US3919540A - Safety light - Google Patents

Safety light Download PDF

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Publication number
US3919540A
US3919540A US459921A US45992174A US3919540A US 3919540 A US3919540 A US 3919540A US 459921 A US459921 A US 459921A US 45992174 A US45992174 A US 45992174A US 3919540 A US3919540 A US 3919540A
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US
United States
Prior art keywords
light
bed
fixture
light fixture
unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US459921A
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English (en)
Inventor
Francis J Burst
Eugene H Fullenkamp
James H Scott
David J Sunderman
L Dale Foster
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hill Rom Co Inc
Original Assignee
Hill Rom Co Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hill Rom Co Inc filed Critical Hill Rom Co Inc
Priority to US459921A priority Critical patent/US3919540A/en
Priority to JP7903274A priority patent/JPS559121B2/ja
Application granted granted Critical
Publication of US3919540A publication Critical patent/US3919540A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • F21V33/00—Structural combinations of lighting devices with other articles, not otherwise provided for
    • F21V33/0064—Health, life-saving or fire-fighting equipment
    • F21V33/0068—Medical equipment
    • F21V33/0072—Hospital beds

Definitions

  • ABSTRACT A light assembly for a hospital room head wall having means for positioning a bed with respect to-the light, means providing a source of electrical energy for the bed and means responsive to interferring movement of the bed with the light to interrupt the supply of electrical energy to the bed.
  • This invention relates to a light fixture adapted to be mounted on a wall.
  • a most appropriate use of the invention is in conjunction with a hospital or nursing home bed where it provides functions and capabilities not previously available to patients, examining doctors and nurses.
  • the instant invention includes a wall mounted light assembly having a light unit for emitting light; a guide means for properly locating a hospital bed with respect to the light unit, and a safety means which prohibits interference between the bed and the light fixture.
  • the light unit includes a normal overhead wall mounted direct reading light and an indirect light which can be moved to a second examining position for increasing the intensity of the light directed towards the hospital bed. Additionally, this unit includes an electrically actuated safety circuit which interrupts power delivery to the hospital bed in the event of an undesireable elevation of the bed.
  • FIG. 1 is a perspective view of a preferred embodiment of the instant invention mounted upon a wall ready to receive a hospital bed which is indicated in dotted lines;
  • FIG. 2 is a schematic circuit diagram depicting the safety features of the instant invention, with the light unit and associated bed being indicated in dotted lines;
  • FIG. 3 is an exploded view in perspective of the light unit of the instant invention with portions broken away;
  • FIG. 4 is a preferred embodiment of the circuit diagram of our invention.
  • FIG. 5 is a side elevation view in section of a portion of the light unit and illustrates a method of mounting same to a vertical wall;
  • FIG. 6 is a side elevation view of the mounted light unit with the indirect light unit being depicted by dotted lines in its second examining position;
  • FIG. 7 is an enlarged perspective view of one end of the preferred embodiment of the lighting system with portions broken away;
  • FIG. 8 is a plan view of the light unit of the preferred embodiment of the instant invention with portions brokeri away;
  • FIG. 9 is an elevation view of the light unit with portions broken away.
  • the light assembly 10 of the preferred embodiment includes a light unit or fixture 11 which carries fluorescent light tubes. This unit is mounted to the wall in a manner subsequently described. Depending from the light unit 11 is a vertical center rail 12 which extends downwardly for attachment to a guide means -14.
  • the guide means may include a hollow horizontal rail 16 carrying at each end molded end pieces 18 which may be formed of a polyethylene or other thermoplastic material.
  • the interior surfaces of these end pieces include inwardly inclined guide surfaces 20 which are spaced apart for engagement with the bed posts of the head end of the bed 22. As the bed is pushed towards the wall, these surfaces 20 laterally guide the bed to center it beneath the light unit 11. Accordingly, the desired cooperation between a hospital bed 22 and the light assembly 10 is depicted in FIG. 2 in which the guide means 14 have centered the bed directly below the light fixture '11.
  • the circuit of FIG. 2 discloses an electrical conductor 24 extending from the wall into the light fixture 11 and down the hollow center rail 12 into the horizontal guide means 14.
  • a receptacle 25 which is utilized for directing electrical power through power cord 23 to the electrically operated bed 22 for vertical or other movement.
  • an IV rod 26 carrying a container 28 of an intravenous solution which is being fed to a patient. Since the IV rod extends above the bed, and is usually mounted to move vertically with the bed, it may also be elevated so as to engage and strike the light fixture ll of the instant invention.
  • a safety switch 30 is inserted in the conductor 24 delivering power to the electrically operated bed.
  • undesirable upward movement of the bed and the IV rod will cause the safety switch to actuate, stopping further upward movement of the bed and providing indicating signals to the hospital staff that the bed has been raised to an undesirable height.
  • This circuit arrangement will be discussed in more detail subsequently.
  • FIGS. 3 and 57 disclose the details of the light fixture 11.
  • This unit is carried by a mounting bracket 40 affixed to the vertical wall by conventional means.
  • the bracket 40 extends for the length of the light unit 11 and has a horizontal flange 42 extending outwardly from the wall.
  • Pivotally connected to the mounting bracket 40 adjacent each end is an L-shaped support assembly 44 which carries an elongated divider panel 46 dividing the lighting unit into two compartments.
  • the first compartment A comprises a direct lighting unit which provides light downwardly for the benefit of the patient.
  • An upper compartment B above the panel 46 comprises an indirect lighting unit, the details of which will be subsequently explained.
  • FIG. 7 discloses the interconnection between the mounting bracket 40 and the L-shaped support members 44 which serves as a frame member.
  • Each member 44 has an aperture adjacent the bottom portion thereof to permit a pivotal attachment of each with two brackets 48 carried at opposite ends of the mounting bracket 40.
  • bolt 49 may pass through the mounting brackets 48 and the apertures to pivotally connect each member 44 to the brackets.
  • each support member 44 has two sockets 50 for mounting two fluorscent tubes 51 (FIG. 9) which extend for the length of unit 11 between these opposing members 44. These tubes comprise the direct light compartment A.
  • the light unit 11 is rotated to a horizontal position and connected to the top of mounting bracket 40 through a horizontal extension 54 of the divider panel 46.
  • the divider panel 46 is first bent at a 90 angle to form vertical section 52. Then, the panel is again bent at 90, to extend horizontally toward the wall below flange 42 of the mounting bracket.
  • bolts 55 are inserted through the apertures of the horizontal flange 42 and into the upper horizontal extension 54 of divider panel 46 to lock the unit in the horizontal position.
  • each support member 44 On each support member 44 is mounted an S-shaped end bracket 60 by welding or other means.
  • This bracket has a flange perpendicular to the wall and is provided with apertures for mounting end plates 62 preferably formed of plastic.
  • end plates 62 On the inner surface of end plates 62 are bosses which space the end plate from the brackets 60 while bolts extending through apertures centered in the bosses attach the plates to the end brackets 60.
  • the end plates 62 also have on each of their interior surfaces a projection 64 adapted to mate with and extend into upper recesses 68 of a front cover 70 and to permit pivotal rotation of said front cover thereupon.
  • This front cover is preferably formed of a thermoplastic and has the cross sectional shape disclosed in FIG. 6 which includes the upper recess 68, a horizontal portion 69 and a lower recess 68a. Below the horizontal portion and the lower recess is an inturned flange or lip 72 which also extends for the entire length of the front cover and the light fixture ll. Openings 680 are pro- 4 vided in each end plate 62 for receiving machine screws 68b which extend into lower recesses 68a of front cover 70 to secure this cover in its closed position.
  • This inturned flange 72 is adapted to receive outwardly extending flange 76 of a transparent plastic lens 78 which extends underneath the direct lighting unit.
  • a similar flange at the rear end of the lens 78 is supported by a bottom hinge 82 which includes an L-shaped piece of sheet metal (FIG. 3) having at the top thereof extending pins 84 on each end. These pins are adapted to engage support brackets 88 (See FIG. 6) which are carried by the mounting bracket 40.
  • FIG. 3 it may be desirable to divide the bottom hinge 82 into two separate pieces, one for each side of the light fixture 11.
  • the lens 78 is free to move vertically upward, and is restrained from downward movement by flanges at the front and at the rear of the light unit 1 1.
  • a chain 79 is affixed to each end of lens 78.
  • a ring which is mounted on the bosses of end pieces 62.
  • a switch button 90 of safety switch 30 is carried at each end of the light fixture 1 1 just inside the end plates 62 and are supported by sheet metal pieces 94 which may be spot welded or otherwise joined to the L- shaped support members 44.
  • Engagement of the safety switch button 90 by the lens 78 will disconnect the electrical circuit extending to the outlet 25 on the bumper guide means 14 which terminates the delivery of electrical power to the bed unit and precludes further elevation thereof.
  • the actuation of safety switch 90 may also actuate indicator lights and a buzzer to indicate that the bed has been elevated to an interfering height.
  • the indirect lighting compartment B as shown in FIGS. 6, 7 and 8, comprises an elongated carrier member which has at each end a first partition wall 112 carrying sockets 113 which receive elongated fluorscent lighting tubes 1 14.
  • a second partition wall or end member 115 closes the end of carrier 110 and carries a conductor for delivering electric power to these tubes.
  • Supporting the rearward end of the carrier member 110 is an elongated light support member 116 which has an inclined section extending downwardly from the wall terminating in an indentation to receive a flange of the support member 110. From this indentation, the light support member 1 16 extends downwardly and engages the horizontal extension 54 of divider member 46.
  • the forward end of the indirect light carrier 110 terminates in a hinge section 120 connected by a pin to another hinge section 122 mounted upon a square tubular member 126 extending for the length of the lighting fixture 11.
  • the bottom side of the tubular member 126 may extend across divider panel 46 and be attached to it by metal screws or welding.
  • the tubular member 126 also carries indicator lights which provide a visual signal that the bed and its IV rod has been elevated too high.
  • each end of this member terminates in an exposed cut-out 160.
  • Adjacent each cutout is mounted an indicator light 162 by a bracket 164 welded to the tubular section.
  • Forward of the indicator light is the front cover 70.
  • This indicator lens 166 may be a transparent plastic which is merely slid into recessses molded into the front panel piece. If desired, these lenses may carry printed material such as pull out bed or lower bed to indicate interference between the IV rod and the lens 78.
  • the indirect light unit is also provided with a lens 130 which is retained by U-shaped flanges at both the front and rear end of the support member 110 as shown in FIG. 7.
  • the indirect light unit normally provides light from the fluorscent tubes upwardly against the ceiling of the room.
  • hinge members 120 and 122 permit rotation of this unit for approximately 130 to the dotted line position shown in FIG. 6 where it is retained by chain member 131. If such is done, the indiret light unit will provide additional light intensity to the bed positon below the light assembly, and may conveniently be used by examining doctors or nurses. This rotation is facilitated by pivot handles 132 (See FIG. 8) attached at each end of the indirect light unit by a flat metal plate 134 welded or otherwise fixed to carrier member 110.
  • the handle has an outside tubular member 136 which is rigidlyconstrained for pivotal movement with the plates 134. Telescoping within this outer member 136 is an inner member 138 which is biased inwardly by a spring 140 and has a finger or projection 142 extending outwardly therefrom.
  • a spring 140 When the examining lights are to be used, one merely grasps the projection 142 and pulls out: wardly to telescope the inner member to provide lever; age in rotating the indirect light unit until all of the slack is taken up in the chain member 131.
  • the metal plates 134 rest within recesses 63 of end pieces 62.
  • the circuitry and ballasts 150 for both light units are contained in the rearward portion of the light fixture 11. These components may be mounted to the sheet metal in any conventional manner. Additionally, and as indicated at dotted lines, this space may contain a buzzer 152 and a four-way switch 154, the switch hav; ing a chain 156 extending downwardly for actuation of the indirect or direct lamps, or both.
  • This four-way switch has an of position, an on position for the direct and indirect light units, and a fourth position which actuates both of these lighting units.
  • a source 180 is connected in series by a conductor 182 through two safety switches 30 to the outlet 25. Another conductor 184 completes the circuit with the source.
  • Each of the switches 30 located at opposite ends of the light unit 1 1 are of the single pole, double throw type, preferably having a snap action. They would be biased to a normally closed position so as to normally provide electrical energy to the receptacle 25. In the event the IV rod is extended so as to interfere with the light assembly 10, the lens 78 will! be pushed upward so as to actuate the switch button 90 of one of the safety switches 30 to move the switch from the normally closed position to the normally open position.
  • This switch activation will interrupt the series circuit leading to the outlet 25 on the bumper guide assembly so as to deprive the bed of electrical power necessary for further elevation, thus precluding damage to the light fixture 11.
  • a second safety circuit 186 is actuated.
  • This circuit contains two indicator lights 162 which are connected to the return line 184. When these indicator lights come on, they may be observed through the cut-outs l60, and the small lens 166 positioned at each end of the front cover 70.
  • This circuit 186 may also include a buzzer 152 which provides an audio signal that the bed has been elevated too high.
  • FIG. 9 discloses that the electrical circuit is interconnected to the indirect and direct lighting circuits.
  • conductor 182 is also directed to a four position rotary stepping switch 154 for delivery of current to the ballast for the direct and indirect reading lights.
  • a light assembly which operates toproperly position a bed, and to provide direction of the light to the bed of different intensities.
  • a safety unit has been provided which will preclude undesirable or damaging elevation of the bed and an associated IV rod 26 which might otherwise damage the light fixture.
  • the light fixture 11 may be used along or in conjunction with the bed guide.
  • a safety light assembly comprising:
  • an elongated horizontal light fixture adapted to be mounted on a wall
  • a bumper assembly adapted to be attached to a wall below said light fixture and having guide means for locating a hospital bed thereof centrally of said light fixture, said bumper assembly having an electrical outlet for delivering electric energy to said hospital bed;
  • a movable switch in said circuit and carried by said light fixture responsive to interfering movement of said bed with said light fixture to disrupt the supply of electric energy to said bed.
  • said light fixture comprises a light device for directing light upwardly and a light unit for directing light downwardly upon a bed centered by said bumper assembly.
  • a hospital light assembly comprising:
  • said second lighting fixture comprises an elongated b. safety switch means carried by said light fixture for support mem r carryi g fluorscenl ligh g u precluding damaging interference between equipand ment carried by said bed and said light fixture.
  • Safety switch means includes; - ⁇ fi from? f u horizontally position to a a. an electrical circuit adapted for connection to a posmon F f f source of electric energy extending through said 7.
  • switch means within said circuit for interrupting comprises hinge means carried by said fixture along its forward edge away from the wall;
  • said light assembly carries guide means for centerelectric power delivery to said bed upon physical contact between said equipment and said light fixture.
  • a light assembly comprising:
  • an enlongated light fixture adapted to be mounted on a wall to extend outwardly therefrom;
  • said fixture having a first light unit for directing light downwardly and a second light unit for directing a bed directly below said first lighting unit. g light Upwardly; and 10.
  • a safety light assembly compri ing; c. means for pivoting said second light unit for directa. a light fixture adapted to be mounted on a wall ing light downwardly.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Engineering & Computer Science (AREA)
  • Invalid Beds And Related Equipment (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
US459921A 1974-04-11 1974-04-11 Safety light Expired - Lifetime US3919540A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US459921A US3919540A (en) 1974-04-11 1974-04-11 Safety light
JP7903274A JPS559121B2 (enrdf_load_stackoverflow) 1974-04-11 1974-07-10

Applications Claiming Priority (1)

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US459921A US3919540A (en) 1974-04-11 1974-04-11 Safety light

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US3919540A true US3919540A (en) 1975-11-11

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US459921A Expired - Lifetime US3919540A (en) 1974-04-11 1974-04-11 Safety light

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JP (1) JPS559121B2 (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4149222A (en) * 1977-03-30 1979-04-10 Chemetron Corporation Bed light safety apparatus
US4821470A (en) * 1988-06-17 1989-04-18 Hill-Rom Company, Inc. Head wall for hospital bed
US4882566A (en) * 1988-08-03 1989-11-21 Hill-Rom Company, Inc. Safety control system for a hospital bed
US5735593A (en) * 1996-08-29 1998-04-07 Hill-Rom, Inc. Light fixture apparatus for a hospital room
WO1999026017A1 (en) * 1997-11-14 1999-05-27 Hill-Rom, Inc. Light fixture apparatus with auxiliary light
US6019481A (en) * 1996-08-29 2000-02-01 Hill-Rom, Inc. Light fixture with recessed electrical outlet, data receptacle, and support frame for mounting on a wall
US6174068B1 (en) 1998-09-29 2001-01-16 Hill-Rom, Inc. Light fixture with auxiliary light
US20100236809A1 (en) * 2009-03-20 2010-09-23 Hill-Rom Services, Inc. Ergonomic bed locator
US20170042750A1 (en) * 2011-11-22 2017-02-16 Paramount Bed Co., Ltd. Bed device
US9854919B1 (en) 2016-06-20 2018-01-02 H.T.K. Design, LLC Illuminated headboard

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5350180U (enrdf_load_stackoverflow) * 1976-10-01 1978-04-27
JPS5780813A (en) * 1980-11-08 1982-05-20 Sanyo Electric Co Ltd Amplifier
JPS5866417U (ja) * 1981-10-29 1983-05-06 横河・ヒユ−レツト・パツカ−ド株式会社 電源装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2998508A (en) * 1959-05-19 1961-08-29 Sunbeam Lighting Company Hospital service console and bedlight fixture combination
US3084247A (en) * 1961-07-03 1963-04-02 Sunbeam Lighting Company Wall mounted hospital bed light fixture and service console combination
US3354301A (en) * 1967-02-09 1967-11-21 Bobrick Mitchell Room utility and service system
US3514794A (en) * 1968-08-12 1970-06-02 Ital Bed Cost Letti Affini Bed units
US3557359A (en) * 1968-01-22 1971-01-19 Electro Systems Inc Hospital light
US3660591A (en) * 1970-10-26 1972-05-02 Hill Rom Co Inc Hospital in-patient service core module
US3692920A (en) * 1970-04-13 1972-09-19 Sandro Santarelli Raceway for beds of hospitals and the like

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2998508A (en) * 1959-05-19 1961-08-29 Sunbeam Lighting Company Hospital service console and bedlight fixture combination
US3084247A (en) * 1961-07-03 1963-04-02 Sunbeam Lighting Company Wall mounted hospital bed light fixture and service console combination
US3354301A (en) * 1967-02-09 1967-11-21 Bobrick Mitchell Room utility and service system
US3557359A (en) * 1968-01-22 1971-01-19 Electro Systems Inc Hospital light
US3514794A (en) * 1968-08-12 1970-06-02 Ital Bed Cost Letti Affini Bed units
US3692920A (en) * 1970-04-13 1972-09-19 Sandro Santarelli Raceway for beds of hospitals and the like
US3660591A (en) * 1970-10-26 1972-05-02 Hill Rom Co Inc Hospital in-patient service core module

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4149222A (en) * 1977-03-30 1979-04-10 Chemetron Corporation Bed light safety apparatus
US4821470A (en) * 1988-06-17 1989-04-18 Hill-Rom Company, Inc. Head wall for hospital bed
US5323565A (en) * 1988-06-17 1994-06-28 Hill-Rom Company, Inc. Head wall for hospital bed
US5653064A (en) * 1988-06-17 1997-08-05 Hill-Rom Company, Inc. Head wall for hospital bed
US4882566A (en) * 1988-08-03 1989-11-21 Hill-Rom Company, Inc. Safety control system for a hospital bed
US5735593A (en) * 1996-08-29 1998-04-07 Hill-Rom, Inc. Light fixture apparatus for a hospital room
US6019481A (en) * 1996-08-29 2000-02-01 Hill-Rom, Inc. Light fixture with recessed electrical outlet, data receptacle, and support frame for mounting on a wall
WO1999026017A1 (en) * 1997-11-14 1999-05-27 Hill-Rom, Inc. Light fixture apparatus with auxiliary light
US6174068B1 (en) 1998-09-29 2001-01-16 Hill-Rom, Inc. Light fixture with auxiliary light
US20100236809A1 (en) * 2009-03-20 2010-09-23 Hill-Rom Services, Inc. Ergonomic bed locator
US20170042750A1 (en) * 2011-11-22 2017-02-16 Paramount Bed Co., Ltd. Bed device
US10111791B2 (en) * 2011-11-22 2018-10-30 Paramount Bed Co., Ltd. Bed device
US20190021923A1 (en) * 2011-11-22 2019-01-24 Paramount Bed Co., Ltd. Bed device
US10463552B2 (en) * 2011-11-22 2019-11-05 Paramount Bed Co., Ltd. Bed device
US20200016016A1 (en) * 2011-11-22 2020-01-16 Paramount Bed Co., Ltd. Bed device
US10893992B2 (en) * 2011-11-22 2021-01-19 Paramount Bed Co., Ltd. Bed device
US11426315B2 (en) 2011-11-22 2022-08-30 Paramount Bed Co., Ltd. Bed device
US11786426B2 (en) 2011-11-22 2023-10-17 Paramount Bed Co., Ltd. Bed device
US12053422B2 (en) 2011-11-22 2024-08-06 Paramount Bed Co., Ltd. Bed device
US9854919B1 (en) 2016-06-20 2018-01-02 H.T.K. Design, LLC Illuminated headboard

Also Published As

Publication number Publication date
JPS50136980A (enrdf_load_stackoverflow) 1975-10-30
JPS559121B2 (enrdf_load_stackoverflow) 1980-03-07

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