US87274A - Improved fruit-jar - Google Patents

Description

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JOHN L. MASON, OF. NEW YORK, N. Y.

Letters Paten-.t No. 87,274, dated February 23, 1869.

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The sshedule referredto in these Letters Patent and making part of the same.

To all whom it 'ma/y concern: v

Be it known that I, JOHN L. MASON, of New York city, in the county' and State of New York, have invented a. new and useful Improvement in Preserve- Jars; and I do hereby declare that the following is a full, clear, and exact description thereof', reference being had to the accompanying drawings, making a part of this specification, in which-- Figure 1 is' a side elevation of a jar, with 'my improved cover upon it. Figure 2 is an enlarged diametrical section through the jar', withits cover secured in place upon it.

Figure 3 is a side view of the jar, without its cover,

but with the packing-ring in place.

Figurefiis adetail section of a portion of a jar, having the ilange surrounding its mouth, andl the rim of its cover, considerably bevelled.

Similarletters of reference indicate corresponding parts in the several gures. l

The nature of my invention consists in applying a rubber gasket-ring edgewise upon a horizontal shoulder, which is above a continuous screw, and having said ring so set against an oblique seat on4 the neck of the jar, 1n combination with a flanged jar-cover, of

less diameter than the diameter to which the said ringl can be compressed when 4on its seat, whereby, when4 the pressure of the screw-ring is made to act upon the cover, the lower` edge of the .ange of the cover is caused to press uponA the lrubber gasket with an inward lateral force, and, at the. same time, up-

set a portion of the said ring, and'i'orce such upset portion downward and outward upon the horizontal gasket-shoulder, in such a manneras to pack the joint immediately between the flange ci' the cover and the gasket-shoulder, while, at the same time, the vertical joint between the rim of the cover and the neck or rib ofthe jar, is also packed. a

-Thus, it is`seen, with a single gasket-ring, set edgewise, in an oblique position, upon an extended gasketshoulder, and against the neck or rib of the jar, Ibave packed two joints, which are outside of the jar, above the glass screw, and wholly beyond the -influence of the. gases arising from the contents of the jar.

Previous to the date of this invention, I had filed an application for a patent on ajar, which has a lhorizontal gasket-shoulder above the screw, on which a gasket-ring'was placed flatwise. In said application, I represented a cover with ,a rim, and held down by a sheet-metal screw, and therefore, my present invention is to be regarded only as an improvement, of subor- (isnaste character, to the invention led January 15,

6 Y A is a jar, made of glass, or other vitreous substance,

with ascrewthread, a, formed on its external surface, and consisting of a number of turns.

b is a horizontal shoulder, which forms the bottom side of an anriuiar recess, c, which receivesan India rubber packing-ring, O, andprevents this ring from risingout of its place.

The recess c surrounds the base ofthe month d, of the jar, the external surface of which mouth is upis at the terminus of the 'said threaded portion, will aiiord a widebase upon which to receive upon it all that portion of the India-rubber packing C, which is rexpandedby a vertical and lateral compression of this packing, when the cover Dis forcibly confined in its plaze over the mouth of the jar, as shown in tige. 1, 2 an 4. v

Cover D isA constructed with a downwardlyfflanng rim, e, terminating, at its lower end, in an external rib or ange, g,- -and this cover should be so constructed, with reference tol the 'size and bevelled shape of the Ino'uth` d, that, in the act ci'. conning it in place, as shown'in gs. Zand 4, its inner bevelled surface e will compress the packing C, both laterally and vertically. That portion of the packing which will, under such pressure, swell out beneath the bottom edge of the cover,'will be compressed between this edge and `the extended shoulder b, as shown in gs. 2 and 4, and thus form both a vertically and a laterally-packed joint, with a single packing-ring. The' sheet-metal screw-ring B', with its flange at h, is used to confine the cover D in its place, as above described.

I am aware that it is not new, in fruit-jars, to introduce a packing-ring into an annular recess made in a bevelled external surface of the mouth of a jar. But I am not aware ythat, prior to my invention, such a grooved or recessed jar has been made with a horizontally-extended shoulder', `b, which would receive upon it that portionl of the rubber packing which is crowded downward and expanded by the act of forcing the cover to its place, and thus adapting a single packingring to seal two joints, to wit, the joint which is inside of the inner surface e, of the rim of the cover B, and the joint which 'is between the bottom edge lof the rim of the cover and theunderlying shoulder b.

I donot claim, under this petition, the screw-ring B, nor the flanged, inverted, cup-shaped cover I), nor the placing of a packing-ring upon the external surface of the rib surrounding the' mouth of a jar.

Nor do I claim the construction of a jar with a screw thread,ltern1inating in a dat shoulder, b, nor the wardly tapering, and of less diameter than that portion of the jar which has the screw-thread a formed on it. Consequently, the horizontal shoulder b, which construotion of a jar with a bevelled or upwardly-tapering rib, d, as these parts have hereto` been fully described by me in previous applications for Letters Patent.

Nor do I ever intend to claim, under this application, theinve tion embraced in my application, led January l5, 1868.

Nor do I claim a gzrskevririg, set edgeWise, and wholly compressed Within the rim e, of the cover.

Nor do I claim a gasketering set into the edge of a cover.

Nor do I claim a gasketring set down upon a shoulder, and impiuged upon at Vits top by a riur, which acts with only a straight downward pressure.

In a word, I do not claim anything which has been invented prior to my invention; but

scribed.

JOHN L. MASON. `Wituesses:l

R. T. CAMPBELL, JULxUs HIRsoH.

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