Electric heating – Heating devices – Combined with diverse-type art device
Patent
1979-07-06
1981-07-14
Bartis, A.
Electric heating
Heating devices
Combined with diverse-type art device
34 53, 34202, 219218, 219242, 219419, 219502, 219518, 219521, 250221, 250222R, 250224, 312209, 312236, 350 61, 350 66, 433 30, 433 32, H05B 102, A61B 124
Patent
active
042788706
ABSTRACT:
A dental mirror warmer to prevent fogging when the mirror is placed in a patient's mouth includes a housing with a cover having an opening. Below the opening is a heating well to receive the reflective end of the mirror. The well has a stainless steel wall connected to a transformer which supplies high current at low voltage to heat the wall. The supply to the transformer is controlled by a photoresponsive device responsive to insertion of the mirror and a timing circuit which permits current supply for a short heating interval. A temperature sensor shortens the interval when heating cycles are initiated frequently. The photoresponsive device is mounted in the housing in juxtaposition with a light transmissive opening in a wall of the heating well. The photoresponsive device includes a source of light arranged to direct light into the heating well through the opening and a photoresponsive element arranged to receive light reflected from the reflective surface of a mirror inserted into the heating well.
REFERENCES:
patent: 281224 (1883-07-01), Goodsell et al.
patent: 709812 (1902-09-01), Bennett et al.
patent: 1061289 (1913-05-01), Heyder
patent: 1824310 (1931-09-01), Thompson
patent: 1843067 (1932-01-01), De Terra
patent: 1934110 (1933-11-01), Wilson
patent: 2120091 (1938-06-01), Densten
patent: 2180213 (1939-11-01), Peake
patent: 2471884 (1949-05-01), Monnot
patent: 2527049 (1950-10-01), Aagesen
patent: 2606274 (1952-08-01), Spierer
patent: 2611097 (1952-09-01), Stanley et al.
patent: 2616269 (1952-11-01), Reynolds
patent: 2625858 (1953-01-01), Dreher
patent: 2777934 (1957-01-01), Falkenthal
patent: 2856501 (1958-10-01), Kueser
patent: 2999145 (1961-09-01), Espenhain
patent: 3278256 (1966-10-01), Skaller
patent: 3353905 (1967-11-01), Ellis
patent: 3466752 (1969-09-01), Braun
patent: 3637982 (1972-01-01), Reaves
patent: 3643346 (1972-02-01), Lester
patent: 3689735 (1972-09-01), McLeod et al.
patent: 3703634 (1972-11-01), Buckey
patent: 3776694 (1973-12-01), Leittl
patent: 3820251 (1974-06-01), Abernathy
patent: 3961893 (1976-06-01), Russell et al.
patent: 4013886 (1977-03-01), Schmid
Carleton John S.
Senghaas Karl A.
LandOfFree
Dental mirror warmer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dental mirror warmer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dental mirror warmer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2166185