US110459A - Improvement in canal-lock mechanisms - Google Patents

Description

GEORGE HEAT-H, OF ANNAPO'LIS, MARYLAND.

Letters Patent No. 110,459, 'datedDecember 27,1870.

iMPROVEMENT IN CANAL-LOCK MECHANISMS.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern.

Beit known that I, GEORGE HEATH, of Annapolis, in the county of Anne Arundel and State of Maryf land, have invented a new and improved Valve Mechanism for Canal Locks; and I do hereby declarethat the following is a full, clear,'and exact description thereof, reference being had to the accompanying drawing making part oi' this specification, in which- Figure 1is a cross-section ihrougha canal-lock valve, showing the improved mechanism for operating it.

Figure 2 is a View of the v'ertically-iiiovable rod,y

having a rack applied to its upper part.

Figures 3 and 4 are, respectively, top and sideviews, showing the manner of guiding and operating the vertical rod.

' Similar letters of reference indicate corresponding parts in the several figures.

This invention relates to improvements of mechanism for operating canal-lock -valves.

Ihe nature of my invention consists in a hollow rack, fitted and conned by a nut or stop upon the reduced portion of the vvertical rod which forms a part of the mechanism employed for opening aud closing the valves of a canal-lock gate.

The` object of my improvement is to relieve the rack of strain other .than that which results from compression.

To enable others skilled in the art to understand my invention, I will ldescribe its construction and operation.

In the .accompanying drawing- A represents a wrought-metal rod, the upper portion of which is reduced in diameter and passes through a holemadelocgitudinally through a cast-metal toothed rack, a.

By means of the nut a', on the upper end of th rod A, the rack is secured iirmlyiu place on this rod.

B is a pltma-n or link, which connects the lower end ofthe rod A to'one ofthe arms g of'an oscillating crab or lever G, the other arm ot' which is connected to a rod, C, which is pivoted to a lug, 1,'ou the valve D, as shown in iig. l.

The crab G is applied on a shaft, J, which is supported by a bearing, J'.

At b the lower part of rod A is guided by a bracket or staple, and above this guide l1 rod A passes through a sill-beam on top of thecanal-wall, and rises above thelatter alongside of a standard-bearing, N.

This bearing N is permanently secured down to the sill-beam, and alfords support lto the shaft of a toothed segment, lt, andan anti-friction wheel, a, between which the rack a- 0,11 rod Ais held and guided, as shown in figs. 3 and f1.

'lo the toothed segmentl It a hand-lever, L, is secured, by vibrating which the rod A will be moved vertically up and down and valve D Opened and shut.

It will be seen that by my mode ot' applying lthe rack a to the rod A, thc only strain which this rack will be subjected to will be that-of compression, which will not be liable to break this rack, even when it is subjected t0 very rough use.

I do not claim Linder this application valves which are applied to a horizontal platform; nor do I claim the crab G, as this device is described in au application for Letters Patent marked case A, and bearing even date with the filing of this.

lVhat I claim as new, and desire to secure by Leittcrs Patent, is-

The hollow rack a, iitted and confined by a uutor stop up'on the reduced portion of a vertical rod A, which serves asv part of -the mechanism for opening and closing canal-lock valves, substantially as mulfor the purpose described. 4

' GEO. HEATH.

Witnesses:

J. N. CAMPBELL, EDM. F. BROWN.

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