FR2563043A1 - IMPROVED POTENTIOMETER - Google Patents

Abstract

THE POTENTIOMETER ACCORDING TO THE INVENTION INCLUDES AN WRAPPING BODY OF ORTHOGONALLY APLATIA, ONE OF THE LARGE SIDES OF WHICH IS OPEN AND DETERMINES AN OPENING ALLOWING TO LODGE A QUADRANGULAR PLATE 8 IN RESISTIVE MATERIAL, THE INTERNAL PLATE OF THE PORT 8 ELECTRANTITY IN THE FORM OF A CIRCULAR CROWN AT EACH END OF WHICH IS FIXED A TERMINAL CONNECTED TO THE EXTERIOR, THE SAID PLATE BEING RETAINED IN POSITION BY A CLOSING COVER OF THE WRAPPING BODY 1, IN THE FORM OF A QUADRILATER, THIS COVER BEING INSERTED BY SIDE AT ITS CENTER AN AXIAL PROJECT WHICH IS INTRODUCED INTO A CENTRAL OPENING OF THE PLATE CARRYING THE RESISTIVE TRACK.

Description

-63043

IMPROVED POTENTIOMETER

  This patent relates to a new potentio-

  meter of the type currently qualified as adjustable, used to modify the electrical resistance of a circuit at the regulation stage but does not change once the value is established, except in the event of any subsequent modification of the characteristics of the circuit

which the potentiometer is part of.

  The new potentiometer is of the type comprising a track of electro-resistant material fixed by any suitable method to the internal face of a plate of insulating material, which plate is an internal element.

  of the enveloping body of the potentiometer, and also comprising

  also a moving cursor which ensures continuous contact

  between the resistive track and the fixed collector. Is-

  also wind in the potentiometer the terminals

  tact connected to the ends of the track and to the collector as well as a means for moving the cursor by

compared to the resistive track.

  The invention will be described in more detail with regard to

  drawings annexed by way of example in no way limita-

  consistent with the principles set out in the resales

  Dications, and on which: FIG. 1 is a front view of the improved potentiometer, of the side corresponding to the adjustment button; Figure 2 is a transverse view along the plane marked II - II in the previous figure; Figure 3 is a rear view of the improved potentiometer; FIG. 4 is a side view of the improved potentiometer, of the side corresponding to the contact terminals; Figure 5 is a cross section showing the shape of the closure cover; and Figure 6 shows said cover in its role

  means of retaining the terminals of the runway.

  The marks on the drawings correspond to the marks

numbers shown below.

  The enveloping body 1 has an orthogonal shape

  flattened, terminals 2 and 3 which correspond to the ends

  mites of the resistive track and a terminal 4 which corresponds to the protruding collector on one of its short sides. These appendages are an extension of the respective bars, 6 and 7 which are inserted in the notches made

  in the corresponding side face of the body 1.

  Plate 8, preferably of quadrangular shape,

  is housed in the opening formed by the entrance, initia-

  slightly open, corresponding to one of the long sides of the body 1. The internal face of the aforementioned plate carries, fixed to it by an appropriate coating process, the electro-resistant track in the form of an incomplete crown, the ends of which, after its completion, have been endowed

  cash reinforcement deposits and each

  which are connected, thanks to the pressure exerted by the plate whose shape is specially designed for this purpose, the internal ends of the bars 5

  and 6, thus forming the terminals of the fixed resistor.

  The slider 9, made of a bronze alloy to ensure maximum elasticity, conductivity and stability, is provided with tangential appendages 10 which, because of their shape and their elasticity, create

  permanent contact with the resistive track. The cur-

  seur has at 11 a zone in the form of a radial arc which

  maintains permanent contact with a cylindrical crown

  drique 12 which is part of the collector. This collector has a radial extension 13 to an end 13

  inserted into an opening on the side of the body 1 op-

  placed next to where the bars 5, 6 and 7 project.

  The aforementioned terminal 7, 4 is also a derivation of

crown 12.

  The cursor is actuated by means of a movable member 14 of tubular shape, arranged transversely in the body 1 and having a zone 15 inside the body and

  securely supporting the collector, as well as a

  that exterior 16 whose edges are housed in the opening 17 formed by the exterior side of the body 1. A mark 18, for example in the form of arrow, indicates the

  position of appendages 10 of the cursor.

  The opening 19, seen axially in the movable member 14 and being preferably polygonal, is provided to receive a key used to actuate this movable part, although it can in certain cases be actuated manually. At its other end, the tubular member 14a

  a divergent orifice 21 and a collar 22 also poly-

  gonals. This orifice retains the cover 23 of quadrangular shape introduced into the opening o is placed the plate 8, the latter being traversed in its center by the tubular enlargement 24, an accessory of the cover, facilitating the centering and adjustment of

all the parts.

  Inside the cover 23 there are a number of notches 25 and projections 20 and the

  cover 20, having an elastic structure, can exert-

  cer a central pressure by deformation of the four

  angles of the drawing, thereby exerting by this means a

  central Zion which ensures contact between the terminals, 6 and the resistive plate 8. Any element can be integrated into the potentiometer described provided that it does not depart from the scope of the invention.

4 2563043

  IEVEND1CATlO'NS 1. Improved potentiometer characterized in that it comprises an enveloping body of flattened orthogonal shape, one of the long sides of which is open and determines an opening allowing it to house a quadrangular plate (8) made of resistive material, the face internal of said plate (8) carrying an electro-resistant track in the form of a circular crown at each end of which is fixed a terminal (2, 3) connected to the outside, said plate being retained in

  position by a closing cover of the wrapped body

  pant (1), in the shape of a quadrilateral, this cover being inserted by its edges and having in its center an axial projection which is introduced into a central opening

  of the plate carrying the resistive track.

  2. Advanced potentiometer according to the claim

  previous tion, characterized in that the cursor (9)

  rotating forms two curved and elongated appendages (10)

  ticks, permanently bearing on the surface of the resistive track, and also forming an arcuate peripheral zone (11) in contact with the collector, which collector has the shape of a cylindrical crown (12) situated at the bottom of the body cavity enveloping (1) and having an extension in the form of a radial extension which serves to fix the manifold and another extension

  which forms the external connection terminal.

  3. Advanced potentiometer according to the claims

  previous cations, characterized in that the part ac-

  the cursor is made up of a part

  tubular xial (14) introduced into the opening in the second large face of the enveloping body, as well as a cylinder-shaped part adjusting in

the collector and fixing the cursor.

  4. Improved potentiometer according to one quekoeque of claims-

  previous actions, characterized in that the part ac-

  the slider has one of its ends in the form of a discoid extension which is housed in the circular opening and has in its center a polygonal recess used for its actuation, while

  that the other end is shaped like an opening

  ascending meter, protruding from the cover

  quadrangular of the enveloping body.

  5. Improved potentiometer according to any one of the claims.

  tions above, characterized in that there is provided, inside the enveloping body (1), a fixed stop which limits the stroke of the cursor which corresponds to a

  radial projection on the rotating part.