US801190A - Electric semaphore. - Google Patents

Description

PATENTED OCT. 3', 1905.

C. E. FRBDERICKSON. ELECTRIC SEMAPHORE.

APPLICATION FILED JAN.23,1905.

4 SHEETS-SHEET 1.

WITNESSES:

No. 801,190. PATENTBD OCT. 3,1905. 0. B. FREDERIGKSON.

ELECTRIC SEMAPHORE.

APPLICATION FILED 51111.23, 1905.

4 SHEETS-SHEETS.

INI/EIVTOR No. 801,190.- PATENTED 001. 3,1905.

0. E. FREDERIGKSON. ELECTRIC SBMAPHORB.

APPLICATION EILED JAN.231905.

4 SHEETS-SHEET 4.

By -07? I76;

ATTORNEYS.

WITNESSES.

rrnn STATES PATENT OFFICE.

CLAYTON E. FREDERIOKSON, OF DENVER, COLORADO, ASSIGNOR OF ONE-HALF TO JEAN F. WVEBB, OF DENVER, COLORADO.

ELECTRIC SEIVIAPHORE.

Specification of Letters Patent.

Patented Oct. 3, 1905.

Application filed January 23, 1905. Serial No. 242,361.

To (oi/Z whom it may concern,-

Be it known that I, CLAYTON E. FREDERICK- SON, residing at Denver, in the county of Denver and State of Colorado, have invented certain new and useful Improvements in Electric Semaphores, of which the following is a specification.

My invention relates to certain new and useful improvements in semaphores for use in connection with railway systems; and it more particularly relates to that class of semaphore mechanisms in which locking devices are provided for holding the semaphore-arm in its normal or safety position and in which electromagnetically-operated means are provided for releasing such lock devices to permit the semaphore being moved to its danger position and at the same time operate a signal in the tower-house to inform the operator that the semaphore has been properly set or moved to its danger position.

Primarily my invention has for its object to provide a semaphore of this class of a very simple nature, which can be readily manufactured at a minimum cost, and which will be positive in its operation and effectively serve its intended purposes.

Again, the invention seeks to provide a device of this character in which all the operating parts are so arranged that ready access may be had thereto whenever it may be found desirable to inspect such parts or to insert or remove a signal-lamp.

In its generic nature my invention comprises suitable supporting-standards, upon which a semaphore-arm is pivotally mounted and upon which locking devices are mounted for cooperating with the semaphore-arm to hold it in its normal or safety position. Upon the standards I also mount electromagnetic lock devices and circuit-closing devices for operating the lock devices to release them from their operative connection with the semaphore-arm. Means are also provided whereby a supplemental circuit is closed when the semaphore-arm moves to its danger positionto indicate to the operator in the signaltower that the arm has been set to the proper position.

My invention also includes a rotatablymounted casing having signal-light apertures, which is so mounted as to rotate with the semaphore-arm to bring its signal-light apertures in register with a suitable lamp held within the casing on a suitable bracket carried by the supporting-standards.

With other objects in view than have been heretofore enumerated the invention also includes certain novel construction, combination, and arrangement of parts which will be first described in detail and then specifically pointed out in the appended claims, reference being had to the accompanying drawings, in whicl1- Figure l is a perspective viewof my improved semaphore. Fig. 2 is a vertical longitudinal section thereof, showing the parts with the semaphore arm and blade in their normal or safety position. Fig. 3 is a similar view, the parts being shown in their danger-indicating position. Fig. 4 is a vertical cross-section on the line 4 4 of Fig. 2. Fig. 5 is a perspective view of the semaphore mechanism with the housing removed. Fig. 6 is a diagrammatic view showing the arrangement of the electric circuits when parts are in the safety position. Fig. 7 is a similar view showing the arrangement of the electric circuit when the parts are in the danger position.

Referring now to the accompanying drawings, in which like numerals and letters of reference indicate like parts in all of the figures, l 1 designate the upright supporting bars or standards, preferably constructed of iron and which are arranged parallel to one another and terminate at the bottom in the downwardly-extending angled portions 1 1 and the downwardly-extending ends 1 1 which straddle over the supporting-posts 33, to which they are firmly secured by the screws 34 34 and the bolts 35 35, as clearly shown in Fig. 4. Fulcrumed on a pivot 3, held between the supporting-standards 1 l, is a semaphore-arm 2, which carries the semaphore' blade 2 at its outer end and to which the arc bar 21 is secured by the irons 21 21 and the rivets or bolts 21 21 as clearly shown in the drawings. The bar 21 is bent in the arc of a circle, having as its center the pivot-point 3 of the arm 2, and the said bar 21 passes between the upper ends of the standards 1 1. Near the top ends of the standards 1 1 and between the same I mount a friction-roller 19 on a spindle 20, and the roller 19 engages with the arc bar 21 to steady the same and hold it in engagement with the tumbler-lock 16, here- 7 inafter again referred to. On the under side the bar 21 is provided with an elongated notch 22 to receive the rocking tumbler 16, which is pivotally mounted in bearings in the standards 1 1 below the arc bar 21, and the tumbler 16 has a flat portion 16 to permit it to become released from the bar 21 when it is turned on its axis, as will be hereinafter more fully understood. The shaft 16 of the tumbler 16 has a squared end 16 to receive the lever 17. To the other end of the said lever 17 the pitman 18 is pivotally attached. Fulcrumed at 15 to the standards 1 1 is a second lever 14, which passes between such standards 1 1 and is pivotally connected at one end with the rod 18, while at its other or free end the lever 14: carries an armature 13 for cooperating with the electromagnet 12. The electromagnet 12, hereinafter termed the releasing-magnet, is mounted on a bracket 12, which is in turn vertically adjustably mount-- ed on the standardsl 1 by the bolts 12 12", which pass between such standards 1 1 and are secured by the nuts 12 12, as clearly shown in Fig. 2.

Below the magnet 12 and near the pivot 3 I screw a pair of U-shaped bracket members 5 5 to the standards 1 1, and these members 5 5 form the support for the supplemental signal-operating mechanism hereinafter again referred to. Mounted between the upper portion of the members 5 5 is an electromagnet6 6, which cooperates with the armature portion 8 of the angled armature member 8 The member 8 is fulcrumed at 8 between the brackets 5 5 below the magnet 6 and is held from dropping downwardly beyond a certain limit by the stop 19, which is also secured between the bracket members 5 5.

1O designates a block of insulating material to which a contact-spring 9 is secured, and the spring 9 is also in contact with the bindingpost 9 on the insulating-block 10, to which one wire 47 of the supplemental return signal-circuit is attached, the other wire 18 of said bracket being attached at one end to the armature member 8 and grounded at its other end, as at g.

The terminal ends 6 6 of the electromagnet 6 are connected with binding-posts 7 7, mounted on an insulating-block 11, secured between the bracket members 5 5. One of the terminal ends of the releasing-magnet 12 is connected to the binding-post 7 through the wire 45, while the other end is connected, through wire &6, to line-wire 16, which is in turn connected to the contact-point 36 of a switch S in the signal-tower T. (See Fig. 6.) The other post 7 is connected by wire 15 with the line-wire 45, which in turn is connected to the switch-point 36 of the switch S. The switch S has its two blades 38 38 pivotally mounted, as at 38 38, and connected to move in unison by the insulating-strip 38*, to which the finger-knob 36 is attached. The battery 37 is connected by wire 39 39 to the two blades 38 38 of the switch S, as clearly shown in Fig. 6.

The releasing-magnet 12 and the magnet 6 are connected in series with each other in the main circuit, which contains the switch S and the battery 37.

The supplemental circuit, which contains the circuit-closing members 8 and 9, also contains a signal device 40, which may be in the nature of a bell or other suitable signal mechanism, and also includes a cut-out switch 41 and a supplemental battery 42, as clearly shown diagrammatically in Fig. 6.

23 designates a dash-pot secured to a bracket 23, which bracket 23 is vertically adjustably mounted on the standards 1 1 by the bolts 23, which pass between the standards 1 1 and are secured by the nuts 23 and washers 23 that cooperate therewith. The piston 24? of the dash-pot 23 is pivotally connected at 2 1 to a pitman 24, which is in turn pivotall y connected at 2 1 to the arm 2. The dash-pot 23 and its connection with the arm serves to prevent said arm 2 from moving too suddenly to either its safety or danger position, and it also serves to hold the arm down in its danger position after it is once moved to said position and prevent its being accidentally elevated to the safety position.

At its inner end the arm 2 carries a pawl &, which is pivoted thereto, as at 1, and which includes a heel portion 4;, that engages with the armature portion 8 of the armature member 8 as the arm 2 drops, and thereby raises the armature 8 to rock the armature member and bring it into engagement with the contact-spring 9 to close the supplemental circuit, the armature 8 being then held in such position by the holding-magnet 6. It should be understood that the magnet 6 does not of itself draw up the armature 8, but merely serves to hold it in its circuit-holding position after the armature 8 has been raised by the arm 2 and as long as current is flowing into the main circuit.

26 designates a casing or housing of metal which comprises the side wall 26 26" and the peripheral rim 27 which rim 27 is preferably formed in sections hinged together, as at 27, to form doors 27 27", whereby ready access can be had to the interior of the casing. The doors 27 27 x are secured together by the hasp 29, staple 28, and lock 50, as shown. The side walls 26 26 of the casing are secured together at their centers by the bolts or shafts 26 26, which are screwed into the ends of the pivot member 3 and which have their outer ends threaded, as at 26 26 to receive the securing-nuts 27 i 27 The arm 2 passes through a peripheral aperture 27 of the rim 27, so that the casing 26 and the arm 2 will move together in unison on their pivot-axis. The rim of the casing is slotted, as at 27, to permit passage of the standards 1 1.

31 31 designate openings in the wall 26" 26 of the casing 26, and the said openings are closed by the glass windows 32 32, which may be and preferably are of colored glass to indicate a danger-signal. Within the casing and at the bottom thereof is a bracket 25, secured to the standards 1 1, and the bracket 25 has a lamp-receiving member 25* at its free end, upon which the signal-lamp L is set. The lamp L is so arranged that it is below the horizontal plane containing the axis of the pivot 3, so that when the parts are in their normal or safety position (shown in Fig. 2) the lamp will be invisible, and when the parts are in their danger-indicating position (shown in Fig. 3) the windows 32 32 will be in alinement with the lamp L to show a danger-signal position.

Operation: The manner in which my invention operates can be best explained by reference to Figs. 2, 3, and 6 of the drawings, and assuming the parts to be in the position shown in Fig. 2, which is the safety position, the arm 2 being locked in its safety position by having the tumbler 16 engaging with the notch 22 and the main circuit being broken at the switch S, while the supplemental circuit is open at contacts 9 and 8 and also at the switch 41, when it is desired to set the semaphore to indicate a danger-signal, as shown in Fig. 3, the tower operator closes the switch S, thereby causing a current to flow in the main circuit from battery 37 to energize the releasing-magnet 12 and the holding-magnet 6. As the magnet 12 becomes energized it attracts its armature 13, and thereby rocks lever 14, which rocking motion is communicated to lever 13 by the pitman 18 to turn the tumbler l6 and bring its flat faces 16 to register with the rod 21. This releases the rod 21 and permits the semaphore-arm to fall, carrying the casing with it and turning the casing on its pivot-axis until the windows 32 32 are in alinement with the signal-lamp L. As the arm 2 falls the dog 4 engages the armature 8 of the armature member 8 and raises it until the member 8 engages the contact-spring 9, thereby closing the supplemental circuit at such point. As the armature engages the magnet 6 the dog 4c passes over the end of the armature 8, and the parts will then be in the position shown in Fig. 3. The operator next closes the supplemental circuit at the switch 41, and thus causes the current from battery 42 to flow and operate signal 40 in the tower-house so long as the supplemental circuit is closed at contacts 8 and 9. This indicates to the tower operator that the arm 2 has fallen to its danger-indicating position. The tower operator next breaks the main circuit at switch S, which allows the magnets 12 and 6 to become deenergized, thus releasing their armatures 13 and 8*, respectively. The armature 8 will immediately fall down and be arrested in its motion by the stop 49. As the arm 2 is again returned to its normal or safety position, either by hand or otherwise, and the notch 22 again brought opposite the tumbler 16 the weight of the armature 13 will cause the lever 14 to rock, thereby imparting its motion through pitman 18 to lever 17 to cause the tumbler 16 to again rock back to its locking position, as shown in Fig. 2. The arm and casing may be rotated back to their normal or safety position either by hand or in any suitable manner. As soon as the arm 2 is again raised the casing 26 is again returned to its normal position, and the parts will then be in their safety position, as shown in Fig. 2.

From the foregoing description, taken in connection with the accompanying drawings, it is thought the complete construction, operation, and many advantages of my invention will be readily apparent to those skilled in the art to which it appertains, and I desire it understood that slight changes in the detailed arrangement and construction of parts may be made without departing from the scope of the invention or the appended claims.

Having. thus described my invention, what I claim, and desire to secure by Letters Patout, is

1. A semaphore comprising a pivotallymounted semaphore-arm, means for locking said arm to its safety position, electromagnetic devices for releasing said locking means, an indicating-circuit, an indicator and a source of electric energy in said indicating-circuit, a circuit-closer in said indicating-circuit closable by the arm of the semaphore, a main circuit, a source of electric energy for said main circuit, an electromagnet in said main circuit for holding said circuit-closer closed, substantially as shown and described.

2. A semaphore comprising a pivotallymounted semaphore-arm, means for locking said arm to its safety position, electromagnetic devices for releasing said locking means, an indicating-circuit, an indicator and source of electric energy in said indicating-circuit, a circuit-closer in said indicating-circuit closable by the arm of the semaphore, a main circuit, a source of electric energy for said main circuit, an electromagnet in said main circuit for holding said circuit-closer closed, a casing for said releasing means, said closer and its holding-magnet, said casing having windows all being rotatably mounted to turn in unison with said arm, and a signal-light mounted within said casing substantially as shown and described.

3. A semaphore-signal comprising a supporting-standard, a casing rotatably mounted thereon, said casing having windows, a lamp mounted on said standard within the casing, means for normally locking said casing from rotation with its windows out of register with the signaling-lamp, means for releasing said locking means and means for rotating said casing to bring its windows in register with said lamp substantially as shown and described.

4. A semaphore-signal comprising a supporting-standard, a casing rotatabl y mounted thereon, said casing having windows, a lamp mounted on said standard within the casing, means for normally locking said casing from rotation with its windows out of register with the signaling-lamp, means for releasing said locking means and means for rotating said casing to bring its windows in register with said lamp, and electromechanical means within the casing for operating a distant indicator substantially as shown and described.

5. A semaphore-signal comprising a supporting-standard, a casing rotatably mounted thereon, said casing having windows, a lamp mounted on said standard within said casing, means for normally locking said casing from rotation with its windows out of register with the signal-lamp, electromechanical mechanism mounted within the casing for releasing said locking means, and means for rotating said casing to bring its windows in register with said lamp, substantially as shown and described.

6. A semaphore-signal comprising a supporting-standard, a casing rotatably mounted thereon, said casing having windows, a lamp mounted on said standard within said casing, means for normally locking said casing from rotation with its windows out of register with the signal-lamp, electromechanical mechanism mounted within the casing for releasing said locking means, and means for rotating said casing to bring its windows in register with said lamp, a supplemental electromechanical means within the casing for operat ing a distant indicator when the casing has been rotated substantially as shown and described.

7. A semaphore-signal comprising a supporting-standard, a casing rotatabl y mounted thereon, said casing having windows, a lamp mounted on said standard within said casing, means for normally locking said casing from rotation with its windows out of register with the signal-lamp, electromechanical mechanism within the casing for releasing said locking means, and means for rotating said casing, to bring its windows in register with said lamp, said electromechanical mechanism including a rotary tumbler-lock, and an electromagnet, a main circuit including a source of electric energy in which said magnet is connected, and a switch in said circuit for making and breaking the circuit substantially as shown and described.

8. A semaphore-signal comprising a supporting-standard, a casing rotatably mounted thereon, said casing having windows, a lamp mounted on said standard within said casing, means for normally locking said casing from rotation with its windows out of register with the signal-lamp, electromechanical mechanism within the casing for releasing said looking means, and means for rotating said casing, to bring its windows in register with said lamp, said electromechanical mechanism ineluding a rotary tumbler-lock, and an electromagnet, a main circuit including a source of electric energy in which said magnet is connected, and a switch in said circuit for making and breaking the circuit, a supplemental electromechanical means within the casing controlled by movement of the casing and by the main circuit for operating a distant indicator substantially as shown and described.

9. A. semaphore comprising supportingstandards, an arm having a signal-blade fulcrumed to said standard, locking devices for holding said arm in one position, said arm being gravity-movable to another position, a main electric circuit including a source of electric energy and a cut-out switch, an electromagnet in said main circuit for releasing said locking device, a supplemental electric circuit including a source of electric energy and an indicator, a circuit-closer carried by said standard and connected in said supplemental circuit, means carried by the arm for moving said circuit-closer to its closed position at times, a holding-magnet in the main circuit for holding said circuit-closer in said closed position substantially as shown and described.

10. A semaphore comprising supportingstandards, an arm having a signal-blade fulcrumed to said standard, locking devices for holding said arm in one position, said arm being gravity-movable to another position, a main electric circuit including a source of electric energy and a cut-out switch, an electromagnet in said main circuit for releasing said locking devices, a supplemental electric circuit including a source of electric energy and an indicator, a circuitcloser carried by said standard and connected in said supplemental circuit, means carried by the arm for moving said circuit-closer to its closed position at times, a holding-magnet in the main circuit for holding said circuit-closer in said closed position, and means for checking the movement of said arm.-

11. A signal apparatus comprising the com.- bination with a main and a supplemental circuit, each including a source of electric energy and a controlling-switch in the main circuit; ot' a semaphore, said semaphore comprising a supporting-standard and housing rotatably mounted thereover, an arm pivotally mounted within the housing on said standard, and projected through the periphery of the housing, a signal-holding blade secured to the arm, lock devices mounted on said standard for holding said arm in one position, said arm being gravity-movable to its other position, an electromagnet operated by the main circuit for releasing said lock devices to permit the arm to operate and rotate the casing, and a circuit-closer in the supplemental circuit, mounted within the casing and controlled by said arm and by the main circuit substantially as shown and described.

12. A signal apparatus comprising the combination with a main and a supplemental circuit, each including a source of electric energy and a controlling-switch in the main circuit; of a semaphore, said semaphore comprising a supporting-standard and housing rotatably mounted thereover, an arm pivotally mounted within the housing on said standard, and projected through the periphery of the housing, a signal-holding blade secured to the arm, lock devices mounted on said standard for holding said arm in one position, said arm being gravity-movable to its other position, an electromagnet operated by the main circuit for releasing said lock devices to permit the arm to drop and rotate the casing, and a circuit-closer in the supplemental circuit, mounted within the casing and controlled by said arm and by the main circuit, and means for checking the movement of the arm and the casing.

13. A signaling apparatus comprising the combination with a main and a supplemental circuit, each including a source of electric energy and a controlling-switch in the main circuit; of a semaphore, said semaphore comprising a supporting-standard a housing rotatably mounted thereover, an arm pivotally mounted within the housing on said standard, and projected through the periphery of the housing, a signal-holding blade secured to the arm, lock devices mounted on said standard for holding said arm in one position, said arm being gravity-movable to its other position, an electromagnet operated by the main circuit for releasing said lock devices to permit the arm to drop and rotate the casing, a circuitcloser in the supplemental circuit, mounted within the casing and controlled by said arm and by the main circuit, and means for checking the movement of the arm and the casing, said means comprising a dash-pot connected with the arm and mounted on the standard within the casing.

14. Asignal apparatus comprising the combination with a main and a supplemental circuit, including a source of electric energy, and a controlling-switch in the main circuit; of a semaphore, said semaphore comprising a supporting-standard, a housing rotatably mounted thereover, an arm pivotally mounted within the housing on said standard, and projected through the periphery of the housing, a signal-holding blade secured to the arm, lock devices mounted on said standard for holding said arm in one position, said arm being gravity-movable to its other position, an electromagnet operated by the main circuit for releasing said lock devices to permit the arm to operate and rotate the casing, and a circuit-closer in the supplemental circuit, mounted within the casing and controlled by said arm and by the main circuit, a lamp mounted within the casing, said casing having windows adapted to register with said lamp when the casing has been rotated.

15. A signal apparatus comprising the combination with a main and a supplemental circuit, including a source of electric energy, and a controlling-switch in the main circuit; of a semaphore, said semaphore comprising a supporting-standard, a housing rotatably mounted thereover, an arm pivotally mounted within the housing on said standard, and projected through the periphery of the housing, a signal-holding blade secured to the arm, lock devices mounted on said standard for holding said arm in one position, said arm being gravity movable to its other position, an electromagnet operated by the main circuit for releasing said lock devices to permit the arm to operate and rotate the casing, and a circuit-closer in the supplemental circuit, mounted within the casing and controlled by said arm and by the main circuit, a lamp mounted within the casing, said casing having windows adapted to register with said lamp when the casing has been rotated, and a dashpot connected with the arm and mounted on the standard within the casing for checking the movement of the arm substantially as shown and described.

16. An electric semaphore comprising the combination with a main circuit including a source of electric energy and a cut-out, and a supplemental circuit including a source of electric energy and an indicator; of a support, a housing rotatably mounted thereon, said housing comprising side walls and a peripheral rim, said rim including parts hinged together to form doors, said rim havingaslot for the passage of said support, and said side walls having windows, a semaphore-arm pivoted to said support within the casing, and an arc-bar carried by said arm and passing through said support, said arc-bar having a notch, a tumbler pivotally mounted on said support to engage said notch, said tumbler having a flat portion, an electromagnet mounted on said standard and connected in the main circuit, an armature for said electromagnet, connections between said armature and said tumbler whereby the movement of the armature will rock the tumbler and a circuit-closer within said housing for the supplemental circuit, closable when the arm has moved to its danger position substantially as shown and described.

17. An electric semaphore comprising the combination with a main circuit including a source of electric energy and a cut-out switch in said circuit, and a supplemental circuit including a source of electric energy and an indicator; of a standard, a housing rotatably mounted thereon, said housing comprising side walls, and a peripheral rim, said rim including parts hinged together to form doors, said rim having a slot for the passage of said standard, and said side walls having windows, a semaphore-arm pivoted to said standard within the casing, and an. arc-bar carried by said arm and passing through said standard, said arc-bar having a notch, a tumbler pivotally mounted on said standard to engage said notch, said tumbler having a fiat portion, an electromagnet adjustably mounted on said standard, an armature for said electromagnet, connections between said armature and said tumbler whereby the movement of the armature will rock the tumbler, and a circuit closer within said housing for the supplemental circuit, closable when the semaphore has moved to its danger position, substantially as shown and described.

18. An electric semaphore comprising the combination with a main circuit including a source of electric energy and a cut-out switch in said circuit, and a supplemental circuit including a source of electric energy and an indicator; of a standard, a housing rotatably mounted thereon, said housing comprising side walls, and a peripheral rim, said rim including parts hinged together to form doors, aslot for the passage of said standard, and said .side walls having windows, a semaphorearm pivoted to said standard within the easing, and an arc-bar carried by said arm and passing through said standard, said. arc-bar having a notch, a tumbler pivotally mounted on said standard to engage said notch, said tumbler havinga flat portion, an electromagnet mounted on said standard and connected in the main circuit, an armature for said electromagnet, connections between said armature and said tumbler whereby the movement of the armature will rock the tumbler, bracket members secured to said standard, a holding electromagnet secured to said bracket members and connected in the main circuit, an armature for said holding-magnet connected in the supplemental circuit, a fixed contact in the supplemental circuit mounted on the bracket members for cooperating with the holding-magnet armature and normally separated therefrom, means carried by the arm for moving said holding-magnet armature into engagement with said magnet to cause the armature to engage said fixed con tact to close the supplemental circuitsubstantially as shown and described.

19. An electric semaphore comprising the combination with a main circuit including a source of electric energy and a cut-out switch in said circuit, and a supplemental circuit including a source of electric energy and an indicator; of a standard, a housing rotatably mounted thereon, said housing comprising side walls, and a peripheral rim, said rim including parts hinged together to form doors, a slot for the passage of said standard, and

said side walls having windows, a semaphorearm pivoted to said standard within the easing, and an arc-bar carried by said arm and passing through said standard, said arc-bar having a notch, a tumbler pivotally mounted on said standard to engage said notch, said tumbler having a flat portion, an electromagnet mounted on said standard and connected in the main circuit, an armature for said electromagnet, connections between said armature and said tumbler whereby the movement of the armature will rock the tumbler, bracket members secured to said standard, a holdingelectromagnet secured to said bracket members and connected in the main circuit, an armature for said holding-arm connected in the supplemental circuit, a fixed contact in the supplemental circuit mounted on the bracket members for cooperating with the holdingmagnet armature and normally separated therefrom, means carried by the arm for moving said holding magnet armature into engagement with said magnet to cause the armature to engage said fixed contact to close the supplemental circuit, means adjustably mounted on the standard within the casing for checking the movement of the arm substantially as shown and described.

20. An electric semaphore comprising the combination with a main circuit including a source of electric energy and a cut-out switch in said circuit, and a supplemental circuit including a source of electric energy and an indicator; of a standard, a housing rotatably mounted thereon, said housing comprising side walls, and a peripheral rim, said rim including parts hinged together to form doors, a slot for the passage of said standard, and said side walls having apertures, asemaphorearm pivoted to said standard within the easing, and an arc-bar carried by said arm and passing through said standard, said arc-bar having a notch, a tumbler pivotally mounted on said standard to engage said notch, said tumbler having a flat portion, an electromagnet mounted on said standard and connected in the main circuit, an armature for said electromagnet connections between said armature and said tumbler whereby the movement of the armature will rock the tumbler, bracket members secured to said standard, a holdingelectromagnet secured to said bracket members and connected in the main circuit, an ar mature for said holding-magnet connected in the supplemental circuit, a fixed contact in the supplemental circuit mounted on the bracket members for cooperating with the holding-magnet armature and normally separated therefrom, means carried by the arm for moving said holding-magnet armature into engagement with said magnet to cause the armature to engage said fixed contact to close the supplemental circuit, means adjustably mounted on the standard within the easing for checking the movement of the arm, a

lamp mounted within the housing, said hous ing having transparent colored-glass windows for registering with the lamp when the casing is turned to its danger-indicating position, and means for turning the casing substantially as shown and described.

21. A semaphore comprising the combination with a main and a supplemental circuit each including a source of electric energy, of a support comprising a pair of parallel bars, an arm pivotally secured therebetween, an arcbar secured to and movable with said arm and passing between said supporting-bars, a roller mounted above said arc-bar between said supporting-bars, a tumbler fulcrumed between said standard-bars and below said arc-bar, said arc-bar having a tumbler-receiving notch, a lever connected to said tumbler, a second lever fulcrumed between the supporting-bars below said tumbler, a pitman connecting said levers, an armature on said second lever, an electromagnet in the ,main circuit-and mounted on said standard for operating said lever-armature, a bracket secured to the supporting-bars. a fixed contact member in the supplemental circuit and mounted on said bracket, the movable contact member having an armature portion, a holding-magnet also in the main circuit for holding said fixed and movable contact members together, means carried by the arm for moving said movable contact into engagement with said fixed contact, a check device mounted on the standard for checking the movement of the arm substantially as shown and described.

22. A semaphore comprising the combination with a main and a supplemental circuit each including a source of electric energy, .of a support comprising a pair of parallel bars, an arm pivotally secured therebetween, an arcbar secured to and movable with said arm and passing between said supporting-bars, a roller mounted above said arc-bar between said supporting-bars, a tumbler fulcrumed between said supporting-bars and below said arc-bar, said arc-bar having a tumbler-receiving notch, a lever connected to said tumbler, a second lever fulcrumed between the supporting-bars below said tumbler, a pitman connecting said levers, an armature on said second lever, an electromagnet connected in the main circuit and mounted on said standard for operating said lever-armature, a bracket secured to the supporting-bars, a fixed contact member and a movable contact member in the supplemental circuit and mounted on said bracket, the movable contact member having an armature por tion, a holding-magnet also in the main circuit for holding said fixed and movable contact members closed, means carried by the arm for moving said movable contact into engagement with said fixed contact, a check device mounted on the standard for checking the movement of the arm, a third bracket secured to the standard, a lamp carried by said bracket, a casing rotatably mounted on the standard and inclosing the parts carried by the standard, said casing having apertures to register with the lamp at predetermined times, substantially as shown and described.

CLAYTON E. FREDERIOKSON.

Witnesses:

L.- F. CRAWFORD, JEAN F. WEBB, Jr.

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