US3848714A - Low electrical leakage support - Google Patents

Low electrical leakage support Download PDF

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Publication number
US3848714A
US3848714A US00318556A US31855672A US3848714A US 3848714 A US3848714 A US 3848714A US 00318556 A US00318556 A US 00318556A US 31855672 A US31855672 A US 31855672A US 3848714 A US3848714 A US 3848714A
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Prior art keywords
trolley
track
carriage
supported
web
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US00318556A
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P Claxton
T Keenan
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American Sterilizer Co
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American Sterilizer Co
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Priority to US00318556A priority Critical patent/US3848714A/en
Priority to CA179,930A priority patent/CA987753A/en
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Assigned to MORGAN GUARANTY TRUST COMPANY reassignment MORGAN GUARANTY TRUST COMPANY SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AMERICAN STERILIZER COMPANY, A PA CORP.
Assigned to AMERICAN STERILIZER COMPANY reassignment AMERICAN STERILIZER COMPANY RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: MORGAN GUARANTY TRUST COMPANY OF NEW YORK
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R25/00—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits
    • H01R25/14—Rails or bus-bars constructed so that the counterparts can be connected thereto at any point along their length
    • 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
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/34—Supporting elements displaceable along a guiding element
    • F21V21/35—Supporting elements displaceable along a guiding element with direct electrical contact between the supporting element and electric conductors running along the guiding element

Definitions

  • ABSTRACT A support for an electrical appliance is disclosed, which provides low electrical current leakage to ground.
  • the support is made up of a metal track generally U-shaped in cross section, facing downward and suitable to be attached to a ceiling.
  • the metal track has a small trolley track U-shaped in cross section also facing down and made of a polymer material supported inside the main track.
  • a fixture carriage operates in the carriage track and an electrical trolley car-- rying electrical brushes operates in the trolley track.
  • the trolley has spaced bus bars which make sliding contact with brushes on the trolley.
  • the trolley itself is made of a dielectric material except for the brushes, springs and terminals.
  • the trolley track is likewise made of a dielectric material, which produces a low current leakage from the electrical circuit to ground.
  • Another object of the invention is to provide a fixture with a minimum current leakage fixture support which is simple in construction, economical to manufacture, and simple and efficient to use.
  • Another object of the invention is to provide an improved fixture support.
  • FIG. 1 is a side view of the fixture support according to the invention.
  • FIG. 2 is an exploded view partly in cross section of the fixture support shown in FIG. 1.
  • FIG. 3 is a top view partly in cross section of the trolley.
  • FIG. 4 is a side view of the trolley.
  • FIG. 5 is an end view partly in cross section of the trolley.
  • FIG. 6 is a longitudinal cross sectional view of the trolley track.
  • FIG. 7 is a side view of the tracks.
  • the device according to the invention is made up mainly of the main track 10, the trolley track 11, the trolley 13, and the carriage 12 which supports the electrical device which is in the example shown, the lamp 14.
  • the main track 10 and the trolley track 11 are both made in the form of channels opening downwardly.
  • the trolley track 11, however, is much smaller in cross section than the main track 10 and the trolley track 11 is made of a dielectric material having bus bars supported in it to make contact with the brushes on the trolley to transmit electricity to the carriage l2 and thence to the lamp 14.
  • the trolley itself is made of dielectric material, such as a molded polymer for example. Since the trolley track 11 and the trolley 13 are made of molded polymer, a minimum electrical leakage results from the electrical lines and bus bars to the carriage l2 and thence to the external parts of the lamp l4 and track 10.
  • the main track 10 may be made of a metal and it could be extruded from a suitable metallic material and supported on the ceiling of a room, as indicated in FIG. 1.
  • the main track has spaced flanges 34 and 35 which have inwardly directed legs 30 and 31 fixed to their lower ends and beads 36 and 37, which form tracks for the wheels 28 of the carriage.
  • the trolley track 11 is generally in the same form as the main track 10 but is much smaller.
  • the trolley track 11 is made of a dielectric material and has flanges 32 and 33 fixed to the intermediate web 43.
  • the bus bars 22 and 23 are set in recesses under beads 25 and 26 and 27 and 28 respectively on the inner side of the flanges 32 and 33.
  • a bus bar 24 is supported on the inner surface of the web 43 of the trolley track.
  • the inwardly directed ends 40 and 41 of the trolley track underlie the trolley 13 and prevent the brushes l8, 19, 55 and 56 from separating from the bus bars 22, 23 and 43.
  • the trolley 13 is made of two L-shaped angle sections 16 and 17 which are held together by bolts 29.
  • the angle sections are molded, or otherwise formed, from a dielectric material such as a polymer.
  • the angle sections 16 and 17 have pockets 41 and 42 integrally formed thereon and these pockets receive the springs 20 and 21.
  • the springs 20 and 21 are U-shaped leaf springs that have their inner end resting on the inner surface of the opposite angle section and the inner ends of the U-shaped springs are electrically connected to the electrical terminals 45 and 46. Springs 55 and 56 are connected to terminals 44 and 47.
  • Bus bars 22 and 23 are connected to a source of electricity by lines 69 and 70.
  • the electrical terminals 45 and 46 are in turn connected to the lines 65 and 66 in the carriage 12 and conduct electricity to the lamp 14 from the bus bars 22 and 23 through the trolley.
  • the outer ends of the springs 20 and 21 have the brushes 19 and 18 respectively fixed to them and the brushes 18 and 19 extend outwardly through openings in the pockets 41 and 42 and are urged outwardly into sliding engagement with the bus bars 22 and 23.
  • Springs 55 and 56 act as brushes and are fixed to the upper edge of the trolley sections 16 and 17 and are electrically connected to bus bar 24. Springs or brushes 55 and 56 form sliding engagement with the bus bar 24. Springs or brushes 55 and 56 are connected to terminals 44 and 47, which will in turn be connected to the carriage 12.
  • a ground circuit is formed from bus bar 24, brushes 55, terminals 44 and 47 to lines 67 and 68.
  • the main track 10 When the device shown herein is assembled, the main track 10 will be fixed to a ceiling, as shown in FIG. 1, and the trolley track 11 will have its web fixed to the web of the main track 10 so that the trolley track is in relation with the main track as shown in FIG. 2, with the flanges of the trolley track spaced inwardly from the flanges of the main track so that the wheels 28 of the carriage can operate below the trolley track.
  • the trolley 13 will be fixed to the carriage by means of the terminals 44, 45, 46 and 47 so that the trolley moves along coextensively with the carriage.
  • the brushes 18, 19, 55 and 56 will engage the bus bars 22, 23, and 24 and thereby conduct electricity from the lines 50 and 51 to the fixture 14 through the carriage.
  • a support for an electrical system comprising a main first channel track having means including a first web and spaced downwardly extending first and second flanges attached to said first web,
  • second channel means supporting bus bars on said main track
  • said second channel means having a second web, a
  • said second channel means comprising dielectric means between said bus bars and said main track whereby a low electrical leakage results between said bus bars and said track.
  • a support for an electrical device having a carriage and a trolley supported on said carriage
  • said support comprising a main track having a web adapted to be attached to a ceiling
  • first flange and a second flange fixed to said web and extending downwardly therefrom in spaced relation to each other
  • a trolley track having a web disposed generally parallel to said main track web and supported thereon,
  • first bus bar and a second bus bar made of electrical conductive material and fixed to said third flange and to said fourth flange respectively
  • said trolley track being made of a dielectric material.
  • said trolley track and said third flange and said fourth flange are made integral with each other whereby a low electrical leakage results from said trolley to said main track.
  • a support for an electrical appliance providing minimum leakage of electricity from an electrical fixture comprising a carriage track in the form of an inverted channel adapted to be supported on a ceiling,
  • a trolley track in the form of an inverted channel smaller in cross section than said carriage track and received in said carriage track and supported therein,
  • said trolley track being made of a dielectric material
  • electrical bus bar means fixed in said trolley track and adapted to slidably engage brush means supported on a carriage for slidably engaging said contact means whereby electricity is transferred from a source of electricity to said contact means and to said fixture supported on said carriage.
  • said trolley being slidably received in said trolley track
  • said trolley being made of a dielectric material with said brush means supported thereon.
  • said contact means comprises bus bars fixed to the inside of said trolley track and extending along the inside edges of said downwardly facing channel.
  • said brush means being supported on said spring members and urged into contact with said bus bar members by said spring.
  • a support for an electrical device comprising a main track U-shaped in cross section
  • said trolley track being substantially smaller in cross section than said main track and disposed in said main track
  • said trolley track having a web with two spaced flanges fixed to said web
  • said main track having a web with two spaced flanges fixed to said web
  • trolley track web resting on said main track web and said trolley track flanges being spaced inwardly from and generally parallel to said main track flanges
  • said trolley track being made of a dielectric material
  • bus bar means fixed to the inside surface of said trolley track flanges
  • bus bar means being adapted to be connected to a source of electricity

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)

Abstract

A support for an electrical appliance is disclosed, which provides low electrical current leakage to ground. The support is made up of a metal track generally U-shaped in cross section, facing downward and suitable to be attached to a ceiling. The metal track has a small trolley track U-shaped in cross section also facing down and made of a polymer material supported inside the main track. A fixture carriage operates in the carriage track and an electrical trolley carrying electrical brushes operates in the trolley track. The trolley has spaced bus bars which make sliding contact with brushes on the trolley. The trolley itself is made of a dielectric material except for the brushes, springs and terminals. The trolley track is likewise made of a dielectric material, which produces a low current leakage from the electrical circuit to ground.

Description

United States Patent Claxton et al.
[ Nov. 19, 1974 LOW ELECTRICAL LEAKAGE SUPPORT Inventors: Patrick H. Claxton, Brampton,
Ontario, Canada; Thomas A. Keenan, Erie, Pa.
Assignee: American Sterilizer Company, Erie,
Filed: Dec. 26, 1972 Appl. No.: 318,556
US. Cl. 191/33, 191/29 K, 191/22 R Int. Cl B60n l/04 Field of Search 191/22 R, 23, 28, 29 R,
References Cited UNITED STATES PATENTS 8/1967 Martin l9l/23 R 10/1967 Kilburg 7/1968 Hillmann... 11/1973 Ross ..191/23R Primary Examiner-M. Henson Wood. .lr. Assistant ExaminerD. W. Keen [5 7] ABSTRACT A support for an electrical appliance is disclosed, which provides low electrical current leakage to ground. The support is made up of a metal track generally U-shaped in cross section, facing downward and suitable to be attached to a ceiling. The metal track has a small trolley track U-shaped in cross section also facing down and made of a polymer material supported inside the main track. A fixture carriage operates in the carriage track and an electrical trolley car-- rying electrical brushes operates in the trolley track. The trolley has spaced bus bars which make sliding contact with brushes on the trolley. The trolley itself is made of a dielectric material except for the brushes, springs and terminals. The trolley track is likewise made of a dielectric material, which produces a low current leakage from the electrical circuit to ground.
13 Claims, 7 Drawing Figures PATENTEL HUV 1 9 I974 SHEET 10F 2 g i N LOW ELECTRICAL LEAKAGE SUPPORT OBJECTS OF THE INVENTION It is an object of the invention to provide a support arrangement for an electrical device such as a surgical lamp wherein minimum electrical current leakage results to the ground.
Another object of the invention is to provide a fixture with a minimum current leakage fixture support which is simple in construction, economical to manufacture, and simple and efficient to use.
Another object of the invention is to provide an improved fixture support.
With the above and other objects in view, the present invention consists of the combination and arrangement of parts hereinafter more fully described, illustrated in the accompanying drawing and more particularly pointed out in the appended claims, it being understood that changes may be made in the form, size, proportions, and minor details of construction without departing from the spirit or sacrificing any of the advantages of the invention.
GENERAL DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of the fixture support according to the invention.
FIG. 2 is an exploded view partly in cross section of the fixture support shown in FIG. 1.
FIG. 3 is a top view partly in cross section of the trolley.
FIG. 4 is a side view of the trolley.
FIG. 5 is an end view partly in cross section of the trolley.
FIG. 6 is a longitudinal cross sectional view of the trolley track.
FIG. 7 is a side view of the tracks.
DETAILED DESCRIPTION OF THE DRAWINGS Now with more particular reference to the drawings, the device according to the invention is made up mainly of the main track 10, the trolley track 11, the trolley 13, and the carriage 12 which supports the electrical device which is in the example shown, the lamp 14.
The main track 10 and the trolley track 11 are both made in the form of channels opening downwardly. The trolley track 11, however, is much smaller in cross section than the main track 10 and the trolley track 11 is made of a dielectric material having bus bars supported in it to make contact with the brushes on the trolley to transmit electricity to the carriage l2 and thence to the lamp 14. The trolley itself is made of dielectric material, such as a molded polymer for example. Since the trolley track 11 and the trolley 13 are made of molded polymer, a minimum electrical leakage results from the electrical lines and bus bars to the carriage l2 and thence to the external parts of the lamp l4 and track 10.
The main track 10 may be made of a metal and it could be extruded from a suitable metallic material and supported on the ceiling of a room, as indicated in FIG. 1. The main track has spaced flanges 34 and 35 which have inwardly directed legs 30 and 31 fixed to their lower ends and beads 36 and 37, which form tracks for the wheels 28 of the carriage.
The trolley track 11 is generally in the same form as the main track 10 but is much smaller. The trolley track 11 is made of a dielectric material and has flanges 32 and 33 fixed to the intermediate web 43. The bus bars 22 and 23 are set in recesses under beads 25 and 26 and 27 and 28 respectively on the inner side of the flanges 32 and 33. A bus bar 24 is supported on the inner surface of the web 43 of the trolley track. The inwardly directed ends 40 and 41 of the trolley track underlie the trolley 13 and prevent the brushes l8, 19, 55 and 56 from separating from the bus bars 22, 23 and 43.
The trolley 13 is made of two L- shaped angle sections 16 and 17 which are held together by bolts 29. The angle sections are molded, or otherwise formed, from a dielectric material such as a polymer. The angle sections 16 and 17 have pockets 41 and 42 integrally formed thereon and these pockets receive the springs 20 and 21. The springs 20 and 21 are U-shaped leaf springs that have their inner end resting on the inner surface of the opposite angle section and the inner ends of the U-shaped springs are electrically connected to the electrical terminals 45 and 46. Springs 55 and 56 are connected to terminals 44 and 47. Bus bars 22 and 23 are connected to a source of electricity by lines 69 and 70. The electrical terminals 45 and 46 are in turn connected to the lines 65 and 66 in the carriage 12 and conduct electricity to the lamp 14 from the bus bars 22 and 23 through the trolley. The outer ends of the springs 20 and 21 have the brushes 19 and 18 respectively fixed to them and the brushes 18 and 19 extend outwardly through openings in the pockets 41 and 42 and are urged outwardly into sliding engagement with the bus bars 22 and 23. Springs 55 and 56 act as brushes and are fixed to the upper edge of the trolley sections 16 and 17 and are electrically connected to bus bar 24. Springs or brushes 55 and 56 form sliding engagement with the bus bar 24. Springs or brushes 55 and 56 are connected to terminals 44 and 47, which will in turn be connected to the carriage 12. A ground circuit is formed from bus bar 24, brushes 55, terminals 44 and 47 to lines 67 and 68.
When the device shown herein is assembled, the main track 10 will be fixed to a ceiling, as shown in FIG. 1, and the trolley track 11 will have its web fixed to the web of the main track 10 so that the trolley track is in relation with the main track as shown in FIG. 2, with the flanges of the trolley track spaced inwardly from the flanges of the main track so that the wheels 28 of the carriage can operate below the trolley track. The trolley 13 will be fixed to the carriage by means of the terminals 44, 45, 46 and 47 so that the trolley moves along coextensively with the carriage. The brushes 18, 19, 55 and 56 will engage the bus bars 22, 23, and 24 and thereby conduct electricity from the lines 50 and 51 to the fixture 14 through the carriage.
The foregoing specification sets forth the invention in its preferred practical forms but the structure shown is capable of modification within a range of equivalents without departing from the invention which is to be understood is broadly novel as is commensurate with the appended claims.
The embodiments of the invention in which an exclusive property of privilege is claimed are defined as follows:
1. A support for an electrical system comprising a main first channel track having means including a first web and spaced downwardly extending first and second flanges attached to said first web,
second channel means supporting bus bars on said main track,
said second channel means having a second web, a
third flange and a fourth flange,
a first bus bar supported on said second web and a second bus bar supported on said third flange and a third bus bar supported on said fourth flange,
means for connecting said bus bars to a source of electricity,
said second channel means comprising dielectric means between said bus bars and said main track whereby a low electrical leakage results between said bus bars and said track.
2. The support recited in claim 1 wherein a carriage is supported on a carriage track means,
and trolley means attached to said carriage,
brush means on said trolley means making electrical contact with said bus bars whereby electrical means supported on said carriage is connected to said electrical means connected to said bus bars.
3. The support recited in claim 2 wherein said trolley is made of dielectric material.
4. A support for an electrical device having a carriage and a trolley supported on said carriage,
said support comprising a main track having a web adapted to be attached to a ceiling,
a first flange and a second flange fixed to said web and extending downwardly therefrom in spaced relation to each other,
means on said first flange and on said second flange for supporting wheels attached to said carriage,
a fixture supported on said carriage,
a trolley track having a web disposed generally parallel to said main track web and supported thereon,
a third flange and a fourth flange spaced from each other and fixed to said trolley track web extending downwardly therefrom,
a first bus bar and a second bus bar made of electrical conductive material and fixed to said third flange and to said fourth flange respectively,
.said trolley track being made of a dielectric material.
5. The support recited in claim 4 wherein said trolleyv track is made of a molded thermoplastic material,
said trolley track and said third flange and said fourth flange are made integral with each other whereby a low electrical leakage results from said trolley to said main track.
6. A support for an electrical appliance providing minimum leakage of electricity from an electrical fixture comprising a carriage track in the form of an inverted channel adapted to be supported on a ceiling,
carriage supporting means for supporting a fixture carrying carriage on said track for movement thereon,
a trolley track in the form of an inverted channel smaller in cross section than said carriage track and received in said carriage track and supported therein,
said trolley track being supported above said carriage supporting means,
said trolley track being made of a dielectric material,
electrical bus bar means fixed in said trolley track and adapted to slidably engage brush means supported on a carriage for slidably engaging said contact means whereby electricity is transferred from a source of electricity to said contact means and to said fixture supported on said carriage.
7. The support recited in claim 6 wherein a carriage is supported on said carriage track,
and said brush means is supported on its trolley,
said trolley being slidably received in said trolley track,
said trolley being made of a dielectric material with said brush means supported thereon.
8. The support recited in claim 7 wherein said contact means comprises bus bars fixed to the inside of said trolley track and extending along the inside edges of said downwardly facing channel.
9. The support recited in claim 6 wherein said trolley comprises a member T-shaped in cross section and made of dielectric material and slidably supported in said trolley track,
recesses in said T-shaped member,
spring means in said recesses,
said brush means being supported on said spring members and urged into contact with said bus bar members by said spring.
10. A support for an electrical device comprising a main track U-shaped in cross section,
a trolley track U-shaped in cross section,
said trolley track being substantially smaller in cross section than said main track and disposed in said main track,
said trolley track having a web with two spaced flanges fixed to said web,
said main track having a web with two spaced flanges fixed to said web,
said trolley track web resting on said main track web and said trolley track flanges being spaced inwardly from and generally parallel to said main track flanges,
said trolley track being made of a dielectric material,
means for supporting said main track and said trolley track on a ceiling,
a carriage having spaced wheels,
first support means on said main track flanges for supporting said carriage wheels,
said carriage wheels resting on said support means,
a trolley,
said trolley having spaced laterally extending first and second brush means,
means on said trolley track guiding said trolley therethrough,
spaced bus bar means fixed to the inside surface of said trolley track flanges,
said bus bar means being adapted to be connected to a source of electricity,
said brushes on said trolley each slidably engaging one of said bus bars,
electrical connection means for connecting said brushes to electrical circuit means in said carriage.
11. The support recited in claim 10 wherein a third bus bar is fixed to said web of said trolley track,
and third brush means is supported on said trolley slidably engaging said third bus bar means,
and electrical means connecting said third bus bar with fixture means supported on said carriage.
12. The support recited in claim 10 wherein said trolley track is made of a single integral thermoplastic member.
13. The support recited in claim 12 wherein said trolley is made of a dielectric material.

Claims (13)

1. A support for an electrical system comprising a main first channel track having means including a first web and spaced downwardly extending first and second flanges attached to said first web, second channel means supporting bus bars on said main track, said second channel means having a second web, a third flange and a fourth flange, a first bus bar supported on said Second web and a second bus bar supported on said third flange and a third bus bar supported on said fourth flange, means for connecting said bus bars to a source of electricity, said second channel means comprising dielectric means between said bus bars and said main track whereby a low electrical leakage results between said bus bars and said track.
2. The support recited in claim 1 wherein a carriage is supported on a carriage track means, and trolley means attached to said carriage, brush means on said trolley means making electrical contact with said bus bars whereby electrical means supported on said carriage is connected to said electrical means connected to said bus bars.
3. The support recited in claim 2 wherein said trolley is made of dielectric material.
4. A support for an electrical device having a carriage and a trolley supported on said carriage, said support comprising a main track having a web adapted to be attached to a ceiling, a first flange and a second flange fixed to said web and extending downwardly therefrom in spaced relation to each other, means on said first flange and on said second flange for supporting wheels attached to said carriage, a fixture supported on said carriage, a trolley track having a web disposed generally parallel to said main track web and supported thereon, a third flange and a fourth flange spaced from each other and fixed to said trolley track web extending downwardly therefrom, a first bus bar and a second bus bar made of electrical conductive material and fixed to said third flange and to said fourth flange respectively, said trolley track being made of a dielectric material.
5. The support recited in claim 4 wherein said trolley track is made of a molded thermoplastic material, said trolley track and said third flange and said fourth flange are made integral with each other whereby a low electrical leakage results from said trolley to said main track.
6. A support for an electrical appliance providing minimum leakage of electricity from an electrical fixture comprising a carriage track in the form of an inverted channel adapted to be supported on a ceiling, carriage supporting means for supporting a fixture carrying carriage on said track for movement thereon, a trolley track in the form of an inverted channel smaller in cross section than said carriage track and received in said carriage track and supported therein, said trolley track being supported above said carriage supporting means, said trolley track being made of a dielectric material, electrical bus bar means fixed in said trolley track and adapted to slidably engage brush means supported on a carriage for slidably engaging said contact means whereby electricity is transferred from a source of electricity to said contact means and to said fixture supported on said carriage.
7. The support recited in claim 6 wherein a carriage is supported on said carriage track, and said brush means is supported on its trolley, said trolley being slidably received in said trolley track, said trolley being made of a dielectric material with said brush means supported thereon.
8. The support recited in claim 7 wherein said contact means comprises bus bars fixed to the inside of said trolley track and extending along the inside edges of said downwardly facing channel.
9. The support recited in claim 6 wherein said trolley comprises a member T-shaped in cross section and made of dielectric material and slidably supported in said trolley track, recesses in said T-shaped member, spring means in said recesses, said brush means being supported on said spring members and urged into contact with said bus bar members by said spring.
10. A support for an electrical device comprising a main track U-shaped in cross section, a trolley track U-shaped in cross section, said trolley track being substantially smaller in cross sectIon than said main track and disposed in said main track, said trolley track having a web with two spaced flanges fixed to said web, said main track having a web with two spaced flanges fixed to said web, said trolley track web resting on said main track web and said trolley track flanges being spaced inwardly from and generally parallel to said main track flanges, said trolley track being made of a dielectric material, means for supporting said main track and said trolley track on a ceiling, a carriage having spaced wheels, first support means on said main track flanges for supporting said carriage wheels, said carriage wheels resting on said support means, a trolley, said trolley having spaced laterally extending first and second brush means, means on said trolley track guiding said trolley therethrough, spaced bus bar means fixed to the inside surface of said trolley track flanges, said bus bar means being adapted to be connected to a source of electricity, said brushes on said trolley each slidably engaging one of said bus bars, electrical connection means for connecting said brushes to electrical circuit means in said carriage.
11. The support recited in claim 10 wherein a third bus bar is fixed to said web of said trolley track, and third brush means is supported on said trolley slidably engaging said third bus bar means, and electrical means connecting said third bus bar with fixture means supported on said carriage.
12. The support recited in claim 10 wherein said trolley track is made of a single integral thermoplastic member.
13. The support recited in claim 12 wherein said trolley is made of a dielectric material.
US00318556A 1972-12-26 1972-12-26 Low electrical leakage support Expired - Lifetime US3848714A (en)

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US00318556A US3848714A (en) 1972-12-26 1972-12-26 Low electrical leakage support
CA179,930A CA987753A (en) 1972-12-26 1973-08-29 Voltage supply for rolling fixtures

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US6241064B1 (en) * 1997-04-11 2001-06-05 Andreas Hierzer Fitting, conductor rail and coupling device
US20110000015A1 (en) * 2008-02-18 2011-01-06 Martin Faucher Conductive connection for track-riding patient hoists
US20140305690A1 (en) * 2013-04-12 2014-10-16 Aopen Inc. Track structure capable of supplying power
DE102009011714B4 (en) 2009-03-09 2019-01-31 Wofi Leuchten Wortmann & Filz Gmbh & Co. Kg Mobile light carrier

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