US1044385A - Station-indicator. - Google Patents

Description

w. B. HILL. STATION INDICATOR.

1,044,385. I APPLICATION FILED JUNE 11, 1910. 12

3 SHEETS-BHEET 1.

ATTORNEYS W. B. HILL.

STATION INDICATOR. APPLIOATION FILED JUNE 11,`191o.

Patented Nov. 12, 1912.

3 SHEETS-SHEET 2.

:l Enum Wm WITNESSES: v

ATTHNEYS COLUMNA PLANMIIAPH 00., WASHINGTON, D. C.

W. B. HILL.

STATION INDICATOR.

AIPLIOATION 111.1111v JUNI: 11, 1910.

3 SHEETS-SHEET 3.

. c. ffm@ 6a y 1 BY ATTORNEYS coLUMBIA PLANOQRAPM co.,wAsHlNciTON. D. C.

Patented Nov. 12,1912.

VILLIAM BUFORD HILL, OF TCUMCARI,"NEW MEXICO.

sTATioN-INDIGATOE.

Specification of Letters Patent.

` Patented Nov. 12, 1912.

Application led .Tune 11, 1910. Serial No. 566,345.

To all whom t may concern Be it known that I, WILLIAM BUEoRD HILL, a citizen of the United States, and a resident of rlucumcari, in the county of Quay, State of New Mexico, have invented certain new and useful Improvement-s in Stationlndicators, of which the following is a specification. I

My invention is an improvement in station indicators, and consists in certain novel constructions and combinations of parts hereinafter described and claimed.

The object of the invention is to provide a device of the character specified, operated automatically by fluid under pressure or the like, and actuated either from the motor or the axle of the car, or from an independent wheel running on the rail.

Referring to the drawings forming a part hereof: Figure 1 is a vertical section of the improvement; Fig. 2 is a plan view of the mechanism; Fig. 3 is a section on the line 3-3 of Fig. 2; Fig. 4 is a side view of the trolley tripping mechanism; Fig. 5 is a front view of Fig. 4; Fig. 6 is a sectional view of the tripping mechanism; Fig. 7 is a sectional view of one end of the cylinder, and Fig. 8 is a detail sectional view of the reversing mechanism.

llfhe embodiment of the invention shown in the drawings is mounted in a casing 1, which is adapted to be supported in a suitable position in the car, and is provided in its side wall with an opening 2, through which the announcements appear, the opening being covered by a sheet 3, of transparent material, preferably lens shaped and convex as shown, so that the announcement will appear magnilied.

A roll 4 is journaled behind the opening, being secured on a transverse shaft 5, jour naled in the walls of the casing. Upper and lower rolls 6 and 7 are secured on shafts 8 and 9 journaled in the walls of the casing behind the shaft 5, and the strip 10 `on which the announcements or indications are printed has its ends secured to, and winding on, the rollers, the intermediate portion passing over the roller 4, which is arranged between the rollers 6 and 7; The strip passes from the roller G over the roller 4 to the roller 7, during the passage of the car in one direction and reversely for thereturn trip, and the stations are printed on the strip in regular order and are visible through the lens 3. lEach of the shafts 5, 8

` its ends.

and 9 has secured thereto a ratchet wheel 11, 12 andL 13,.,respectively, and the wheels are operated by means of' a piston 14, movingV in a cylinder 15 and moved by the motor fluid. The, piston ,rodl 16 of the piston extends through a stuffing box 17, in the head 18 of the cylinder, and the upper end of the rod extends through a guide block 19, secured to the casing near its upper end.y Across arm 26 is secured transversely of the rod below the guide block, the Vrod passing through an opening in the arm and being nearer one end of the arm than the other, and a spring 20 encircles the rod between the guide block and the cross arm and acts normally to press the arm downwardly.

Alink 21 is pivoted to the arm on each side of the piston rod, as aty 22, and a pair of levers 23 is journaled at one end on the shaft 5, andv provided at the other with a pivotally connected pawl 24 and 25, respectively, the lower end of each link being pivoted to the adjacent lever intermediate Both pawls engage the ratchet wheel 1:1, the pawl 24 driving it in one direction and the pawl 25 in the other. The long end of the cross arm 26 is provided with an opening through which extends the reduced portion 27 of a rod 28, a shoulder 29 being formed between the reduced por tion and the main portion, upon which the cross arm rests, and a spring 3() encircles the reduced portion between the end ofthe cross arm, and a washer 31, through which the end ofthe rod passes. A lever 32 is ournaled by one end on the shaft 8, and is provided at its opposite end with a pivoted pawl 33, which engages the ratchet wheel 12.

A lever 34 is journaled intermediate its ends on the shaft 9, and a link 35 connects one end ofthe lever with the lever 32, being `pivoted to the said lever between the pawl and the shaft, and the rod 28 is pivoted to the oppositeend of the lever 34. Outside of the rod a pawl 36 is pivoted to the lever 34 and engages the ratchet wheel 13. Each of the pawls 24 and v25 is pivoted by one end to the lever and is held in engagement with the ratchet wheel by a spring 37, one end Aof which engages the pawl and the other is formed into a collar 38 encircling the head 39 of a link 39a to be presently described.

A collar 4()` is journaled on each of the shafts 8 and. 9 and each collar is provided with two radial lugs 41 and 42. A spring 43 is pivoted yto each of the lugs 41 by one Y 53, through which the shaft 5 passes.

end and the other is pivoted to the adjacent pawl 33 or 36, and the arms 42 of the collars are connected by a link 44. The pawl 33 is pivoted to the lever 32 by its center, one end of the pawl engaging the ratchet wheel and theother being engaged by the spring at 45,

while the pawl 36 is pivoted to the lever 34, by one end, the other engaging the ratchet wheel, and the spring being connected to the center of the pawl, as at 46. The link 44 is provided with spaced collars 47, each engaging one end of a spring 48, the springs encircling the link between the collars, and the collars are held against the springs by bolts 49. A three armed rock shaft is j ournaled in the casing between and behind the rollers 6 and 7, one of the arms 51 extending forwardly and beingprovided with an openingthrough which extends the link 44,

and` a spring 48 is arranged on each side ofv the arm. Another arm 52 of the rock shaft is pivoted to one end of the link 39a before mentioned, the other end of which is provided with the head 39, encircled by the collars 38 of the springs 37, and the head is provided with a slot or elongated bearirlig Tie third arm 54 of the rock shaft extends downwardly and is provided with a knob 55 journaled thereon by a pin 57, and extending through a slot 56, in the case. The slot is provided with three notches 56a for engagement by the knob, and the knob is engaged by a spring 58 to hold it in place in the notches. v

The springs 37 and 43 are heavy wire, as shown, and are more properly operating means for the pawls than springs, since their movement swings the pawl into and out of engagement with the respective ratchet wheels. They. are, however, suiliciently resilient to hold the pawls to their work, while permitting the pawl to slip idly over the teeth of the ratchet wheels on the return stroke.

As before stated, the pawls 24 and 25 drive the roller 4 in opposite directions, and

when one is in engagement with the wheel they other is necessarily outv of engagement. The rock shaft 50 is the reversing mechanism for the pawls, and operates as follows z-"When the rock shaft is in the position shown in Fig. 1, the pawl 25 is in engagement with the ratchet wheel 11, and the roller would be turned anti-clockwise. The lowerroller is now the Awinding up roller and the upper roller the unwinding roller. When the piston moves upward, the springs 20 and 30 are compressed and the pawl 25 moves the ratchet wheel 11 and roll 4. The rod 28 is also moved upward, and the roller 7 is rotated clockwise and the roller 6 is out of engagement. Every complete stroke of the piston will move the rollers 4 and 7 positively. Vhen it is desired to reverse the direction of travel of the strip l0, the rock shaft 50 is swung to move the link 44 upwardly and the link 39L to the right of Fig. l. The pawl 25 is now swung out of engagement with the ratchet wheel 11, and the pawl 24 into engagement therewith, and the position of the pawls 33 and 36 is reversed, the pawl 33 being engaged with the ratchet wheel and the pawl 36 disengaged. It will be clearly evident that under these circumstances the strip will travel in the opposite direction, for the roller 4 will now travel clockwise, and the roller 6 will be the winding up roller. The strip is engaged above and below the opening 2 of the casing by rollers 59 which hold it against the face of the roller 4.

The device is, as before stated, operated by compressed air, and the displaying mechanism just described may be operated by trips arranged preferably on the trolley wire at points where announcements are to be made, or it may be operated by mechanism driven by the movement of the ear, which mechanism will actuate the displaying mechanism at the proper intervals. The latter operating means is shown in 2 and 3 and comprises a casing 60, on the side of which is journaled a sprocket wheel 60 which is adapted to be connected by a suitable chain with a rotating part of the car. A worm 62 is secured on the shaft of the sprocket wheel inside the casing, and meshes witha worm wheel 63, on a vertical. shaft 64, journaled in bearings 65, on the casing. The lower end of the shaft is provided with a pinion 66, which meshes with a. gear wheel 67 on a counter shaft 63 journaled in bearings 69. The upper end` of the countershaft is provided with a bevel pinion 70, which is adapted to mesh with one of two bevel gear wheels 71, and 72, secured to a shaft 73, journaled transversely of the casing in the walls thereof.

The shaft 73 has secured thereto a drum 74, and on the other side of the drum from the bevel gear wheels the shaft is provided with a sprocket wheel 75, connected by a sprocket chain 76, with a sprocket wheel 77 on a parallel screw shaft 78, also journaled in the easing, and provided intermediate its ends with a thread 79. The peripheral surface of the drum is provided with a spirally arranged radial flange or rib forming a continuous cam wheel 80, the flange being provided at irregular intervals with recesses or notches 81. The arrangement of the notches corresponds to that of the announce. ments or stations, and the distance between the notches is proportional to the distance between the stations. The length of the cam is in proportion to the length of the.

strip and the length of the route, so that the roller to be described will 'travel from one end of the flange to the other, while the car is traveling from one end of the route to the other.

A sleeve nut 32 is mounted onthe screw rod 79, and the nut is provided with an upwardly extending arm 83 having at' its end an angular portion 84, on which is ournaled a flanged roller 85 which engages 'the cam. V The relation between the sprocket wheels 7 5 and 77 is such that the nut moves with the arm. S3 always opposite the flange and with the roller in engagement therewith, and the arm is pressed toward the cam by a plate spring 86 secured at one end to the casing, as at 87, and engaging the arm with its other end. The sleeve nut 82 is provided with two depending side arms 38 which are connected by a cross plate 89, whose lower edge is curved outwardly, as at 90, and 'the said edge is engaged by a catch 91, on one arm of an elbow lever 92 pivcted between a pair of ears 93, on a link 94, to be described, and the other arm 95 of the elbow lever extends into position for engagei'nent by the nose 113 of a curved lever 97 `pivoted on a bracket 98 extending from a cylinder 99 in the casing. The cylinder is provided with a piston 100 and the rod 101 of the piston moves in a tube 10Q extending into the cylinder from one end. A coil spring 103 encircles the tube and rod, normally pressing the piston toward the end of the cylinder remote from the curved lever. The lower end of the curved lever 97 is in position for engagement by the rod when the piston is moved against thev resistance 'of the spring, and when so engaged, the nose of the lever is moved into engagement with the arm 95 of the elbow lever, which in turn is moved to release the cross plate S9. The inlet 104 of the cylinder is at the end remote from the curved lever 97 and is controlled by a valve 105, whose stem 106 is pivoted to one end of a lever 108 pivoted to a bracket 109 on the cylinder. The opposite end of the lever is pressed upwardly by a spring 110 secured to the cylinder and is provided at its extremity kwith a notch 111. The link 94 before mentioned, is also provided at its lower end with a roller 94a normally resting in a notch 111l above the notch 111. The valve 105 closes the inlet by its upward movement and opens it by its downward movement, and when the rod 101 of the piston engages and swings the curved lever 97 the valve is closed by the engagen'ient of the lug 112 with the adjacent end of the lever.

rilhe admission of Huid under pressure to4 inder by a pipe 152. The valve is connected to a source of air supply by apipe 150b, and

`lars are so arranged that the sleeve 155 will engage one of the collars near each end of l The said arm 1s provided the travel of the piston, so that the valve150' will not be shifted untiljust before the piston has finished its travel. rThe upper end of the cylinder l15 is connected by a pipe 158, with the inlet pipe 104 of the'cylin--- der 99.

The operation ofthe mechanism above described is, as follows z-Vhen the roller engages a depression 81 in the cam 80, the lever83 swings on the screw shaft, the upper end thereof beingforccd inwardly by the spring 86 and the said spring is of su'liicient width to engage the lever whatever its position. .,When the upper end of thelever.

swings as above described, the link 94 is carried with the lower end of the lever, andthe roller 94a is dislodged from the notch 111,

dropping into the notch 111. This movement of the roller 94a permits the adjacent end of the lever 108 to be pressed upward by the spring 110, thus depressingthe oppositeend ofthe lever and opening the .valve 105. kThe opening of the valve 105 permits the air above the piston 14 to exhaust through the pipe 158 into the cylinderl 99 and the'piston 100 in the said cylinder 99 is movedA to the left of Fig. 3 by the in-coining air. The valve 150 is normally in the position shown in Fig. 1, that is, in the position to connect the lower end of the cylinder 15 with the source of fluid under pressure. The piston however hasfnot moved because the pressure below thepiston is counter-balanced by the air above the piston and the spring 20. When however, the valve 105 has been opened` as above mentioned, the airl pressure below theipiston 14 forces the said piston upward, and drives the air from f above the piston 14 into the cylinder 99. The piston 14 moves upward, operating the display mechanism, and when near the end on its upward stroke, Vthe valve is reversed, to connect the upper end of the cylinder 15 with thesource-of fluid under pressure and to connect the lower end with the atmosphere. rIhe piston 14 is then forced downward, returning all the parts to their original. position. The movement of the piston 100 to the left end of the cylinder m99 causes the rod 101 to engage the tail of the lever 97 and swings thek said lever on its pivot. When thelever 97 is swung as above mentioned the lug 113k engages the arm 95 l of the elbow lever 92, and swings the elbow Vthe link 94 to the right, and to move the roller 94a from the notch 111 to the notch 111% rlhis movement of the link closes the valve 105, and the spring 103 returns the piston 100 to its original position, the air on the opposite side of the piston from the spring being forced out through the bleed' vent 106a in the valve stem 106, Fig. 7. The lug 112 of the lever 97 assists the replacement of the roller 94ZL in the notch 111a by engaging and depressing` the adjacent end of the lever 108. As the roller 85 passes out of the depression in the cam the lower end of the lever 83 is swung to the right of Fig. 3 and into engagement with the catch on the arm 91 of the elbow lever 92, and the spring 91a holds the latch in engagement with the lever.

Where the car is run around a loop or turned at the end of the run it is necessary to reverse the motion of the drum at each end of the run, and in Figs. 2 and 3 this reversing mechanism is shown. A shaft 114 is journaled adjacent to the screw shaft, and the upper end of the link 94 is ournaled on this shaft, as are also a pair of spaced arms 115. The arms extend toward the shaft 68 and are connected near the shaft by a cross bar 116. One of the bearings 69 of the said shaft is on this bar, and the bearing is somewhat enlarged to permit some lateral movement of the shaft without bending. Each larm is provided with a lug'117 extending above the shaft 114 in position for engagement by the nut 82 at each end of its travel.

A spring arm 160 extends inwardly from the wall of the casing, and the shaft 68 is provided with a rigid collar 161, and a loose collar 162 above the rigid collar and next to the spring arm. The collar 162 is provided with a beveled projection 163 on its upper face on each side of the shaft, and the arm is provided with a similar projection 164 on its under face. A pin 165 is secured to the collar 162 and extends through a slot in the arm 160, and the said arm is also traversed by the shaft 64.

The bearing 69 is slidable in a vertical opening in the cross bar 116 and is engaged on each side by a spring 166. A collar 162 is secured to the shaft 68, and a second collar 164 is journaled on the shaft above the collar 162. The collar 164 is provided with oppositely arranged upwardly extending beveled projections 165, one on each side of the shaft 68. rlhe said projections are adapted for engagement with the projections 163 of similar shape, on a resilient arm 160 secured to the wall of the casing, and having openings for receiving the shafts 64 and 68. Apin 167 extends upwardly from the collar 164, and passes through a slot in the arm 160.

As the roller travels on the rib, the sleeve nut 82 is shifted in one direction until it engages one of the lugs 117. For instance, in Fig. 2, if the sleeve nut is moving toward the left of the said figure, it will finally engage the lug 117 at the left of the said ligure, and will shift the arms 115 of which the lugs are a part. The spring arm 166a holds the shaft 68 in the position shown, by the inter-engagement of the lugs 163-165. As soon however, as the lug 117 is engaged as above specified, sufficient pressure is brought to bear on the frame to swing the shaft 68, and the spring arm is lifted, the lugs 165 engaging the opposite sides of the lugs 163 and the pinion 70 engaging the gear ring 72. By this arrangement any possible stripping of the teeth is prevented when engaging or disengaging. The engagement of the nut with the lug moves the frame composed of the arms and cross bar and swings the shaft 68 slightly, but enough to disengage it from one of the bevel gears 7l, 72 and engage it with the other, thus reversing the direction of rotation of the drum.

When it is desired to operate the displaying` mechanism by a trip, arranged on the trolley wire, cam rods 118 are arranged in pairs at the points where announcements are to be made, one rod on each side of the trolley wire 119. The rods are connected by U-shaped hangers 120 at each end and at the center of the rods, which extend above and over the wire, and are supported above the wire by braces 121. The cam rods are spaced apart suiieiently to permit the passage of the trolleywheel 112, and a long roller 123 is journaled in the arms of a fork 124 pivoted between a pair of arms 125 on a split collar 126 on the trolley pole 127. The arms 125 are provided at their upper ends with angular portions 128, between which the fork moves, and thc angular portions are connected by rivets 129, which act as stops to limit the movement of the fork, and the lower end of the fork is provided with a lateral lug 130, which is connected to a tripping device, to be described, by a link 131. A cylinder 132 is secured on the pole 127 by brackets 133, and a piston 134 is movable in the cylinder. The piston is provided with a rod 135 which moves in a tube 136 extending inwardly from the upper end of the cylinder, and the tube and rod are encircled by a coil spring 137, which normally retains the piston in the position shown in Fig. 6. A rod 138 is slidable in bearings 139 in the brackets, and the angular end 140 is in position for engagement by the piston rod as the piston moves upward. The lower end of the rod 139 is pivoted to a catch 142 pivoted on the cylinder at 143. A lever 144 is pivoted to a lug 145 on the cylinder, and the free end of the lever is adapted for engagement by the catch to hold the lever in a specified position. An inlet pipe 146 is provided for the cylinder, and a valve 147 cooperates with a valve seat in the pipe, the valve being connected by a link 148 with the lever before mentioned. Then the roller 123 engages the cam rods 118, the fork is swung on its pivot, and the free end of the lever 144 is swung toward the cylinder, opening the valve, the end of the lever engaging beneath the catch, which engages the lever and holds the valve open. The fluid under pressure now passes into the cylinder, moving the piston against the resistance of the spring until the piston rod engages the angular portion of the rod 139 and moves the same. The movement of the rod swings the catch and releases the lever, andthe fluid operating against the valve closes it.

lt will be observed that the tripping cylinder just described is substantially the same as that shown in Figs. 2 and 3, the former being operated from the trolley wire and the latter from a rotating part of the car, or by an independent Wheel, and when one is used the other will be dispensed with.

The operation of the trippingmechanismshown in Figs. 4, 5 and 6 is substantially the same as that shown in Figs. 2 and 3, it being understood that the pipe 146 in this instance is connected with the pipe 158 of the cylinder l5 and that when the valve 147 is opened, the air exhausts from the upper end of the cylinder 15, to operate the shifting mechanism. As soon as the rod 135 engages the end 140 of the rod 439 the valve is released, and the spring 137 releases the piston 134, the stem of the valve having a bleeding vent.

The shaft 5 is provided with a wheel 171 of polygonal periphery on the opposite side from the ratchet wheel, and a roller 172 engages the said periphery. The roller is journaled in one end of a loop 173, of resilient material, whose other end is journaled on a pin 174, and one of the sides of the loop is engaged by a second pin 175, so that considerable yielding pressure is brought to bear on the roller.

The object ofthe roller is to steady the motion of the shaft 5, and to take upv the jar. The rollers carrying the strip are preferably rubber covered, and the rod 27-28, and the spring 30 is intended to compensate for the diiferent sizes of the holding rollers during the winding of the strip. The tension of the spring may be adjusted by the washer 31. The tension of the springs 48 may also be varied by moving the bolts in the slots shown.

The spring 20 assists in gradually depressing the piston, and also eliminates any jar in its upward movement. The. tripping mechanism shown in Figs. 2 and 3 operates in accordance with the mileage actually covered by the displaying apparatus, while that shown in Figs. 4, 5 and 6 is independent of the actual travel of the car.

Means is provided for varying the m0- ment at which the reversing of the movement ofthedrumwill take place, that is, to correspond with the length of the rib on the drum. The frame consisting of the arm 115, the connecting bar 116, and a sectional plate 180 connecting the arms 115 adjacent to the shaft or rod 114, may be increased or decreased in size. The bar 116 is sectional as is also the plate 180 and the sections of both the bar and the plate are provided with slots 181 at their lapping ends. Set screws 182 extend through the slots for clamping the sections together. It will be obvious that by loosening the set screws the arms 115 may l be moved on the rod or shaft 114. When the lugs 117 are moved nearer together, the sleeve nut 82 will engage the said lugs at an earlier point in its travel.

What I claim is:

1. The combination with the car, of a. sta tion indicator comprising a casing supported in the car and having a display opening, winding rollers above and below the opening, a roller behind the display opening between the said rollers, a strip of fabric material having printed thereon the names of the stations in regular order winding on the winding rollers, and passing over the display roller, a ratchet wheel secured to each roller, a pawl engaging the ratchet wheel of each winding roller, means including a link connecting the said pawls, a pair of oppositely arranged pawls engaging the ratchet wheels of the display roller for driving it in opposite directions, a three armed rock shaft journaled in the casing, means 4connected with one arm for oscillating said shaft and extending outside of the casing, means for simultaneously moving the last named pawls in opposite directions to engage one and disengage the other from the ratchet wheel of the display roller, a connection between said means and another arm of the rock shaft, a spring connected with each pawl of the winding rollers, means including a link connecting said springs for simultaneously moving the pawls in opposite directions, the third arm of the rock shaft having an open. 120 ing thro-ugh which the link extends, a spring on each side of the arm, and a bolt ladjustable on the link at the outer end of each spring, fluid operated means connected with the pawls for operating the rollers, and means'controlled by the movement of the carV for operating said means at predetermined intervals.

2. In a device of the character specied,

a display roller, a pair of winding rollers, a

Copies o1 this patent may be obtained for strip of material having the station designations in regular order winding on the wind.- ing'` rollers and passing Vover the display roller, a ratchet wheel connected with each roller, a pawl for the ratchet. wheel of each winding roller, a pair of oppositely arranged pawls for the ratchet wheel of the display roller, means for simultaneously ,moving said pawls in opposite directions,

means for simultaneously moving the irstnamed pawls in opposite direct-ions, a single means for operating both of the said moving means, and a yielding connection between operating means and the moving means of the pawls for the winding rollers.

3. In a device of the character specied, a pair of winding rollers, a display roller between the winding rollers, a strip of lieXible material having station designations, winding on the winding rollers at its ends and passing over the display roller, a shaft for each roller, a ratchet wheel connected with each shaft, a pawl for operating the ratchet wheel on each winding roller, a link arranged transversely of the shaft of the display roller and having a circular head provided with a slot through which the shaft extends, a collar encircling the head, a pair of oppositely arranged pawls for engaging the ratchet wheel of the display roller, a connection between each pawl and the collar for simultaneously engaging one pawl and disengaging the other when the link is moved longitudinally, means for simultaneously moving the pawls of the winding rollers to engage one of the said pawls and to disengage the other, and a common means engaging the link and the said pawl moving means for simultaneously operating the same. Y

4:. In a device of the character specified, a pair of winding rollers, a display roller between the winding rollers, a strip of liexible material having station designations 'winding on the winding rollers at its ends and passing over the display roller, a shaft for each roller, a ratchet wheel connected with each shaft, a pawl for operating the ratchet wheel on each winding roller, a link having a longitudinal slot for receiving the shaft of the display roller, pawl arms journaled on the display roller shaft and extending at an angle to each other, a pawl on each arm, said pawls being oppositely arranged for moving' the ratchet wheel in opposite directions, a connection between each pawl and the link for alternatively moving the pawls into and out of operative position when the link is moved transversely of the shaft, means connected with the pawls of the winding rollers for moving them in opposite directions to alternatively engage and disengage them from the respective ratchet wheels, a common means engaging the link and the said pawl moving means for operating them simultaneously, and a yielding connection between the said common means and the pawl moving means.

5. In a device of the character specified, a pair of winding rollers, a display roller between the winding rollers, a strip of flexible material having station designations, winding on the winding rollers at its ends and passing over the display roller, a shaft for each roller, a ratchet wheel connected with each shaft, a pawl for operating the ratchet wheel on each winding roller, a link having a longitudinal slot for receiving the sha'ft of the display roller, pawl arms journaled on the display roller shaft and extend ing at an angle to each other, a pawl on each arm, said pawls being oppositely arranged for moving the ratchet wheel in opposite directions, a connection between each pawl and the link for alternatively moving the pawls into and out of operative position when the link is moved transversely of the shaft, means connected with the pawls of the winding rollers for moving them in oposite directions to alternatively engage and isengage them from the respective ratchet wheels, and a common means engaging the links and the said pawl moving means for operating them simultaneously.

G. In a device of the character specified, a pair of winding rollers and a display roller, a strip having station designations winding on the winding rollers and passing over the display roller, a ratchet wheel connected with each roller, a pawl for operating the ratchet wheel of each winding roller, a pair of oppositely arranged pawls for moving the ratchet wheel of the display roller in opposite directions, a link arranged transversely of the display roller, and mounted for longitudinal sliding movement, a connection between each of the pawls of the display roller and the link for simultaneously engaging one pawl with the ratchet wheel and disengaging the other, means for moving the pawls of the winding rollers in opposite d1- reetions, and a common operating means for the link and the said means.

ILLIAM BUFORD HILL. llVitnesses:

P. W. 'HILL, H. F. REYNAUD.

five cents each, by addressing the "Commissioner of Patents, Washington, D. C.

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