US1396936A

US1396936A - Lighting-fixture

Info

Publication number: US1396936A
Application number: US331622A
Authority: US
Inventors: Albert R Locke
Original assignee: Individual
Current assignee: Individual
Priority date: 1919-10-18
Filing date: 1919-10-18
Publication date: 1921-11-15
Anticipated expiration: 1938-11-15

Description

A.' H. I 'OCKEI LIGHTING FIXTURE.

APPLlcAloN FILED ocT.18,1919.

,396',936, Patented Nov. 15, 1921..

56 I Z 12 35 l A Y 37 7J l d H- u 36 i I 35 3Q 36 A. R. LOCK. LIGHTING F'IXTURE. Annie/mon FILED 001.18, 1919.

l1,396,936. PmmdNov. 15,1921.

2 SHEETS-SHEET 2.

UNITED STATES `'r'.arlln'r oli-"Fics,

ALBERT R. LOCKE, OF CHICAGO, ILLINIS.

To all who/m, t may concern.'

Be it known thatI, ALBERT R. Loolm, a citizen of the United States, residing at Chicago,`in4 the county of Cook and State of Illinois, have inventedY certain new and useiul Improvements in Lighting-Fixtures, of which the following is a specification.

This invention relates to lighting fixtures.

In `'the auditoriumsI of theaters, churches, convention halls, etc., where members of the audience may come and go while the auditorium is darkened, it is highly desirable to provide a confined or restricted light for illuminating the aisles,stairs, etc., so as to facilitate the entrance and exitof the audience. This illumination shouldybe suflicient to avoid accidents and confusion, but should not interferewith the general darkened condition of the auditorium or affect the eyes orrvision'of the members of the audience.

j One of the objects of the invention is to provide an improved lighting fixture for the aisles, stairways, etc., of auditoriums.

Another object is to provide `an improved fixture for confining the light so it will not interferewith the general darkened condition of an auditorium.`

j Another `object is to provide a lighting 'fixture which contines the light near the Hoor. j

Another object is to provide a lighting fixture which is simple `and reliable.

Another object `is to `provide a fixture which may be `easily installed in new or old buildings. f i l i Another object is to provide a lighting fixture which may be readily made from standard parts. j

Another `object is `to rovideA a fixture which may be readily adjusted to give the desired volume and directionof 1i ht. j

Other objects and advantages will appear from the specification and claimsx A An embodiment of the invention is illustrated in the accompanying drawings, in whichi F igure "1 is an elevation of a lighting attachment in place.`

Fig. 2 is a section on `line 2-*2 of Fi 1. j Fig. 3 is a sectionon line-33 of ig. 2and@` 4 i Fig.` 4 is a central section on line 4 4 j i 1 lighting .attachment campaa Speciicationof Letters Patent.

`Application filed October 18, 191B. Serial `N o.

passa-ge of the conducting wires. `has an opening therethrough for the passage `of conductors 15 and 16.

general a base or receptacle housing 5, supported on a junction box 6, and a' light conlining and directing lamphousing 7o The receptacle is a substantially cylindrical cup having its upper end closed by a `cover 8. The cup may be drawn from a single piece of sheet metal. One of the well known knock-out junction boxes serves the purpose well. Cover 8` supports a lamp socket having a Vbase 9 below the cover and a threaded clamping nut 10 above the cover. Base 9 is a cylindrical body oi." insulating material, such as porcelain, having a cylindrical recess 11, to the bottom of which isA secured in the ordinary manner an inner lampV contact 12 and an outer lamp contact 13. Contact 13 is a threaded thimble of the ordinary type, the base of an incandescent j Patented Nov. 15, 1921.

lamp 14 screwing into the inside of the thimble and nut 1() screwing to the outside thereof. The conducting wires 15 and 16 are secured respectively to the inner and outer contacts of the lamp socket by terminal screws 17 and 18. Nut 10 is also of i f and cover together. A rubber washer 19I serves to make a tight joint and prevent breakage of the porcelains. l

`lunction box 6 may beof the usual drawn metal knock-out or cast types.- It has a cover 25, secured thereto by suitable screws l 26 which pass through the cover into threaded lugs 27, projecting` from the inner walls of thebox. The sides of the box are provided with suitable openings for the Cover 25 This opening is provided with a metal bushing 28 which is externally screw threaded to receive a nut 29. The bottom ofreceptacle `5 and cover 25 are securely clamped together between Vthe head of bushing 28 and Vnut 29. The

junction box may be set into the floor, so that its upper edge is approximately flush therewith. The junction box thus serves to firmly support the receptacle and lamp housing of` the fixture.

`Lamp housing 7 is made up of a series of rings 35 having outwardly extending annular timpani The so called open or Vso canopy covers employed with pressed steel outlet for junction boxes have been found to be admirably fitted for use as these rings. The rings of commerce are black and substantially non-reflecting. m

Rings are placed one above the other, being spaced apart by hollow spacing bushings 37. Bushings 37 are of such a height that there are openings 39 between rings 36'for the passage of light. By making the bushings of different heights the amount of light which escapes from the housing can be varied. The rings are providedwith openings for the passage of clamping bolts andthe rings Vand bushings are threaded upon these bolts in the desired number, as clearly shown'in Fig. 3. The lower ends of two ofthe bolts are bent over to form stops 46 which coperate with lugs 47, projecting inwardly from the wall of the receptacle 5 and through which the bolts pass, to secure the lamp housing to the receptacle. The upper ends of bolts 45 are threaded to receive threaded spacing bushings 48. All 'of the clamping nuts need not pass through and be held by lugs on the receptacle. Three clamping bolts have been found to be sufficient to firmly hold the-members of the housing together and by spacing them 90 degrees apart,half of the housing presents no obstruction to the passage of light from the spaces 'between the rings, When three Vclamping bolts are employed, two may coperate with lugs in the receptacle, as previouslydescribed, and one may be simply av slotted headed bolt 49 of the usual type.

'Bolt 49 coperates with the cover of the receptacle to clamp a section of the spacing ring in place;

The top of the lamp housing is closed by a cover 55 which is of the same general shape Cover 55 is secured in place by screws4 56 Vwhichjpass through openings in the flange ofthe cover and screw into the threaded bores of bushings 48.

, The rings below thel coverr are clamped in spaced relation by screwing bushings 48 upon the threaded ends of

bolts

45 and 49,

so that the members forming the lamp hous- `ing presenta rigid structure whether or not the cover 1s applied. This is of advantage as the cover may be removed to gain access toA theinterior ofthe housing, by simply removing` screws 56, and the rest of the structure remains intact.

To obstruct the passage of light between the several rings and between the rings and cover, except inV avdesired direction and to reflect the light which doesnot directly pass through the spaces therebetween, an adjustable screen and reflector 57 is provided within the lamp housing. This screen and reflector is a semi-circular metal plate which fits snugly against` the inner walls of rings 35 and cover 55.v When the housing cover 55 is removed the screen may be moved to any position to give the desired screening and direction of the light.

The light passing from the interior of the lamp housing between the several rings and between the rings and the cover is prevented, largely, by annular flanges 36, from radiating vertically. It is directed laterally and downwardly in a particular direction, dependent upon the position of screen 57, and although it illuminates the floor suflieiently to guide the audience in the aisle and on the stairs, it'does not interfere with the general darkened condition of an auditorium or shine into the eyes of the audience or affect the vision. The light which does not pass directly from the lamp through the spaces between the rings is reflected by the screen and reflector so that the light eilioiency of the fixture is high. The fixture may be readily applied under the seats or in the corners where it is out of the way. It presents a neat appearance, confines the light, except in a desired direction, provides for adjustment of the direction in which the light is cast, may be readily taken apart or opened for inspection, adjustment and replacement of the lamp, is made of standard parts familiar to the trade, and

may be made of any desired height to acscreen for obstructing the passage of light through n portion of the spaces between said rings.

2. A lighting fixture. having a socket receptacle, a plurality of spaced substantially non-reflecting rings mounted on said receptacle to form a lamp housing, a lamp socket carried by the top of said receptacle to support a. lamp within the housing, and means for clamping said rings in spaced relation to said receptacle.

3. A lighting fixture havin a lamp housing formed of a plurality o separate substantially non-reecting rings, means for holding said rings in spaced relation to allow the passage of light therebetween in a downward and lateral direction, a lamp a substantially closed box, and means within the box for supporting a lamp within the housing.

A lighting fixture comprising a plurality of' separate rings held inspaced relation vto prevent the passage of light therebetween `in a. vertical direction, but allowing the passage of light in a lateral and downward direction, and a movable screen cooperating with said rings to substantially prevent the passage of any light between said rings except in a given direction.

6. A lighting fixture comprising the combination of a plurality of separate substantially-non-reflecting rings having annular flanges, one flange of' each ring in a substantiall vertical plane and the other flange in a su stantially horizontal plane, a plurality of spacers between said rings to form open ings therebetween for the passage of light, the flanges in said rings directin the light only in a lateral and downwar direction and preventing the passa-ge of light in an upward direction, a cover cooperating with said rings to form a lamp housing, and means for releasably` clamping said rings, spacers and cover together.

7 A lighting attachment having a junction box for the passage of conducting Wires, a receptacle mounted upon said junction box, and a housing formed of a plurality of separate rings held in spaced relation to provide spaces for the passage of light, and mounted upon said receptacle.

8. A li hting attachment havin a junction box or the passage of conducting wires, a receptacle mounted upon said junctlon box, a housin formed of a plurality of separate rings held in spaced relation to provide spaces for the passa e of light and mounted upon said receptac e and a lamp socket carried by said receptacle for supporting a lampwithin the housin 9. A lightin fixture iaving in combination a receptac e; a cover therefor; a lamp socket mounted on said cover; a housing formed of a plurality ofrings having annular outwardly extending flanges, bushings between said rings to hold the same in spaced relation to provide passages for the flow of light therebetween, and clamping screws tor holding said rings, bushings and cover to the cover of said receptacle, and a. movable screen within said housing for preventing the passage of light between said rings in some directions, but allowing the passage of light in other directions and refleeting the light from the directions in which passage 1s presented to the directions in which passage of light is permitted.

10. A lighting fixture having in combination a receptacle housing with an opening to receive conducting wires; a lamp receptacle secured therein; a lamp in said receptacle; a housing for the lamp mounted on the `receptacle housing and having parts to prevent light from radiating abovea horizontal plane.

1l. A lighting fixture having in combination a receptacle housing with an opening to receive conducting wires; a lamp receptacle secured therein; a lamp in said receptacle; a housin for the lamp mounted on the receptacle ousing and a junction box secured to the receptacle housing and communicating therewith.

12. A lighting fixture having in combina tion a receptacle housing with an opening to receive conducting wires; a lamp receptacle secured therein; a lamp in said receptacle; a housing for the lamp mounted on the receptacle housing to be located above a floor line when in use; a junction box supporting the structure and communicating therewith and means whereby to connect conduits to said junction box below the floor line.

In testimony whereof I hereunto subscribe my name.

ALBERT R. LOCKE.