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US3683168A - Illuminating spectacles for working in the dark - Google Patents

Illuminating spectacles for working in the dark Download PDF

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Publication number
US3683168A
US3683168A US53480A US3683168DA US3683168A US 3683168 A US3683168 A US 3683168A US 53480 A US53480 A US 53480A US 3683168D A US3683168D A US 3683168DA US 3683168 A US3683168 A US 3683168A
Authority
US
United States
Prior art keywords
pole
support
switch
contact
lamp
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
US53480A
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English (en)
Inventor
Joachim Tatje
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.)
Elta Vertriebs GmbH Tatje and Co KG
Original Assignee
Elta Vertriebs GmbH Tatje and Co KG
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 Elta Vertriebs GmbH Tatje and Co KG filed Critical Elta Vertriebs GmbH Tatje and Co KG
Application granted granted Critical
Publication of US3683168A publication Critical patent/US3683168A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L4/00—Electric lighting devices with self-contained electric batteries or cells
    • F21L4/005—Electric lighting devices with self-contained electric batteries or cells the device being a pocket lamp
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C11/00—Non-optical adjuncts; Attachment thereof
    • G02C11/04—Illuminating means

Definitions

  • the present invention relates to a support in spectacle form for a battery-operated lamp comprising at least one incandescent bulb and a switch for breaking the circuit between the latter and the batteries.
  • Such lamps which are known as illuminating spectacles, have the great advantage that, on the one hand, they leave the hands free for working in the dark, while on the other hand, by reason of the factthat they are disposed in the region of the workers eyes, they direct the light beam immediately and automatically on to the working point. This is accompanied by the further advantage that the light can be concentrated on particular points.
  • the batteries for the operation of the lamp are disposed in a separate container which has tobe carried around by the wearer and in which the switch for switching the lamps on and off is also housed. .T he batteries are connected to the lamps through corresponding cables.
  • This invention has for its object to obviate these dis advantages and to provide illuminating spectacles which are simple and cheap to manufacture.
  • the separate container is not required, sothat the user is not hindered in his work or in putting on or taking off the spectacles.
  • the batteries are so secured in the hollow upper rim portion of the spectacles in such a manner that they may be replaced.
  • the two upper rim portions of the spectacle frame desirably are made hollow.
  • the upper rim portion may be constructed in box form and be adapted to be positively or non-positively closed by means of a cover, so that the batteries can be fitted and removed without difficulty.
  • this construction affords the possibility of connecting in series the batteries disposed in the rim portions and of connecting them through the switch to an incandescent bulb disposed in the region of the bridge of the spectacles.
  • the same construction may, of course, be chosen also for binocular illuminating spectacles.
  • the box-form cavities of the upper rim portions of the spectacle frame comprise, at each of the ends closer to the incandescent bulb and remote from the spectacle hinges, a contact for one battery pole, the two battery poles being connected through a wire sealed in the frame or extending through the hollow rim portions, so that a series connection is established.
  • the other pole of one battery is connected through a sealed-in contact member to the base pole of the incandescent bulb, and the other pole of the other battery is connected to the socket pole of the incandescent bulb.
  • Another feature of the invention which is applicable with advantage in combination with the main feature is that the switch is directly incorporated in the spectacle frame, so that no separate accessory part insulated from the spectacle frame is required.
  • the switch actuating member is formed by the forward rim portion for the incandescent bulb.
  • the switch is constructed as a rotary switch comprising a cylindrical switch body forming the forward rim portion, the switch body being so mounted in the spectacle bridge as to be rotatable and axially immovable. Movement in an axial direction may be prevented, for example, by catches or other positive connections which permit free rotation of the switch body.
  • a contact lug for the socket pole of the incandescent bulb is sealed in the switch body. This contact lug extends though the switch body to the outside and can be connected to the corresponding battery pole by rotation of the switch body.
  • the battery pole may extend into the range of rotationof the switch body, for example through a contact member.
  • the contact member is constructed as a hollow rivet and is embedded in the spectacle frame between one upper, hollow rim portion of the frame and the cavity for the switch body of the incandescent bulb. By rotation of the switch, one end of the contact lug can be connected to the hollow rivet, so that the circuit is closed.
  • the rivet head serves at the same time as a switch arresting means, that end of the contact lug which extends through the hollow body being curved and engaging in the hollow rivet head by means of its curvature in the closed-circuit position.
  • the contact consequently constitutes at the same time the arresting means for the switch. In each other position, the incandescent bulb is disconnected.
  • the switch body cooperates with a holder which is fixedly disposed in the spectacle frame and which comprises the contact lug for the base pole and the socket pole, as well as the screwthread for the lamp base.
  • the switch body comprises contact bridges for establishing the electrical connection between one battery pole and the socket pole of the lamp, the said contact bridges becoming operative in particular positions of rotation.
  • contact bridges there are preferably employed balls which engage under spring pressure in corresponding recesses in the socket.
  • one end of the contact lug for the socket pole of the lamp and the end of the contact member bearing against the battery pole are so arranged that the distance between these two ends can be bridged by the ball penetrating into the socket for closing the circuit.
  • FIG. 1 is a front elevation of the illuminating spectacles
  • FIG. 2 is a plan view of the illuminating spectacles
  • FIG. 3 is a side elevation of the illuminating spectacles
  • FIG. 4 is a section along the line IV-IV in FIG. 2;
  • FIG. 5 is a rear view of the switch shown in FIG. 4'
  • FIG. 6 is a section along the line VI-VI in FIG. 1;
  • FIG. 7 is a section, similar to FIG. 4, in the region of the hinge in construction.
  • FIG. 8 is an axial section through a further construction of the switch body.
  • the illuminating spectacles comprise as a support a spectacle frame of conventional form, which thus consists of two upper rim portions 1, the bridge 2 and the bows or sides 4 pivotally connected to the upper rim portions by hinges 3.
  • the upper rim portions 1 are made wider than normal, as is apparent from the drawings, because they are hollow.
  • the cavities 5 in the rim portion are indicated in FIG. 4 and in them there are disposed in the upper rim portions 1 batteries 6 for the operation of the illuminating spectacles. These batteries are so-called miniature batteries supplying a voltage of preferably 1.5 volts.
  • the cavities 5 may be adapted to the cylindrical form of the batteries, or they may at least comprise a number of ridges of like form on which the batteries lie.
  • the rim portions of the spectacle frame are of box form and are sealed at the top by covers 7.
  • covers 7 Each cover, the exact fonn of which is not shown, may be secured to the corresponding rim portion, for example by clips, detents or the like.
  • the cover may also be provided on the rear side opposite to the forward side of the spectacle frame.
  • Each of the cavities 5 which receive the batteries 6 has on its end wall 20, FIG. 6, adjacent to the spectacle hinge a contact member 8 for one pole of each battery.
  • the contact member 8 may, for example, be sealed in the material of the rim portion with the aid of a hollow rivet 9.
  • the two contact members in the cavities are connected together by means of a cable (not shown), which, for example, is also embedded, so that the batteries are connected in series.
  • the other pole of one battery is connected by means of a contact member 10 (FIG. 4) Figure to a contact 11 for the base pole of the incandescent bulb.
  • the other pole 12 of the other battery 6 is connected to a contact 14 for the socket pole of the incandescent bulb through a hollow rivet 13.
  • the incandescent lamp is mounted in a socket l5 situated in the region of the bridge 2 of the spectacle frame and it extends through a forward rim portion 16 which is so mounted in the bridge 2 as to be rotatable but axially non-displaceable.
  • This forward rim portion 10 forms at the same time the switch for switching the incandescent bulb on and off.
  • it comprises a ring 17 through which the contact 14 constructed as a lug extends to the outside.
  • That end 18 of the contact lug 14 which is further from the socket of the incandescent bulb is curved, as may be seen from FIGS. 4 and 5.
  • the contact lug 14 engages in the aperture 19 of the hollow rivet 13, so that a definitive circuit-closing position is obtained.
  • the position of the switch may also be checked from the outside.
  • theforward rim portion 16 is for this purpose so shaped in the region in which it extends beyond the spectacle frame as to differ from the cylindrical form. In the two registering positions, the switch is closed and opened respectively.
  • FIG. 7 shows a construction which is modified in relation to FIG. 6 and in which the contact member corresponding to the contact is formed by a head of a rivet 22 bearing against a battery pole 21.
  • a wire 23 which establishes the series connection extends from the rivet 22 to the other pole of the second battery.
  • the rivet 22 is fitted in a yieldable cross member 24 which extends into recesses in the forward and rear walls 25, 26 of the forward rim portion of the spectacle frame.
  • FIG. 8 shows a switch member which is modified as compared with FIGS. 4 and 5.
  • a switch member 30 which at the same time comprises the forward rim portion for the incandescent lamp, cooperates with a socket 32 for a lamp base 33, the socket being fixedly mounted in the rim of the spectacles.
  • the socket 32 is fixedly mounted on a plate 35 which is secured to pin 34 and which in turn is secured to the spectacle frame.
  • a contact lug 36 for the base pole of the lamp 31 is embedded in the socket 32.
  • the contact lug is made of a sheet-metal strip, the other end 37 of which bears against the pole 39 of one battery 38.
  • a contact lug 40 for the socket pole of the lamp 31 is embedded in the socket and terminates in an end recess in the socket.
  • a contact member 41 terminates which is also disposed in the socket and against which the other pole 42 of the other battery 43 bears.
  • the distance between the two ends of the contact lug 40 and the contact member 41 in the recess in the socket 32 is such that it can be bridged by a ball 44 which closes the circuit under the pressure of a spring 45.
  • the switch comprises a number of circuit-closing positions.
  • the balls 44 also serve as retaining means for holding the switch member 30 in its on and off positions.
  • the construction described above is not only particularly favorable in its application, but it is also simple to manufacture.
  • the various parts of the spectacle frame are produced, together with the necessary conductors and contact members, by injection moulding, pressing or the like, preferably from plastics, so that the electric terminal connecting members are fixedly located.
  • the advantages as compared with the known illuminating spectacles will be particularly apparent from the illustrations in FIGS. 1 and 2 and from the switch design illustrated in FIGS. 4, 5 and 8, since no separate accessories are now required.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Optics & Photonics (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
US53480A 1969-06-27 1970-07-09 Illuminating spectacles for working in the dark Expired - Lifetime US3683168A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE6925796U DE6925796U (de) 1969-06-27 1969-06-27 Leuchtbrille

Publications (1)

Publication Number Publication Date
US3683168A true US3683168A (en) 1972-08-08

Family

ID=6603206

Family Applications (1)

Application Number Title Priority Date Filing Date
US53480A Expired - Lifetime US3683168A (en) 1969-06-27 1970-07-09 Illuminating spectacles for working in the dark

Country Status (3)

Country Link
US (1) US3683168A (de)
DE (1) DE6925796U (de)
FR (1) FR2052892A5 (de)

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4616297A (en) * 1985-10-18 1986-10-07 Liu Ju Fu Spectacles-like illuminating device
US4959760A (en) * 1990-01-19 1990-09-25 Te Sheng Wu Lighting equipment for an eyeglasses
US5455638A (en) * 1993-09-10 1995-10-03 Comdisco, Inc. Electrochromic eyewear
US5455637A (en) * 1993-09-10 1995-10-03 Comdisco, Inc. Electrochromic eyewear system, rechargeable eyewear and external charger therefor
US5521654A (en) * 1993-11-02 1996-05-28 Bertieri; Florenza Combination extended natural eyeglasses and corrective eye magnifier
US5657150A (en) * 1993-09-10 1997-08-12 Eyeonics Corporation Electrochromic edge isolation-interconnect system, process, and device for its manufacture
USD391380S (en) 1997-06-05 1998-02-24 Brantley Stephen L Head mounted flashlight
US5722762A (en) * 1996-07-18 1998-03-03 Soll; David B. Illumination device for mounting on the head of a user
US5835185A (en) * 1993-09-10 1998-11-10 Kallman; William R. Spring-hinged frame for eyeware
US5900720A (en) * 1993-09-10 1999-05-04 Kallman; William R. Micro-electronic power supply for electrochromic eyewear
US20040264177A1 (en) * 2003-06-30 2004-12-30 Webber Ray T Head-mounted light
DE10117446B4 (de) * 2001-04-06 2007-01-04 Optik Sommer Modulares Beleuchtungssystem, Traggestell und Leuchtmitteleinheit dafür
US20110187989A1 (en) * 2005-05-17 2011-08-04 Michael Waters Illuminated eyewear
US20110227509A1 (en) * 2010-03-17 2011-09-22 Hady Saleh Hands-free light controller for headgear mounted illumination device
US8152330B2 (en) 2001-11-07 2012-04-10 Michael Waters Lighted reading glasses
US8235524B2 (en) 2001-11-07 2012-08-07 Michael Waters Illuminated eyewear
US8388164B2 (en) 2005-05-17 2013-03-05 Michael Waters Hands-Free lighting devices
USD682343S1 (en) 2011-12-23 2013-05-14 Michael Waters Lighted glasses
US8444266B2 (en) 2009-09-30 2013-05-21 Michael Waters Illuminated eyewear
US8485682B2 (en) 2007-10-29 2013-07-16 Waters Industries, Inc. Illuminated eyeglass assembly
US8491118B2 (en) 2001-11-07 2013-07-23 Michael Waters Lighted reading glasses
US8540364B2 (en) 2010-09-14 2013-09-24 Michael Waters Lighted glasses
US8979295B2 (en) 2005-05-17 2015-03-17 Michael Waters Rechargeable lighted glasses
USD770143S1 (en) 2014-05-23 2016-11-01 Michael Waters Beanie with means for illumination
US9526287B2 (en) 2011-12-23 2016-12-27 Michael Waters Lighted hat
US9526292B2 (en) 2005-05-17 2016-12-27 Michael Waters Power modules and headgear
US9568173B2 (en) 2011-12-23 2017-02-14 Michael Waters Lighted hat
US9585431B2 (en) 2007-12-18 2017-03-07 Waters Industries, Inc. Lighted hat
US9609902B2 (en) 2011-12-23 2017-04-04 Michael Waters Headgear having a camera device
US9717633B2 (en) 2013-03-15 2017-08-01 Michael Waters Lighted headgear
US9872530B2 (en) 2010-04-30 2018-01-23 Michael Waters Lighted headgear and accessories therefor
US9885465B2 (en) * 2015-05-04 2018-02-06 Ultralight Optics, Inc. Illumination devices
USD824557S1 (en) 2014-12-02 2018-07-31 Michael Waters Flashlight
US10069318B2 (en) 2014-12-02 2018-09-04 Michael Waters LED flashlight with longitudinal cooling fins
US10159294B2 (en) 2012-12-19 2018-12-25 Michael Waters Lighted solar hat
US10791783B1 (en) 2019-05-16 2020-10-06 Waters Industries, Inc. Lighted headgear and accessories therefor
USD949000S1 (en) * 2019-11-29 2022-04-19 Huacai Opto-Electronics Co., Ltd (Yangzhou) Clip for a lamp
US12171293B2 (en) 2021-12-27 2024-12-24 Waters Industries, Inc. Lighted headgear and accessories therefor
WO2024187180A3 (en) * 2023-03-09 2025-01-16 Rutgers, The State University Of New Jersey Dynamic light spectrum absorption eyewear

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1512705A (en) * 1923-01-26 1924-10-21 Margaretten Isidore Flash-light opera glass
US1615067A (en) * 1926-04-15 1927-01-18 Boerman Jacob Inspection light
US2629045A (en) * 1949-10-27 1953-02-17 Gus R Frohlich Flashlight having a central adjustable lamp carrier
US2638532A (en) * 1949-03-23 1953-05-12 Thomas L Brady Combined spectacle frame and light
CH299765A (de) * 1952-01-03 1954-06-30 Pauwels Alfons Brillengestell mit Beleuchtungseinrichtung.
US2904670A (en) * 1957-04-12 1959-09-15 Calmes Andre Illuminating spectacles
US3264464A (en) * 1964-05-25 1966-08-02 Jules P Gits Flashlight and switch therefor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1512705A (en) * 1923-01-26 1924-10-21 Margaretten Isidore Flash-light opera glass
US1615067A (en) * 1926-04-15 1927-01-18 Boerman Jacob Inspection light
US2638532A (en) * 1949-03-23 1953-05-12 Thomas L Brady Combined spectacle frame and light
US2629045A (en) * 1949-10-27 1953-02-17 Gus R Frohlich Flashlight having a central adjustable lamp carrier
CH299765A (de) * 1952-01-03 1954-06-30 Pauwels Alfons Brillengestell mit Beleuchtungseinrichtung.
US2904670A (en) * 1957-04-12 1959-09-15 Calmes Andre Illuminating spectacles
US3264464A (en) * 1964-05-25 1966-08-02 Jules P Gits Flashlight and switch therefor

Cited By (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4616297A (en) * 1985-10-18 1986-10-07 Liu Ju Fu Spectacles-like illuminating device
US4959760A (en) * 1990-01-19 1990-09-25 Te Sheng Wu Lighting equipment for an eyeglasses
US5455638A (en) * 1993-09-10 1995-10-03 Comdisco, Inc. Electrochromic eyewear
US5455637A (en) * 1993-09-10 1995-10-03 Comdisco, Inc. Electrochromic eyewear system, rechargeable eyewear and external charger therefor
US5657150A (en) * 1993-09-10 1997-08-12 Eyeonics Corporation Electrochromic edge isolation-interconnect system, process, and device for its manufacture
US5835185A (en) * 1993-09-10 1998-11-10 Kallman; William R. Spring-hinged frame for eyeware
US5900720A (en) * 1993-09-10 1999-05-04 Kallman; William R. Micro-electronic power supply for electrochromic eyewear
US5521654A (en) * 1993-11-02 1996-05-28 Bertieri; Florenza Combination extended natural eyeglasses and corrective eye magnifier
US5722762A (en) * 1996-07-18 1998-03-03 Soll; David B. Illumination device for mounting on the head of a user
USD391380S (en) 1997-06-05 1998-02-24 Brantley Stephen L Head mounted flashlight
DE10117446B4 (de) * 2001-04-06 2007-01-04 Optik Sommer Modulares Beleuchtungssystem, Traggestell und Leuchtmitteleinheit dafür
US8899744B2 (en) 2001-11-07 2014-12-02 Michael Waters Lighted reading glasses
US8152330B2 (en) 2001-11-07 2012-04-10 Michael Waters Lighted reading glasses
US8235524B2 (en) 2001-11-07 2012-08-07 Michael Waters Illuminated eyewear
US8491118B2 (en) 2001-11-07 2013-07-23 Michael Waters Lighted reading glasses
US20040264177A1 (en) * 2003-06-30 2004-12-30 Webber Ray T Head-mounted light
US6848804B2 (en) 2003-06-30 2005-02-01 Ray T. Webber Head-mounted light
US8545012B2 (en) 2005-05-17 2013-10-01 Michael Waters Illuminated eyewear
US20110187989A1 (en) * 2005-05-17 2011-08-04 Michael Waters Illuminated eyewear
US8388164B2 (en) 2005-05-17 2013-03-05 Michael Waters Hands-Free lighting devices
US9526292B2 (en) 2005-05-17 2016-12-27 Michael Waters Power modules and headgear
US9513495B2 (en) 2005-05-17 2016-12-06 Michael Waters Illuminated eyewear
US8979295B2 (en) 2005-05-17 2015-03-17 Michael Waters Rechargeable lighted glasses
US8485682B2 (en) 2007-10-29 2013-07-16 Waters Industries, Inc. Illuminated eyeglass assembly
US9585431B2 (en) 2007-12-18 2017-03-07 Waters Industries, Inc. Lighted hat
US8567945B2 (en) 2009-09-30 2013-10-29 Michael Waters Illuminated eyewear
US8444266B2 (en) 2009-09-30 2013-05-21 Michael Waters Illuminated eyewear
US8653702B2 (en) 2010-03-17 2014-02-18 Hady Saleh Hands-free light controller for headgear mounted illumination device
US20110227509A1 (en) * 2010-03-17 2011-09-22 Hady Saleh Hands-free light controller for headgear mounted illumination device
US9872530B2 (en) 2010-04-30 2018-01-23 Michael Waters Lighted headgear and accessories therefor
US10117476B2 (en) 2010-04-30 2018-11-06 Michael Waters Lighted headgear and accessories therefor
US10716350B2 (en) 2010-04-30 2020-07-21 Michael Waters Lighted headgear and accessories therefor
US11478035B2 (en) 2010-04-30 2022-10-25 Michael Waters Lighted headgear and accessories therefor
US8540364B2 (en) 2010-09-14 2013-09-24 Michael Waters Lighted glasses
US9568173B2 (en) 2011-12-23 2017-02-14 Michael Waters Lighted hat
US9609902B2 (en) 2011-12-23 2017-04-04 Michael Waters Headgear having a camera device
USD682343S1 (en) 2011-12-23 2013-05-14 Michael Waters Lighted glasses
US9526287B2 (en) 2011-12-23 2016-12-27 Michael Waters Lighted hat
US10159294B2 (en) 2012-12-19 2018-12-25 Michael Waters Lighted solar hat
US9717633B2 (en) 2013-03-15 2017-08-01 Michael Waters Lighted headgear
USD770143S1 (en) 2014-05-23 2016-11-01 Michael Waters Beanie with means for illumination
USD824557S1 (en) 2014-12-02 2018-07-31 Michael Waters Flashlight
US10069318B2 (en) 2014-12-02 2018-09-04 Michael Waters LED flashlight with longitudinal cooling fins
US10847985B2 (en) 2014-12-02 2020-11-24 Michael Waters Flashlight with longitudinal cooling fins
US9885465B2 (en) * 2015-05-04 2018-02-06 Ultralight Optics, Inc. Illumination devices
US10791783B1 (en) 2019-05-16 2020-10-06 Waters Industries, Inc. Lighted headgear and accessories therefor
US11206888B2 (en) 2019-05-16 2021-12-28 Waters Industries, Inc. Lighted headgear and accessories therefor
USD949000S1 (en) * 2019-11-29 2022-04-19 Huacai Opto-Electronics Co., Ltd (Yangzhou) Clip for a lamp
US12171293B2 (en) 2021-12-27 2024-12-24 Waters Industries, Inc. Lighted headgear and accessories therefor
WO2024187180A3 (en) * 2023-03-09 2025-01-16 Rutgers, The State University Of New Jersey Dynamic light spectrum absorption eyewear

Also Published As

Publication number Publication date
FR2052892A5 (de) 1971-04-09
DE6925796U (de) 1969-12-04

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