US1387451A - Capsule or container for gases or liquids under pressure - Google Patents

Description

, R. H. CAMPBELL. CAPSULE 0R CONTAINER FOR GASES ORLIQUIDS UND ER PRESSURE APPLICATION FILED OCT 23, I9I9. 1,387,451.

Patented Aug. 16, 1921.

2 SHEETS-SHEET I- n .r ai

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H. CAMPBELL. CAPSULE OR CONTAINER FOR GASES 0R LIQUIDS UNDER PRESSURE.

' APPLICATION FILED act 23, 1919 1,387,451

2 SHEEfS-SHEET 2.

fiflalm l 217/ .By 4%? M114 Amway 1 UNITED STATES PATENT OFFICE.

ROBERT HUNTER CAMPBELL, OF "UIPER EDMONTON, ENG-LAND.

CAPSULE OR CONTAINER FOR GASES OR LIQUIDS UNDER PRESSURE.

To all whom-it may concern:

Be itv known that I, ROB RT HUNTER CAMPBELL, a subject of the King of Great Britain and Ireland, residing at Angel Road, Upper Edmonton, in the county. of Middlesex, En land, have invented certain new and useful mprovements Relating to Ca sules or Containers for Gases or Liquids nder- Pressure, of which the following'is a specification. i

This invention relates to capsules or containers for gases or liquids under pressure, and is especially directed to improvements in the type of closure device described in BritishPatent No. 9652 of 1910, in which a soft metal plug is utilized to retain in position a hard metal closing element,

The objects of the invention are to. simplify the construction, and to facilitate the re-use of the capsules or containers.

The lnvention conslsts broadly in forming an internal thread in the neck of the capsule or container, above the shoulder or the like against which sealing is effected, and in retaining the closing element by a plastic element flowed into this thread.

The invention further consists in employing in conjunction with the above'a buckled disk of hard metal as the closing element.

The invention also consists in forming notches or other engaging. devices in the plastic metal,

- In carrying the invention into effect inthe form shown by way of example in Figs. 1 and 2, as a plied to containers for carbonic acid gas on er pressure, we utilize capsules.

made preferably in accordance with British application No. 19573 of 1918 having'thickened necks.

closing disk d is adapted to seat, a'packing ring 0 being preferably iprovided, to facilitate the effective sealing o the capsule.

The cylindrical wall of the recess is provided with a screw thread 1, so that the neck" pressing up the soft metal at the same time advancing the preferably simultaneously with the flowing of the plastic metal into the thread, these notches or the like screw-driver, and having being.

nished with a plastic element Z The neck a is provided with a recess 6' having a shoulder-0 upon which the Specification of Letters Patent. Patented A .16, 1921 Application filed October 23, 1919. Serial No. 332,822.

is internally screwed. A ring 9 of plastic metal which fits loosely inside the screwthreadedportion f of the recess 6 is placed into position on the top' of the closing disk d, which is preferably of hard metal, and is buckled, so that it does not seat upon the shoulder or the ring washer 6 provided thereon, until some considerable pressure has been applied to it. The plastie'metal ring g is held in place by a suitable plunger h, preferably with a projecting pin a which passes .into the hole formed through it, and before pressure is applied, the gas can be' filled into the capsule by the usual means. When the capsule has been filled to the pressure required, the plunger h is advanced, ring, and expandmg it laterally into the threads'formed in the wall of the recess, the projecting pin i closing disk Into a sealing position on the capsule neck. The plunger i can if necessary be provided w1th four projecting feathers which form longitudinal grooves in the internal surface of they ring 9 as the plungeris advanced. The capsule is available for use of its "contents by perforation of the closing disk in the usual way. 1 VVhe'n it is desired to re-use the capsule, it is only required to hold thecapsule in a suitable applianceto prevent it turning, and to apply to it a spindle corresponding to a a male end adapted to engage with the grooves formed in the plastic metal ring. When this is advanced against the ring,and rotated in the direc-- tion. to unscrew that ring, the whole closing device-is readily removed, and the capsule'is ready for re-use.- Instead of employing the buckled disk above described, we may use a dished metal cup having its edge serrated or corrugated. or provided with projections as described in British Patent No. 9652 of,1910.

In Figs. 3 and 4 is shown a capsule provided with a dished metal cup j having its will perforated with four holes k and furhavin'g grooves m to facilitate filling. 106

It will be noticed that these grooves m are provided at both ends of the element Z the objectbeing to render it impossible for the latter to be placed incorrectly in position I in the neck of the capsule. i 1 10 "Beneath the dished cup, 7' is placed a washer n which upon applicat on of pressure to the cup is pressed firmly upon the seating and provides a good joint between the latter and the flange of the cup In 3 the different parts are shown in the position occupied during filling of the capsule and Fig.4 shows the corresponding positions on completion of this operation.

For reuse of the capsule similar means may be employed for the removal of the plastic element 1 as are described above with reference to Figs. 1 and 2.

We may also employ either ebonite fiber or metal sealing washers, with such cupped closing disks, or with the buckled type disk above indicated.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:-

1. A capsule or container for gases or liquids under pressure including an internally threaded neck, a seating, sealing means co-acting with said seating and a plasticelement expanded into said internally threaded neck to retain said sealing means on said seating.

2. A capsule or container for gases or liquids under pressure including a neck, a

seating and a screw thread in said neck, a packing ring, a plastic element expanded into said screw thread to retain said packing ring upon said seating and a metallic member between the plastic element and said packing ring.

3. A capsule or container for gases or liquids under pressure including a neck, a seating and a screw thread in said neck, packing means, a plastic element in said neck, and a buckled plate between the plastic. element and said packing means.

4:. A capsule or container for gases or liquids under pressure including a neck, a seating and a screw thread in said neck, packing means, a plastic element in said neck, and'a metallic cup-shaped member between the'plasti'c element and said packing means. I

5. A method of retaining sealing means upon a seating in a capsule or container which includes expanding a separate plastic element into a threaded neck of the capsule by applying'pressure to the plastic element.

In testimony whereof I have signed my name to this specification.

ROBERT HUNTER CAMPBELL.

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