US1104228A - Regulator for pneumatic service systems. - Google Patents

Description

J. J. STOETZEL.

REGULATOR FOR PNEUMATIC SERVICE SYSTEMS.

APPLICATION TILED OCT. 11, 1911.

Patented J 1113; 21, 1914.

UNITED STATES PATENT orrron JOSEPH J. STOETZEL, OF CHICAGO, ILIJINQIS,- ASSIG-NOR TO PNEUMATIC TUBE APPLIANCE COMPANY, OF CHICAGO, ILLINOIS, ACORBOMTION OF ,ILLINQIS.

REGULATOR FOR PNEUMATIC SERVICE SYSTEIS.

Specification ofletters Patent.

Patented July 21, 1914 Application filed October 11, 1911. Soria1io.654,18i5.

To all whom it may concern:

Be it known that I, JOSEPH J. S'ron'rznL, a citizen of the United States of America, and a resident of Chicago, county of Cook, State of Illinois, have invented certain new and useful Improvements in Regulators for Pneumatic Service Systems, of which the following is a specification.

The main objects of this invention are to provide an improved form of regulating device for controlling the connection between a pneumatic transmission line and the source of power, whereby the line may be at all times ready for service at full power, altlumgh requiring but an extremely small amount of power during intervals of disuse; to provide a device of this kind which is automatic in its operation and adapted to practically cut oil the flow of air during periods when no carrier is in transit and to instantly start an adequate flow when a carrier is inserted into the line; and to provide a device of this kind which is readily adjustable to suit the requirements of lines of various lengths.

An il ustrative embodiment of this invention is shown in the accompanying drawings, in which F igure 1. is a longitudinal section of a regulating device particularly designed for use in connection with a transmission line of the suction type. Fig. 2 is a diagrammatic representation showing the manner in which the regulator is connected to a looped transmission line.

In the construction shown, two transit tubes 1 and 2 are arranged as in the usual looped line, so as to provide dispatch and delivery terminals at each of two stations. In the drawings, the station nearest the power plant is designated A and the distant one, B. At the station A the dispatch terminal 3 is normally open, butthe delivery terminal 4* is normally closed by a flap valve. At the station B, both tubes are normally closed and connected by a branch tube 5 so that in effect both tubes form a single continuous air duct.

The exhauster or other source of ower, designated by 4, is connected to the line by a suction branch near the delivery terminal 4- in the usual'manner and the regulator 7 is interposed between the exhauster and the transit tube.

In the formishown in ;the drawi the regulator comprises an outer cylin er or casing 8 and an inner cylinder or casing 9, the latter being referablyconcentric with the casing 8 an having itsinterion subdivided into two chambers 10 and 11 by a stationary partition 12. The lower end of the casing 8 is connected by a pipe 13 to the exhaustertand the upper end is connected by a pipe 14to the transit tube near the delivery terminal 4".

The upper end of the c linder 9 is open and 1s contmlledby a va ve 15. The side walls of the cylinder 9 are-provided with perforations 16 and l'fccnnecting the annular space 18 around said cylinder with the chambers 11 and 10 respectively.

The valve 15 is rigidly 19 with a piston 20, which is slidable in the chamber 11. The clearance space 21 in the lower end of the cylinder 9 communicates with the outer atmosphere through one or more passages 22.

An annular partition 23 separates the annular space 18 from the space 24 above the inner cylinder 9, and this partition 23 is slidable vertidally with respect toboth the outer and inner cylinders and serves for adjusting the area 0f the passage provided by the openings 17. There is a passage 25 through "the partition 23 which serves as a by-pass between the spaces 24 and 18, and this by-pass is controlled byta screw 26, by

means of which the minimum flr-wof air is regulated.

Theouter casing 8 extends a considerable distance above the t of the inner cylinder 9, and has mounted t sin a tubular member 27, within .which is slidabl cmounteda loose fitting piston va1ve28. is valve is carried by a sleeve29, .which is slidably mounted on the valve stem 19, and by conoonnected bya rod tacting with the valve 15 :limits the downward movement of the valve 28. The valve 28 is normally urged upward away .from the valve 15 by means of the spring 30. The outer periphery of thetube- 27.is coyeredby alayer 31 of suitabldfpascking I asleather, so as to have airtight fit withthe walls of theouter cylinder, alon which i the tube 27;:nay be adjusted vertica y.by.meane of set screws 32 which extend thmugh elets 33 in the easing 8. l The tube 27 has importion of-itsperiphery out away nearlthe upper end material, such J. 1 the leeet fiewnwerd 1 9H cimv-a ii restriction mtg cs uf the m it: egwnlngs C heh w the disk I; the air the 4m 28 MW is edges the I return 'm'wnnn time *1 pressure in H1, closed by a carrier,

air pressure below "valve 15. What t 40 in {he pm t e her with fut em avoid her 11).

"he IDILH. 45 28 18 to pun ha the val: U, pass s out Hi If" because it is tie: t Open 50 far that wh n 11 in 5 ou 50 tion, it will ufier m- "1m to the Ire-e How of air into the !U. are: it? therefore not be Rife in the rate of flow of the 2 Inally held in the p bitlun in win 55 shown by full lines in F5? 1 by 30, which hears bdw en "e! valve 15. \Vken tm Jek w the air max pass t'zthe ewe-11in 1M preemlre t pct) Wit! raise i n the upper limit ef its evexpen tand 1 the valve te the pesxtmn mdleeted ed tines 1n Flg. L allow. r the free I the eunveying air current 111 the line. i The maximum air flow may he regulated by shifting the ring 23 :50 to vary the efieethe area of the epemngs 17. As soon as the out. of the translt tube 1. the

REL and the {low of air 60 n mt. down as bevalve adapted to be shifted for omitted without departing from the spirit of this invention, as defined by the'following claims.

I claim I. In a transmission tion of a transit tube, cally arranged casings, the outer of said casings being connected to said tube, means con nected to said outer casing and adapted to cause a transmitting air current to flow through said tube centrically located with respect to said cas iugs, and coacting with the inner of said casings, for controlling the volume of said air current through said casin s, and a piston mounted in said inner casing and operatively connected to said valve, said piston being adapted to be actuated through variations in said air current for shifting said valves.

2. In a pneumatic transmission system the combination of a transit tube, a casing connected thereto, means connected to said casing' and ada ted to cause a transmitting air current. to ow through said tube and casin a partition located in said casing and so dividing it into two compartments, a controlling ommunication between said compartments so as to vary the volume of said air current passing throygh said tube and casing, and a pnston located in one of said compartments operatively connected to said valve, .24 Lid piston being adapted to be actuated by ariations in Said flow of air through said tube and casing, said partition having a assage leading therethrough for provitying constant communication between said compnrtments.

3. In a pneumatic transmission system the wmbina'tion of a transit tube, a casing cond the! to, means connected to said casted to cause a transmitting air :ow through said tube and cassystem the combinaa pair of concentriand casings, a valve coning, a partition located in said casing and subdividing itinto two compartments, a valve adapted to be shifted for controlling communication between said compartments so as to vary the volume of said air current passing through said tube and casing, a piston located in one of said compartments and operatively connected to said valve, said piston being adapted to be actuated by variations in said flow of air through said tube and easing, said partition having a passage leading therethrough for providing constant communication between said compartments, and means for adjusting the cross sectional area of said passage.

4. In a. pneumatic transmission system, the combination of a cylinder having one end connected to the transit tube and having its other end connected with a source of power, a second cylinder located within the first, a partition subdividing said second cylinder into two compartments, the upper end of said cylinder being open and said cylinder having openings in its side walls connecting each of said compartments with the space around said inner cylinder, a piston mounted in the lower compartment of said cylinder, a valve controlling the open upper end of said cylinder and connected with said piston, the space in said inner cylinder below said piston being connected with the outer air-,a second partition extending across the space between said cylinders and having a bypass passage, and means above said valve and adapted through an increase in the volume of air entering said casing to close said valve. I

Signed at Chicago this 9th day of October 1911.

JOSEPH J. STOETZEL.

Witnesses:

EUGENE A, RUMMLER, Enwzr PHELPS.

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