GB2164137A - Hyperbaric light - Google Patents
Hyperbaric light Download PDFInfo
- Publication number
- GB2164137A GB2164137A GB08515490A GB8515490A GB2164137A GB 2164137 A GB2164137 A GB 2164137A GB 08515490 A GB08515490 A GB 08515490A GB 8515490 A GB8515490 A GB 8515490A GB 2164137 A GB2164137 A GB 2164137A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dome
- collar
- annular portion
- light
- socket
- 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.)
- Granted
Links
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
- F21V31/00—Gas-tight or water-tight arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
- F21W2131/40—Lighting for industrial, commercial, recreational or military use
- F21W2131/411—Lighting for industrial, commercial, recreational or military use for inspection of the interior of hollow structures, e.g. vessels, tubes
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
Abstract
A hyperbaric light comprises a body (1) provided with an electrical connector (6), a socket (12) for receiving a light bulb (13), and a gas check valve (10); a pressure resistant glass dome (5) having a lower section which has a flared outer surface (15), which dome (5) sits over the socket (12); and fastening means for securing the dome (5) to the body (1) which means comprises (a) and annular portion (21) upstanding from the body (1) and defining a seating area around the socket (12) whereupon the base of the dome (5) rests, (b) a dome retaining collar (3) having an inner surface (23) which is of complementary shape to the flared outer surface (15) of the lower section of the dome (5) and an outer surface (33) of complementary shape to the inner surface of the annular portion (21) whereby wedging of the collar (3) between the dome (5) and the annular portion (21) is possible thereby retaining the dome in position, (c) an annular locking cap (2) having a threaded inner surface (22) for engaging a correspondingly threaded outer surface (41) of the annular portion (21) of the body (1) which cap (2) when engaged with the annular portion (21) bears down upon the collar (3) to secure the dome (5) to the body (1). <IMAGE>
Description
SPECIFICATION
Hyperbaric light
This invention relates to electric lights for use in vessels and fixed installations having chambers wherein the pressure can rise from atmospheric to a greatly increased pressure equivalent to that of the water pressure at the depths of present day underwater operations.
Thus the invention finds a use in diving decompression chambers, submersible exploration craft, underwater research stations and the like.
An ordinary unprotected light bulb could not withstand the increase in pressure to the depths reached as a matter of routine for example in oil and gas field exploratory and maintenance operations. Therefore it has been necessary to devise a pressure-resistant container for the bulb.
A known hyperbaric light comprises a body formed from a cylindrical metal block provided with a three-pin electrical connector, a socket for receiving a light bulb, and a gas check valve, a pressure resistant glass dome having a flared lower section which fits over the socket and is secured to the body by means of a metal collar provided with three equally spaced apertures on the circumference thereof through which fastening screws can be passed to engage complementary tapped bores in the body. A rubber collar is provided between the metal collar and the glass dome and a rubber O-ring is provided as a seal between the body and the seating area of the dome. A metal guard cage is also provided over the dome to protect it from accidental damage.This cage is attached to the body by means of large washers through which the collar fastening screws pass and which overlap a lower part of the cage to hold it in place upon the body.
A disadvantage of this light is that the substantially triangular fixing applies an uneven pressure to the dome through the collar unless great care is taken to ensure that the fastening screws are tightened equally.
The base of the dome often fractures as a result of such uneven pressure from the collar which of course causes an imperfect gas seal and allows the possibility of damage to the bulb. Changing the bulb is a tedious task because of the need to ensure even tightening of three screws. This light can be used at pressures of up to 600 psi (4.1 MPa).
An object of the present invention is to provide a more simple means of securing the dome to the body which enables quicker changing of a bulb and reduces the possibility of damage to the dome by applying a more even pressure thereto.
According to the present invention there is provided a hyperbaric light which comprises a body provided with an electrical connector, a socket for receiving a light bulb, and a gas check valve; a pressure resistant glass dome having a lower section which has a flared outer surface, which dome fits over the socket; and fastening means for securing the dome to the body which means comprises (a) an annular portion upstanding from the body and defining a seating area around the socket whereupon the base of the dome rests (b) a collar having an inner surface which is of complementary shape to the flared outer surface of the lower section of the dome and an outer surface of complementary shape to the inner surface of the annular portion whereby wedging of the collar between the dome and the annular portion is possible (c) an annular locking cap having a threaded surface for engaging a correspondingly threaded surface of the annular portion of the body which cap when engaged with the annular portion bears down upon the collar to secure the dome to the body.
Preferably the light includes a guard cage which has lug formations at the bottom thereof which formations are gripped between the locking cap and the body. Preferably an intervening portion of the collar is provided with recesses or grooves adapted to receive the lug formations to facilitate assembly of the light.
Advantageously an O-ring is also provided beneath the collar upon the flared outer surface of the dome to further improve sealing.
The invention will now be described by way of example with reference to the accompanying drawings in which;
Figure 1 is a side view of a light of this invention;
Figure 2 is an end view of the light shown in Fig. 1;
Figure 3 is a side view as in Fig. 1 which is partially in section to show interior detail.
In this embodiment of the invention a chamber light for use above a bunk in a decompression chamber for example comprises a body (1) provided with a three pin electrical connector (6), a socket (12) for receiving a bulb (13), and a gas check valve (10); a pressure resistant glass dome (5) having a lower section which has a flared outer surface (15), which dome fits over the socket (12); and fastening means for securing the dome (5) to the body (1) which means comprises (a) an annular portion (21) upstanding from the body (1) and defining a circular seating area (31) containing an O-ring (8) around the socket (12) whereupon the base (25) of the dome (5) rests, (b) a dome-retaining collar (3) having an inner surface (23) which is of complementary shape to the flared outer surface (15) of the lower section of the dome (5) and an outer surface (33) of complementary shape to the inner surface of the annular portion (21) whereby wedging of the collar (3) between the dome (5) and the annular portion (21) is possible thereby retaining the dome in position, (c) an annular locking cap (2) having a threaded inner surface (22) for engaging a correspondingly threaded outer surface (41) of the annular portion (21) of the body (1) which cap (2) when engaged with the annular portion (21) bears down upon the collar (3) to secure the dome (5) to the body (1). An O-ring (9) is located beneath the collar (3) to improve sealing.A guard cage (4) is provided with lug formations (14) which are received in recesses or grooves in the collar (3) and gripped beneath the cap (2) so that the cage (4) is held securely to the body (1).
An additional O-ring (7) is used as a seal between the electrical connector and the body (1).
Changing a bulb in this light is very simple requiring only that locking cap (2) is released by unscrewing by hand, which is very quick and easy in comparison with release of the three small screws of the prior art and requires no tool, removing the cage (4), opening the dome (5) to body (1) seal by a quick twisting/snapping action by holding the body (1) in one hand and the dome (5) in the other, renewing the failed bulb, replacing the dome (5) pressing home (lightly) the retaining collar (3) placing the cage (4) over the dome (5) with the lugs (14) aligned in the grooves of the collar (3), replacing the locking cap (2) and turning same to a tight fit.
It will be appreciated that the body (1) need not be cylindrical but could have flat side walls and that the electrical connector and gas check valve may be in alternative positions.
This design is also superior to the prior art described above in that use of the light may be made at pressures of 1000 psi (5.9MPa).
Claims (5)
1. A hyperbaric light which comprises a body provided with an electrical connector, a socket for receiving a light bulb, and a gas check valve; a pressure resistant glass dome having a lower section which has a flared outer surface, which dome fits over the socket; and fastening means for securing the dome to the body which means comprises (a) an annular portion upstanding from the body and defining a seating area around the socket whereupon the base of the dome rests (b) a collar having an inner surface which is of complementary shape to the flared outer surface of the lower section of the dome and an outer surface of complementary shape to the inner surface of the annular portion whereby wedging of the collar between the dome and the annular portion is possible (c) an annular locking cap having a threaded surface for engaging a correspondingly threaded surface of the annular portion of the body which cap when engaged with the annular portion bears down upon the collar to secure the dome to the body.
2. A light according to claim 1, further comprising a guard cage which has lug formations at the bottom thereof which formations are gripped between the locking cap and the body.
3. A light according to claim 2, wherein an intervening portion of the collar is provided with recesses or grooves adapted to receive the lug formations to facilitate assembly of the light.
4. A light according to any preceding claim, wherein an O-ring is provided beneath the collar upon the flared outer surface of the dome to improve sealing.
5. A hyperbaric light substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB848415873A GB8415873D0 (en) | 1984-06-21 | 1984-06-21 | Electric light |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8515490D0 GB8515490D0 (en) | 1985-07-24 |
| GB2164137A true GB2164137A (en) | 1986-03-12 |
| GB2164137B GB2164137B (en) | 1987-07-29 |
Family
ID=10562780
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB848415873A Pending GB8415873D0 (en) | 1984-06-21 | 1984-06-21 | Electric light |
| GB08515490A Expired GB2164137B (en) | 1984-06-21 | 1985-06-19 | Hyperbaric light |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB848415873A Pending GB8415873D0 (en) | 1984-06-21 | 1984-06-21 | Electric light |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB8415873D0 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4683523A (en) * | 1986-06-13 | 1987-07-28 | Olsson Mark S | Deep submersible light assembly |
| AT411791B (en) * | 1993-04-20 | 2004-05-25 | Stahl R Schaltgeraete Gmbh | LIGHT, IN PARTICULAR HEADLIGHT, WITH A BULB |
| FR2899955A1 (en) * | 2006-04-12 | 2007-10-19 | Osean Soc Par Actions Simplifi | Subaquatic illumination device for use in marine environment, has dome shaped metallic cage with arch placed around transparent glass shell for protecting against impacts, and including large surface that provides large angular opening |
| US7320530B2 (en) * | 1991-06-21 | 2008-01-22 | Mag Instrument, Inc. | Flashlight |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7201766B2 (en) | 2002-07-03 | 2007-04-10 | Life Support Technologies, Inc. | Methods and apparatus for light therapy |
| US8251057B2 (en) | 2003-06-30 | 2012-08-28 | Life Support Technologies, Inc. | Hyperbaric chamber control and/or monitoring system and methods for using the same |
| US7761945B2 (en) | 2004-05-28 | 2010-07-27 | Life Support Technologies, Inc. | Apparatus and methods for preventing pressure ulcers in bedfast patients |
-
1984
- 1984-06-21 GB GB848415873A patent/GB8415873D0/en active Pending
-
1985
- 1985-06-19 GB GB08515490A patent/GB2164137B/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4683523A (en) * | 1986-06-13 | 1987-07-28 | Olsson Mark S | Deep submersible light assembly |
| US7320530B2 (en) * | 1991-06-21 | 2008-01-22 | Mag Instrument, Inc. | Flashlight |
| US7641359B2 (en) | 1991-06-21 | 2010-01-05 | Mag Instrument, Inc. | Flashlight |
| AT411791B (en) * | 1993-04-20 | 2004-05-25 | Stahl R Schaltgeraete Gmbh | LIGHT, IN PARTICULAR HEADLIGHT, WITH A BULB |
| FR2899955A1 (en) * | 2006-04-12 | 2007-10-19 | Osean Soc Par Actions Simplifi | Subaquatic illumination device for use in marine environment, has dome shaped metallic cage with arch placed around transparent glass shell for protecting against impacts, and including large surface that provides large angular opening |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8415873D0 (en) | 1984-07-25 |
| GB2164137B (en) | 1987-07-29 |
| GB8515490D0 (en) | 1985-07-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |