GB2219101A - Mirror with electrical heater element - Google Patents

Mirror with electrical heater element Download PDF

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Publication number
GB2219101A
GB2219101A GB8902238A GB8902238A GB2219101A GB 2219101 A GB2219101 A GB 2219101A GB 8902238 A GB8902238 A GB 8902238A GB 8902238 A GB8902238 A GB 8902238A GB 2219101 A GB2219101 A GB 2219101A
Authority
GB
United Kingdom
Prior art keywords
mirror
lamina
heater element
laminate
electrical heater
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.)
Granted
Application number
GB8902238A
Other versions
GB8902238D0 (en
GB2219101B (en
Inventor
Joseph Clark
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB8902238D0 publication Critical patent/GB8902238D0/en
Publication of GB2219101A publication Critical patent/GB2219101A/en
Application granted granted Critical
Publication of GB2219101B publication Critical patent/GB2219101B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
    • G02B7/181—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation
    • G02B7/1815—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation with cooling or heating systems
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47G—HOUSEHOLD OR TABLE EQUIPMENT
    • A47G1/00—Mirrors; Picture frames or the like, e.g. provided with heating, lighting or ventilating means
    • A47G1/02—Mirrors used as equipment
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/84—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields
    • H05B3/845—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields specially adapted for reflecting surfaces, e.g. bathroom - or rearview mirrors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/002—Heaters using a particular layout for the resistive material or resistive elements
    • H05B2203/003—Heaters using a particular layout for the resistive material or resistive elements using serpentine layout

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mirrors, Picture Frames, Photograph Stands, And Related Fastening Devices (AREA)

Abstract

A heated mirror 10 comprises a laminate which includes a first glass lamina 12A having a reflective surface and a further glass lamina 12B, an electrical heater element in the form of a resistance wire arrangement 14 being disposed between laminas 12A, 12B and being provided with a timing device 16 which cuts-off the heating element thereby preventing overheating. <IMAGE>

Description

MIRROR WITH HEATER ELEMENT The present invention relates to a mirror with a heater element and more particularly to a mirror with heater element for use in a moist atmosphere.
Known mirrors, when used in a moist atmosphere such as occurs in a bathroom are subject to condensation thereby making viewing an image in the mirror difficult.
This can be hazardous when the mirror is being used to assist, for example, in shaving.
It is an object of the present invention to obviate or substantially mitigate the aforementioned difficulties by providing a new and improved mirror with a heater element.
According to the present invention there is provided a mirror with heater element for use in a moist atmosphere comprising a laminate, a first glass lamina of said laminate having a reflective surface and a further glass lamina being adjacent to said first lamina and forming an outer facing surface of said mirror assembly, an electrical heater element in the form of a fine resistance wire disposed in a serpentine arrangement being embedded between said first lamina and said further lamina and being so arranged, in use, to heat said outer surface of the mirror assembly.
Preferably said mirror includes a cut-off device such as a timer actuated switch which is arranged, after a given time interval, to cut-off said wire arrangement from the source of current thereby preventing overheating.
Preferably also said electrical heating element is supplied by mains current said current being controlled by an on/off switch built into said mirror via a trans former.
An embodiment of the present invention will now be described by example and with reference to the accompanying drawings, in which: Fig. 1 shows a front elevation of a wire heated mirror; Fig. 2 shows sectional view A-A' referred to in Fig. 1.
With reference to Figs. 1 and 2 a mirror 10 in accordance with the present invention is shown. The mirror 10 comprises a laminate, which includes a first glass lamina 12A having disposed thereupon a reflective surface and a further glass lamina. 12B which is adjacent to said first lamina 12A, mounted in a frame 11 made of suitable material such as wood or plastics. The lamina 12B forms the outer facing surface of the mirror 10. An electrical heater element in the form of a fine resistance wire disposed in a serpentine arrangement 14 is located between laminas 12A, 12B and is embedded into the glass which is strengthened or toughened glass. The heating element is further provided with a cut-off facility in the form of a timer actuated switch 16, shown schematically, which cuts-off the heating element thereby preventing over-heating.
An on/off switch 18 built into said mirror 10 controls the supply of current to the electrical heater element from a source such as the mains 20. It will be appreciated that a transformer (not shown) may be required to make safe the amount of current required to operate the electrical heater element. When condensation occurs on the outer surface of the mirror 10 the wire arrangement 14, which is supplied from the mains, is switched on by means of switch 18 so that the resistance wire becomes heated thereby heating the outer surface of the mirror 10 and mitigating the condensation effect.
In a modification a third lamina of glass is provided in the laminate behind lamina 12A for protecting the silvered or mirrored surface of lamina 12A, the silvering being on the surface remote from the wire arrangement 14.

Claims (3)

1. A mirror with heater element for use in a moist atmosphere comprising a laminate, a first glass lamina of said laminate having a reflective surface and a further glass lamina being adjacent to said first lamina and forming an outer facing surface of said mirror assembly, an electrical heater element in the form of a fine resistance wire disposed in a serpentine arrangement being embedded between said first lamina and said further lamina and being so arranged, in use, to heat said outer surface of the mirror assembly.
2. A mirror as claimed in claim 1, including a timer device which is arranged, after a given time interval, to cut-off said wire arrangement thereby preventing overheating.
3. A mirror as claimed in any preceding claim, wherein said electrical heating element is supplied by mains power via a transformer.
GB8902238A 1988-05-27 1989-02-01 Mirror with heater element Expired - Lifetime GB2219101B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB888812570A GB8812570D0 (en) 1988-05-27 1988-05-27 Mirror with heated element

Publications (3)

Publication Number Publication Date
GB8902238D0 GB8902238D0 (en) 1989-03-22
GB2219101A true GB2219101A (en) 1989-11-29
GB2219101B GB2219101B (en) 1992-03-04

Family

ID=10637629

Family Applications (2)

Application Number Title Priority Date Filing Date
GB888812570A Pending GB8812570D0 (en) 1988-05-27 1988-05-27 Mirror with heated element
GB8902238A Expired - Lifetime GB2219101B (en) 1988-05-27 1989-02-01 Mirror with heater element

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB888812570A Pending GB8812570D0 (en) 1988-05-27 1988-05-27 Mirror with heated element

Country Status (1)

Country Link
GB (2) GB8812570D0 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2666475A1 (en) * 1990-08-31 1992-03-06 Glaverbel HEATED MIRROR.
GB2263556A (en) * 1992-01-15 1993-07-28 Verreries Hirtz Sa Heatable mirrors
FR2703207A1 (en) * 1993-03-23 1994-09-30 Snowdon David James Electrical heating device
WO1998006241A1 (en) * 1996-08-02 1998-02-12 Cadif S.R.L. Heat radiating mirror

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114391302A (en) * 2019-08-02 2022-04-22 东京Cosmos电机株式会社 Heater device and imaging device for vehicle

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1387436A (en) * 1971-03-25 1975-03-19 Sprague Electric Co Mirror devices
GB1414905A (en) * 1973-11-23 1975-11-19 Ford Motor Co Motor vehicle rear view mirror assembly
GB1472417A (en) * 1975-10-06 1977-05-04 Ellis W Rear view mirror assembly for automobiles
GB2025867A (en) * 1978-07-25 1980-01-30 Tanner R Improvements in or Relating to Vehicle Mirrors
GB1568665A (en) * 1976-11-18 1980-06-04 Hoy C Mirror assemblies
US4422725A (en) * 1981-03-16 1983-12-27 United Technologies Corporation Method of optimally operating a graphite fiber reinforced glass matrix composite optical article
GB2152701A (en) * 1984-01-06 1985-08-07 Craswell Scient Limited Convex flexible sheet mirror on curved support surface
EP0160198A1 (en) * 1984-03-31 1985-11-06 Bayer Ag Electrically heatable reflection element
GB2183130A (en) * 1985-11-14 1987-05-28 Metagal Ind Comercio Ltda Heated rearview mirror

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1387436A (en) * 1971-03-25 1975-03-19 Sprague Electric Co Mirror devices
GB1414905A (en) * 1973-11-23 1975-11-19 Ford Motor Co Motor vehicle rear view mirror assembly
GB1472417A (en) * 1975-10-06 1977-05-04 Ellis W Rear view mirror assembly for automobiles
GB1568665A (en) * 1976-11-18 1980-06-04 Hoy C Mirror assemblies
GB2025867A (en) * 1978-07-25 1980-01-30 Tanner R Improvements in or Relating to Vehicle Mirrors
US4422725A (en) * 1981-03-16 1983-12-27 United Technologies Corporation Method of optimally operating a graphite fiber reinforced glass matrix composite optical article
GB2152701A (en) * 1984-01-06 1985-08-07 Craswell Scient Limited Convex flexible sheet mirror on curved support surface
EP0160198A1 (en) * 1984-03-31 1985-11-06 Bayer Ag Electrically heatable reflection element
GB2183130A (en) * 1985-11-14 1987-05-28 Metagal Ind Comercio Ltda Heated rearview mirror

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2666475A1 (en) * 1990-08-31 1992-03-06 Glaverbel HEATED MIRROR.
BE1005038A5 (en) * 1990-08-31 1993-03-30 Glaverbel Heated mirrors.
GB2263556A (en) * 1992-01-15 1993-07-28 Verreries Hirtz Sa Heatable mirrors
GB2263556B (en) * 1992-01-15 1995-10-11 Verreries Hirtz Sa Heatable mirrors
FR2703207A1 (en) * 1993-03-23 1994-09-30 Snowdon David James Electrical heating device
GB2277384A (en) * 1993-03-23 1994-10-26 David James Snowdon Electrically heated mirror
GB2277384B (en) * 1993-03-23 1996-10-16 David James Snowdon Electrical heating device
WO1998006241A1 (en) * 1996-08-02 1998-02-12 Cadif S.R.L. Heat radiating mirror

Also Published As

Publication number Publication date
GB8902238D0 (en) 1989-03-22
GB2219101B (en) 1992-03-04
GB8812570D0 (en) 1988-06-29

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930201