Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS1572214 A
Publication typeGrant
Publication date9 Feb 1926
Filing date21 Jan 1924
Priority date21 Jan 1924
Publication numberUS 1572214 A, US 1572214A, US-A-1572214, US1572214 A, US1572214A
InventorsGeorge S Clayton, Luther B Mcewing
Original AssigneeGeorge S Clayton, Luther B Mcewing
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Road-surface signal lamp
US 1572214 A
Images(1)
Previous page
Next page
Description  (OCR text may contain errors)

Feb. 9 1926. 1,572,214

-L. B. MCEWING ET AL Patented Feb. 9, 1926.

UNITED STATES PATENT ()FFICE.

LUTHER B. MCEWING AN D GEORGE S. CL AYTON, OF CHICAGO, ILLINOIS.

ROAD-SURFACE SIGNAL LAMP.

Application filed January 21, 1924. Serial No. 687,462.

To all whomit may concern:

Be it known that we, LUTHER B. Mo- EWING and GEORGE S. CLAYTON, both citizens of the United States, and residents of the city of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in a Road- Surface Signal Lamp; and we do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification.

This invention is related to traffic signals of the type that give an indication to automobile drivers by making an illuminated place in the roadway without presenting an pblstaole against which the vehicle may col- It is an object of this invention to devise a. signal of the class described which shall present no part projecting above the surface of the roadway.

It is a further object of this invention to devise a signal of this sort which shall give an upwardly extending beam of light instead of an illuminated object near the surface of the road.

It is a further object of this invention to give an inclination to the upwardly extending beam when road conditions require it.

It is a further object of this invention to provide a housing for a lamp beneath the surface of the roadway in which the lamp shall be amply protected from moisture or dust.

Other and further objects of this invention will be apparent from the disclosures in the specification and the accompanying drawm s.

The invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described.

On the drawings:

Figure 1 is a vertical section with parts in elevation illustrating a lamp structure embodying this invention. I I V Figure 2 is a top plan view of the structure. Figure 3 is a view similar to Figure 1 illustrating a slightly modified form.

As shown on the drawings:

The road surface 10, which may be of concrete, asphalt,macadam or any other enduring material, is provided with a recess into which a metallic casing 12 is set. This casing has a flange 14 flush with the surface of the roadway, and a pocket 15 extending deep enough to accommodate a lamp and a lens. The flange 14 is connected to the upright wall of the pocket by a connection of Z-shaped cross section. The upright wall of the casing extends above this cross section to afford an upstanding flange 16, the outer surface of which is threaded. The upright part 17 of the connection is spaced away from the flange 16 a sufficient distance to accommodate a ring 18, which is threaded to cooperate with the threads upon the flange 16. The upper part of the ring 18 has an inwardly extending annular flange 20 which is provided with a pair of arcnate slots 21. Preferably these slots extend nearly through a semi-circumference in order that they shall not become so completely filled with dirt that a spanner wrench cannot be used therein.-

The wall of the pocket 15 has an inwardly projecting annular flange near the upper part thereof, as shown at 22, and the upper surface of this flange stands opposite the under surface of the flange 20 upon the ring 18. Held between the flange20 and-the flange 22 is a lens 24, and packing 25 is' provided between the lens and each of these flanges. The flange 22 also serves to laterally support the upperedge of a parabolic recable 31 screws onto the lower end of the.

lamp socket. It is provided with a flange 32.

A packing 30 is provided above the flan e 32 to insure a water-tight joint. The cab e 31 extends through any desired conduit and feedsthe lamp 28.

In the form shown in Figure 3, the under surface of the lens 24 is provided with a series of prisms 32 all parallel to one another and all facing the same way.

In the assembly of the device, the cable 31 has the cap 41 attached thereto and is placed in its conduit, the cap 41 being thus in position to come against the hole in the ,bottom of the castingl12. This casting 12 is put in place in t e surfacing material 10f the road 10 when the road is built, the cable 31 or the conduit for the cablebeing laid at the same time. The reflector 26 is placed in the pocket 15 with the hole 111 its apex placed to receive the socket 27 of the lamp 28. The socket 27 is then screwed into the cap 41' and-the flange 40 on the socket 27 being pressed against the mirror 26 draws the outer flange 32 against the packing 80. This makes a tight joint which will prevent any seepage of moisture from the roadbed into the pocket 15.

The lamp 28 is then screwed into the socket 27. The packing 25 is placed on the upper surface of the flange 22; the lens 24 is placed on this packing; the other packing 25'is placed on the lens 2%; and the ring 18 is screwed -home.

This ring fits closely between the upright part 17 of the connection and the upright flange 16 so that no dirt is likely to enter into the groove between these upright parts and prevent ready removal of the ring when necessary for inspection or repairs. The ring is manipulated by placing a spannertool in the grooves 21. If these grooves are partly filled with dirt, there will be rotation of the tool until the dirt packs between it and the necks 34 which separate the ends of the grooves. When the dirt has thus packed, the ring will be turned by further movement of the spanner tool. The grooves are long enough to make it easy to clean out enough space for the lugs of the spanner tool to be inserted at some point in each groove. Thus the accumulation of dirt in the grooves 2L will not prevent manipulation of the ring.

When thc'lamps are illuminated, in the form shown in Figure 1, a shaft of light will extend upwardly from the signal. The approaching automobilist will see a vertical column of light, which will be visible because of the impingement of this shaft of light tn the dust, moisture or other particles in the air. If the automobilist should ignore this signal, or by bad steering should run against the signal, the automobile will pass over the level surface afforded by the flange 14, the ring 18 and the lens 24 without damage to the signal and without danger of upsetting the automobile.

In the form shown in Figure 3, the column of light emerging from the signal, instead of being vertical will be oblique because of the action of the prisms 32. A signal of this character would be used at or near a turn in the road, the slant of the column of light indicating to the automobilist the direction of the turn, so that the automobilist can prepare for such a turn.

\Ve are aware that numerous details of construction may be varied through a wide range without departing from the principles of this invention, and we therefore do not purpose limiting the patent granted otherwise than necessitated by the prior art.

We claim as our invention:

1. In a lamp casing for a roadway, a housing, an exterior flange on said housing spaced therefrom to form a groove between said flange and the wall ofsaid housing, an interior flange on said housing, a ring fitting said groove, and a lens adapted to be clamped between said interior flange and said ring.

2. In a traflic signaling device, light-containing means disposed in and substantially flush with the roadway, and means associated therewith for projecting a shaft of light therefrom upwardly and obliquely.

3. In a trafllc signaling device, light-containing means disposed in and substantially flush with the roadway, and means associated therewith for projecting a shaft of light therefrom upwardly and obliquely, said projecting means being adjustable in said light-containing means.

In testimony whereof, we have hereunto subscribed our names.

LUTHER B. McEWVING. GEORGE S. CLAYTON.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2418687 *29 Feb 19448 Apr 1947Arnesen Walter ACautery transformer
US3096024 *26 Apr 19612 Jul 1963Outlook Engineering CorpMarker light
US3114892 *19 Feb 195917 Dec 1963Univ CaliforniaRunway guidance system
US3376413 *13 May 19662 Apr 1968E F L IncMemorial light
US5390090 *2 Sep 199214 Feb 1995Nau; Larry J.Ground supported lamp
US5676448 *27 Aug 199614 Oct 1997Thorn EurophaneLight fixture for runways or taxiways
US5778625 *11 Oct 199614 Jul 1998Bega/Us, Inc.Recessed lighting fixture and method of installing
US5785410 *28 May 199628 Jul 1998Branson, Sr.; Michael DelElectronic road beacon
US5839816 *13 Dec 199524 Nov 1998Atsi, LlcRoad marker
US673973520 Sep 200125 May 2004Illuminated Guidance Systems, Inc.Lighting strip for direction and guidance systems
US7021786 *7 Jul 20034 Apr 2006Sandor Sr Frederick JIlluminated glass deck light panel and method of installation
US768822210 Feb 200530 Mar 2010Spot Devices, Inc.Methods, systems and devices related to road mounted indicators for providing visual indications to approaching traffic
US785943126 Jun 200928 Dec 2010Spot Devices, Inc.Methods, systems and devices related to road mounted indicators for providing visual indications to approaching traffic
US7883234 *18 Apr 20088 Feb 2011Spot Devices, IncEmbeddable lighting systems
US8152334 *3 Oct 200810 Apr 2012Lsi Industries, Inc.LED lighting assembly with adjustment means
US8328463 *6 Oct 200811 Dec 2012Thomas Dudley LimitedReflective road marker
US85679911 Nov 201229 Oct 2013Lsi Industries, Inc.LED inground light
US20100310311 *6 Oct 20089 Dec 2010Martin DudleyReflective road marker
US20120140458 *15 Feb 20127 Jun 2012Lsi Industries, Inc.Led inground light
EP0688903A2 *14 Jun 199527 Dec 1995Nippon Liner Co., Ltd.Self-emission road studs
EP0900882A2 *7 Apr 199810 Mar 1999Aqua Signal AktiengesellschaftMethod of traffic guidance by marker lights flush mounted in the ground as well as marker light and group of marker lights
EP1179637A1 *16 Feb 200113 Feb 2002Sekisui Jushi Kabushiki KaishaRoad sign device and spontaneously emitted light sign system used for the device
WO1993012299A1 *3 Dec 199224 Jun 1993Larry J NauGround supported lamp
WO1997003250A1 *11 Jul 199630 Jan 1997Atsi L L CRoad marker
WO1997045596A2 *27 May 19974 Dec 1997Branson Michael D SrElectronic road beacon
WO2003024188A2 *19 Sep 200227 Mar 2003Illuminated Guidance Systems ILighting strip for direction and guidance systems
Classifications
U.S. Classification362/153.1, 404/16, 362/145, 220/3.8, 340/905
International ClassificationE01F9/06
Cooperative ClassificationF21S8/022, E01F9/065, F21W2111/02
European ClassificationF21S8/02F, E01F9/06B