CA1149356A - Lighting device for teletypewriters and office machines - Google Patents
Lighting device for teletypewriters and office machinesInfo
- Publication number
- CA1149356A CA1149356A CA000372131A CA372131A CA1149356A CA 1149356 A CA1149356 A CA 1149356A CA 000372131 A CA000372131 A CA 000372131A CA 372131 A CA372131 A CA 372131A CA 1149356 A CA1149356 A CA 1149356A
- Authority
- CA
- Canada
- Prior art keywords
- circuit board
- fluorescent lamp
- printed circuit
- clad
- insulated
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/18—Mechanisms for rendering the print visible to the operator
- B41J29/19—Mechanisms for rendering the print visible to the operator with reflectors or illuminating devices
-
- 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
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A lighting device for illuminating the printing area of teletypewriters and other office machines has a printed circuit board clad on one side for receiving a pair of spaced fluorescent lamp sockets for holding a fluorescent lamp on the insulated side of the circuit board. On the clad side of the circuit board a conductor surface is printed which functions as the firing strip for the fluorescent lamp and is disposed opposite to the area on the insulated side of the board occupied by the fluorescent lamp.
The entire circuit board assembly is mounted in the teletypewriter or other machine to be illuminated.
A lighting device for illuminating the printing area of teletypewriters and other office machines has a printed circuit board clad on one side for receiving a pair of spaced fluorescent lamp sockets for holding a fluorescent lamp on the insulated side of the circuit board. On the clad side of the circuit board a conductor surface is printed which functions as the firing strip for the fluorescent lamp and is disposed opposite to the area on the insulated side of the board occupied by the fluorescent lamp.
The entire circuit board assembly is mounted in the teletypewriter or other machine to be illuminated.
Description
.
.: . , .:
.
, BACKGROUND OF THE INVENTION
Field of the Invention The present invention relates to lighting devices for illuminating the printing area of teletypewriters and other office machines, and in particular to such a device employing a fluorescent lamp.
Description of the Prior Art The use of various types of lamps disposed in the housing or casing cover of teletypewriters and other office machines is known in the art for illuminating the printing area of such machines. Such lamps have previously employed commercially standard sized lamp sockets which are clamped or otherwise mounted inside the cover of the machine, and the associated wiring is similarly clamped inside the cover. It is kno~in to employ fluorescent lamps as the source of illumination for such office machine lighting devices, whereby specially constructed fluorescent lamps having firing strips vaporized on the lamps are customarily used. Metal casings have also been used to contain standard lamps. Such special fluorescent lamps are relatively expensive and standard lamps with commercially sized lamp sockets in metal casings occupy a relatively large amount of space.
~93S6 SUMMARY OF THE INVENTION
-It is an object of the present invention to provide a fluorescent lamp holding device for illuminating the printing area in teletypewriters and other office machines which permits the use of standard fluorescent lamps as weIl as having small external measurements so as to occupy a minimum amount of space.
The above object îs inventiveIy achieved by the use of a printed circuit board which is clad on one side and insulated on the opposite side. The insulated side of the board receives a pair of spaced fluorescent lamp sockets and the conductor side of the board in the region thereof opposite the region occupied by the fluorescent lamp on the insulated side of the board, has a conductor surface which functions as the firing strip for the fluorescent lamp.
In a preferred embodiment of the invention, the laminated printed circuit board has a number OL recesses for receiving tabs or lugs which are part of the teletypewriter housing for mounting and locking the printed circuit board with the fluorescent lamp held thereon in the machine casing.
The lighting device constructed in accordance with the inventive concept disclosed herein permits the use of standard home fluorescent lamps in the housing of the teletypewriter or other office machine. The recesses in the printed circuit board permit easy installation and removal of the entire circuit board assembly, including the fluorescent lamp held thereon, and moreover the entire assembly has relatively small external dimensions so as to occupy a minimum amount of space.
DESCRIPTION GF THE DRAWINGS
Fig, 1 is a plan elevational view of a lighting device construct~d in accordance with the principles of the present invention.
Fig. 2 is a side view of the device shown in Fig. 1.
~1~9356 DESCRIPTION OF THE PREFERRED EMBODIMENTS
A lighting device for illuminating the printing area of a teletypewriter or other office machine is shown in Figs. 1 and 2.
The device has a printed circuit board 5 which is printed on one side and insulated on the other side. A pair of conventional fluorescen~ lamp sockets 2 are mounted in spaced relation on the insulated side of the circuit board 5 for receiving a standard fluorescent lamp 1 therebetween. A firing strip 7 for the fluorescent lamp 1 is disposed on the opposite side of the printed circuit board 5 in the area opposite to the area on the insulated side of the board 5 which is occupied by the lamp 1. ~uring assembly of the device shown in Figs. 1 and 2, the contact springs 6 of the sockets 2 are inserted into the printed circuit board 5 and the lamp sockets 2 are locked on the board 5 by snap connections 4 and are electrically connected to appropriate runs on the clad side of the board 5 by any suitable solder flow method such as the Schwall method. A com-mercially sized fluorescent lamp 1 is inserted between the lamp sockets 2, turned radially, and thus locked in the sockets 2.
In addition to the lamp sockets 2 and the fluorescent lamp 1, a plug connector 8 is disposed on the insulated side of the circuit board 5, from which plug 8 all electrical connections neces-sary to operation of the fluorescent lamp 1 lead by means of ribbon lines. These connections include, among others, a connection to a fluorescent lamp ballast (not shown). This fluorescent lamp ballast, upon activation of a switch for energizing the lamp 1, energizes the fluorescent lamp via the firing strip 7 which is protected from contact on the backside of the printed circuit board parallel to the fluorescent lamp.
The entire 12mp structure is mounted and locked in the housing or cover of the machine to be illuminated by a number of recesses 10 in the circuit board 5 which receive a like number of detents 9 which are integrally formed on the cover or housing of the machine, and no further fastening means are necessary.
It will be apparent to those skilled in the art that other embodiments employing the inventive concept disclosed herein are possible such as, for example, the contact springs 6 which are soldered to the circuit board 5 may be shaped with a flange or the like so that the lamp sockets are held in the printed circuit board without the use of the snap connections 4. The printed circui~
board may of course be screwed to the housing of the machine to be illuminated in place of the use of the detents 9 and the recesses 10.
Moreover, depending upon the size of the area to be illuminated, the circuit board 5 could be lengthened to accommodate a longer fluorescent lamp 1 in which case the firing electronics for the fluorescent lamp 1 could be entirely mounted on the printed circuit board 5.
Th~ lighting device described above permits the use of a standard 1uorescent lamp for illuminating teletypewriters and other office machines and permits mounting of the device in the housing of the machine in such a manner as to signîficantly conserve space and weight by a screwless snap connection to the housing of the machine.
Although modifications and changes may be suggested by those skilled in the art it is the intention of the inventors to embody within the patent warranted hereon all changes and modifica-tions as reasonably and properly come within the scope of their contribution to the art.
.: . , .:
.
, BACKGROUND OF THE INVENTION
Field of the Invention The present invention relates to lighting devices for illuminating the printing area of teletypewriters and other office machines, and in particular to such a device employing a fluorescent lamp.
Description of the Prior Art The use of various types of lamps disposed in the housing or casing cover of teletypewriters and other office machines is known in the art for illuminating the printing area of such machines. Such lamps have previously employed commercially standard sized lamp sockets which are clamped or otherwise mounted inside the cover of the machine, and the associated wiring is similarly clamped inside the cover. It is kno~in to employ fluorescent lamps as the source of illumination for such office machine lighting devices, whereby specially constructed fluorescent lamps having firing strips vaporized on the lamps are customarily used. Metal casings have also been used to contain standard lamps. Such special fluorescent lamps are relatively expensive and standard lamps with commercially sized lamp sockets in metal casings occupy a relatively large amount of space.
~93S6 SUMMARY OF THE INVENTION
-It is an object of the present invention to provide a fluorescent lamp holding device for illuminating the printing area in teletypewriters and other office machines which permits the use of standard fluorescent lamps as weIl as having small external measurements so as to occupy a minimum amount of space.
The above object îs inventiveIy achieved by the use of a printed circuit board which is clad on one side and insulated on the opposite side. The insulated side of the board receives a pair of spaced fluorescent lamp sockets and the conductor side of the board in the region thereof opposite the region occupied by the fluorescent lamp on the insulated side of the board, has a conductor surface which functions as the firing strip for the fluorescent lamp.
In a preferred embodiment of the invention, the laminated printed circuit board has a number OL recesses for receiving tabs or lugs which are part of the teletypewriter housing for mounting and locking the printed circuit board with the fluorescent lamp held thereon in the machine casing.
The lighting device constructed in accordance with the inventive concept disclosed herein permits the use of standard home fluorescent lamps in the housing of the teletypewriter or other office machine. The recesses in the printed circuit board permit easy installation and removal of the entire circuit board assembly, including the fluorescent lamp held thereon, and moreover the entire assembly has relatively small external dimensions so as to occupy a minimum amount of space.
DESCRIPTION GF THE DRAWINGS
Fig, 1 is a plan elevational view of a lighting device construct~d in accordance with the principles of the present invention.
Fig. 2 is a side view of the device shown in Fig. 1.
~1~9356 DESCRIPTION OF THE PREFERRED EMBODIMENTS
A lighting device for illuminating the printing area of a teletypewriter or other office machine is shown in Figs. 1 and 2.
The device has a printed circuit board 5 which is printed on one side and insulated on the other side. A pair of conventional fluorescen~ lamp sockets 2 are mounted in spaced relation on the insulated side of the circuit board 5 for receiving a standard fluorescent lamp 1 therebetween. A firing strip 7 for the fluorescent lamp 1 is disposed on the opposite side of the printed circuit board 5 in the area opposite to the area on the insulated side of the board 5 which is occupied by the lamp 1. ~uring assembly of the device shown in Figs. 1 and 2, the contact springs 6 of the sockets 2 are inserted into the printed circuit board 5 and the lamp sockets 2 are locked on the board 5 by snap connections 4 and are electrically connected to appropriate runs on the clad side of the board 5 by any suitable solder flow method such as the Schwall method. A com-mercially sized fluorescent lamp 1 is inserted between the lamp sockets 2, turned radially, and thus locked in the sockets 2.
In addition to the lamp sockets 2 and the fluorescent lamp 1, a plug connector 8 is disposed on the insulated side of the circuit board 5, from which plug 8 all electrical connections neces-sary to operation of the fluorescent lamp 1 lead by means of ribbon lines. These connections include, among others, a connection to a fluorescent lamp ballast (not shown). This fluorescent lamp ballast, upon activation of a switch for energizing the lamp 1, energizes the fluorescent lamp via the firing strip 7 which is protected from contact on the backside of the printed circuit board parallel to the fluorescent lamp.
The entire 12mp structure is mounted and locked in the housing or cover of the machine to be illuminated by a number of recesses 10 in the circuit board 5 which receive a like number of detents 9 which are integrally formed on the cover or housing of the machine, and no further fastening means are necessary.
It will be apparent to those skilled in the art that other embodiments employing the inventive concept disclosed herein are possible such as, for example, the contact springs 6 which are soldered to the circuit board 5 may be shaped with a flange or the like so that the lamp sockets are held in the printed circuit board without the use of the snap connections 4. The printed circui~
board may of course be screwed to the housing of the machine to be illuminated in place of the use of the detents 9 and the recesses 10.
Moreover, depending upon the size of the area to be illuminated, the circuit board 5 could be lengthened to accommodate a longer fluorescent lamp 1 in which case the firing electronics for the fluorescent lamp 1 could be entirely mounted on the printed circuit board 5.
Th~ lighting device described above permits the use of a standard 1uorescent lamp for illuminating teletypewriters and other office machines and permits mounting of the device in the housing of the machine in such a manner as to signîficantly conserve space and weight by a screwless snap connection to the housing of the machine.
Although modifications and changes may be suggested by those skilled in the art it is the intention of the inventors to embody within the patent warranted hereon all changes and modifica-tions as reasonably and properly come within the scope of their contribution to the art.
Claims (3)
1. A lighting device for holding and energizing a standard fluorescent lamp for illuminating the printing area of teletypewriters and office machines comprising:
a printed circuit board which is clad on one side and insulated on an opposite side;
a pair of spaced fluorescent lamp receiving sockets mounted on the insulated side of said printed circuit board for receiving said fluorescent lamp, said lamp sockets each having soldered-in contact springs; and a conductor surface on the clad side of said printed circuit board functioning as a firing strip for energizing the fluorescent lamp, said conductor surface being disposed on said clad side of said circuit board in an area opposite to the area occupied by said fluorescent lamp on the insulated side of said circuit board.
a printed circuit board which is clad on one side and insulated on an opposite side;
a pair of spaced fluorescent lamp receiving sockets mounted on the insulated side of said printed circuit board for receiving said fluorescent lamp, said lamp sockets each having soldered-in contact springs; and a conductor surface on the clad side of said printed circuit board functioning as a firing strip for energizing the fluorescent lamp, said conductor surface being disposed on said clad side of said circuit board in an area opposite to the area occupied by said fluorescent lamp on the insulated side of said circuit board.
2. The device of claim 1 wherein said printed circuit board has a plurality of recesses for receiving a like plurality of detents integrally formed on a housing of said teletypewriter for mounting and locking said printed circuit board in said housing.
3. The device of claim 1 further comprising a pair of snap locks carried on said circuit board for respectively receiving and locking said fluorescent lamp sockets and wherein said soldered-in contact springs extend through said circuit board.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19808006288 DE8006288U1 (en) | 1980-03-07 | 1980-03-07 | LIGHTING DEVICE FOR TELEVISION AND OFFICE MACHINES |
| DEG8006288.0 | 1980-03-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1149356A true CA1149356A (en) | 1983-07-05 |
Family
ID=6713540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000372131A Expired CA1149356A (en) | 1980-03-07 | 1981-03-03 | Lighting device for teletypewriters and office machines |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0035747B1 (en) |
| JP (1) | JPS56138802A (en) |
| CA (1) | CA1149356A (en) |
| DE (1) | DE8006288U1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3726319A1 (en) * | 1987-08-07 | 1989-02-16 | Happich Gmbh Gebr | Illuminating device |
| DE3912299A1 (en) * | 1989-04-14 | 1990-11-29 | Joerg Michael Uhl | Modular mounting for fluorescent HV display tubes - has plug-in unit construction and easily substituted discharge tube suitable for signs |
| GB9707528D0 (en) * | 1997-04-14 | 1997-06-04 | Limpkin George A | Bus bar luminaire & signs |
| ITBO20110169A1 (en) * | 2011-04-01 | 2012-10-02 | L A S Di Cipolli Lorenzo & C S N C | FLUORESCENT TUBE LAMPS: "MODULE WITHOUT WIRING" AND "MODULE WITH REDUCED WIRING". |
| WO2019061547A1 (en) * | 2017-09-30 | 2019-04-04 | 王恩珮 | Cascadable waterproof support lamp |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB999758A (en) * | 1960-12-13 | 1965-07-28 | Ass Elect Ind | Improvements in or relating to fittings for fluorescent lamps |
| US3514590A (en) * | 1968-04-16 | 1970-05-26 | Calculations Inc | Fluorescent luminaire |
-
1980
- 1980-03-07 DE DE19808006288 patent/DE8006288U1/en not_active Expired
-
1981
- 1981-03-03 CA CA000372131A patent/CA1149356A/en not_active Expired
- 1981-03-04 EP EP81101557A patent/EP0035747B1/en not_active Expired
- 1981-03-06 JP JP3236181A patent/JPS56138802A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE8006288U1 (en) | 1980-06-04 |
| EP0035747B1 (en) | 1984-02-08 |
| EP0035747A1 (en) | 1981-09-16 |
| JPS56138802A (en) | 1981-10-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |