US1097180A - Preserve-jar. - Google Patents

Description

Y T. MAYNARD..

PRESERVE JAR.

APPLICATION FILED MAY 23, 1913.

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THEO'DOBL MAYN'ARD, 0F BELLINGHAM, WASHINGTON.

PRESERVE-JAR.

Specification of Letters Patent.

Patented May 19, 1914.`

Application med May 23, 19-13. serial No. 769,530.

To all whom t may concern:

Be it known that I, THEoDoRE MAYNARD, a citizen of the United States, residing at Bellingham, in the county of Whatcom and State of Washington, have invented certain new and useful Improvements in Preserve- Jars, of which the following is a specification.

This invention relates to an improvement upon that class of receptacles for preserves illustrated in the patent granted to David E. Lain and myself October 11, 1910, No. 972,206.

The chief objects of the invention are to insure expulsion of all air from the jar in the act of sealing, to provide more effective sealing means and to locate the clamping device so that it will be largely protected by the cover which it holds to the jar.

The invention therefore consists in the structure of parts and in their combination, for the purpose specified, substantially as herein set forth and claimed.

In the accompanying drawing, which forms a part of this specification, Figure 1 represents, in vertical axial section, the upper portion of one of the improved preserve jars showing the cover as clamped to the receptacle and completely sealed thereon; Fig. 2 is a partially sectionized elevation of the same structure showing the clamping lever raised as before applying pressure to the parts in sealing; and Fig. 3 is a plan of the structure as shown in Fig. 1.

The receptacle indicated at 5 and cover at 6 may be of any suitable material, preferably glass. The form preferred for the receptacle is that wherein the vertical elements of the interior wall are uninterrupted, the exterior wall having a shoulder or bead extending around the top to secure the reentrant ends of the clamp 7.

The improved cover 6 has its central portion depressed so that the upper surface of said depression will be below the upper edge of the receptacle. This depression eX- tends well toward the edge of the cover and so forms an inner shoulder for centering the cover upon the receptacle and for holding the gasket 8 in place on the cover ready for application of both together to the receptacle. To make sure of the peripheral seal by gasket 8 two annular beads or ribs 9 are formed on the cover to be pressed into the gasket when the clamp is applied. The

chief purpose served, however, by depressing the central portion of the cover, is that of absolutely insuring the expulsion of the last bit of air from the jar through the central aperture 10 in applying the cover to the jar. As will be readilyl seen this result must follow if. the, receptacle is filled practically level full. The issuance of the air bubbles is somewhat assisted by slightly concaving the under surface of the cover at the center thus leading the air to the hole 10. The form of clamp shown is especially well adapted for use on this improved cover with its means for finalcentral sealing, which is effected by holding downa disk 11, of rubber or other suitable material, over the hole 10, at least until the contents of the jar have cooled when atmospheric pressure will continue the seal of said disk. The said disk is Vheld down and the cover clamped to the jar by depressing the cam lever 12, which is pivoted in a central aperture in clamp 7. To prevent displacement of disk 11 by the shoving action of the cam-end of said lever, a thin metal strip 13 is attached at one end to the underside of clamp 7 and has its free end interposed between said cam and the disk. It is desirable that this strip 13 follow the said cam when the lever is thrown up, thereby to more readily permit the application or adjustment of the disk 11 after the clamp has been applied. This purpose is accomplished by making said strip from spring metal. It is also essential that nothing shall interfere with the proper tightening of the strip 13 upon the disk 11, therefore the retaining bead 14, for the disk 11, is diametrically divided and the clamp preferably placed so that said strip will be alined with the openings between the parts of said bead, as seen in Fig. 3. These gaps in the annular bead 14 also permit the ready escape of the liquor discharged through aperture 10 following the discharge of air through said aperture on the application of the cover to the jar.

From the above description, it is obvious that with the receptacle filled practically full, the cover, when applied, will, because of its center being depressed, displace all the air trapped between the cover and the surface of the contents of the j ar, which air will iow out through hole 10. Some liquid will also find outlet through said hole, so vthat upon application of the sealing disk 11 no air remains in the jar. Then by turning down the lever 12, the cover is Cil tightened upon its gasket and the disk upon y its hole, thereby effecting a Complete sealing of the jar.

The invention claimed is In a preserve jar, the combination with the receptacle, of a centrally perforated cover provided with peripheral sealing means and having its entire central portion, within the receptacle, depressed to a depth such that the upper surface of the depression is below the upper edge of the receptacle for the purpose speoied, a sealing disk for said central perforation, a diainetrieally divided bead concentric with said hole for retaining said disk, a clamp whereby the disk may be tightened upon the cover and the cover upon the receptacle and having a cani lever for effecting said tightening, and a spring-metal strip attached to said elainp by one end and adapted to follow the cani of said lever from one position to `the other for the purpose specied and to be interposed between said cani and the disk and in alinement with the gaps in said bead when said lever is turned down into sealing position .all substantially vas and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

n THEODORE MAYNARD. Witnesses R. S. SIMPSON,

ELMA N. HANsoN.

Copies o! this patent may be obtainedfor five cents each, by addressing the Commissioner of Patents. Washington, D. C.

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