US2131117A - Globe type explosionproof fixture - Google Patents
Globe type explosionproof fixture Download PDFInfo
- Publication number
- US2131117A US2131117A US1623A US162335A US2131117A US 2131117 A US2131117 A US 2131117A US 1623 A US1623 A US 1623A US 162335 A US162335 A US 162335A US 2131117 A US2131117 A US 2131117A
- Authority
- US
- United States
- Prior art keywords
- globe
- fixture
- guard
- explosionproof
- hood
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000010276 construction Methods 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000011324 bead Substances 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 238000004880 explosion Methods 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V25/00—Safety devices structurally associated with lighting devices
- F21V25/12—Flameproof or explosion-proof arrangements
Definitions
- My invention relates to lighting fixtures.
- One of the objects of my invention is to provide an improved explosion-proof fixture which will have high efiiciency and desirable light distribution, with ample strength to withstand the pressure of internal explosions without breaking down or permitting flame, hot gases or sparks to escape and ignite the surrounding atmosphere.
- a further object of my invention is to provide such a construction of a type involving the use of a bulb-enclosing globe, having a small reflector inside of the casing for directing light through the globe.
- a further object of my invention is to provide improved means for holding the glass globe in the globe holder or guard.
- a further object is to provide an explosionproof fixture of the type indicated having an external reflector surrounding the globe.
- a further object is to provide improved means for holding the externalreflector on the fixture or guard.
- a further object is to provide improved means for effecting a tight connection between the globe and the rest of the fixture.
- Figure 1 is a side elevational view of an explosion-proof fixture, parts being broken away to show the interior;
- Fig. 2 is a section on the line 22 of Fig. 1;
- Fig. 3 is a section on the line 3-3 of Fig. 1;
- Fig. 4 is an enlarged sectional view of a detail.
- an explosion-proof lighting fixture including a metal hood I, a metal supporting and retaining member 2 screwed into the lower part of the hood, a glass glob-e 3 having a tight engagement with the supporting and retaining member 2 and cooperating with the hood I to form a tight enclosure, a socket 4 mounted on the hood I and held therein by the retaining member 2 for supporting a lamp bulb 5 with its light source extending into the glass globe 3, an annular. reflector member 6 mounted on.
- the supporting member 2 for reflecting light from the light source through the globe 3, a metal supporting guard screw-threaded onto the supporting member 2 for clamping theoutwardly extending annular flange 8 on the globe 3 tightly against the metal supporting member 2, and an external annular reflector member 9 mounted on the guard 1 for reflecting light rays falling thereon coming from the light source through the globe 3.
- the socket 4 is a one-piece porcelain socket so constructed as to provide a barrier between the space within the globe 3 and the upper part of the hood so that explosions originating in either space cannot be transmitted to the other.
- the an-- nular flange III on the one-piece socket is provided with a gasket construction, including an asbestos washer I I held in place on the flange by means of an aluminum band I2 spun over the flange ID on the socket.
- a gasket construction including an asbestos washer I I held in place on the flange by means of an aluminum band I2 spun over the flange ID on the socket.
- the socket In order to position the socket in the hood, the socket is provided with a groove I3 cooperating with a rib I4 on the hood.
- a set screw I5 is provided for preventing the supporting member 2 from becoming unscrewed.
- the internal annular reflector 6 may be of any suitable type, that shown being an aluminum reflector secured to the supporting member 2 by means of screws I6.
- the lower edge of the metal supporting member 2 is finished smoothly and the upper face of the flange 8 on the globe is ground on that portion which engages the supporting member.
- the gask-et construction at this point comprises an asbestos washer I! (Fig. 4) held in place on the.
- the external reflector member 9 may be of any suitable type, that shown being porcelain enameled steel with a white inside reflecting surface.
- which embraces annular beads 22 and 23 (Fig. 1) on the guard and reflector member, respectively.
- This clamping band may be tightened up by means of a screw 24 swiveled in alug 25 on one end of the band 2
- a large portion of the light from the light source passes directly through the lower portion of the globe 3 as a direct cone of light.
- the portion falling on the internal auxiliary refiector 6 is reflected therefrom outwardly through the globe.
- the portion passing through the globe and falling on the external reflector 9 is reflected therefrom in such a way as to give a generally spread light beam.
- the light distribution is such as to give a high efiiciency and a desirable spread.
- the construction is such that the fixture has ample strength to withstand the high pressures of internal explosions without breaking down or permitting flame, hot gases or sparks toescape and ignite the surrounding atmosphere.
- An explosion-proof fixture comprising a hood construction, a cup-like glass globe, a cup-like guard embracing said cup-like globe, a lamp socket mounted in said hood construction for supporting a lamp bulb so that it extends into said globe, said hood construction being provided with an annular skirt member for supporting said cuplike globe and said cup-like guard, said guard 10 having an outwardly-extending annular bead, a reflector surrounding said guard and having an annular bead adjacentand below said guard bead, and a split channeled ring surrounding and emthe guard V PAUL D. PHILLIPS.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Securing Globes, Refractors, Reflectors Or The Like (AREA)
Description
Sept. 27, 1938. P. D. PHILLIPS v GLOBE TYPE EXPLOSIO NPROOF FIXTURE Filed Jan. 14, 1955 I III:"
Patented Sept. 27, 1938 PATENT OFFICE I 2,131,117 GLOBE TYPE EXPLOSIONPROOF FIXTURE Paul D. Phillips, Elmhurst, Ill., assignor to Benjamin Electric Mfg. Company, Des Plaines, 111., a corporation of Illinois Application January 14, 1935, Serial No. 1,623
1 Claim.
My invention relates to lighting fixtures.
One of the objects of my invention is to provide an improved explosion-proof fixture which will have high efiiciency and desirable light distribution, with ample strength to withstand the pressure of internal explosions without breaking down or permitting flame, hot gases or sparks to escape and ignite the surrounding atmosphere.
A further object of my invention is to provide such a construction of a type involving the use of a bulb-enclosing globe, having a small reflector inside of the casing for directing light through the globe.
A further object of my invention is to provide improved means for holding the glass globe in the globe holder or guard.
A further object is to provide an explosionproof fixture of the type indicated having an external reflector surrounding the globe.
A further object is to provide improved means for holding the externalreflector on the fixture or guard.
A further object is to provide improved means for effecting a tight connection between the globe and the rest of the fixture.
Further objects and advantages of the invention will be apparent from the description and claim.
In the drawing, in which my invention is illustrated,
Figure 1 is a side elevational view of an explosion-proof fixture, parts being broken away to show the interior;
Fig. 2 is a section on the line 22 of Fig. 1;
Fig. 3 is a section on the line 3-3 of Fig. 1; and
Fig. 4 is an enlarged sectional view of a detail.
Referring now to the drawing in detail, the construction shown comprises an explosion-proof lighting fixture including a metal hood I, a metal supporting and retaining member 2 screwed into the lower part of the hood, a glass glob-e 3 having a tight engagement with the supporting and retaining member 2 and cooperating with the hood I to form a tight enclosure, a socket 4 mounted on the hood I and held therein by the retaining member 2 for supporting a lamp bulb 5 with its light source extending into the glass globe 3, an annular. reflector member 6 mounted on. the supporting member 2 for reflecting light from the light source through the globe 3, a metal supporting guard screw-threaded onto the supporting member 2 for clamping theoutwardly extending annular flange 8 on the globe 3 tightly against the metal supporting member 2, and an external annular reflector member 9 mounted on the guard 1 for reflecting light rays falling thereon coming from the light source through the globe 3.
The socket 4 is a one-piece porcelain socket so constructed as to provide a barrier between the space within the globe 3 and the upper part of the hood so that explosions originating in either space cannot be transmitted to the other.
In order to effect a tight engagement, the an-- nular flange III on the one-piece socket is provided with a gasket construction, including an asbestos washer I I held in place on the flange by means of an aluminum band I2 spun over the flange ID on the socket. When the retaining member 2 is screwed tightly into the hood, it effects a seal adjacent the annular flange I0 on the socket, due to the gasket construction. A removable inspection plug I2a. may be provided for access to the wiring terminals.
In order to position the socket in the hood, the socket is provided with a groove I3 cooperating with a rib I4 on the hood. A set screw I5 is provided for preventing the supporting member 2 from becoming unscrewed. The internal annular reflector 6 may be of any suitable type, that shown being an aluminum reflector secured to the supporting member 2 by means of screws I6.
In order to provide a tight seal between the glass globe 3 and the supporting member 2, the lower edge of the metal supporting member 2 is finished smoothly and the upper face of the flange 8 on the globe is ground on that portion which engages the supporting member. The gask-et construction at this point comprises an asbestos washer I! (Fig. 4) held in place on the.
The external reflector member 9 may be of any suitable type, that shown being porcelain enameled steel with a white inside reflecting surface.
This is held in place on the guard by means of I an annular clamping band 2| which embraces annular beads 22 and 23 (Fig. 1) on the guard and reflector member, respectively. This clamping band may be tightened up by means of a screw 24 swiveled in alug 25 on one end of the band 2| and threaded into a lug 26 secured to the other end of the band. I
In use, a large portion of the light from the light source passes directly through the lower portion of the globe 3 as a direct cone of light. The portion falling on the internal auxiliary refiector 6 is reflected therefrom outwardly through the globe. The portion passing through the globe and falling on the external reflector 9 is reflected therefrom in such a way as to give a generally spread light beam. The light distribution is such as to give a high efiiciency and a desirable spread. The construction is such that the fixture has ample strength to withstand the high pressures of internal explosions without breaking down or permitting flame, hot gases or sparks toescape and ignite the surrounding atmosphere.
Further modifications will be apparent to those skilled in the art and it is desired, therefore, thatv the invention be limited only by the prior art and the scope of the appended claim.
Having thus described my invention, what I claim and desire to secure by Letters Patent is:
An explosion-proof fixture comprising a hood construction, a cup-like glass globe, a cup-like guard embracing said cup-like globe, a lamp socket mounted in said hood construction for supporting a lamp bulb so that it extends into said globe, said hood construction being provided with an annular skirt member for supporting said cuplike globe and said cup-like guard, said guard 10 having an outwardly-extending annular bead, a reflector surrounding said guard and having an annular bead adjacentand below said guard bead, and a split channeled ring surrounding and emthe guard V PAUL D. PHILLIPS.
bracing both beads for holding the reflector on 15
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US1623A US2131117A (en) | 1935-01-14 | 1935-01-14 | Globe type explosionproof fixture |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US1623A US2131117A (en) | 1935-01-14 | 1935-01-14 | Globe type explosionproof fixture |
Publications (1)
Publication Number | Publication Date |
---|---|
US2131117A true US2131117A (en) | 1938-09-27 |
Family
ID=21697027
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US1623A Expired - Lifetime US2131117A (en) | 1935-01-14 | 1935-01-14 | Globe type explosionproof fixture |
Country Status (1)
Country | Link |
---|---|
US (1) | US2131117A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2530135A (en) * | 1948-05-07 | 1950-11-14 | Appleton Electric Co | Vented explosion-proof lighting fixture |
US2576510A (en) * | 1948-06-07 | 1951-11-27 | George Lee | Side light for motor vehicles |
US2595045A (en) * | 1940-03-20 | 1952-04-29 | Ncr Co | Calculating machine |
-
1935
- 1935-01-14 US US1623A patent/US2131117A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2595045A (en) * | 1940-03-20 | 1952-04-29 | Ncr Co | Calculating machine |
US2530135A (en) * | 1948-05-07 | 1950-11-14 | Appleton Electric Co | Vented explosion-proof lighting fixture |
US2576510A (en) * | 1948-06-07 | 1951-11-27 | George Lee | Side light for motor vehicles |
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