US375246A - Glass preserving-jar - Google Patents

Description

Patented Deo. 20, 1887.

MQANTHONY. GLASS PRESERVING JAR.

(No Model.)

Harney N. PETERS Pmmumgnpxwr, wmingnm nc of my improved fruit-jar.

UNITED STATES l ,ATE-NT einen.

MARK ANTHONY, or sAN IIRANoIsoo, CALIFORNIA.

GLASS PRESERVING'JAR.

' SPECIFICATION forming part of Letters Patent No. 375,246, dated December 20, 1887.

Application filed June 25,1887.

T0 @ZZ whom it may concern:

Be it known that I, MARK ANTHONY, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvementsin Glass Preserving-Jars; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the saine, reference bein g had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

Figure l of the drawings is a side elevation Fig. 2 is atop View of same; Fig. 3 is a partial central Vertical section of same. Fig. 4t is a side view of lid of jar. Fig. 5 is a detail top view of lid. Fig. 6 is a transverse section of spring II.

The object of this invention is to provide a f glass preserving-jar which can be readily and quickly closed, and wherein the cover will be allowed to yield under pressure to avoid fracture; and the invention consists in the construction and novel combination of parts, all

' as hereinafter set forth.

In the accompanying drawings, the letter A designates the glass jar, which is formed with a large throat, B, above which is an outwardlyaring mouth, C, which terminates in an inwardlyextending'ange, D, having at diametrically-opposite points elongated notches E. The bevel or flare of the mouth is about thirty-five or forty degrees at the bearing portion a, or where the rubber gasket of the cover presses when the jar is closed. The object of this inclination is to allow the cover to move downward, and at the same time to press the rubber against the bearing c without having it engage the bearing with a choking or corking action. In this slope I have established a mean between a bearing which would be too fiat and one which would approach too near the vertical.

F indicates the cover, which is formed with a central stud, 6,011 its upper surface and with gradually-rising iianges or inclines c on opposite sides of its margin, said inclines-facing upward, as indicated. f

Between the base-rim of the cover and its outer margin, from which the inclines rise, is

serial No. 24a-iss. kno model.)

level of the highest points of its inclines and the general slope' of its side (referred to as an imaginary linejoining the lower angular edges of its rim projections) are such as to correspondwith the depth ofthe mout-l1 of the jar andthe slope of its bearing a. rubberring or gasket G is placed in position around the base-rim g, its upper surface is engaged by the annular bead or projection e, and when the cover is put in position in the mouth of the jar the lower surface of the rubber will engage the inclined bearing a of said mouth.

H is a spring-fastening, which is made less elastic at its middle portion than at its end portions. This spring extends transversely across the cover, and an. opening or perforation, h, at its center engages the stud of the cover, so that a journal is provided on which the spring can be turned. The spring is usually made stronger at its middle portion by giving it a slight transverse concavity in that part, as indicated; but it is obvious that this increase of strength can be obtained by providing greater width or greater thickness of metal. 'Ihe spring is cut sufficiently long to allow its ends to extend under the inwardlyturned iiange D of the mouth of the jar, the notches E E thereof permitting the introduction of the ends of the spring below the end of said flange D.

In order to introduce the spring, the cover should be turned until the lowest portions of its inclines are opposite said notches. Then the spring is introduced and turned around, its ends sliding under the flange D of the jar and upon the inclines c of the cover until sufcient pressure upon the rubber gasket is secured. In this operation the spring alone is turned and the annular bead-like under projection, e, of the cover engages the rubber and presses it closely against the inclined bearing of the jar-mouth, so that it has no tendency to slip or become disarranged in the act of fastening.

rI'he ends of the spring are sufficiently elastic to allow the cover to yield under great outward pressure of the gases or vapor evolved. So, also, when condensation takes place the cover is drawn inward slightly, and the slope,

Vhen the iiat roo ofthe mouth allows this action. The springbar, however, continues its pressure on the inclines of the cover when this condensation 0ccurs, so that the fastening remains secure.

In order to provide an escape for steam, au indentation, o, may be made in the cover, said indentation having a thin bottom, which can be readily punctured with a sharp instrument. This opening may be scaled up after the steam has passed oit.

Having described this invention, what I claim, and desire to secure by Letters Patent, 1s-

l. The combination, with the jar having a daring mouth and the inwardly-turned rimfiange provided with opposite notches, of the cover having opposite inclines rising from its marginal portion, a sloping side, and an annular angular projection or bead on said sloping side, a rubber gasket, and transverse springfastening, substantially as specified.

2. The combination, with aglass jar having a Haring mouth terminating in an inwardly! MARK ANTHONY.

IVitnesses:

THno. MUNGEN, PHILIP C. MASI.

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