d TylerApr. 6, 1869.
103,694F. WessonMay 31, 1870.
106,083Simpson, Gray, and RomansAug. 2, 1870.
112,803Gray and RomansMar. 21, 1871.
cGray and RomansMar. 21, 1871.
class B. — breech-block moving with relation to barrel.
1. Sliding Longitudinally Backward. (a.) Operated by a Lever.
No.Name.Date.
747 ApplebyDec. 20, 1864.
46,977D. WilliamsonMar. 21, 1865.
48,337Joshua GrayJune 20, 1865.
49,463W. F. Wilson and H. FlatherAug. 15, 1865.
on and SimpsonMar. 13, 1866.
53,543J. RiderMar. 27, 1866.
*54,068J. GrayApr. 17, 1866.
2. (c.) Hinged beneath Barrel, etc.—ContinueW. H. RiceMay 19, 1863.
41,343Mix and HortonJan. 9, 1864.
*41,375J. GrayJan. 26, 1864.
42,139C. B. HoldenMar. 29, 1864.
42,685C. F. PayneMay 10, 1864.
42,743L. N. ChapinMay 17, 1864.
*44,995J. GrayNov. 8, 1864.
*45,105R. WilsonNov. 15, 1864.
*45,560J. GrayDec. 20, 1864.
*4J. GrayDec. 20, 1864.
*45,919W. FitzgeraldJan. 17, 1865.
49,583L. W. BroadwellAug. 22, 1865.
51,243W. TibbalsNov. 28, 1865.
51,258J. DavisNov. 28, 1865.
54,744J.
to bring the needle into coincidence with the meridian at each of the other cardinal points indicated by the cross lines on the deck, and its correctness at each of the four rhumb points, N. E., N. W., S. W., S. E., is assured in like manner, using the boxes of chain before mentioned to correct the deviation of the needle.
When these adjustments are made the compass should be sufficiently correct for all practical purposes.
The deviations, if any, may be ascertained by swinging the ship.
Gray's apparatus for adjusting compasses is based on the foregoing method of Professor Airey.
The regulating magnets are caused to approach or recede from the compass by screws, so as to admit of very accurate adjustment.
Great care must be taken that the magnets are brought, by turning the ship at right angles, to the magnetic meridian before moving them, in order to regulate the compass.
Marine steam-boiler.
Ma-rine′ steam-boil′er.
Marine steam-boilers are composed of an external s
onNov. 25, 1856.
16,387JohnsonJan. 13, 1857.
16,566GrayFeb. 3, 1857.
17,508HarrisJune 9, 1857.
17,571HarrikFeb. 23, 1858.
19,660HendrickMar. 16, 1858.
19,532GrayMar. 2, 1858.
19,665GrayMar. 16, 1858.
20,413DimockGrayMar. 16, 1858.
20,413DimockJune 1, 1858.
20,742ThomsonJune 29, 1858.
21,015MooreJuly 27, 1858.
1.
(b.) Reciprocating Loop-Taker. (c1858.
(Reissue.)706StedmanApr. 26, 1859.
24,022Gray et al.May 17, 1859.
24.629GroutJuly 5, 1859.
25,00erSept. 22, 1868.
88,499McLeanMar. 30, 1869.
95,581GrayOct. 5, 1869.
102,586PeabodyMay.
3, 1870.
105,961Meb. 20, 1872.
123,995JohnstonFeb. 27, 1872.
124,894Gray et al.Mar. 26, 1872.
125,230ToofApr. 2, 1872.
125,neMar. 4, 1873.
8. Chairs.
No.Name.Date.
140,362GrayJuly 1, 1873.
9. Casters.
42,754DodgeMay 17, 1864. latter an exterior nut which covers the joint.
p. Gray.
Two or more pawls within a sleeve are, by means ofhill.
It was originally invented by a Scotchman, a Mr. Gray, and was improved by Smith of Deanston and by Wil