US93273A - Improvement in piston-springs - Google Patents

Description

man saut @anni dimite Letters Patent No. 93,273, dated August 3, 1869.

IMPROVEMENT IN PISTON-SPRING-S.

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

T o all whom it may concern lthe piston of a steam-engine.

Similar letters of reference indicate like parts in all the figures.

lhe principal object ofmy invention is to provide a series of springs, to be used with the commonlyused divided packing-rings of a steam-engine piston,

said ringstoV be easy of construction, and etlicient when in place.

This object I accomplish by constructing my improved springs of two separate pieces of at bar or ribbon-steel, the form of which is shown in figs. l, 2, and 3.

The depth of the spring should be a little less than that of the space they are intended to occupy when in place, for if they should fit close up to the follower, they could not work easily, and would, therefore, be metiicient.

' Each spring is constructed of two pieces, separate and distinct from each other, the outer part, A, of the spring fitting against the inside of divided inner ring F, as shown in iig. 3, and the innerhalf, B, of the spring fitting against the hub C of the piston,-as

shown in the same figure.

' Each halfof the spring A and' has a small central semicireula-r curve, seen at c and d in the accompany'- ing drawings, and the outer ends of the springs are curved, as shown ata a and l) b, in rigs. 1,2, and 3.

The points a (t of the halt' A ofthe spring are curved, in order that they may work easily against the inside of inner divided ring F, and the outer ends'lof the inner half B of the spring are curved, as shown in the drawings, in order to prevent them from sliding or overlapping each other, and also, that they may work easily against hub C of the piston.

Springs constructed of two pieces of steel, as above shown and described, maybe easily formed by almost any ordinary workman, and tempered in an oil-bath without any difficulty whatever. rlhey will work freely when in place. They will not fracture or break, as do those springs that are made of one piece of steel, nor are they as difiicult to temper They can be given a more uniform temper, and thus their elasticity will be found to be greater than if they had been formed of one Apie-ee of steel.

Springs constructed as herein described will be much more durable and reliable than in the old style of constructing them of one piece of steel.

Another great advantage possessed by my springs is their uniform pressure upon all parts of the circum ference of the piston-packing rings F and G.

'lhe position of the severa-l ports of a steam-engine piston are shown in tig. 3, in which E designates the piston-rod, I) the hub, and O a rebate, turned down 'off the hub, to receive the follower, which is secured in place by nuts or bolts K K K.

'lhe follower is made inthe usual and well-known manner, and a little smaller than the outside rings G.

Having described my invent-ion,

What I claim-as new. and desire to secure by Letters Patent, is

The construction of a piston-spring, consisting of two parts, A and B, made of flat bar or ribbon-steel, substantially in the manner and for the purpose as herein shown and described.

- WILLIAM R. BROWN.

iiitnesses S. S. `J onus, THOMAS HASTING.

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