of anumber of separate thin plates or leaves placed side by side, in the usual way, may be employed, or two or any number of needles, each composed of separate leaves, as last mentioned, (said needles being arranged in line, as aforesaid,) may be employed, provided, in each instance, the needles or needle employed be located directly south'of the center-pin and at right angles to the east and west lineof the card.
and show her true course, substantially as set forth.
2. The combination, with the card, of one or more magnetic-needles arranged south of the center-pin, and at right angles to the east and west line of the card, for the purpose of neutralizing the influence of local attraction, substantially asset forth.
JAMES MCNABB.
Witnesses:
H. F. HOWELL, THos. A. BARTT.
Publications (1)
Publication Number | Publication Date |
---|---|
US177869A true US177869A (en) | 1876-05-23 |
Family
ID=2247276
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US177869D Expired - Lifetime US177869A (en) | Improvement in mariners compasses |
Country Status (1)
Country | Link |
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US (1) | US177869A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3475957A (en) * | 1966-02-14 | 1969-11-04 | Zaklady Mekh Precyzyjnei Przed | Submarine navigation device for a self-dependent diver |
-
0
- US US177869D patent/US177869A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3475957A (en) * | 1966-02-14 | 1969-11-04 | Zaklady Mekh Precyzyjnei Przed | Submarine navigation device for a self-dependent diver |
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