US592765A - casey - Google Patents

Description

(Nb Model.)

a T. A. CASEY. PNBUMATIQDESPATGH TUBE.

Patented Nov. 2, 1897.

6 avwmdto t m: ohms PETERS 0o. monxumo" wuumni'on, u. c.

. gas, preferably atmospheric air.

NITED STATES ATENT FFrcn.

THOMAS A. CASEY, OF NEW YORK, N. Y., ASSIGNOR TO FRANCIS W. JONES, OF SAME PLACE.

' PN EU MATlC-DESPATCH TUBE.

SPECIFICATION forming part of Letters Patent No. 592,765, dated November 2, 1897.

Application filed January 20,1897. Serial ITO/619,905. (N0 model.)

To all whom it may concern.

Be it known that I, THOMAS A. CASEY, a citizen of the United States, and a resident of New York, in the county and State of New York, have made certain new and useful Improvements in Pneumatic-Despatch Tubes, of which the following is a specification.

My invention is an improvement in pneumatic despatch or carrier tubes.

The object of my invention is to automatically cut off the propulsive current of air just before the carrier has arrived at its destination without interposing any mechanical obstruction in the path of the carrier, whereby I save wear upon and injury to such carrier. I provide an opening in the wall of the tube near the destined point or station. Surrounding this opening upon the exterior of the tube is a chamber, which may be cylindrical. In the chamber or cylinder is a valve having a piston or similar mechanical attachment. A spring or similar retracting device tends to force the valve into position to close the aperture or opening in the tube. imity to this valve there are two electrical contact-points, one of which is movable and has a spring tending to draw it into engagement with its companion contact. At the station starting or sending the carrier or at the point where is located the means for applying the propulsive air-current, or both, there is an electromagnet to control such means of turning on and off or applying the air. An electric circuit includes this magnet and the described contact-points.

The carrier in its passage forces air against the valve, which is thus caused to release the movable circuit-closing point or contact to close the circuit, energize the magnet,and cut off the propulsive air-current.

The accompanying drawing illustrates my invention.

P is a well-known arrangement of pneumatic tube.

R is a reservoir of any suitable compressed It is supplied through means of the engine E and cylinder and pump 0, of any well-known construction.

In prox- I have shown two stations, and Y. At-

X there is an electromagnet V M, having an armature a, carrying a bell-hammer. There is a bell or signaling device B. The armature-lever a is provided with a hook or catch it in position to engage with leverL when the door 9 is closed and the valve V open. At station Y there is a hole or aperture oin the side wall of the tube, surrounding which is a chamber or cylinder E. There is avalve d normally held against the hole 0 by means of the spring 5, said valve having a rod 1" fixed to it and extending outside of the box or inclosure E. This rod T has a hook or catch m upon its outer end, which holds the movable contact Z away from the fixed contact or stop 19. The movable contact Z is pivoted at 13, and a retracting-spring l4, acting contrary to the spring 5, tends to draw said contact Z toward the fixed contact 13. From the contact 19 a conductor extends to the terminal of the magnet M at the starting-station X, and from the movable contact Z a conductor 2 extends to the second terminal of said magnet. There isa battery MB located in said circuit, and when the contacts Z 1) are closed the magnet M is energized.

The operation of the apparatus is as follows: Referring to station X, when the carrier has been introduced for transmission to station Y the door g is lifted by hand and' closed, where it is engaged and held in position by the catch a on the armature-lever a,

valve V being simultaneously opened. As

the carrier passes station Y the. air in the tube forces the valve 01 away from opening 0, releasing lever Z, which contacts with stop 10, current passing via wires 1 and 2 to magnet M, which is energized and attracts its armature a, releasing the valve-lever L. Door g is opened by gravity, valve V closed, and

at the same time a signal is sounded whereby the arrival of the carrier at the distant station is made known.

hat I claim, and desire to secure by Letters Patent, is

l. The combination of a pneumatic tube, an opening in the wall of the tube at or near one station, an exterior chamber inclosing said opening, a valve in said chamber, a spring holding said valve in position to close said opening, a contact-point, a movable contactpoint, a spring tending to draw the movable contact into engagement with the first-named contact, a mechanical connection between the valve and movable contact, 111 cans for cutting off the propulsive air-current at a separated or distantpoint, an clectroniagnet controlling such means, and an electric circuit including said contact-points and magnet, substantially as described.

2. The combination of a pneumatic tube,

an opening in the wall of the tube at or near one station, an exterior chamber inclosing said opening, a valve in said chamber, contact-points controlled by said valve, means for controlling the propulsive air-current, an electromagnet controlling such means, and an electric circuit including said contactpoints and magnet,substantially as described.

3. The combination of a pneumatic tube, an opening in the wall of the tube at or near one station, an exterior chamber inclosing said opening, a valve in said chamber, contact-points controlled by said valve, a device for controlling an entrance to said tube, an electromagnet operating said device and an electric circuit including said contact-points and magnet, substantially as described.

THOMAS A. CASEY. \Vitnesses:

XVATER S. PLACE, F. W. J ones.

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