US1124505A - Pneumatic-despatch-tube apparatus. - Google Patents

Description

J. T. NEBDHAM. PNEUMATIC DBSPATGH TUBE APPARATUS.

APPLIOA'I'IOX'F'ILED APBz'I, 1910. I

Patented Jan. 12, 1915.

a Mums-SHEET 1.

al hl 'r 4454/ ATTORNEYS "N58868: k 0L J. T. NEBDHAM.

PNEUMATIC DESPATCH TUBE APPARATUS.

APPLICATION nun APR.7, 1910.

1,124,505, Patented Jan. 12, 1915.

3 SHBETS SHEEI 2.

% INVENTORJM BY A1,. ATTORNEYS J. T. NEEDHAM.

FNLUMATIG DBSPATCH TUBE APPARATUS.

APPLICATION FILE! APRJ; 1910.

1 1 24,505. Patented Jan. 12, 1915.

3 SHEETS SHEET ATTORNEYS UNIT-ED STATES PATENT OFFICE.

JOHN T. NETiEDHALLCF BAYONNEiUJEiF/JERSEY, ASSIGNOB, BY MESNE ASSIGNiY IENTS, T THEI JAIVISON COMPANY, OF NEWARK, NEW JERSEY, A CORPORATION OF NEW JERSEY.

memos.

Application filed April 7, 1910. Serial No. 554,010.

1 1 071 'u lzom itna a concern: -Bcit k' -"nvn that I; JOHN T. Nnnnrrnr,

a subject, the King of Great Britain, a

citizen of Canada, and resident of Bayonne, s 'cmmty of Hudson, and State of New Jersoy, have" invented certain newv and useful Improvements in Pneumatic-Despatcli-'ltlbe iipparatus, of whieh the following is a 'ssliccification. i',

One of the objects of this invention is to providean apparatus wherein a single transn'ii sioirtabe leading toa central station is provided with a plurality of terminals and a plurality of return or outgoing tubes extend trom the central station to the termib eing'drawn through the transn'rission tube and. then forced through the outgoing tubes, pand-felectiical means" being provided to confrol the operation of the air moving means.

' Another-object 'tle invention is to prowide-ani'improved and unplified electrically operated p-riiver contiol'ling meansailapted to be: actuated frgn'reaeh carrier receiving earsraudn or terminal, both at the central sta; tion and on the transmission tube, whereby an air blowerpor o means-m 'torbe transmittetl or returned to its proper i3Q.' t'e'ru-iirial;; aridwhereby: said air moving raneans Will'he'fstopped a p determined time wafterthe insertion (if-a carrier in any one of=the jsaid terminals;- Another object, of the invention is to prozvide a. sin' -plified and im'pi-oved timing l-ineans for controlling the-"operation'of the (motor-which 'd ves. the air blower or other suitable air inm'iii'g nieans, r Another object ofthe invention to proiavide an automatically operating mechanical docking means for holding the motor start- .1113;

determined time.

A further object 'of invention is to 'i provide-ia new and improved discharge ter- :mnmr on "the transmission tubethrough which *tlr' a'rriers will be delivered at the central-station.- i'

-Other objectsandadvantages of the invention will appear hereinafter.

- In the drawings, Figure 1 is a lnatic view of the appai t'ail 'vertiral scirtim ml-vicv\ of the receiving end of the ruztgoing tubes-f Fig. 2 "a front diagram- Specification of Letters Patent.

'nalsfon "the single transmissiontube iair 1 r snitab levair' moving" he set in mot on \vhena carrier;

.inission tube.

leans in its closed position for a pre;

isfFig. l a de:

Famous o'tthe timing means; Fig. 3" a plan "-PNEtIiviA'i'to-nEsPA'rcH rtrial: APPARATUS.

Patented Jan. 12, 1915.

view thereof: Fig. i a vertical sectional view on the line IV-IV of Fig. 2.; Fig. 5 a vertical sectional vview of the solenoid coil showing the solenoid core locking means;

Fig. 6 a vertical sectional view of the cendistant stations to the central station. This tube is open at its outer 'end and is provided with a discharge or delivery terminal 2. at the central station through which all of the carriers are discharged. To this tube at a pointbeyond the. central station is connected a rotary blower 3 driven by an electric motor 4 in the proper direction to suck air through the transmission tube 1. The pressure side of said blower is connected-t0 a pressure pipe 5 'which leades to .a central distributing station (3. This central station is usually arranged at the cashlcrs desk when the apparatus isyinstalle'd for store service. It \vill, th'erefore,1be seen that the blower sucks air through pipe 1 and ,forces it out through pipe 5 and from said pipe it is directed into any one of the outgoing or return tubes by means-of any suitable air switching device connected'to the end of said pressure pipe.

.The transmission tube is provided with a plurality of receiving terminals or stations 7, each receiving terminal being provided with a hinged door 8 which closes a carrier receiving opening 9 leading into the trans- In operation the door 8 is lifted to permit a carrier to be dropped lengthwise into the tube as i'ndicated in dotted lines in Fig. 1, said doors being then immediately closed. It isapparent that a carrier droppcd in any one of the receiving terminals in the transmission tube will be carried through said tube and delivered through the discharge terminalQ at the cen-' -tral station without interfering in the least 'l'zontal circular plate 10 which may be secured to the top 0,5 therashicns desk or otherwise suitably supported. This plate lOis formed with a series of apertures arranged in an arc struck from the center of said plate. Outgoing or return tubes 11, 12, 13 and 14 are connected at their inner or central station ends to said plate, and regis= ter with said apertures. The pipe 5 is connected to the centerof said plate and registers with an aperture'thcreiu. To the center of said :plate, and or. the upper side thereof is connected a pneumatic or tubular arched switch 1.5, said switch being swiveled to the plate at the center thereof by any suitable means, its outer end being so arranged that it may be swung over and in register with the openings leading to the outgoing or return tubes. It is apparent, therefore, that. air under pressure may be (lllECtBClflOlll pipe 5 intoany one of the outgoing tubes. Each of the outgoingtubes sion tube is adaptedto independently close the battery circuit through said. magnet.

' T The magnet 19 is preferablymounted on a diaphragm holder/2 0. Th'is' 'holder contains a diaphragm 21 which forms avacuurn-timing chamber 22, said chamber communicating with the pipe 1 through a small exhaust pipe 23 in which is arranged a small controlling valve-"24. The magnet 19 isaprovidcd with an armature 25 which is mounted ona lever 26, the upper end of said lever carrying a valve adapted to control a small exliaust' port 28 vleading into the timing chamber 22. 'Depending from the diaphragm is a rod 29 carrying near its lower end a weight 30. It is manifest that when the contacts of any one of the pairs of contacts 18 are brought together by means of the terminal door, or otherwise, the armature 25 will be attracted by the magnet 19 and the exhaust port 28 opnedthereby destroying the vacuum in the chamber 22 and permitting the diaphragm to be pulled downwardlyby the weight 30. \Vlien the terminal doors 8 are closed the contacts 18 separate, the magnet 19 1S deencrgized and armature 25 thereof released. thereby permitting-thevalve 27 to close, the lever 26 being so mounted that the'wcight of the armature will swing the valve closed when it is released from the magnet 19. A partial vacuum is produced in the vacuum chamber by the exhaustion of the air herein through pipe 523 and pipe 1.

Near the lower end of the lever 20, and

adapted to be engaged by it, is one of a pair of contacts 31', said contacts being so arranged that when the lever is moved to open the exhaust valve 27, contacts 31 will be brought together. These contacts are in circuit with the coil 32 of a moto starting solenoid, themotor circuitjbeing complcted by said solenoid through wires 33. t will, therefore, be seen that when the ex- ;haust valve 27' is open the motor circuit will be completed and the motor started to draw air through pipe 1 and force it out through pipe 5, and that as soon as the motor is started air is exhausted from the chamber 22. Y a

When the magnet 19 is deenergized' by the separation of the contacts '18 the lever 26 swings outwardly toclose the valve 27, and to permit the contacts 3l to separate, thereby breaking the circuit through the." solenoid coil. It is manifest that if some means were not provided for holding,the solenoid core in itsproper position to maintain the solenoid contacts in. engagement with each other, said core would drop and the motor circuit be interrupted, To hold the motor circuit closed, I provide a n chanically operating locking device to 10 k the solenoid core in its upper position. Said locking device consists of a pin 3%. projecting horizontally from the solenoidc'ore, a, spring 35 beingconnected to :said pin and to a part of the solenoid frame, said s ring serving merely to yieldinglysuspen the solenoid armature. Extending downwardly from the solenoid armature is a rod 36 carrying a rigid cross bari 3l at-itslower end. This cross bar'is provided-at its ends with depending rods 38 carrying collars 39, their lower ends extending through. guides 40. On these rods just below the cross bar 37 is a loosely supported contactbar 41, springs 42 being interposed between said contact bar and the collar 40-on the depeuding rods 38. The contact bar is provided near each of its ends with carbon contact points 43, which are adapted to engage fixed carbon contact points 44 suitably supported. One of the fixed carbon contaets is in circuit with one of the mains, the other electrically conncctedto the motor, the other side of themotor being connected to the mains. The purpose of loosely mounting the contact bar on'thc depending rods 38 is to permit the'armat'ure core to have an up- Pivrtcd onthe solenoid frame, or at any.

suitable point above the pin 34 is a locking lever 45 which extends below the pin 34 and has pivoted near its lower'end a locking pawl (3. A spring ti is connected to the lower end of this locking pawl and to the lever, and tends to force the upper end of said pawl outwardly into the path of the pin 34, whereby as the solenoidpawl, said pawl will be thrown by its spring under said pin, thereby locking the solenoid core in its upward position and holding the contacts in engagement until said locking pawl is released. By this means the circuit through the solenoid coil may be interrupted Without permitting the solenoid core to drop and without interrupting the motor circuit. The locking awl is provided with an upwardly exten in stop finger 48 which limits the movement 11% said dog under the influence of its spring, said stop finger being ar ranged to engage a part of the lever 45. This stop finger insures the locking dog stopping in position to engage the pm 34, and prevents the spring 45 throwing said locking dog outwardly beyond the pin 34. The lever 45 is provided with a laterally extending arm 49 which extends into the path of a pin 50 projecting from the weight 30 suspended from the diaphragm 21. it is manifest, therefore, that as said diaphragm is drawn up by reason of the vacuum created in the vacuiuu chamber, the pin 50 will engage the lateral arm of the lever 45 and lift it sullicicntly to release the locking dog from the pin 34, thereby permitting the solenoid armature to drop and separating the motor circuit contacts, thereby stopping the. motor. It will, therefore, be seen thatl provide electrical means for completing the solenoid circuit and starting the motor a mechanical locking means for holding the motor circuit closed, and a pneumatically operated means for releasing the solenoid core, and thereby breaking the motor circuit and stopping the motor. The advantage of providing a mechanical lock for the solenoid core so that the circuit through the solenoid coil may be broken the instant the solenoid core is drawn to its upper position will be manifest. It not only afl'ects a saving in current, but increases the life of the solenoid coil.

Each outgoing tube is provided at the central station with a trigger .31 adapted to be moved outwardly by the insertion of a carrier in the tube. Each trigger is provided with a cam which is arranged to bring contacts 53 into engagei'ncnt with each other to thereby complete the battery circuit through the magnet 19 for opening the venting valve.

The discharge or delivery terminal 2 at the central station is provided with two outwardly swinging doors 5" These doors meet at the center of the terminal and are arranged to extend inwardly and downwardly with respect to the vertical of the tube 1, and from their pivotal points they extend forward their forward edges meeting and fitting closely together in a plane passing llngitaulinally through the center of the til-be 1. Each dim-is p s ded atits pivot with a light spring .3?) uhich holds the door clos d and pi ed lightly against its cat, the terminal being so ioional that each door seats against an inclined surface 56. The doors are formed of leather or other suitable material suitably sccured in the metal hinge portions 57. Each hinge portion is provided with a rcarwardly extepdii'ig stop 58 which limits the outward swinging movement of the door. Below the carrier discharge opening formed an air inlet opening 59, both of these openings being closed by the terminal doors. The bject of this air inlet opening is to permit air to be drawn into the tube 1 when the doors are open and a carrier is being discharged through the discharge opening 58. If the said inlet opening were not provided air would be drawn in through the opening 58 when the doors are open thereby retard ing the discharge of the carrier, and at times preventing its delivery. The object of inclining the doors .34 and arranging them to meet at the center of the terminal is to have a carrier contact with said doors as near the center line of the terminal or the meeting edges of the door as is possible, so that said doors will swing open quickly and easily. Another object for dividing the doors as shown is that the doors need swing outwardly only a short distance before the car rier is entirely free of them. It is manifest that a terminal so constructed will operate almost noisclessly and rapidly, both in opening and closing, so that the amount of air admitted to the suction pipe during the discharge of the carrier will be very small. This is of advantage for the reason that any air admitted at the discharge terminal reduces the speed of the air and the volume thereof moving through the transmission tube from the receiving terminals.

Having thus fully described my invern tion, what I claim as new and desire to secure by Letters Patent is:

l. A pneumatic despatch tube apparatus comprising a single transmission tube, a pinrality of receiving terminals in said tube, an electric motor, means operated by said m0- tor to draw air through said single tube. a pipe connected to the pressure side of said blower, a plurality of return tubes. means to direct the air from the. pressure pipe into any one of said return tubes, a motor startinr solenoid, means adapted to be operated from any one of the receivin terminals to energize said solenoid, means For completing the motor circuit through said solenoid. means for locking the solenoid core with the motor circuit closed, and means for releasing said soleno d core after a predetermined time to open the motor circuit.

2. A pneumatic despatch tube apparatus comprising a wilhfl'lt transmission tube. a plurahty nl' ti v'lZlI terminals in said tube. an elect: i-s uioior. means operated by said motor to draw air through said single tube. a p pe counw l"tl to the pre sure ide of said biou r. a plaraiiliv of return tubes. means to direct the a r from the press-m pipe into any one of aid return tubes. a motor starting solenoid. H -His adapted to be operated from any one of the receiving terminals to energize said solenoid. means for completing the motor (.iltlilt tlHOllfJfll said. solenoid. means for autonniticallv locking the solenoid core with the motor circuit losed. and means for rclca 'ng said solenoid core afier a predetermined time to open the motor circnit.

3. A pneumatic despatcl. tube apparat 15 comprising: a transm ssion tube. an elcctr motor, means operate. liv said motor to move air through said tube. a motor starting solenoid, means to complete ihi: solenoid cir cuit, means for compl l ing the motor ircuit through said soh noici. means for locking: the solenoid core with the motor circuit closed, and means for releas ng said solenoid core after a predetermined time to open the m0- tor circuit.

4. A pneumatic despitrf: tube apparatus comprising a transmission tube. an electiic motor, means opeial il in sa d motor to move air through said tube. a motor starting: solenoid. means to complete the s iileno d circuit. n cans for compl t ng thc mot r ircuit throne-a: said solenoid. tlillfillltli 'filllv operated means for lo mg the soil-nod core with the motoi circuit closed. and pneumatically opecated means tor reloa iug said solenoid core a ft c a predctei mined time to open the motor ircuit.

A pneumatic despatch tube appaiatus comprising a single transmission tube. a rer-eiviug terminal therein. an electric motor. a l)lO '\("l for moving air through said tube and operated by said motor, a motor start. in; soleno d. a pair ol contacts for complcting; the soleno d circuit. a vacuum chamber. a diaphragm ther in. -l weight. conne ted to said diaphragm. :i v nting valic for said vacuum chamlrr. an electrically operated devic for o ening said venting valve. and closing the solenoid coil circuit. means at the terminal for closing the circuit through said electrical device. a motor c rcuit arranged to be closed by the mo ement of the solenoid core into the solenoid coil, an automaticallv operated locking device. for locking said core in said coil to hold the motor circuit closed. means t'or moving the diaphragm in tho diaphragm chamber. and means operated bv said' diaphragm to release the solenoid Core locking means and thereby open the motor circuit.

6. A pneumatic dcspatch tube apparatus comprising a transmission tube, an electric motor. a blower for mo\ mg air through said tube and operated bv said motor. a motor starting solenoid. a diaphragm chamber, a diaphragm therein. a venting valve for said chamber. an electi'x-callv operated device for opening said venting valve and closing the solenoid coil circuit. means for closing the circuit through said tievicc. a motor circuit. arranged to be closed by the movement of the solenoid core into its coil, an automaticallv operating locking device for locking said core in said coil to hold the motor circuit closed, means for moving the diaphragm in the diaphragm chamber, and means operated bv said diaphragm to release the solenoid core. locking means and t-Le'ebv open the motor circuit.

7. A pneumati despatch tube apparatus comprising a transmission tube. an electric motor. a blower for moving air through said tube and operat d by said motor, a motor starting soleno d. a vacuum chamber. :1 diaphragm therein. a ventlug valve for said vacuum chamber, an electrically operated device for opening: said venting valve and closing the circuit through the solenoid coil, means for closing the circuit through said electrical device. a motor circuit arranged to b.- closed by the movement of the solenoid core into the solenoid coil. an air pipe connecting the! vacuum chamber with the suction sid of the blower, and means operated by the dla iihragzm to open the motor circuit.

A pneunratic despateh tube apparatus (OfilPflSlYliI a transmission tube, a blower for moving air thcrethrough, a motor for operating said blower and a timing means for said motor consisting of a solenoid, means for completing the solenoid circuit, means connected to the solenoid core arranged to complete the motor circuit when the solenoid is operated. an automatically operating latch to lock the core in the solenoid coil. a lever carrying said latch, and means adapted to be moved by the motor for releasing said latch.

9. A pneumatic despatch tube system comprising a transmission tube, a motor, a blower operated by the motor to move air through said tubc. a diaphragm chamber, a pipe connecting said chamber to the tube whereby air will be moved through said tube by the blower. a solenoid. means operated by the solenoid to close the motor circuit. a venting valve for the diaphragm chamber. means for operating said valve and closing the solenoid circuit, a latch device for locking the solenoid core in its coil, and means operated by the diaphragm to rcleasc saidl-ztrh to open the motor circuit.

10. neumatic deepatch tube apparatus compi l; .4 :nglc transmission tube. a ;'.-:i:;: F of ."P- mung: terminals in said tube,

- motor, a blower operated thered ran air ll pllll'lil a prewar; pipe hraiiirq from the ill arm; nlmal le arcane, to; ta .tszc lin the said uwsurc pipe to any one oi the return tutu; a. \i icuurl :hamhcr. a liapl 51 n thcr in. a \cutim; valve for said chainher. a pipe ,onncctine' aid (hand er to the suction side of the blower. a motor stating: sole noid, electrical means adapted to he operatcd from any on of the receiving terminals to open the venting; alve and clone the Solenoid circui mun antomaticall opeia'iting latch to lo i-z the fltl'uilll core in its coil, means carried by the said core to clone the motor circuit, and m ans operated by the diaphragm to release the core lochinglatch.

ll. A timing device for pneumatic des patch tulie apparatus COIIIl YI'lSlDQ' a vacuum (illflllllltl, me; us for drawing air from said chamber, a diaphragm in said ehamhcr, a venting valve for said chan'ihcr, a motor starting solenoid, means for opening said venting valve and closing the solenoid 01rcuit. an automatically operating latch to lock the solenoid core in its coil. and means operated by the diaphragm when the proper degree of vacuum is produced in the vacuum chamber for releasing the latch and thereby opening the motor circuit.

79. A timing device for a pneumatic (les patch tube apparatus cv'iniprising a vacuum cl'ian'iher, a diaphragm therein, a, venting valve in said chamber, a le\ er carrying said valve and normally biased to closer said valve, :1 motor atarting solenoid. menus; to open the waiting valve and close the solenoid circuit. on automatically operating latch to lock the solenoid core within its coil, a releasing lever, and means carried by the diaphragm for moving said releasing lever when the proper degree of vacuum is produced in the vaculun chamber to tree the solenoid core and thereby ()lJt'll the motor circuit.

13. A timing device for a pneumatic (ltF- patch tube ap 'iaratua ouipriaing a d iphragm chamber, a diaphragm therein, a venting who for said 'lxllllllltl. a le er can r vinn said valve, and normally l)l \.-Lil to hold v aid valve closed. a motor starting solonoidi nuans tor opening the venting xalvs and closing: the solenoid circuit. an automatically operating locking latch to loc r the core within the coil. a relcaz- -ing l v r carrying Sflltl latch and means operand hy the diaphragm to swing said lever and thereby relchae the solenoid core to open the motor circuit.

H. A timing device for pneumatic despatch tuoe apparatus eompri ing a, vacuum chamber, a diai'ihragm therein. a right connected to said diaphragnn. a vcnting valve, a solenoid, an elmtrically operated means for opening the venting vahe and i circuit. a motor circuit i1; mica-will a halting deiiro to ltu'li tln' z olc1 cl "or r itinn its coi :1 leicr c:\"l";ui1;.- 14' long lei l 'c, and means vln-rclu il cn the diaphragm is lulbttl aid g lever \iill lir Mn in; i-pon rte pilot and the cnoid loc t'ng dci ice rclcarlcd to open the motor ci cuit.

A ll.":ll l l ii-ihe apparatus coinprising a iransnumuu t the 'L discln r ge or delivery terminal therclu r-Xtlt'l terminal consisting of a pair of lt l. one hinged at tJCll side of the terminal owning mid doors inclining on their olltlr fares inwardly and do\\n- .vardlv, and in transverse se tion inclining outu'ardl and rrsrrivardly with respect to the direction of moien'ient ot' the carrier, the two doors meeting; on a plane running longitudinally through the tube, whereby the cariicrs niil strike Ftlltl doors near the 35 center or riveting liac thereof and the car trier-s, ill he quickly released by said doors.

1 3. A pneumatic dcspateh tulie HPPRIUUIS comprising a single tizilltillllSSlOl'l tube, a plurality of receiving terminals in Raid tithe, an electric motor, means operated hv said motor to dra air throuflh said single tulle, a pipe connected to the pleasure al l le ol Haiti blower, a plurality of return tnhcsn means to direct the air from the lll'tnhillil. pipe into 98$ any one of the return tulica. an elertioniirm nctic motor starting device, means arrn to be operated from any one of the nil-raving terminals to energize said starting device, means for automatically itit'hlllil' .ii.l r-lec- 10G tromagnetic d vi e to hold the motor circult closed, and means for automatically releasing said electroazr V u-tic (ll-vice alter apredctermined time to open the motor circuit.

17. A pncuina1' dwpatcl l' ll'W' apparatus con'iprising a single trans llS ln tul e, a pluialit; ol' receiving, terminala in said tul e, an electric motor. .in in operated l1) aid mot to than ail; ihr ugh mid air i tale, a pint conne ted to the '(fflilt-l side of s id. illo cr. a pluralitv of return tulics, mcatra to direct tiic ail fro the prcfaurc pipe into any ou ol' said r turn tulufa, an ole-tro-v niafjnctir notor nailing device carrvin; a pair of contacts and adaptcd to complete the motor l'llt' llt through 1 aid coutacta, moans tor u l otnuthally locking raid devi e,

'to hold the contactin engagement and t e the contacts in engagement and the motor circuit complete, and means for reloasirg said locking device alter a predetermined time to open the motor circuit,

1 A pneumatic despatch tube apparatus comprising a single transmission tube, a receiving terminal therefor, an elect c motor. a blower operated by said motor for moving air through said tube, an electronnwinetic motor starting de\ice carrying a pa of contacts arranged to complete a motor circuit, a vacuum chamber, a diaphragm therein, a Weight conmcted to said diaphragm, a venting valve for said vacuum chamber, an electrrally operated device for opening said venting valve, means at the rccoving terminal for closing the circuit through the valve opening device, means operated by the valve opening device t close the circuit of the motor starting deice, an automatically operating device for locking the electromagnetic device to hold the motor circuit closed, a pipe connecting the diaphragm chamber to the blower, and ireans operated by said diaphragm to re lease the said locking means and thereby open the motor circuit.

211A pneumatic despatch tube system compzising a transmission tube, a motor, a blower operated by the motor to move air t uolltfl'l aid tube, a diaphragm chamber, a pipe connecting said chamber to the blower wheieby air will be moved through said pipe by ihe blower, an electromagnetic device, means operated by said device to close the motor circuit, a venting valve for the diaphragm chamber, means for operating said valve and closing t e "c1:i; of the said electromagnetic device, a lat h adapted to lock the said device to hold the motor circuit closed, and means operated by the diaphragm to release said latch to open the motor circuit.

21, A pneunatic despatch tube apparatus ctnnprising a tiansmission tube, a blower connected thereto, a motor for operating said b o er, a m'tor starting solenoid,

means to t(II"lPllL- said solenoid circuit, means hereby the solenoid core will comci the motor circuit, on automa ically op i ng ill] to lock the core within its rd guermatically operated means for wing said latch and opening the motor circuit,

A gmeumati': despatch tube apparatus coznnxfng a transmission tube, a blower cornered thereto, a motor for operating 'sali l waver, an electro-magi'letic motor starting device, means. to complete the circuit for said eh.rtro-magnrtic device, means when v the said device will complete the motor circuit, an automatically operating latch to lock said de ic :4 hold the notnr ci' ut closed. Hull pm maf allv opt-rating :11: connected to the u t on s nk f 1b for a pro chanical means lor lnildin'; mid c rcuit closed and uni-ans for rclesmi 11 :l holding means alter a predotormnnu Una:

2%. A pncunmiic ill-watch tube apparatus comprising a transmission tube, .1 lllUlUl. a blower o 'icratcd by the motor to move sir through said tube, a diaphragm whamlaar, a pipe connecting said chambei to the blower whereby air \viil be moved through said pipe by the blower. an electro-nmgnclit: do vice, means operated by said do i e to close "the motor circuit.v a venting valul'or in diaphragm chnmlwr, an cl rtric ale-inc l or opcrating said valve and riding the c wait of the elcctro-magnetic diwicc, a tcrnifial door in the trznnmission tldn, ib-l means whereby the circuit of the ciwsizn: dczice for operating the ventingvalve nill he closed when the terminal door is opened.

25. A pneumatic despatch tube app 'atus comprising a transmission tube. llilillS for moving air through said tube, a solenoid for controlling said air moving means, means for completing the solenoid circuit. means for locking the solenoid core t h ld the air moving means in operation and means to release said solenoid core locking means after a predcteriniimi time to step the air moving means.

20. A 'incuinatic tit 'mlt'li tori apparatus comprising a transnnsszon tube, a s means for completing the solenoid circuit, means whereby the solenoid core nill cow trol the movement of air through sa d tube, means for automatically locking the solenoid core after the solenoid circuit is completed, and means for releasing the solenoid core locking means after a predetermined time.

27. A tiansfer tube stem comprising a. transm ion tube. a receiving terminal and a discharge terminal, an air pump connected to aid transmission tube, an ele tric m tor for operating said pump. clcctri al moans ontrolled from the r w r ng terminal for operating said motor, means for directly locking the motor circuit closed and means for releasing said locking means and ihercby stopping the motor after a fn'edetermined time.

28. In a pneumaticdespatch tube system the combination with a transit tubing of an air moving device, a notor for driving it, motor controlling means responsive to the carr er insertions in said transit tubing for insuring the operation in" the motor, means for lfi 'lill the IHHUH' 1 means in its ipcrative i osi! R2) of the collarsalrn irl cirrznit and means for releasing lung means a predetermineti minimum time intarvul fulluwing each carrier inner Lion and lniilBPflltlQlit 0f the actual travel of thc inserted carrier 29. In a pneumatic despatcn tube system. tlw rninhinutmn with a transit tubing. at an air nim'ing rlevirra an electrin in itur f0! rlrii'ing sa'rrl rlmir, means at each carrier Y'UCPlYIHg sl'ati in in the transit tubing for mmringz; this nperation of the mntcr, means For rlircrtly lcmhing the motor cirruit closed and moans for releasing said inching means aifwr a prurieterminot time interval, said means being intlepeinlent (if the actual travel of the carrier,

30. A pneumatic tlespntnh tnl r apparatus com iirising a single transmisnibn tube, a plurality of receiving term main in said tube lwtwrcn its inlet and its discharge enllsr an rlwtrir motor, means operated by said an tnr to rlrnw air through sairl single tube, a Flirt: connrrtrd to the pressure side 01 said winner, a plurality of return tubes, means to direct the air from the pressure pipe into any (mu ul said return tubea, a mutur gtarting solrnonh X'biitlflS zula iturl to be l ltl'fliill l'imu any mu: hf the receiving: terminals to muii'giz'e said Hlll'ilfild.

iii. A piucuniatii: rlrspattrh tul a; warning min mising a single transmission tunr, a pin mlit f rureii'ing torminalx in saiil lulun an nlmtrir momn a blower upcrutrrl ii said nmt tn' tn draw air through 5t\l(l singlc tube,

a. pipa cannectecl t0 time pressure Sidi. of said blower, a plurality 0f return tubes means to direct-the air from the pressure pipe into any one 05. said return tubes, a nmiur starting solennid, means adapted to be operated from any nne of thr receiving terminals to eneig-izc said sulcnml, and means for completing the niotur circuit through said solenoid.

32. A transfer tube apparatus comprising a i ansini sion tube a discharge 01 delivery terminal therein, ;"'t1l'l trrininul Consisting 0F :1 pair 05 tlnmv, hinn'wi a! earl). sirh: Pf the terminal ripening. Sillll 0001's inclining on their outer laws inwardly and lmrnnaully and in transverse srrtinn lnrlining mam a1 clly and roarn'ardly with reaprrt to list: direction of nrm'onumt of the carrh r, an air inlet into thr tralunnissinn tube :uliarnnt thrcarrier ii:.--'rliar;:o oprnin sairl inivt l,-ill,{ norinaily (ZlOSt'kl in said doors. the two imam meeting in a plane running lung:turlinally' through the tube, whereby the carriers will strike said doors near the center or meeting line thereof, and said carriers will he quickly released by said doors.

in testimony wlrsrr-uf I hereunto my signature in he presence of two mine .LS this 32th day of April, .1910.

JOHN T. SBEDKLKM.

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