US287684A - Recording pressure-gage - Google Patents

Description

(No Model.)

P. A. JONES & S. GLINES.

RECORDING PRESSURE GAGE.

No. 287,684. Patented Oct. 30, 1883.

WITNESSES v 1 \/ENTEIR5 UNrrnD STATES PATENT OFFICE.

FLORENTINE A. JONES, OF NEYV YORK, N. Y., AND SYLVESTER GLINES, OF

' BOSTON, MASSACHUSETTS.

SPECIFICATION forming part of Letters Patent No. 287,684, dated October 30, 1883.

Application filed May 19, 1883. (No model.)}

To all whom it may concern.-

Be it known that we, FLORENTINE A. J oNEs, of the city, county, and State of New York, and SYLVESTER GLINEs, of Boston, in the county of Suffolk and State of Massachusetts, have invented new and useful Improvements in Recording Pressure-Gages, of which the following is a specification.

Our invention relates to improved mechan- IO ism for the purpose of showing the extent and variations of pressure in steam-boilers, cylinders, or other vessels containing air, gas, liquid, or other fluids; and it consists more particularly in the construction and adaptation of I 5 such mechanism in combination with the socalled Bourdon spring or its attendant mechanism, .in amanner to show by marks or delineations upon a chart or dial the variations of pressure and a record of the same.

In the accompanying drawings, in which similar letters of reference indicate like parts, Figure 1 is a plan view of our improved recording pressuregage with the dial of the steamgage removed. Fig. 2 is an enlarged side elevation of the standard Ldetached. Fig. 3isa detailed elevation of the pointer. Fig. 4 is a sectional view of the mechanism for holding the dial. Fig. 5 is an enlarged section of the pointer. Fig. 6 is a plan of a modification below described.

A represents one side of a circular box, connected to the other half, A, at B, havinga recess at C for the accommodation of the c011- necting mechanism.

D represents a Bourdon spring, and E the ordinary mechanism of a steam-gage, consisting, essentially, of a segmental rack, e, pivoted near its rear end and meshing into a pinion carrying the pointer K.

P is a link connecting the spring D with the mechanism E, which gives movement to the pointer K, showing, in connection with a dial, the steanrpressure.

Except the arrangement of the boxes, the 45 foregoing relates to a form of steam-gage in common use.

We will 110w proceed to describe the parts which relate to our invention and the arrangement of the same.

G- is a dial, made of paper or other suitable material, rotated by a clock-movement, and having upon its surface twenty-four radial curved lines, 5 corresponding with the number of hours in a day, and a certain number of concentric circlesmz, corresponding with the press- 5 5 ure indicated upon the dial of the steamgage.

The dial-wheel 0 of the clock-movement is provided with a shouldered hub n, and acircular disk, 8, said hub havin g a threaded pivot,

a, extending from it, above the surface of the disk Z), above which is a button, 0, screwed upon said pivot a, thus allowing of the changing of the dial with facility, it being held between the two disks by the friction caused by screwing the button a down upon the disk I). 6 5' Instead of the dial-wheel being provided with a pivot, it might have a threaded central hole, and the button a mighthave a pivot with a thread upon it to screw into the threaded hole in the dial.-wheel, and thus press the disk 1) upon the dial, which may rotate once in twenty-four hours, or at a faster or slower speed, if desired.

H is a lever, crooked for convenience, and pivoted at h to the standard L, so as to freely swing back and forth. It is also provided at its free end with the vertically-pivoted holding-bar t, in which is placed the pencil or pointer holder j, provided with the pencil or pointer j, which is regulated and held in place by the screw or follower z.

o is a spring, one end of which is secured to the under side of the lever H, and the other end presses upwardly on the rear end of the bar i, thus having atendency to hold the front 8 end of said bar .down, and hence hold the pointer on the dial. Thebar is prefcrablypivoted to the leverHin the manner shownviz., by slotting it and squaring the end of the lever, leaving a tongue, 00, to enter the slot and hold 0 the said ban, which may be turned back (upward) whenever it is necessary to change the dial. (See Fig. 3.) The standard L, into which is pivoted the long vertical rod Z, Fig.

2, allows the lever H to swing freely, but with- 9 5 out lost motion.

n; is a slot near the rear end of the lever H, by means of which the connecting-rod M is attached thereto,at such a distance from the fulcrum as to insure any desired movement of I00 the said lever, the other end of said connecting-rod being pivoted at p to the Bourdon spring D. This rod M should be free, but not unduly so, to make its movement.

The operation is as follows: Steam or other fluid enters the hollow spring D through the hollow plug R, and the pressure acting onthe inner surface of the spring causes it to expand or contract as the pressure is greater or less, and this movement is communicated by means of the rod M to the lever H, thus causing the marker j at the end of the lever to vibrate with the movement of the spring, and with the pointer K upon the dial of thesteamgage. The pencil j, pressing lightly onthe dial G, gives a delineation of the, pressure, as indicated by the concentric lines m and figures, and the time at which any change has taken place in the pressure is shown by the relative position of the indication or mark of the pencil and the eurvedlines g, andthe figures,from one to twelve, at the ends of the curved lines, which indicate the hours, it being understood that the dial rotates once in twenty-fourhours, and is moved by a clock-work. (Not shown in the drawings, nor the cover of said clockwork.) It will thus be seen that an exact delineation or chart of the pressure and the time of any and all changes therein is shown upon the dial G, which can be preserved for future reference.

It is not necessary that the connection with the spring D should be made in the exact manner described, nor at the particular point shown, for a connection could be made at any point on a Bourdon spring, where the requisite movement can be obtained.

In the modification shown in Fig. 6 the rod M is pivoted to the link 1 instead of to the end of the spring, and it will readily be seen require an even,

that it could be pivoted to the rear end of the rack c with similar results.

- We are aware that it is not novel to applya pencil or pointer to the end of a lever inarecording pressure-gage; also, that neither a threaded follower nor apivoted pointer-bar is new in itself considered. The novelty of this portion of our invention consists in the combination of parts as arranged and constructed.

The value of this invention does not alone consist in its being an additional safeguard to the lives and property of steam users, butit is of great practical value to all whose operations constant, and uniform degree of heat. 7

Having thus fully described our invention, what we claim, and desire to secure by Letters Patent, is-

1. In a recording pressure-gage, the combination'of the following elements, viz. a Bourdon spring, a multiplying-lever, and suitable intermediate mechanism, said lever bearing a delineating or recording device, whereby the extent and variations of pressure may be recorded, substantially as and for the purpose set forth.

2'. In a recording pressure-gage, the combination of the lever H, the pointer-bar z, pivoted at i to said lever, the spring 12, securedrigidly at one end to the under side of said lever, and with its free end bearing against the rear under portion of said pointer-bar, the pointer j j, and the threaded follower'z, all arranged and constructed substantially as and for the purpose described.

FLORENTINE A. JONES. SYLVESTER GLINES. \Vitnesscs:

I HENRY W. WILLIAMS,

J osnrn ISHBAUGH.

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