US923459A - Pneumatic-despatch-tube system. - Google Patents

Description

0. F. STODDARDQ- PNEUMATIC DESPATOH TUBE SYSTEM. APPLIGATIQN FILED JULY 20, 1907.

Patented June 1, 1909.

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WITNESSES:

ATTORNEYJ G. F. STODDARD.

PNEUMATIC DESPATOH TUBE SYSTEM.

APPLICATION FILED JULY 20, 1907.

Patented June 1, 1909.

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A TTORNEYQ I rs: mmms PETERS 60., wnsumcron. n. c.

UNITED STATES FFEQE.

CHARLES F. STODDARD, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO AMERICAN PNEU- MATIC SERVICE COMPANY, OF DOVER, DELAWARE, A CORPORATION OF DELAWARE.

PNEUMATIO-DESPATCH-TUBE SYSTEM.

Specification of Letters Patent.

Patented June 1, 1909.

Application filed July 20, 1907. Serial No. 384,725.

0 all whom it may concern: 1

Be it known that I, CHARLES F. Sronnum, i of Dorchester, Boston, in the county of j Suffolk and State of Massachusetts, have; invented certain new and useful Improvements in Pneumatic-Despatch-Tube Systems, of which the following is a specifica- 1 tion.

My invention relates to new and useful 5 improvements in terminals for pneumatic? despatch tube apparatus and especially to E such apparatus wherein large carriers are used for the transmission of mail matter, merchandise and the like.

The object of my invention is to produce a machine simple in construction and ellicient in operation and which is constructed so as to occupy very small floor space.

My invention consists in certain novel to: tures hereinafter described and particularly pointed out in the claims.

Tn the accompanying drawings are illustrated a construction embodying my invention.

Figure l is a plan view of the receiving terminal. Fig. 2 is a side elevation of same. Fig. 3 is an end elevation of same. Fig. 4 is a plan view of a portion of the goose neck with-part of the upper portion cut away and showing a carrier in position. Fig. 5 is an elevation of a portion of the goose neck showing a carrier in position. Fig. 6 represents the section of the goose neck.

'Like letters of reference refer to like parts throughout the several views. I

In a pneumatic despatch system working i under pressure, the air is compressed at one end of the tube and gradually expands until i it reaches atmospheric pressure at the other end, and it is at this end of the tube where the air has reached atmospheric pressure that the terminal herein described is to be placed. In large tubes where the carriers 5 have considerable weight, it is necessary to provide some means for bringing them to a stop in a manner which will be safe and cause no damage to them. Numerous means are at present in use, such as cushioning the carrier in the dead end of the tube and then opening the dead end and discharging the carrier on to a suitable receiving table. Another means is to allow the carrier to 1 come out of the end of the tube at full speed into the goose neck. On account of the peculiar construction of carriers used in large tube service, it is necessary to build this goose neck with a radius so large that the over-hanging ends of the carrier will not come in contact with the wall of the goose neck. The object of the present invention is to construct a goose neck of such a shaped section that the radius can be made very l small and therefore very little floor space occupied.

The operation is as follows: The current of air coming up through the transmission tube A is the source of supply for the com pressor operating the return line, these tubes always being placed in pairs. This current of air passes from the transmission tube A, through the slotted casing A into the return tube A to the compressor above men tioned. A carrier coming into the receiving machine from the transmission tube A passes through the slotted casing A into the bend A where it is turned into a horizontal position and enters the goose neck B passing around same and losing most of its momentum, it reaches the end of the goose neck B and strikes the buffer C and then rolls down on to the table D. The horizontally disposed gooseneck is curved to a comparatively short radius and has an open inner face. The main part of the goose-neck B has a cross-area sufliciently large to receive and carry the rings E on the carrier E. In the back or convex side of the goose-neck is the chamber or passage B the curve of which is made on a greater radius than that of the main part of the goose-neck. This chamber or passage is sufliciently large in crosssection to receive and clear the ends of the carrier, which overhang the rings E as the carrier moves around the curve of the goose-neck. In Fig. 5 the dash line E represents the periphery at the end of the overhanging portion E of the carrier E. The carrier E slides on the rings E The dot and dash line B represents what would be the wall B of the goose neck 13 were same carried around in the usual manner. The dash line E and the dot and dash line B are taken in the same plane. It will be seen in Fig. 5 that the dash line E overhangs the dot and dash line B and if the goose neck were constructed in the usual manner the periphery of the end of the overhang of the carrier would rub against the back wall of the goose neck. In order to avoid this, the goose neck is constructed with the chambered portion B and as the carrier is passing around the goose neck the overhang portion extends into this chamber B and the carrier slides on the rings E Having thus described the nature of my invention and set forth a construction embodying the same, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a receiving terminal for pneumatic tube apparatus, a transmission tube for carriers, and an open curved goose-neck located at the end of said transmission tube to receive the carriers, said goose-neck having a main part with a cross-area sui'ticiently large to receive the rings of the carrier and provided with a passage in its convex side curved to a greater radius than the main part of the goose-neck and having a crossarea sufliciently large to receive and clear the ends of the carrier as the latter moves around the curve of the goose-neck.

2. In a receiving terminal for pneumatic tube apparatus, a transmission tube; an open horizontally disposed gooseneck connected with said tube, curved to a comparatively short radius, having a main part with a cross-area sufliciently large to receive the rings of the carrier, and provided with a passage in its convex side curved to a greater radius than the main part with a cross-area suiticiently large to receive and clear the ends of the carrier as the latter moves around the curve of the goose-neck; and a table at the end of said gooseneck opening into the same.

In testimony whereof, I have signed my name to this specification in the presence 01 two subscribing witnesses, this 18th day of July A. D. 1907.

CHARLES I SIODDARD.

IVitnesses L. G. BARTLETT, A. L. i InssnR.

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