US567338A - farmer - Google Patents

Description

(No Model.) 5 Sheets-Sheet 1;

J. R. PARMER. ELECTRIC SIGNAL LAMP.

No. 567,338. Patented Se t. 8, 1896.

' (No Model.) 5 Sheets-Sheet 3.

J. R. FARMER. ELECTRIC SIGNAL LAMP.

No. 567,338. Patented Sept. 8, 1896.

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(No Model.) 5"Sheets-Sheet 4.

J. R. PARMB-R. ELECTRIC SIGNAL LAMP.

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- J. R. FARMER.

ELECTRIC SIGNAL LAMP.

No. 567,338. Patented Sept. 8, 1896.

V UNITED STATES- PATENT ()FFIcE.

JOHN R. FARMER, ST. LOUIS, MISS OURI, ASSIGNOR TO THE FARMER ELECTRICAL GOMPANY, OF SAME PLACE.

ELECTRIC SIG NAL-LAM P.

SPECIFICATION forming part of Letters Patent No. 567,338, dated September 8, 1896. Application filed March 14, 1895. Serial No. 541,664. (No model.)

To all whom it may concern.-

Be it known that LJOHN R. FARMER, of the city of St. Louis, State of Missouri, have invented a new and useful Improvement in Electrio Signal-Lamps, of which the following is a description, reference being had to the accompanyin g drawings,formin g a part of this specification.

My invention relates to that class of signallamps which show a danger or right-of-way light at the crossing of electric railways. The object of my invention is to provide a lamp that will revolve automatically on the approach of a car by means of a simple mechanism operated by an electric connection formed by the trolley of the car, which closes a circuit through the magnet f the lamp and turns the lamp so as to throw a white light in the direction the car is moving and a red light in the direction of the cross-line.

Referring to the drawings, Figure I illustrates a side elevation of the lamp and the superimposed electromagnet. Fig. II illustrates a top view of the electromagnets, showing the wiring, contacts, and brushes. Fig. III illustrates a cross-section of the same portion of the device as shown in Fig. II through the line II II. Fig. IV illustrates a top View of the turning mechanism with the armatureandmagnetsremoved. Fig.Villustrates a bottom view of Fig. II, showing the fuse-block. Fig. VI illustrates in detail the electromagnets, showing the armature drawn to the left coil. Fig. VII shows the same view with the armature drawn to the right.

Fig. VIII illustrates a modified form of turning mechanism. Fig. IX shows a cross-section of the same. Fig. X is a diagram showing a double-track cross-line with the lamp in the center of the crossing. diagram showing one lamp in the lantern and other lamps used for meeting the resistance. Fig. XII is a cross-section of the lantern, showing four lights therein.

The same numbers designate the same or similar parts throughout the several figures.

1 is the hood, placed over the device.

2 is a rectangular frame secured thereto and supporting a second frame 3, to which the electromagnets 4 are fastened.

, 5 is the lamp, suspended from the center of Fig. XI is a the frame 2, having four lights, alternately white and red.

6 is the wire, through which the current of electricity is introduced. This current is turned through the device from the trolley wire by means of any suitable construction of circuit closer and breaker A B, which may be of any suitable construction. Ihave illustrated the construction shown in my application, Serial No. 536,224, filed January 25, 1895.

7 is a binding-post. nection therewith.

9 is a contact-plate rigidly secured by means of the insulator 10 to the armature 11.

12 is a wire passing from contact 9 to the electromagnet l. F

13 is the core of the electromagnets. 14 is the wire leading from the said electromagnet to the fuse-block 16.

r 16 is a fuse-block. therefrom to the lamp.

18 is a ground-Wire.

19 is acrankpin carried on the armature 11.

20 is a crank adapted to be turned by the 8 is a brush in con- 17 is the wire leading pin 19, said pin moving in the sliding joint 21.

22 are springs secured to binding-screws 23 in the frame 2 and attached to the crank 20, they being adapted to keep the said crank in a fixed position unless it is turned by the crank-pin 19.

24 is ashaft secured to the crank 20 and turned thereby, said shaft supporting the lantern 5.

15 is the ground-wire binding-post.

The operation of the device is as follows: A current of electricity turned bythe circuit maker and breaker A A, located on the wires of one of the cross-tracks (see Fig. X) and entering the device through the wire 6, passes through the binding-post 7 t0 the brush 8. If, as shown in Figs. I, II, and VI, this brush is in contact with plate 9, the current is conducted therethrough to the coil aboutthe electromagnet 4. Upon this occurringthe when the car approached on the other crossline, then the reverse action would occur, the electromagnet at would be used, and the armature would be drawn to it instead of to 4:, as described. The current of electricity passes from the electromagnet-coil out through wire 14 to. the fuse-block 16, thence to the lamp 5. WVith each movement of the armature 11 to one or the other of the magnets the pin 19, attached to said armature, makes a backward or forward motion. This pin rides in a slot 21 of a crank 20, said crank being secured to the shaft 24, which supports the lamp. The backward and forward motion of the crank-pin 19 thus imparts an oscillating motion througha limited arc of, say, one-eighth or one-quarter of a circle,which inturn moves the lamp 5 through the same are. If the motion is through one-quarter of a circle, a white li-ght,'which has been thrown in the direction atJri-ght angles to that of an approaching car, will be turned into the direction of the car and a red light will be shown in the direction or the cross-line. 'Figs. VIII and 1X show a modified form of changing the longitudinal motion of the armature to rotary. Instead of carrying a pin 19 it is'furnished with a rack 19. This rack is adapted to turn a cog-wheel 20, to which the lamp 5 is secured. Both where a crank 20 and crank-pins 19 and a rack 19 and cogwheel 20 are used springs 22 and 22 are secured theretoand are adapted to turn the lamp back to its normal position after having been turned therefrom by the action of the armature and magnet.

Fig, XI illustrates in diagram my method Fig. XII shows all four lights in the emtern 5.

I claim as my invention- In an automatic signal for electric railwaycrossings the combination of the crossing trolley-wires having adjacent thereto contacts to be charged by impingement of the trolley, a movable signal-lamp, an armature controlling the movements of said lamp, electromagnets moving said armature in opposite directions, a conductor leading to ground, conductors leading from the trolley-contacts to contacts at opposite ends of the armature, brushes carried by the armature and adapted to impinge on their respective contacts by opposite movements of the armature, conductors connecting the respective brushes with'corresponding magnets, and wires connecting both magnets with the common ground connection, through the lamp so that when either trolley-contact and trolley-wire are bridged by a trolley-wheeh-the contact,the corresponding magnet, and the lamp are connected in a series circuit branched from the main line and independent of the motor and the connection from the other track is me chanically interrupted, as explained.

JOHN R. FARMER.

In presence of- STANLEY STONER, W. FINLEY.

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