Flexible or portable closure – partition – or panel – Plural and/or with rigid closure – Diverse types
Patent
1996-07-23
1998-06-23
Purol, David M.
Flexible or portable closure, partition, or panel
Plural and/or with rigid closure
Diverse types
1601761R, 49 64, E06B 332
Patent
active
057691428
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention concerns devices for operating blinds. Problems of heat insulation in buildings is becoming of increasing importance particularly because of the rising cost of the types of energy utilizable for heating. Efficient insulation in any case enables a big reduction to be made in the quantity of energy needed to maintain a comfortable temperature inside the home.
One of the greatest causes of heat loss in a house is represented by its window area. Heat dispersed through windows mainly depends on losses by convection, when air from outside mixes with inside air through badly fitting window frames, and on losses by conduction when air inside is cooled against glass chilled by low outdoor temperatures. Heat insulation can be substantially improved by installation of double glazing when, because of the air-filled cavity between the two panes, heat loss is greatly lessened. An even more noticeable improvement is obtained by changing from single glazing to double glazing with a vacuum in between.
The presence of blinds, called venetian, greatly complicates the problem as, for reasons of bulk and for a number of advantages, such as there being no need for maintenance, protection against dust and grease and against possible accidental damage, it is preferable to place the blind inside the cavity formed between two panes of glass. This type of blind can in fact be worked by devices outside the blind and operated inside the room.
To assure mechanical connection between the blind and the operating devices, the connecting parts must enter the sealed chamber formed between the panes of glass.
To keep the cavity sealed elastic packing has to be used in order to permit hermetic closure independently of any movements made by connecting mechanisms.
Over a period of time this packing wears out and air from outside penetrates inside the cavity greatly lessening the advantages associated with double glazing. The above invention avoids these drawbacks as will be explained below.
SUMMARY OF THE INVENTION
Subject of the invention is a device for working venetian blinds within a sealed chamber comprising two panes of glass, an intermediate frame to support said panes, a horizontal shaft to carry and work the blind inside the sealed chamber formed between the panes and a mechanism for rotating said shaft.
The mechanism, now to be referred to as internal, for rotating the shaft, is connected to another mechanism, now to be referred to as external, for working the parts outside the sealed chamber by means of a magnetic connection whose lines of force act through one of the glass panes. The magnetic connection consists of a disc carrying permanent magnets fixed to one end of a shaft forming part of the internal mechanism for rotating the shaft to work the blind, placed a short distance away from the inner face of one pane of glass.
Said disc is opposite to a disc carrying permanent magnets fixed to one end of a shaft forming part of the external mechanism and placed at a short distance from the outer face of said pane of glass.
The two shafts, respectively part of the external and internal mechanisms, are coaxial.
The permanent magnets on the discs in the internal and external mechanisms have different polarities in relation to a diameter.
In the middle of each of said discs in the internal and external mechanisms is a pin with a rounded end and the two pins make contact with the opposite surfaces of the glass reacting against reciprocal magnetic attraction.
The internal mechanism preferably comprises a gearing-down unit formed of a rotor which, by means of pins parallel to its axis and placed at equal radial and angular distances, carries equal satellite pinions that simultaneously mesh with a crown gear fixed coaxially to the rotor, included in the body of said mechanism, and with circumferential toothing on a small coaxial shaft.
The rotation impressed on said small shaft is therefore transmitted to the rotor at a divisor ratio corresponding to that between the teeth on the small shaft and o
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patent: 3153819 (1964-10-01), Bond
patent: 3201832 (1965-08-01), Hordis et al.
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patent: 3722572 (1973-03-01), Hall
patent: 4588012 (1986-05-01), Anderson
patent: 4723586 (1988-02-01), Spangenberg
patent: 4817698 (1989-04-01), Rossini et al.
patent: 5396944 (1995-03-01), Rossini
Pellini S.R.L.
Purol David M.
Striker Michael J.
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