Foods and beverages: apparatus – Cooking – Automatic control
Patent
1998-04-27
2000-01-18
Simone, Timothy
Foods and beverages: apparatus
Cooking
Automatic control
99329P, 99329RT, 99385, 99389, 99391, 219492, 219521, 426241, 426466, 426520, 426523, A47J 3708
Patent
active
060149256
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to toasters comprising a housing enclosing a toasting chamber provided with at least one heating resistance and in which is movably mounted a bread carrier movable between at least one ejection position and a toasting position in which it is retained by an electromagnetic actuating device comprising a control winding with a hollow support which is secured to a plate mounted fixedly in the housing and carrying at least the electrical connection members and which surrounds a magnetic core, as well as a movable armature adapted to retain the bread carrier in its toasting position when the winding is fed.
BACKGROUND OF THE INVENTION
In toasters of this type, the electromagnetic actuating device is mounted on a plate comprising electrical connection members such as printed tracks as well as electrical and electronic components for controlling the supply of the heating resistance and the actuating winding. These tracks or printed circuits are generally obtained by photoengraving on a relatively thin insulating plate, and are therefore very sensitive to any mechanical stresses exerted on them particularly during implantation of the winding/core assembly of the actuator and of the direct action of the wires to the winding on said tracks. Moreover, during operation of the bread carrier, repeated shocks of the movable armature on the magnetic core and the force of traction of this movable armature exerted on the core against the magnetic force, act on the winding and the connections and separate the printed tracks from the supplemental constraints.
These different constraints give rise particularly to microcracks in the tracks which eventually lead to interruption of the electric circuits.
SUMMARY OF THE INVENTION
The invention has for its object to overcome the above drawbacks and thereby to provide a toaster whose actuating device does not give rise to any damage to the plate no matter what the constraints of manufacture, mounting and operation.
According to the invention, the magnetic core is mounted mechanically independent of the support of the winding and of the plate, and is secured to a portion of the housing.
Thus, it will be understood that the mechanical separation of the magnetic core from the support of the winding isolates this plate particularly from the moving pieces and therefore eliminates the transmission of stresses, exerted by the bread carrier on the core, to the plate, thereby avoiding its damage.
The invention also relates to a process for mounting such an electromagnetic actuating device in the housing of the toaster which is perfectly adapted to mass production.
BRIEF DESCRIPTION OF THE DRAWINGS
The characteristics and advantages of the invention will become apparent from the following description, given by way of non-limiting example, with reference to the accompanying drawings, in which:
FIG. 1 is a fragmentary vertical cross-sectional view of a toaster according to the invention and illustrating an electromagnetic actuating device;
FIG. 2 is a fragmentary vertical cross section on a larger scale on the line II--II of FIG. 1, of the actuating device;
FIG. 3 is an enlarged view of a detail of the actuating device of FIG. 1, showing the movable armature.
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows in fragmentary view a toaster comprising a housing 1 enclosing a toasting chamber 2 provided with at least one heating resistance 3 and in which is movably vertically mounted a bread carrier 4, between an ejection position (not shown) and a toasting position, shown in FIG. 1, in which it is retained by the electromagnetic actuating device 5. This actuating device comprises in known manner a control winding 6 with a hollow support 7 which surrounds a magnetic core 8, and a movable armature 9 adapted to retain the bread carrier 4 in its toasting position when the winding 6 is supplied and thereby to be pressed against the magnetic core. As illustrated, the magnetic core has a general U shape and comprises to this end a base 10 carrying
REFERENCES:
patent: 3956978 (1976-05-01), Borley
patent: 5018437 (1991-05-01), San Juan
patent: 5044263 (1991-09-01), Birkert et al.
patent: 5304782 (1994-04-01), McNair et al.
patent: 5771780 (1998-06-01), Basora et al.
Arnedo Julian
Basora Sanjuan Antonio
Moulinex (S.A.)
Simone Timothy
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