US1036892A - Station-indicator. - Google Patents

Description

A. J. 6: P. J. PANGRATZ.

STATION INDICATOR.

APPLICATION FILED 0OT.27, 1909.

Patented Aug. 27, 1912.

4 SHEETS-SHEET 1.

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STATION INDICATOR.

APPLICATION FILED 00127. 1909.

1,036,892. Patented Aug. 27, 1912.

4 SHEETS-SHEET 2.

E I? i 3 50 96 37 i 98 99 E Q E 97 i WI TNESSES IN VENTORS A. J. & F. J. PANGRATZ.

STATION INDICATOR.

APPLICATION FILED 0GT.27, 1909.

Patented Aug. 27, 1912.

4 SHEETS-SHEET 3.

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1% 6? EJ. PanCra/Z A. J. & F. J PANORATZ.

STATION INDICATOR.

APPLICATION FILED OOT.27,1909.

1,036,892. Patented Aug. 27, 1912. 4 SHEETS-SEEET 4. /,0 m Mi 9 /6 5 29 Ed 0 /4 /5 A9 3 5 2/ 20 I I /f WITNESSES mi. i

TORNEY.

UNETED STATES PATENT @FHCE ALEXANDER J. PANCRATZ AND FRANK J. PANCRATZ. OF DENVER, COLORADO.

vices as STATION-INDICATOR.

To a Irv/mm it may concern.

Be it known that We. ALEXANDER J. PAN- CBATZ and FRANK J. Paxcm'rz. citizens of the United States of America. residing at Denver, in the county of Denver and State of Colorado. have invented certain new and useful improvements in Station-lntlicat'crs. of which the following is a specification.

This invention relates to certain new and useful improvements in apparatus by which the. stations along a line of railway or the streets intersected by a car-line. will be successively displayed at one or more points in the vehicle so as to be plainly visible to the passengers.

The object of the present invention which is more particularly a-rlapted for use on eler:

tric railways. resides in the provision of a i system of cooperative devices which are actuated by the closinr or opening of an electric circuit which connects with the sour-cc of electricity by which thrvehicles moving along said miiways. are impelled. and which serve to intermittently move a curtain upon which the street-names are placed in successive order. a distance equal to that be tween two consecutive names.

The invention consists to this end. of a motor by which the curtain is actuated. means whereby the movement ot said curtain is autol'natically arrested after it has traveled the required distance, an apparatus which will automatically break the motor-circuit should the contact by which it was completed. be proloi'iged beyond a pie determined period. switches controlling the various circuits included in the system, a contact device by which the operating circuit is closed or broken, a non-reductive resistance coil and such other electrical deare essential to assure the successful and positive operation of the system.

When the apparatus is used in connection with an electric ailway operating by the overhead wire-system. the circuit or circuits in which said apparatus is included. maybe closed -or opened by cooperative contact devices respectively secured on the means by which the overhead wire is supported and on-the trolley pole which connects said wire with the motor of the car; on cars impelled by the 3rd rail system. these contact-de vices are connected with the third rail and Specification of Letters Patent. Application filed October 27, 1909.

l l l 1 l l l Patei'tted Anger. 1.912. Serial No. 524,510.

with the contact arm projecting from the vehicht'. while on sttwage-battery cars, or, if so desired: an the other cars as well, the operatmg by the hiotorman in charge of the vehicie.

Ah embodiment of our invention has been illustrated in the acconwrmnying drawings in the various views of which like parts are sinilarly designated and in which- Figure '1. shows a diagrammatical repre- SI11JtllOI1 of the electric circuits and cooperative devices employed in the system. Fig. 2. a plan view of the t'iperating niccha nism by which the movements of the indicative curtain are controlled, Fig. a section talten along: the line 33 Fig. 2. looking in the dire tion of the arrow 1/. Fig. 4, a similar section taken along the same line but looking in the direction of the arrow 0. Fig. 5. tl'tt!l. '\'tl' section along the line a Fig. 3. Fig". ti. a similar section along the line (1 6 Fig. Fig. 7. a View SllOWlHQ.

a portion of an oveohead wire and the trolley engaging the same. together with the eooperative devi es by means of which the operating circuit o't our system may be closed. Fig. 8. a section taken along the line 88 Fig. 7. Fig. a view of the overhead wire and trolley. adapted to open instead of close the circuit above referred to. Fig. 10. a diagrannnatic view showingmodifications in the electric circuit and the main switch when the arrangement shown in the. preceding; figure is employed. Fig. 11. a side View of .the contact-devices employed in connection with a thirdrail system of impelling electric railway ears, Fig. 12. a section taken along the line l212 Fig. 11.. Fig. 13,11 sectional fragmentary view of a car showing the mechanical elements included in the system in their relative positions. Fig. 14, a section taken along-the line 14-14 Fig. 13. Fig. 15, a transverse section through the curtainsupporting and winding apparatus taken along the line 1: -t5 Fig. 14: and drawn to an enlarged cale, Fig. 1b, a section taken along the. line lo -t6 Fig. 15 and Fig. 17, a section taken along the line 1717 Fig. 15.

Our improved indicating apparatus coinprises two elements A and B, the former of which is designed to support and display the movable curtain upon which the streetnames are placed. while the other is adaptt n-c'uit oi our system may be controlled portion serves to ed to actuate and otherwise control the movements of the mechanism included in the first named element,

The element A consists" of a suitable casing 2 in which four rollers 3, 4, 5 and 6 are revolubly supported at diagonallyopposite points. I

The curtain 7 v pon whose outer surface the names of the streets are successively displayed, is secured at its extremities, u on the winding rollers 3 and 4 and is stretc ed around the idle rollers 5 and (3, so that its in between the latter extends vertically before a window 8 in the front side of the casing, through which the street names are exposed to view. I

The roller 3 is revolubly mounted upon an axle 9 and has an axial recess for the rece tion of a coiled spring 10 one end of w. ich is secured to said axle while the 0 posite extremity is connected with t e roller.

The winding roller 4 which is disposed subjacent the spring-roller 3, carries upon its shaft 13 a sprocket wheel 12 by means of which the curtain-moving element A is connected with the operating element B. The roller 4 which is loosely mounted upon the shaft 13, is connected with one member of a clutch 14, the other member of which is slidably mounted upon the shaft, to rotate in unison therewith, and is supported on a rocker arm 15 which connects by mcans of a link 16 with an operating lever 17.

A brake-arm 18 is connected with the rocker arm 15 to arrest excessive movement of the roller 14 by engagement with the peripheral surface of a flange 19 forming part thereof.

A ratchet wheel .20 mounted upon the shaft 13, is engaged by a pawl 21 to prevent retrograde motion of the roller, while a coiled springEZ'Z surrounding the shaft, resiliently maintain the moving clutch member and the therewith associated parts in their normal position.-

The mechanism above described is provided towind the curtain 7 from one roller onto the other when the car, having reached the terminus of the line, returns along the same route.

The spring 10 in the roller 3. having previouslv been wound by any suitable means,

through the instrumenhold in tension tality of the curtain, by means of the with the roller ratchet and pawl associated ,4. whose clutch member, itwill be understood, is normally engagcd by the clutchnu-mlmr on the arm 15 through the expansive action of the spring To rc-wind the curtain 7 upon the roller 3 the clutch memb gs are disengaged by p acing thclcver 17 arid the therewith as sociated parts in the osition shown in Fig. 1? of the drawings, t us allowing the roller 14 to rotate about the shaft 13 with the result that the spring 10 is released and by its torsional action, imparts a rotative movement to the roller 3 upon which the curtain is wound.

The idle roller 5 is composed of insulating material and is provided with two series of alternately disposed metallic strips 23, which project from its ends oppositely along its peripheral surface and terminate a short distance from the opposite ends. Each series of strips is integral with a cap 24 into which the respective end of the roller is inserted and which terminates in a sleeve 25. surrounding the shaft 26 upon which said roller is mounted. The two sleeves of the caps '25, are in constant en- Ezgement with contact brushes 27 which ing mounted upon the casing c2, constitute the terminals of an electric brake-circuit included in our system as will hereinafter he described. The means for completing this circuit are provided by metallic plates 28 which being preferably secured ugon the inner surface of the curtain are a aptcd to simultaneously engage two of the alternate trips 23 of the two series placed upon the periphery of the roller. 5, when assing around the latter.

To increase the commer ial value of the apparatus, the various rollers may. if so desired, be divided by flanges 2!) into two sections upon one of which the st rcct-namcdisplaying curtain 7 is supported. while the other carries a similar curtain for the dislay of advertising matter.

The operating mechanism comprised in the element B of the system, includes an electric motor 30 whose shaft 31 carries a worm 32 which engages a wormwhcel 33 loosely mounted upon a transverse shaft 40.

A clutch 31 is composed of two members one of which is connected with the wheel -3 while the other is slidably mounted on the shaft 40 so as I with and is movablysupportcd upon the upper end of a rocker arm which is pivotally mounted in a bearing 36 upon the floor of the casing 37 inclosing the operating mechanism. The arm 35 connects with the movable core of a solenoid 38 and with the extremity of a spring 39 which serves to maintain it in its normal position when the two members of the clutch 34 are out of engagement. The shaft 40, which is revolubly mounted on standards 41, carries upon one of its extremities, which protrudes beyond the casing 37, a sprocket wheel 42 which, when the apparatus is in operation. connects with the corresponding wheel 12 of the element A by means of a chain 43 (see Fig. 13). An electromagnetic. brake 44 including a solenoid 45 and the therewith associated cooperative shoes 46, is disposed so as to act upon a brake wheel 47 on the will unumwhaiwn. u

to rotate in unison there no the .noeeeez motor shat 31 for the purpose of arresting the rotatory movement t-hereo'l after the curt tain 'i' has traveled a predetermined distance over the rollers comprised in the element A. The shoes to of the brake 44 are mounted atv opposite sides of the wheel ll, upon levcls 46 which are fulcrunied attheir lower extremities while their upper ends are connccted with the core of the solenoid so as to be drawn together during longitudinal movement of the same. it spring it) is applied between the levers to to return the shoes to their normal position when the circuit in which the solenoid is located, is broken.

The electrical connections between the brushea and ti" solenoid to with the therewith cooperative parts of the mechanism are controlled by a contact-breaking contrivznicc it) the construction of which will now he described.

tlperatiiciy connected with the motorshaft 31 is a ,e ovcrnor 48, whose sliding sleeve ('al't'ics a disk 50 which engages the upright arm of a bell crank 51. The opposite arm or" i l: crank is provided with two insulated buttom fr. and 53 arranged to respectively cu -age with re -ilicnt contacts 5% and 57; which are secured upon the bottom of the casing 37. A spring it serves to reailiently maintain the bell crank in engage ment with the disk.

When the motor travels at high speed, the

consequent inward movement of the sleeve 4-9. induced by the centrifugal action of the halls included in the governor, will cause buttons 52 and 53 to engage thesprings 54 and while when the motor is deenergizcd and the rotatory shaft is .il'l'l5ltd by the brake 44. the spring 5 will cause the bell crank to follow the outward movement of the disk 5t) with the re ult that the conta t between the buttons and the springs is brok n.

The YHIIOEIS m mbers of the operating mechanism which controhv the movements of the curtain T. are en rgized through the agency of an elltrat-magnetic switch 57, subsequent to the closing or breaking of the main operating circuit. by means hereinafter to be described.

The switch best shown in his. .3 and t of the drawings. includw two electiii-magnets 5S and 5?) wh se axe 't'\'lt'htl at right angles to each other. The armature of the tint named magnet 'l ulliF part in" an arm E0 wholly or partially etnipowl insulating material.

which i--z t'ulcriuucd at its extrem ty upon a e'dandarl til. The arm (30 carried in prbk iniity t its lretextremity, two insulated buttons 2:? and hi; hhi hare normally in migagem ni with two superposed contacts fli and To wcurcd upon an insulating up right thh'while one of thcse'huttons, 62, is

movement of its.

above referred to. which is:

the one described, may be placed at the opextended below the lower edge of the arm to engage two contacts as and supported upon the same upright. til, when the electromagnet 58 is energized and the arm is, in consequencein its lower position. \L apring (i7 connecting the arm with an extension (38 of the upright 6- serves to maintain the former in engagement with the contacts (it) and when the circuit in which the magnet 58 is placed, is broken. The armature of the second magnet 55) is secured upon an upright arm 71 which is fulcrumcd at 72 upon the bottom of the casing 37, and whose upper extremity is hook-shaped to engage the corresponding end of the arm no when the latter is in its lowermost position. A

spring 73 is cn'iployed to resiliently maintain the catch 71, in its upright position when the magnet 59 is deiincrgized. 'lhc lunction of the ant described portion of the .-witch 57, is to maintain the arm (it) in the dcpressed position after the magnet 58 is deencrgized. until by complction,ot' the circuit of the second magnet 59 the catch T1 is drawn from contact with the end of the horizontal arm (30. When the car approaches an intersecting street or a tation the circuit by which our apparatus is oper ated is cloned or broken by lllllllltlllt'flfi the construction of which llt 't'fieztl'llv 'variw in accordance with the nature ol the vehicle on which our system is lllntllllttl.

In Figs. T and 8 illustrated the means used in connection with a car operated by electricity supplied through an overhead conductor 74. The transverse cable 75 from which said conductor is suapcndcd is used as a support for a frame To in which a button 77 is horizontally movably disposed. A spring 78 serves to resiliently maintain thebutton in a projected position, while any suitable means may be employed to connect the latter or the frame with which it is in contact, with the conductor 'Tl. The harp 79 of the trolley 80 is formcl with a protuberance 81, into the path of which the head of the button 77 projects, and which is electrically connected withthc operating circuit of our aystem by a wire passin; through the hollowtrolley pole, or other means.

it desired, a second button, similar to positc side of the conductor it to insure the positive contact of the protuberance twl.

(in cars moving along tracks equipped with a third rail 82 (see Fig. l1 and 1:2). a resilient contact 83 may be suspended iron] the guarda'ail 84, to be engaged by a bevel-faced contact 85 on the arm 86 which projects from the vehicle.

When the mechanism by which the curtain-movements are controlled, is actuated by the breaking instead of the closing of a circuit, the desired result may be. accomgaging contacts on (luctor 98 Fig. 9).

4, 1,ose,so2

the ground or return conductor 103 by means of a conductor 104. The wire leading from the contact device on the trolley pole, is designated by the numeral 105 and connects through the contacts 98 and 99 of the interrupter 94, with the magnet 58 of the main. switch 57. The opposite end of the electromagnetic coil 58 is connected with the ground by a wire 106 and a condenser 107 interposed between this wire and the conductor 105, serves to store electric ener while the contact is being made there y causing the magnet to act for a prolonged period on its armature. The solenoid 95 comprised in the interrupter 94, is placed in an independent circuit, the wires 108 and 109 of which connect respectively with the wire 105 of the main operating circuit and with the ground. The releasing magnet 59 of the switch 57 is connected by a wire 110 with a conductor 112 which leads from the trolley feed wire to the contact 62 on the arm 60, and which conn cts by a wire 113 with one of t ie brushes 2 of the element A. The motor 3 is included in a circuit with the ground and the contact 62 of the switch 57, by means of wires 114 and 115; the clutch-magnet 38 'is connected with the ground by a wire 116 and with the contact 66 of the switch by a conductor 117 and the solenoid 45 of the brake 44, is included in a circuit by a wire 118 leading to the brush 55 of the contact breaker 49 and a conductor 119 which connects with the contact 69 of the switch 57. The opposite brush 27 of the element A connects with the brush 54 of the governor-controlled contact breaker 49, by a conductor 120 and the two buttons 53 and 52 on the bell-crank 51 included in said device, are connected'fwith the ground by wires 121 and 122. The button 63 and the contact 66 of the main switch 57 are electrically connected by a wire 123 and the contact of said switch is connected by means of a conductor 124 with a non-inductive istance 125 whose opposite pole connect with the ground by a wire 126. The function of the resistance is injury due to induction.

In addition to the electrical devices above described, we provide a number of manually operated switches which place the entire system under absolute control of the crew of the car or train on which the system is inrepresentation shown in Fig. 1, in which the stalled. Two of these switches, designated various circuits employed in the system are E, in Fig. 1 by the numerals 127 and 128, conreprescnted by different delineations and the meet with the conductor 105 of the main various mechanical and electrical devices by circuit and with the wire 112 of theclutch conventional symbols.

Let the numeral 101 designate the f eeder by which the elect-ricityurequitbd to limpel the vehicle upon which our system is m-. stalled, is conducted to the overhead wire 74, from the dynamo or other source of electricity 102 whose opposite pole connects with plished by securing insulating strips 87 at certain intervals. upon the overhead con- The wire leading to the operating mechanism is, in this case, continuously in electrical connection with the overhead conductor except when the trolley engages the insulating strip 87, and the construction of the'automatic switch 57 is modified as illustrated in Fig. 10. The electromagnet 89, in this construction, is placed above the arm 90 whichis fulcrumed as in the form shown in Fig. 4 and is provided with similar buttons, similarly enan insulated support. The ma net is electrically connected through the tro lay, with the overhead wire, by a conductor 91 and with the ground by a conductor 92. During energization of the, magnet the arm is drawn in the position shown in the drawings and when the trolley passing over the strip 87 breaks the electric circuit, the said arm falls upon a suitably arranged stop 93 to break the contact between its buttons with the superposed contacts and make that with lower ones.

For the purpose of breaking the motorcircuit before the curtain has moved beyond the predetermined distance. should the contact between the protuberance 81 and the button 77, in Fig. 7, be prolonged when the car on which the system is installed, is stopped, we have disposed a circuit-interrupting contrivance 94 in the main' operating circuit. This device,-as shown in Figs. 1 and 4 of the drawings, consists of a solenoid 35 whose core 96 is attached to a piston which is fitted in a dash-pot 97. The ends of the broken conductor, terminate in a contact 98 on the core 961ml a therewith continuously engaging brush 99 on the frame 100 which supports the solenoid and in case of a continued electric communication between the conductor and the wire leading through the trolley pole, the core, being drawn upwardly by the electrical influence of the solcnoidcofl, will carry the contact 98 out of engagement with the brush 99 and thus break the circuit.

Having thus described the mechanical construction of the various parts compri in the mechanism by which the movements of the curtain 7 are controlled, we will now proceed to explain the electrical connections reference being had tot-he diagrammatical manand the conductor of a car to reverse the main switth 57 when it is desired to distance from one advance the curtain a stationor street-name to another. Switch before mentioned 129 which like the switches, is normally open, connects the wire to save the motor 30 from circuit and are provided to enable the motormacadamia described, fuses, resistance coils and other.

112 with the wire 115 of the motor circuit and is designed to allow the train-men to operate the curtain for any desired period by operation of the motor, independent of the other parts of the mechanism. The switch 130 is adapted to break the conductor 112 of the clutch circuit when it is required to discontinue the operation of the entire system and the switch 131 performs the same function of the switch 130 by breaking the conductor of the main circuit leading to the interrupter 94.

In addition to the various devices above electrical contrivances are employed wherever required, but are for clearness of illus- (ration, omitted -from the drawings.

The operation oi the system follows When the contact devices 81-77 by which the system is included in the operating clrcuit of the car, are out of engagement, the contacts 69 and 70 of the main switch 57 engage the buttons 62 and 63 on the arm 60, the contact between the buttons 53 and 52 and the brushes 55 and of the governorcontrolled contact breaker, is broken and the plates 28 on the curtain engage the strips 23 so as to close the circuit in which the brushes 27 are included. Now, when the protuberance 81 comes in contact with one of the buttons 77, which are located along the railway line at regular intervals between each'two successive stations or intersecting streets, the magnet 58 of the main switch,. is energized and the position of the arm reversed. By the engagement of the button 62' on the latter with the contacts 65 and ('36, the motor circuit as well as the clutch circuit are closed and the consequent rotatory movement of the shaft 31 is transmitted by means of the chain 43, to the roller at of the element A with the result that the curtain 7 is moved vertically before the window 8 in the casing 2. At the beginning of this movement, before the motor-shaft has attained suiticient velocity to bring the contacts 52 and 53 in engagement with the brushes 55 and 54 through the instrumentality of the governor 48, the plates 28 move from contact with the strips 23 on the roller 5 and the curtain will, in consequence,rcontinue to move until the next set of plates, which are placed along the curtain at distances equal to those between the strect names, comes in contact with the strips 23,-when the releasing magnet 59 is energized. By action of this magnet the catch 71, which retained the arm 60 in its depressed position, is drawn rearwardly and releases the same with the result that the buttons (32and 63 are again brought in engagement with the contacts 69 and 70 and the motor and clutchcircuits are broken. The solenoid 45 of the brake Mis, at the same time. energized through the contact of the parts 62 and 69 and the motor is thereby brought to a sudden stop while the governor 48 whose balls move inwardly by reason of the reduced speed of the shaft 31, causes the contact between the buttons and 52 and the springs 55 and 54 to be subsequently broken. The parts are thus returned to their original position, ready to again move the curtain a distance equal to that between two con secutive street names on its outer surface or between two consecutive sets of contact plates on itsinner side.

In case a car on which our system is installed, is stopped with the contact devices on the trolley and overhead wire, or on the third rail, as the case may be, in engagement, the solenoid 95 of the interrupter 94, whose action is considerably slower than that of the magnet 58 of the main switch, will cause the contact 98 on the core on to disengage the brush 95), thus tweaking the operating circuit, and the parts included in the interrupter are proportiomul so that the time required in the above :ul ion is approximately equal to that in'which the curtain 7- moves the required distance. A fter the interrupter circuit is broken, the core controlled by the dash-pot 97, will return to its original position.

The operation of the system, when instead of closing the circuit to actuate the motor, the same is opened, has been described hereinbcfore and requires no further explanation at this point, and-it is obvious that on storage battery cars or wherever desired, a switch within reach of the motormanor conductor, may be substituted for. either .the trolley or 3rd rail contact devices, to

close the motor-circuit each time a; street intersecting the 4 line of railway 1s approached.

It should furthermore be understood that when our system is employed on large cars or on trains made .up of several vehicles, a number of the indicative elements A may be com'iected so as tooperate synchronously by connection with one contact device.

I laving; th'us described our invention, whatwe claim and desire to protect by Letters Patent is f 1. A station indicating system comprising a movable curtain, a motor-adapted to actuate the same, a switch in the motor circuit, electric means for actuating said switch in ashunt circuit of the operating. circuit of an electric-mi way, a conductor of electricity included in said operating circuit, a contact device adapted to close said shunt-circuit by engagement wuth said 0on doctor of electricity at determinate-points, thereof, and an interrupter in said shunt circuit, adapted to open the same after a de terminedperiod of contact of said device with said conductor.

2. A station indicating system comprising jiso a conductor of electricity of said operating circuit at determinate points thereof, and an interrupter comprising a solenoid whose core carries a terminal of said shunt circuit, and a stationary contact normally engaging said terminal and connected with the opposite terminal of said circuit.

3. A station indicating system comprising a movable curtain, an electric motor adapted to actuate the same, an electrically actuated clutch adapted to operatively connect the driving part of said motor with the driven part by which said curtainis actuated, an electric switch in circuits with said motor and with said clutch, electric means for op crating said switch whereby said motor and said clutch are simultaneously actuated, an electric device ada ited to automatically maintain said switch in its circuit closing position and to release the same when the circuit in which said device is located, is closed, and contacts associated with said curtain to close the last named circuit at determinate points of the-movement of the curtain. g

4. A station indicating system comprising a movable. curtaima motor for actuating the same, an electric switch in the motor circuit, electric means for operating the switch, an electric brake for retarding the movement of the motor shaft, electric means for actuating said brake, after the curtain has traveled a determined period, and a device connected with the motor to deenergize'said electric means when the velocity of the motor is reduced to a determined degree.

5. A stationindicating system comprising a movable curtain, a motor adapted to actuate the same, an electric switch in the motor-circuit, electric means for operating said switch, an electric device adapted to automatically maintain said switch in its circuit closing position and to release the same when'thc circuit in \vh'ich said device is located, is closed, contacts associated with said curtain to close the last named circuit at predeterminate points of the movement: of the curtain, and a contact breaking contrivance in said last named circuit, operatively connected with a driving parttof the motor and adapted'to break its circuit when the velocity of the motor is reduced to a predetermined degree.

6. A station indicating system comprising a movable curtain, a motor adapted to actuate the same. an electric switch in the motor circuit, electric means for operating said switch, an electric device adapted to antomatically maintain said switch in its circuit closing position and to release the same i when the circuit in which said device is located, is closed, contacts associated with said curtain to close the last named-circuit at determinate points of the movement of the curtain, and a contact breakn -contrivance in said last named circuit an comprising a governor operatively connected with the motor shaft, normally separated movable and stationary eontacts'in which said circuit terminates, and a means on said governor whereby said movable contact is brou ht in engagement with the stationary one uring movement of the shaft,beyond a determinate degree of speed.

7. A station indicating system'comprising amovahle curtain, a motor adapted to actuate the same, an electrieswitch in the motor-circuit, electric means for operating said switch an electric device adapted to automatically inaintain said switch in its circuit closing position'and to release the same ,when the circuit in which said device is located, is closed, contacts associated with shaft adapted to actuate said contact so as to close. said circuits when the velocity of said shaft exceeds a determinate degree.

8. A station indicating system comprising a movable curtain, a motor adapted to actuate the same, an electric brake adapted to retard movement of the movable arts of the latter, an electricall actuate clutch adapted to connect sai parts. with the driven part by which the curtain is actuated, an electric switch normally opening the motor circuit and the clutch-circuit and closin the brake circuit, electric means for reversm said switch', an electrically actuated device to automatically maintain said switch in its reversed ition and to release the same when the circuit in which said device is located, is closed, and contacts associated with said curtain to close the last named circuit at determinate. points of the movement of the curtain.

9. A st'ation indicating system comprising a movable curtain, a. motor adapted to actuate the same, an electric brake adapted to retard movement of the movable parts of the latter, an electrically actuated clutch adapted to connect said parts with the driven partby which the curtain is actuated, an electric device is associated with said curtain to close the last named circuit at determinate points of the'nioveinent of the curtain, a contact breaker controlling said last named circuit and the brake-circuit, and a goxez'imr connected with the motorshaft and adapted to engage said contacthreaker so as to close said circuits when the velocity of said shaft exceeds a determinate degree.

10. A station indicating system comprising a casing, parallel shafts rotatably mounted therein, rollers revolubly mounted on saidshafts, a curtain connected with said rollers tovmove from one onto the other, an electric motor adapted to actuate one of said shafts, a coiled spring connected at its 0pposite ends with the ether shaft and with the roller mounted thereon, a clutch normall y connecting the that named shaft with the roller carried thereby, and manual means for releasing said clutch from said roller.

ii. A station indicating system comprisinc a niovaiih curtain, a motor adapted to actuate the same, an electric brake adapted to retard the moving parts of the latter, an electrically a= nailed eiutch adapted to conmeet said parts with the driven parts by which the curtain is actuated, a switch normally opening the motor-circuit and the clutch clrcuit and closing the brake circuit, electric means for reversing said switch, in a shunt circuit of th an electric railway, a conductor of electricity included in said operating circuit, a contact device adapted to do e said shunt circuit by engagement with said conductor at determinate points thereof an interrupter in said shunt circuit adapted to open the same after a determined period of contactof said device with said conductor, an electrically actuated devlce to automatically maintain said switch in its reversed release the same when the circuit in which said device is located, is closed, and contacts associated with said curtain to close the last named circuit at determinate points of the movement of the latter.

Iii testimony whereof we have afiixed our signatures in presence of two witnesses.

ALEXANDER J. PANCRXIZ. FEAN K J. PANCRATZ. Witnesses G. J. ROLLANDET, M. L. GEARY,

operating circuit of position and to 1

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