CA1142633A - High intensity ballast assembly - Google Patents
High intensity ballast assemblyInfo
- Publication number
- CA1142633A CA1142633A CA000363185A CA363185A CA1142633A CA 1142633 A CA1142633 A CA 1142633A CA 000363185 A CA000363185 A CA 000363185A CA 363185 A CA363185 A CA 363185A CA 1142633 A CA1142633 A CA 1142633A
- Authority
- CA
- Canada
- Prior art keywords
- housing
- ballast
- housing member
- assembly
- housing assembly
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
Case 2748 HIGH INTENSITY BALLAST ASSEMBLY
ABSTRACT OF THE DISCLOSURE
This invention relates to a weatherproof ballast housing assembly for the containment of electrical ballast components associated with the operation of gaseous discharge lamps and especially those used in outdoor lighting applic-ations or indoor applications where wash down of the ballast housing and luminaire is involved. In the preferred embodiment the ballast housing assembly includes a first housing member having a radially offset flange portion, a second housing member having a rim portion, and a plate member overlaying the rim face of the first housing member and having a depending skirt portion which plate member is adapted for the mounting of a transformer and a capacitor on opposing surfaces thereof.
The radially offset flange portion co-acts with a predetermined length of the rim portion over a co-acting region to align in sandwiched relation therebetween the depending skirt portion.
Screws are provided across the co-acting region to secure the first housing member, the second housing member and the plate member in a mutually fixed, weatherproof relation. The instant ballast housing assembly provides for reduced manu-facturing costs, ease of maintenance and a degree of weather-proofing which in combination were not previously provided.
ABSTRACT OF THE DISCLOSURE
This invention relates to a weatherproof ballast housing assembly for the containment of electrical ballast components associated with the operation of gaseous discharge lamps and especially those used in outdoor lighting applic-ations or indoor applications where wash down of the ballast housing and luminaire is involved. In the preferred embodiment the ballast housing assembly includes a first housing member having a radially offset flange portion, a second housing member having a rim portion, and a plate member overlaying the rim face of the first housing member and having a depending skirt portion which plate member is adapted for the mounting of a transformer and a capacitor on opposing surfaces thereof.
The radially offset flange portion co-acts with a predetermined length of the rim portion over a co-acting region to align in sandwiched relation therebetween the depending skirt portion.
Screws are provided across the co-acting region to secure the first housing member, the second housing member and the plate member in a mutually fixed, weatherproof relation. The instant ballast housing assembly provides for reduced manu-facturing costs, ease of maintenance and a degree of weather-proofing which in combination were not previously provided.
Description
-1~ Case 2748 HIGH INTENSITY BALL~ST ASSEMBLY
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The present invention relates to a ballast housing assembly for use with gaseous discharge lamps, and partic-ularly it relates to a remote weatherproof ballast housing assembly.
It is well kno~n in the art o~ weatherproo~ ballast housin~ construction that the electrical components of the ballast circuit show improved reliability and longevity when protected from adverse en~ironmental effects.
One approach employed in the construction of weather-proof ballast housing has been to use a potting compound, such as an epoxy resin or asphalt~ to position an seal the com-ponents within the ballast housing. There are, however, multiple disadvan-tages which may arise through the use of potting compounds. For example, water has been kno~n to become trapped within the voids o~ hydroscopic potting compounds such as asphalt. O~er a period of time a corrosive solution may be produced through interaction o~ the water with the potting compound and where such a solution has access to the electrical components there exists the possibility of premature ballast circuit ~ailure. Another disadvantage which may be encountered when pott~ng compounds such as cured epoxy-sand blends are utilized, is the potential explosive hazard that ~rises ~hen the ballast circuit is operated at abnormally high temperatures that may occur during ballast failure. Under these conditions the epoxy compound breaks down, generatin~ methane gas which may subsequently ignite and, in the enclosed housing~ explode. Still another disadvantage associated with potting compounds is their - tendency to restrict capacitor expansion during a capacitor j ,.
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The present invention relates to a ballast housing assembly for use with gaseous discharge lamps, and partic-ularly it relates to a remote weatherproof ballast housing assembly.
It is well kno~n in the art o~ weatherproo~ ballast housin~ construction that the electrical components of the ballast circuit show improved reliability and longevity when protected from adverse en~ironmental effects.
One approach employed in the construction of weather-proof ballast housing has been to use a potting compound, such as an epoxy resin or asphalt~ to position an seal the com-ponents within the ballast housing. There are, however, multiple disadvan-tages which may arise through the use of potting compounds. For example, water has been kno~n to become trapped within the voids o~ hydroscopic potting compounds such as asphalt. O~er a period of time a corrosive solution may be produced through interaction o~ the water with the potting compound and where such a solution has access to the electrical components there exists the possibility of premature ballast circuit ~ailure. Another disadvantage which may be encountered when pott~ng compounds such as cured epoxy-sand blends are utilized, is the potential explosive hazard that ~rises ~hen the ballast circuit is operated at abnormally high temperatures that may occur during ballast failure. Under these conditions the epoxy compound breaks down, generatin~ methane gas which may subsequently ignite and, in the enclosed housing~ explode. Still another disadvantage associated with potting compounds is their - tendency to restrict capacitor expansion during a capacitor j ,.
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2~33 Case 2748 fail condition, thus precluding a timely capacitor shut down.
One prior art weatherproof ballast housing assembly which is not subject to the above mentioned disadvantages is disclosed in Canadian Patent No. 923,607 which issued on March 27, 1973 to Freegard et al. The Freegard patent dis-closes an unpotted weatherproof ballast housing assembly consisting of a single deep drawn or spun aluminum housing member supported on an elaborate structural base. The housing member itself performs no support function. A cast base is provided which acts both as a heat sink and a support member to provide the necessary strength in the ballast housing assembly. The need for such an elaborate base in the Freegard ballast housing remains a disadvantage in the cost of manu-facturing such a housing.
Canadian Patent No. 906,631 issued to Osteen et al on August 1, 1972, discloses an unpotted weatherproof ballast housing assembly having two compartments. The housing members of Osteen's assembly are complementary castings wherein one of the castings provides a ridge portion along its upper face which fits with a corresponding trough in the lower face of the other casting so as to affect a weatherproof seal along the abutting faces in the assembly. The housing members fu~-ther provide the structural support for the electrical components and for a luminaire which is designed to depend from the ballast housing. The structural requirements placed on the housing members give rise to a design from which heat cannot be readily dissipated and so, special consideration is given to the thermal isolation of the capacitor from the heat produced by both the transformer and the depending luminaire. An insulating multi-layered composite plate structure is provided to affect the thermal isolation of the capacitor. The plate is clamped between the abuting faces of the housing members and effectively divides the chamber into two compartments wherein the respective electronic components are located. The cast housing members and the plate structure contribute significantly to the increased cost of manufacturing the ballast housing .
~ , .
Case 2748 assembly.
It is therefore a feature of the present invention to provide a weatherproof ballast housing assembly which is ineXPensive to manufacture and easily maintained.
~riefly, the present invention pro~ides a weather-proof ballast hoUSing assembly suitable foruse with a gaseous discharge lamp. The ballast housing assembly comprises two housing members, one having an offset flange portion and the other having an open ended rim portion. The flange portion and the rim portion of the respective housing members co-act in conjunction with suitable securing means over a co-acting region to provide a weatherproof chamber. The co-acting housing members and the securing means further serve to secure in mutually fixed relation with the housing members a plate member of a sub-assembly. The sub-assembly further com-prises a transformer and a capacitor mounted on opposing surfaces of the Plate member. The plate member divides the chamber into two compar*ments in which respectively reside the transformer and the capacitor. The particular arrangements of the housing members and the sub-assembly in relation to the securing means is suchthat the ballast housing assembly is weatherproof; inexpensive to manufacture and easily main-tained.
Therefore, ir accordance with a broad aspect of the present invention there is provided a ballast housing assembly suitable for use with a gaseous discharge lamp. The ballast housing assembly comprises first and second housing members defining a chamber having an axis. The first housing member has an offset flange portion which comprises a flrst segment extending parallel to the chambers axis. A second segment of the offset flange portion serves to space the first segment from the first housing member. The second housing member has an open ended rim portion. The first segment of the flange portion of the first housing member co-acts with a predetermined length of the rim portion of the second housing member to align the rim portion and the first segment in mutually aligned relation, thereby defining a weatherproof Case 2748 seal over the co-acting regionO The housing member having the largest cross-sectional dimension as measured across the co-acting region is oriented uppermost along the axis of the final assembly. The plate member is a part of a sub-assembly which further comprises a transformer and a capacitor mounted on opposing surfaces of the plate member.
The plate member overlays the rim face of the lower housing member and divides the chamber into two compartments. Also included in the ballast housing assembly is removable securing means for securing the first and second housing members in mutually fixed relation with the plate member.
For a better understanding of the nature and features of the present invention, reference may be made to the diagrammatic representations of selected embodiments for lS the ballast housing assembly as depicted in the accompanying drawings.
Figure l is a partially cut away, three dimensional view of the preferred embodiment of the present invention.
Figure 2 is an enlarged view of a portion of the co-acting region of the ballast housing assembly shown in Figure l.
Figures 3, 4 and 5 are views of portions of the co-acting regions ~or various alternate embodiments of the ballast housing assembly of the present invention.
Referring now to Figures 1 and 2, the preferred embodiment of the present invention is shown as a remote, weatherproof ballast housing assembly which is suitable for use with a gaseous discharge lamp. The ballast housing assembly comprises an upper housing member 10 having an open ended cylindrical rim portion 12 and a lower housing member 14 having a radially offset flange portion 16. The flange portion 16 includes a radially planar segment 18 that extends inwardly towards the longitudinal axis 20 of the chamber 22. The flange portion 16 further includes a cylindrical segment 24 that extends upwardly away from the planar segment 18 to terminate in a circular rim face 26.
A sub-assembly 30 comprises a plate member 28 that overlays the Case 2748 circular rim face 26 of the lower housing member 14 so as to divide the chamber 22 into upper and lower compartments 44 and 46 respectively. The plate member 28 has a depen~ing skirt portion 32 which extends throughout a co-acting region 34 (see figure 2). The co-acting region 34 is defined as that region lying between and including the cylindrical rim portion 12 of the upper housing member 10 and the cylindrical segment 24 of the flange portion 16.
Suitable securing means such as screws 36 are disposed about the co-acting region 34 to secure the upper and lower housing members 10 and 14 respectively, in mutually fixed relation with the plate member 28. Also shown/ mounted on the opposing surfaces of the plate member 28 are a transformer 38, a capacitor 40 and an ignitor circuit 48, each of which form a part of the sub-assembly 30. It should be understood that the principal heat transfer path from transformer 38 is via radiation through the air space of upper compartment 44 to the upper housing member 10. Heat is dissipated from the upper housing member exterior surfaces through convection and radiation to the environment. Also, transformer 38 is shown located in the uppermost compartment 44 thereby further enhancing the dissipation of heat generated through trans~ormer operation. A similar heat transfer path is provided for heat generated by the capacitor 40 and the ignitor circuit 48 through the lower compartment 46 to the lower housing member 14. While plate member 28 may function to some degree as a heat sink for the components mounted thereon, the main thermodynamic function is to present a heat barrier between the transformer 38 and ~he capacitor 40/ignitor circuit 48. It will be understood that a wire path,appropriate to ballast circuit applications, will extend to the various electrical components and will communi-cate exteriorly of the ballast housing assembly as re~uired.
Figure 1 shows such a path 51 extending through the base of the lower housing member 14 by way of a strain relief devide 56. Clearly a similar path must also exist between the upper and lower compartments, 44 and 46 respectively.
Case 2748 Figure 1 shows such a path 52, in cross section. Open path 52 extends through plate member 28 and further includes a through plate member 28 and further includes a drip protrusion 53. The drip protrusion allows condensation produced within upper compartment 44 to drip to the floor of lower housing member 14, but prevents the droplets from migrating along the lower surface of plate member 28 and contacting the electrical components mounted thereon. It is no~ed that lead 54 is formed with a loop 55 as shown in Figure 1. This prevents condensation from travelling along the exterior of the wire and contacting the electrical components to which the wire is attached. Instead, the condensation gravitates to the lowest point of loop 55 and, when a large enough droplet is formed, falls to the floor of lower housing member 14. It will be understood that, while for the sake of clarity only one lead is shown, the number of leads in any particular ballast arrangement will be commensurate with the number of leads required for the operation of the ballast circuit. Drainage of the lower housing member 14 is provided through the floor of the lower housing member via a strain relief device 56.
Water is permitted to escape through gaps in and around the strain relief device. A mounting bracket 50 is provided ~or mounting the ballast housing assembly on a suitable support.
Referring now to Figure 3 there is shown a portion of the co-acting region for an alternate embodiment of the ballast housing assembly of the present invention. Figure 3 illustrates, inter alia, an upper housing member 310 having a radially offset flange portion 316, and a lower housing member 314 having an open ended cylindrical rim portion 312 which terminates in a circular rim face 326. The flange portion 316 includes a radially planar segment 318 w~ich extends outwardly from the longitudinal axis of the chamber.
The flan~e portion 316 further includes a cylindrical segment 324 which extends downwardly from the planar segment 318.
A plate member 328 o~erlays the circular rim face 326 of the lower housing member 314. The plate member 328 includes a depending skirt portion 332 which extends throughout a ~Z~33 Case 2748 a co-acting region 334. The co-acting region 334 is defined as that region lying between and including the rim portion 312 and the cylindrical segment 324. Securing means such as screws 36 are disposed about the co-acting region 334 to secure the upper and lower housing members, 310 and 314 respectively, in mutually fixed relation with plate member 328. The plate members described in connection with Figures 1, 2 and 3 all include a depending skirt portion.
The skirt portion in each case provides extra strength to the ballast housing assembly as a whole, increases the load bearing capacity of the plate member and improves the weatherproof seal throughout the co-acting region.
Referring now to Figure 4, there is shown a portion of the co-acting region for an alternate embodiment of the present invention. The~plate member of this embodiment does not include a depending skirt portion. Upper and lower housing members 410 and 414 respectiveIy, are identical to the coxresponding members described in relation to Figure 3. A
yasket 460 is disposed throughout the co-acting region 434 defined between and including rim portion 412 and cyl-indrical segment 424. Securing means such as screws 36 are disposed about the co-acting region 434 to secure the upper and lower housing memb-ers, 410 and 414 respectively, in mutually fixed relation with plate member 428. The arrangement of elements in this embodiment permit a further cost reduction in manufacturing although some structural strength is sacrificed. Accordingly, this arrangement is best suited for smaller ballast assemblies. The gasket material maintains the highly weatherproof seal character-istics of the ballast housing assemblies described in Figuresl, 2 and 3 .
Referring now to Figure 5, there is shown a portion of the co-acting region for an alternate embodiment wherein, again, the plate member does not include a depending skirt portion nor is there a yasket provided in the co-acting region. Upper and lower housing members~ 510 and 514 respectively, are similar to those described in relation l~Z~ci3~
Case 2748 to Figures 3 and 4. The embodiment of ballast housing assembly of Figure 5 is best suited to smaller ballast assemblies for use under climatic conditions which are somewhat less rigorous than those under which the preceding embodiments are best suited for use.
The foregoing has been a description of various embodiments of the present invention.
It should be understood, however, that the present invention is not necessarily restricted to a ballast housing assembly having a cylindrical configuration. For example, a ballast housing assembly having a rectangular shape may be alternately employed to reflect, through the teachings of the instant disclosure, the substance and advantages of the present invention~
Furthermore, any suitable drainage means may be a employed to drain the lower housing member.
It will also be understood that, while the instant disclosure deals with a weatherproof ballast housing assembly, a few minor alterations such as the exclusion of drain holes and the appropriate application of gasket materials or sealants will render the ballast housing assembly of the instant invention dust tight or water right, depending on the nature and extent of the alterations made thereto.
Further alternate embodiments will be readily apparent to a man skilled in the art in light of the instant disclosure. ~ccordingly, the present invention should only be limited to that which is claimed in the accompanying claims.
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One prior art weatherproof ballast housing assembly which is not subject to the above mentioned disadvantages is disclosed in Canadian Patent No. 923,607 which issued on March 27, 1973 to Freegard et al. The Freegard patent dis-closes an unpotted weatherproof ballast housing assembly consisting of a single deep drawn or spun aluminum housing member supported on an elaborate structural base. The housing member itself performs no support function. A cast base is provided which acts both as a heat sink and a support member to provide the necessary strength in the ballast housing assembly. The need for such an elaborate base in the Freegard ballast housing remains a disadvantage in the cost of manu-facturing such a housing.
Canadian Patent No. 906,631 issued to Osteen et al on August 1, 1972, discloses an unpotted weatherproof ballast housing assembly having two compartments. The housing members of Osteen's assembly are complementary castings wherein one of the castings provides a ridge portion along its upper face which fits with a corresponding trough in the lower face of the other casting so as to affect a weatherproof seal along the abutting faces in the assembly. The housing members fu~-ther provide the structural support for the electrical components and for a luminaire which is designed to depend from the ballast housing. The structural requirements placed on the housing members give rise to a design from which heat cannot be readily dissipated and so, special consideration is given to the thermal isolation of the capacitor from the heat produced by both the transformer and the depending luminaire. An insulating multi-layered composite plate structure is provided to affect the thermal isolation of the capacitor. The plate is clamped between the abuting faces of the housing members and effectively divides the chamber into two compartments wherein the respective electronic components are located. The cast housing members and the plate structure contribute significantly to the increased cost of manufacturing the ballast housing .
~ , .
Case 2748 assembly.
It is therefore a feature of the present invention to provide a weatherproof ballast housing assembly which is ineXPensive to manufacture and easily maintained.
~riefly, the present invention pro~ides a weather-proof ballast hoUSing assembly suitable foruse with a gaseous discharge lamp. The ballast housing assembly comprises two housing members, one having an offset flange portion and the other having an open ended rim portion. The flange portion and the rim portion of the respective housing members co-act in conjunction with suitable securing means over a co-acting region to provide a weatherproof chamber. The co-acting housing members and the securing means further serve to secure in mutually fixed relation with the housing members a plate member of a sub-assembly. The sub-assembly further com-prises a transformer and a capacitor mounted on opposing surfaces of the Plate member. The plate member divides the chamber into two compar*ments in which respectively reside the transformer and the capacitor. The particular arrangements of the housing members and the sub-assembly in relation to the securing means is suchthat the ballast housing assembly is weatherproof; inexpensive to manufacture and easily main-tained.
Therefore, ir accordance with a broad aspect of the present invention there is provided a ballast housing assembly suitable for use with a gaseous discharge lamp. The ballast housing assembly comprises first and second housing members defining a chamber having an axis. The first housing member has an offset flange portion which comprises a flrst segment extending parallel to the chambers axis. A second segment of the offset flange portion serves to space the first segment from the first housing member. The second housing member has an open ended rim portion. The first segment of the flange portion of the first housing member co-acts with a predetermined length of the rim portion of the second housing member to align the rim portion and the first segment in mutually aligned relation, thereby defining a weatherproof Case 2748 seal over the co-acting regionO The housing member having the largest cross-sectional dimension as measured across the co-acting region is oriented uppermost along the axis of the final assembly. The plate member is a part of a sub-assembly which further comprises a transformer and a capacitor mounted on opposing surfaces of the plate member.
The plate member overlays the rim face of the lower housing member and divides the chamber into two compartments. Also included in the ballast housing assembly is removable securing means for securing the first and second housing members in mutually fixed relation with the plate member.
For a better understanding of the nature and features of the present invention, reference may be made to the diagrammatic representations of selected embodiments for lS the ballast housing assembly as depicted in the accompanying drawings.
Figure l is a partially cut away, three dimensional view of the preferred embodiment of the present invention.
Figure 2 is an enlarged view of a portion of the co-acting region of the ballast housing assembly shown in Figure l.
Figures 3, 4 and 5 are views of portions of the co-acting regions ~or various alternate embodiments of the ballast housing assembly of the present invention.
Referring now to Figures 1 and 2, the preferred embodiment of the present invention is shown as a remote, weatherproof ballast housing assembly which is suitable for use with a gaseous discharge lamp. The ballast housing assembly comprises an upper housing member 10 having an open ended cylindrical rim portion 12 and a lower housing member 14 having a radially offset flange portion 16. The flange portion 16 includes a radially planar segment 18 that extends inwardly towards the longitudinal axis 20 of the chamber 22. The flange portion 16 further includes a cylindrical segment 24 that extends upwardly away from the planar segment 18 to terminate in a circular rim face 26.
A sub-assembly 30 comprises a plate member 28 that overlays the Case 2748 circular rim face 26 of the lower housing member 14 so as to divide the chamber 22 into upper and lower compartments 44 and 46 respectively. The plate member 28 has a depen~ing skirt portion 32 which extends throughout a co-acting region 34 (see figure 2). The co-acting region 34 is defined as that region lying between and including the cylindrical rim portion 12 of the upper housing member 10 and the cylindrical segment 24 of the flange portion 16.
Suitable securing means such as screws 36 are disposed about the co-acting region 34 to secure the upper and lower housing members 10 and 14 respectively, in mutually fixed relation with the plate member 28. Also shown/ mounted on the opposing surfaces of the plate member 28 are a transformer 38, a capacitor 40 and an ignitor circuit 48, each of which form a part of the sub-assembly 30. It should be understood that the principal heat transfer path from transformer 38 is via radiation through the air space of upper compartment 44 to the upper housing member 10. Heat is dissipated from the upper housing member exterior surfaces through convection and radiation to the environment. Also, transformer 38 is shown located in the uppermost compartment 44 thereby further enhancing the dissipation of heat generated through trans~ormer operation. A similar heat transfer path is provided for heat generated by the capacitor 40 and the ignitor circuit 48 through the lower compartment 46 to the lower housing member 14. While plate member 28 may function to some degree as a heat sink for the components mounted thereon, the main thermodynamic function is to present a heat barrier between the transformer 38 and ~he capacitor 40/ignitor circuit 48. It will be understood that a wire path,appropriate to ballast circuit applications, will extend to the various electrical components and will communi-cate exteriorly of the ballast housing assembly as re~uired.
Figure 1 shows such a path 51 extending through the base of the lower housing member 14 by way of a strain relief devide 56. Clearly a similar path must also exist between the upper and lower compartments, 44 and 46 respectively.
Case 2748 Figure 1 shows such a path 52, in cross section. Open path 52 extends through plate member 28 and further includes a through plate member 28 and further includes a drip protrusion 53. The drip protrusion allows condensation produced within upper compartment 44 to drip to the floor of lower housing member 14, but prevents the droplets from migrating along the lower surface of plate member 28 and contacting the electrical components mounted thereon. It is no~ed that lead 54 is formed with a loop 55 as shown in Figure 1. This prevents condensation from travelling along the exterior of the wire and contacting the electrical components to which the wire is attached. Instead, the condensation gravitates to the lowest point of loop 55 and, when a large enough droplet is formed, falls to the floor of lower housing member 14. It will be understood that, while for the sake of clarity only one lead is shown, the number of leads in any particular ballast arrangement will be commensurate with the number of leads required for the operation of the ballast circuit. Drainage of the lower housing member 14 is provided through the floor of the lower housing member via a strain relief device 56.
Water is permitted to escape through gaps in and around the strain relief device. A mounting bracket 50 is provided ~or mounting the ballast housing assembly on a suitable support.
Referring now to Figure 3 there is shown a portion of the co-acting region for an alternate embodiment of the ballast housing assembly of the present invention. Figure 3 illustrates, inter alia, an upper housing member 310 having a radially offset flange portion 316, and a lower housing member 314 having an open ended cylindrical rim portion 312 which terminates in a circular rim face 326. The flange portion 316 includes a radially planar segment 318 w~ich extends outwardly from the longitudinal axis of the chamber.
The flan~e portion 316 further includes a cylindrical segment 324 which extends downwardly from the planar segment 318.
A plate member 328 o~erlays the circular rim face 326 of the lower housing member 314. The plate member 328 includes a depending skirt portion 332 which extends throughout a ~Z~33 Case 2748 a co-acting region 334. The co-acting region 334 is defined as that region lying between and including the rim portion 312 and the cylindrical segment 324. Securing means such as screws 36 are disposed about the co-acting region 334 to secure the upper and lower housing members, 310 and 314 respectively, in mutually fixed relation with plate member 328. The plate members described in connection with Figures 1, 2 and 3 all include a depending skirt portion.
The skirt portion in each case provides extra strength to the ballast housing assembly as a whole, increases the load bearing capacity of the plate member and improves the weatherproof seal throughout the co-acting region.
Referring now to Figure 4, there is shown a portion of the co-acting region for an alternate embodiment of the present invention. The~plate member of this embodiment does not include a depending skirt portion. Upper and lower housing members 410 and 414 respectiveIy, are identical to the coxresponding members described in relation to Figure 3. A
yasket 460 is disposed throughout the co-acting region 434 defined between and including rim portion 412 and cyl-indrical segment 424. Securing means such as screws 36 are disposed about the co-acting region 434 to secure the upper and lower housing memb-ers, 410 and 414 respectively, in mutually fixed relation with plate member 428. The arrangement of elements in this embodiment permit a further cost reduction in manufacturing although some structural strength is sacrificed. Accordingly, this arrangement is best suited for smaller ballast assemblies. The gasket material maintains the highly weatherproof seal character-istics of the ballast housing assemblies described in Figuresl, 2 and 3 .
Referring now to Figure 5, there is shown a portion of the co-acting region for an alternate embodiment wherein, again, the plate member does not include a depending skirt portion nor is there a yasket provided in the co-acting region. Upper and lower housing members~ 510 and 514 respectively, are similar to those described in relation l~Z~ci3~
Case 2748 to Figures 3 and 4. The embodiment of ballast housing assembly of Figure 5 is best suited to smaller ballast assemblies for use under climatic conditions which are somewhat less rigorous than those under which the preceding embodiments are best suited for use.
The foregoing has been a description of various embodiments of the present invention.
It should be understood, however, that the present invention is not necessarily restricted to a ballast housing assembly having a cylindrical configuration. For example, a ballast housing assembly having a rectangular shape may be alternately employed to reflect, through the teachings of the instant disclosure, the substance and advantages of the present invention~
Furthermore, any suitable drainage means may be a employed to drain the lower housing member.
It will also be understood that, while the instant disclosure deals with a weatherproof ballast housing assembly, a few minor alterations such as the exclusion of drain holes and the appropriate application of gasket materials or sealants will render the ballast housing assembly of the instant invention dust tight or water right, depending on the nature and extent of the alterations made thereto.
Further alternate embodiments will be readily apparent to a man skilled in the art in light of the instant disclosure. ~ccordingly, the present invention should only be limited to that which is claimed in the accompanying claims.
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Claims (10)
1. A ballast housing assembly suitable for use with a gaseous discharge lamp, said ballast housing assembly comprising:
a first housing member and a second housing member defining a chamber having an axis, said first housing member having an offset flange portion, said flange portion comprising a first segment extending parallel to said axis and spaced from the first housing member by a second segment extending substantially perpendicular to said first segment, said second housing member terminating in an open ended rim portion;
said first segment co-acting with a predetermined length of said rim portion to substantially align the pre-determined length of said rim portion and said first segment in a mutually aligned relation defining a weatherproof co-acting region;
one of said first and second housing members having a cross-sectional dimension measured across said co-acting region that is larger than the cross-sectional dimension of the other of said housing members measured across said co-acting region, the one housing member being oriented uppermost along said axis and theother housing member having a rim face;
a sub-assembly comprising a plate member overlaying said rim face and dividing said chamber into first and second compartments, said subassembly further comprising a trans-former and a capacitor mounted on opposing surfaces of said plate member;
said ballast housing assembly further including removable securing means for securing at said co-acting region said first housing member and said second housing member in mutually fixed relation with said plate member.
a first housing member and a second housing member defining a chamber having an axis, said first housing member having an offset flange portion, said flange portion comprising a first segment extending parallel to said axis and spaced from the first housing member by a second segment extending substantially perpendicular to said first segment, said second housing member terminating in an open ended rim portion;
said first segment co-acting with a predetermined length of said rim portion to substantially align the pre-determined length of said rim portion and said first segment in a mutually aligned relation defining a weatherproof co-acting region;
one of said first and second housing members having a cross-sectional dimension measured across said co-acting region that is larger than the cross-sectional dimension of the other of said housing members measured across said co-acting region, the one housing member being oriented uppermost along said axis and theother housing member having a rim face;
a sub-assembly comprising a plate member overlaying said rim face and dividing said chamber into first and second compartments, said subassembly further comprising a trans-former and a capacitor mounted on opposing surfaces of said plate member;
said ballast housing assembly further including removable securing means for securing at said co-acting region said first housing member and said second housing member in mutually fixed relation with said plate member.
2. A weatherproof ballast housing assembly suitable for use with a gaseous discharge lamp said ballast housing assembly comprising:
Case 2748 a first housing member and a second housing member defining a chamber having a longitudinal axis, said first housing member having a radially offset flange portion,said flange portion comprising a cylindrical segment co-axial with said longitudinal axis and spaced from the first housing member by a radialy planar segment, said second housing member terminating in an open ended cylindrical rim portion;
said cylindrical segment co-acting with a predetermined length of said rim portion to substantially align the predetermined length of said rim portion and said cylindrical segment in a mutually aligned relation defining a weatherproof co-acting region;
one of said first and second housing members having a diameter measured across said co-acting region that is larger than the diameter of the other of said housing members measured across said co-acting region, the one housing member being oriented uppermost along said longitudinal axis and the other housing member having a circular rim face;
a sub-assembly comprising a plate member overlaying said rim face and dividing said chamber into first and second compartments, said sub-assembly further comprising a transformer and a capacitor mounted on opposing surfaces of said plate member;
said ballast housing assembly further including removable securing means for securing at said co-acting region said first housing member and said second housing member in mutually fixed relation with said plate member.
Case 2748 a first housing member and a second housing member defining a chamber having a longitudinal axis, said first housing member having a radially offset flange portion,said flange portion comprising a cylindrical segment co-axial with said longitudinal axis and spaced from the first housing member by a radialy planar segment, said second housing member terminating in an open ended cylindrical rim portion;
said cylindrical segment co-acting with a predetermined length of said rim portion to substantially align the predetermined length of said rim portion and said cylindrical segment in a mutually aligned relation defining a weatherproof co-acting region;
one of said first and second housing members having a diameter measured across said co-acting region that is larger than the diameter of the other of said housing members measured across said co-acting region, the one housing member being oriented uppermost along said longitudinal axis and the other housing member having a circular rim face;
a sub-assembly comprising a plate member overlaying said rim face and dividing said chamber into first and second compartments, said sub-assembly further comprising a transformer and a capacitor mounted on opposing surfaces of said plate member;
said ballast housing assembly further including removable securing means for securing at said co-acting region said first housing member and said second housing member in mutually fixed relation with said plate member.
3. The ballast housing assembly of Claim 2 wherein said radially planar segment extends inwardly toward said longitudinal axis, and said plate further includes a downwardly depending skirt portion extending throughout said co-acting region between said cylindrical segment and said rim portion.
4. The ballast housing assembly of claim 2 wherein said radially planar segment extends outwardly from said longitudinal axis.
5. The ballast housing assembly of Claim 4 wherein Case 2748 a gasket is disposed generally throughout said co-acting region between said cylindrical segment and said rim portion.
6. The ballast housing assembly of Claim 4 wherein said plate further includes a downwardly depending skirt portion extending generally throughout said co-acting region between said cylindrical segment and said rim portion.
7. The ballast housing assembly of Claims3 and 4 wherein the said other of said housing members also includes drainage means.
8. The ballast housing assembly of Claims 3 and 4 wherein there is also included bracket means for securings said housing assembly to a supporting standard.
9, The ballast housing assembly of Claims 3 and 4 wherein said sub-assembly further includes an igniter circuit mounted along with said capacitor on said plate member.
10. The ballast housing assembly of Claims 3 and 6 wherein said securing means fastens said first housing member, said second housing member and said depending skirt portion in mutually fixed relation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000363185A CA1142633A (en) | 1980-10-24 | 1980-10-24 | High intensity ballast assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000363185A CA1142633A (en) | 1980-10-24 | 1980-10-24 | High intensity ballast assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1142633A true CA1142633A (en) | 1983-03-08 |
Family
ID=4118252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000363185A Expired CA1142633A (en) | 1980-10-24 | 1980-10-24 | High intensity ballast assembly |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1142633A (en) |
-
1980
- 1980-10-24 CA CA000363185A patent/CA1142633A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |