US87751A

US87751A - bachelder

Info

Publication number: US87751A
Authority: US
Publication date: 1869-03-16
Anticipated expiration: 1886-03-16

Description

@anni iiiw.

.cY-RU s G. BA c HE LD' ER, o F c AMDE N, MA1-NE. Letters Pat-fmt No. 87,751, dated March 16, 1869; antedated March 9, 1869.

Tc all perscnawwhbmlthese presents may come B e it known that I, Gnus G. BACHELDER, of Cain'v l fully described in the following specification, and represented inthe accompanying drawings, of' which- Figure 1 is a top view,

Figure 2, a side elevation,

Figure 3, a longitudinal sectionand Figure 4, a transverse section of it.

The common rail-checks or rope-guides, when made wholly of iron, soon'7 by exposure to the water and air, become oxidated, or rustcd on the surface against which the rope runs when they are in use. This oxidation, or rusting of the surface, not only. wears, but soils the rope.

In making my improved chock, 1 form its body, A, of cast or wrought-iron, andwith a dovetailed recess, B, between its jawsa a, and extending from near the end of one to near the end of the other.

The said recess I fill with amass, O, of zinc, or some metal or composition'of metals not liable to easily oxidate. Against the outer surface of the mass of zinc the rope is to run when'the chock is in use, and fixed on the rail'of a vessel. The zinc will always keep a smooth surface, which will prevent wear and soiling of the rope.

The said dovetailed recess, however, besides being lovetailed,.or formed with inclined surfaces at its ends and sides, in manner as represented, is arched or made convex horizontally on theA inner side of each of the horns or branches of the chock. This arching of the recess causes t-he lining-inetal, when cast in it, to he concave on .the surfaces which are in contact with the arched parts. 'The convexities of the horns and the concavities of the lining operate to hold the lining in connection withthe horns, and prevent it from being tornvo'ut-by the great friction to which it is often subjected from a rope while the chock may be in use. The greatest portion of the strain Aof the rope will be borne by the concav'ities of' the lining and the convexities cf. the horns, and thus the ends and sides of the recess will have but little of the strain to bear, their inclinations operating to hold the edges of the lining from being forced out of place.

I do not therefore claimlining a-journal-box or other article with a stratum of soft metal, arranged or cast ina recess made in the box, as this is the well-,known mode of Babbitting an article.

What I claim, in the improved soft-metal lined railchock, -is- 'The lining and its receiving-recess, as formed with dovetails, and with convexities and concavities, arranged in manner as specified.

OYRUS G. BAOHELDER. Witnesses:

R. H. EDDY,

F. P. HALE, Jr.