US952044A - Plunger-guide for direct-plunger elevators. - Google Patents

Description

T. LARSSON & A. G. SMITH. PLUNGER GUIDE FOR. DIRECT PLUNGER ELEVATORS.

APPLICATION FILED MAY 22, 1903. RENEWED AUG. 9, 1909.

952,044, Patented Mar. 15,1910.

I i l 0 H 15 W 10' 14 II 14 v 14 I, e e 1%55 Him- 12 L 1L" i 1L I fTtt wioas': mesaes." 1195 scans earns surren- THURE LARSSON AND Alli/[OUR COLUMBUS SMITH, OF WORCESTER, MASSACHUSETTS,

ASSIGNORS T0 SAID LARSSON, W. E. D. STOKES, OF NEW YORK, N. Y., AND FRED A. JONES, OF WORCESTER, MASSACHUSETTS.

PLUNGER-GUIDE FOR DIRECT-PLUNGER ELEVATORS.

To all whom it may concern:

Be it known that we, THURE LARSSON, a

subject of the King of Sweden, and AMOUR COLUMBUS SMITH, a citizen of the United States, both residing at Worcester, in the county of Vorcester and State of Massachusetts, have invented a new and useful Plunger-Guide for Direct-Plunger Elevators, of which the following is a specification.

This invention relates to a hydraulic elevator of the direct plunger type.

The especial object of this invention isto provide simple and eflicient means for steadying a plunger and for preventing swaying or vibration of the end of the plunger within the casing. 0

To this "end, this invention consists of the plunger guide and of the combinations of parts therewith as hereinafter described and more particularly pointed out in the claims at the end of this specification.

In the accompanying drawings, Figure 1 1 is a side view partially broken away of sufthereof, the end of the ficientpa rtsofa plunger elevator to illustrate the application of the invention thereto. Fig. 2 is an .enlarged fragmentary view of the lower end of the cylinder, and Fig. 3 is a sectional view plunger being shown in bottom plan view.

A hydrauligeleva tor of the class to which this invention relates coiiiprises a casing or cylinder which extends down into the ground, a distance corresponding to the length'of the elevator run, a plunger which passes through a stufling box at the upper end of the casing and extends down loosely into the casing, and an elevator car on the upper end of the plunger. In an elevator car of this class, the car is guided on suitable ways and the upper plunger is ghided in the-stuffing box at the upper end of the casing or cylinder.

In building elevators of this class for comparatively'short runs the stuffing box for the plunger and the vertical ways for the car have been relied upon for guiding the plunger in its up and down travel, and although elevators as thus constructed ,have operated efficiently for short runs, for which they have ordinarily been regarded as best adapted, it has been found, in practice, that when a ver lon plunger is employed 1t 1s notv desirab e to cave the lower end of thev Specification of Letters Patent. Application filed Mai; 22,,1903, Serial No. 158,315.

plunger casing or Patented Mar. 15, 191(1). Renewed August 9, 1909. Serial No. 512,037.

plunger free or unsupported, that is to say, where a very long plunger is employed the lower end or the plunger, in some cases, has had a'tendency to vibrate or swing within its casing or cylinder. This is especially objectionable, because as the elevator is as cending, the length of the plunger within the casing growing shorter will tend to shorten and accentuate such vibrations so that said vibrations will be transmitted to the car, and in any case will tend to Wear and displace the packings in the stufiing box. To overcome this objection, we have provided simple and efficient means for steadying .the lower end of the elevator plunger without changing its line of travel, without interfering with the insertion of the end of the plunger through the stufling box and Without requiring the finishing or boring out of the inside of the plunger casing. The guiding devices which we have employed for this purpose preferably comprise a number of bearing arms which are ex: pa'nd-ing under spring tension. Each of these bearing arms is preferably provided with a roller for engaging the side of the plunger casing and this entire attachment or steadying device is preferably made 111 the form of a fixture which can beconnected to the lower end of the plunger.

Referring to the drawings for a detailed description .of an elevator provided with a plunger guide constructed 'accordlngto the invention, A designates the casing or cylinder which extends down into the ground as shown in Fig. 1. At its upper end the casing A is provided with a top B, havingan opening C to which the to and from pipe "is connected. Extending down through the stufiing box at the upper end of the head B is a plunger or pipe D which carries the elevator car E at its upper end. These parts may be of any of the ordinary or ap-' proved construction and need not be herein further described at length.

The plunger guide or steadying attachment comprises a plug or counterbored body portion 10 which is threaded into the lower end of the plunger D. Pivotally connected to the plug 10 are bearers or arms 11 and journaled in each of the arms 11 is a convex faced wheel 12. Extending down between the adjacent arms 11 are foot pieces or guides 13, which serve to guide the end of plunger comprising movable arms, a device the plunger when the same is inserted I through the stuffing box. Rested on the in ner ends of the arms 11 is a plate or follower 14 which is normally forced down by a spring 15. In the use of a plunger-guide. as thus constructed, the wheels 12 will engage the sides of the casing whenever the lower end of the lower plunger is bent or deflected from central position, the tension of the spring tending to force thearmsout wardly will aid in preventing' the plunger from vibrating while at the same time the use of this steadying attachment will not require finished surfaces inside of the casing.

We are aware that changes may be made in practicing our invention by those who are skilled in the art without departing from the scope thereof as expressed in the claims. We do not wish, therefore, to be limited tothe construction herein shown and described but What We do claim and desire to secure by Letters Patent of the United States is:

1. In a construction of the class described, the combination of a plunger casing, a plunger and a steadying attachment for the ocated in the bottom of said plunger for engaging said arms to force them outwardly, and a spring for operating said device.

2. In a construction of the class described, the combination of aplunger casing, a' plunger therefor, and a steadying attachment for the plunger comprising pivoted arms, a follower movabl mounted on the plunger for en aging sai arms and forcing them outward and resilientmeans for plunger runnln'g 1n sald caslng, an elevator car on the upper end of the plunger, and a steadying attachment at the lower end of the plunger comprising a bottom plug, arms pivoted therein, rollers journaled in the arms, a follower, and a single coiled spring I acting on the follower to spread the arms. 5. In a construction of the class described, the combination of a plunger casing, a plunger running therein, an elevator car on the upper end of the plunger, and a steadying attachment at the lower end of the plunger comprising a plug, at the lower end of the plunger, three hell-cranlcarms pivoted in the plug,za roller journaled in each of said bell-crank arms, a follower resting upon the horizontal members of said bell-crank arms, and a spring coiled in the plug and forcing down said follower to spread the bell-crank arms.

In-testimony whereof we have hereunto set our hands, in the presence of two subscribing witnesses.

THURE LARSSON. AMOUR COLUMBUS SMITH. Witnesses: v

LOUIS W. SoU'rHeATE,

moving the follower toward the arms.

PHILIP W. SOUTHGATE.

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