US2212315A

US2212315A - Radioelectric control device

Info

Publication number: US2212315A
Application number: US205190A
Authority: US
Inventors: Bollack Lucien Armand
Original assignee: Individual
Current assignee: Individual
Priority date: 1937-05-15
Filing date: 1938-04-30
Publication date: 1940-08-20
Anticipated expiration: 1957-08-20
Also published as: FR832828A

Description

s- 20, 1940. A. BOLLACK 2,212,315

RADIOELECTRIC CONTROL DEVICE Filed April 30, 1938 Lucien Armand 5HoeJ1 IN VENTO It 4a. AT'T\ Patented Aug. 20, 1940 warren STATES PTENT OFFICE Application April 30, 1938, Serial No. 205,190 In France May 15, 1937 3 Claims.

The present invention relates to apparatus of the kind including electric circuits, and in particular oscillating circuits in combination with electronic systems, and it is more especially con- 5 cerned with radio-electric apparatus, such as radiophone or television receiving sets, electroacoustic apparatus such as pick-ups, and, generally speaking, all apparatus including electric circuits the characteristics of which are to be 10 varied by means of adjustment devices.

The object of the present invention is to provide apparatus of this kind which is better adapted to meet the requirements of practice, and in particular which is easier to adjust accurately 15 and improved of appearance.

The essential feature of the present invention, relating to apparatus of the type above mentioned the frame of which is combined with cases or the like including movable elements,

such. as doors, consists in interconnecting the movements of said movable elements with those of at least some of the devices for varying the electrical characteristics of said apparatus, or of the electronic systems cooperating with said circuits. v

According to another feature of the present invention, relating to radioelectric receivers, I provide the apparatus with a lamp-shade movable with respect thereto and the displacements 30 of which control at least some of the adjustment devices, as above explained.

Preferred embodiments of the present invention will be hereinafter described, with reference to the. accompanying drawing, given merely by way of example, and in which:

Figs. 1, 2 and 3 are, respectively, an elevation partly in section, a section on the line IIII of Fig. 1, and a plan view, of a radiophonic receiver according to the invention;

i Fig. 4 is a view, similar to Fig. 2, of a modification;

Fig. 5 is a partial section of another modification.

. My apparatus includes, in the usual manner:

4 (a) A radio-electric system including a plurality of electronic tubes l in combination with electric circuits the characteristics of which can be varied by means of suitable adjustment devices, the whole being carried by a frame 2 and 50 combined with a loud speaker or diffuser 3;

and

(b) For covering this system, a case or the like 4, of wood, synthetic resin, or another suitable material, including in

particular doors

5, 6,

55 these movable elements being intended toper- (Cl. ZED-14) mit of having access to the inside of the case or to control the emission of acoustic waves.

Now, according to my invention, these two parts are combined in such manner that the movements of at least some of the movable 5 elements of the second part are interconnected with those of at least some of the adjustment devices included in the first part of the apparatus so that these movable elements can replace the usual control knobs of radio receivers.

Supposing for instance that the apparatus includes two movable elements, constituted for instance by doors 8, which in the drawing are shown in front of the loud speaker (although this showing has no limitative character), it 15 seems advantageous to proceed as follows:

One of these doors, to wit 5, is combined with the sound volume control device, diagrammatically shown at l, with the contacting device or switch 8 which permits of starting the apparatus.

The other door, to wit 8, is connected with any of the other adjustment devices, such as the variable condenser or condensers for tuning the receiver, the wave range switch (although it is advantageous to control these two devices through another movable element which will be hereinafter referred to) or one of the devices for adjusting tonality, sensitiveness, selectivity, and so on, reference character 9 being supposed, on the drawing, to apply to the tonality control device.

The control of these devices by means of said doors may be effected as follows:

According to the arrangement disclosed by Figs. 1 to 3, the axes about which the doors are pivoted are mounted in line with the respective axes of said devices upon which would be fitted, in the conventional construction, the control knobs, and these last mentioned axes are rigid with the rotating elements l2 of the doors. Of course, in this case, the position of these adjustment devices on the frame is chosen especially in order to permit this mounting.

Alternatively, I may have recourse to any kinematic connection between the parts E2 of the doors and the parts to be controlled, and in this case the adjustment devices may be mounted at any place on the frame. This second mentioned arrangement permits of obtaining, through these connections, any reduction or amplification of the movement of the doors.

The kinematic connections may be of any kind, such as spur or bevel gears, combinations of levers, chains, cables, wires, and so on. On the drawing, I have shown pinions H), II between one of the doors and the corresponding adjustment device, and pinions of the same kind l3, i l for the movable element 15 which will be hereinafter referred to.

Of course, when the doors are in particular intended to give a passage for the sound waves, the system above described is prefen'ably arranged in such manner that the useful dislacement of said doors begins only when they have reached a position sufiiciently opened for avoiding any risk of interfering with the diffusion of said waves. This result may be obtained in any suitable manner, for instance by means of a unilateral drive by mere contact under the eifect of a spring, with a stop disengaging the part to be driven from the door when the latter is moving along the part of its path which is to correspond to no movement of said driven part, or by means of a clutch device which, being interposed between the part to be driven and the door, would be brought into operation at the beginning of said useful displacement of the door.

In the preceding description, I have considered, as movable elements playing the part of con- I trol members,

doors

5, 6. But it should be well understood that I can make use of all other movable elements. In particular, I may employ the following arrangement, which can, eventually, be used alone.

With this arrangement, I combine, with a radio-electric apparatus (radiophony, television, etc.) a device acting as a shade, in combination with at least one light source carried by the apparatus, and this shade is mounted in such manner as to be able to move in operative connection with at least one of the adjustment devices of the apparatus.

In particular, I have found that it is advantageous to control, by means of said shade E5, the tuning device of the apparatus, consisting for instance of the simple or multiple variable condenser l 6.

For this purpose, shade i is pivotally mounted about'a vertical or oblique axis, being for instance rigid with a pivot l7 journalled in a bearing l3. This pivot l'l isconnected to the shaft IQ of the condenser as above explained, either directly, with eventually the interposition of a flexible joint 20, or through kinematic connecting means, such for instance as those above mentioned, to wit pinions l3, l4.

Such an arrangement is particularly advantageous because it permits, owing to the large peripheric surface of the shade, of giving shaft ii, and therefore shaft I9, angular displacements as small as possible, which ensures a high accuracy.

This accuracy is further increased by marking on the shade itself the positions corresponding to the various emitting stations. These indications are marked for instance at 2!, on a zone of sufficient height of the periphery of said shade.

This zone may extend either over a part of the periphery of the shade, especially when said shade is rigidly connected with the condenser (Figs. 1 to 3) or over the Whole of said periphery, when a kinematic connection, such as l3, M (Fig. 4) ensures a reduction of the movement of the shade. I

An equivalent solution would consist in marking the stations on a circular hand 2E advana sun and plant wheel system or any other equivalent device 22.

But it should be well understood that the indications of the names of the stations might be disposed on any other movable part (drum, disc, etc.) provided at any point of the apparatus and controlled through any kinematic means.

Concerning the shape to be given to the shade, and also the matter of which it should be made, I have found that it is advantageous, at least concerning part 2! or 2& on which the stations are marked, to make it of a transparent or translucent material, the illumination being obtained either from a main light source '23 (Figs. 2 and 4) coacting with the shade, or from an auxiliary source 25, cut in a fixed support :26.

According to another feature of the present invention, at least one of the movable elements above mentioned is caused to coact with at least two adjustment devices.

For instance, supposing that this feature is applied to the shade above described, the latter is combined on the one hand to the tuning condenser l8 and, on the other hand to the wave-length switch 21.,

For this purpose, as shown by Fig. 4, in addition to its rotary movement, the shade is given an axial displacement, this last mentioned dis-. placement being made use of for controlling switch 2'l through anysuitable means, such as a lug 29 carried by a lever 28 and cooperating with shaftv Hi. In this case, said shaft has its lower end of square section so as to be able to slide in pinion l3.'

When the names of the stations are carried by an annular element, such as 2! or 2H, which is also given the same axial displacement as the shade, the stations of the various ranges of wave-lengths (two ranges being provided in the example illustrated by the drawing) may be marked on two (or. more) superposed bands, so that, according to the position of the whole, the stations of the range that is chosen appear through aperture 25.

A handle or knob 30 may be provided for facilitating the operation of the shade for moving it axially. Furthermore, the various positions of utilization may be stabilized by means such as a spring ball 33 coacting with grooves 3!, 32.

The operation of the device according to the invention results from the above description.

The chief advantages of the arrangement according to the invention are the following:

Adjustment of the set is more accurate.

The external appearance is improved because at least some, and sometimes all, of the knobs or other control members are-eliminated.

The control of the apparatus is eifected with- I out any risk of mistake.

If the apparatus consisted of a radio-electric phonograph or pick-up, one of the doorswould control the switching on and off and the power of the electric circuits and the other door would control the starting of the motor driving the disc.

While I have, in the above description, disclosed what I deem to be practical and efficient embodiments of the present invention, it should be well understood that I do not wish to be limited thereto as there might be changes made in the arrangement, disposition, and form of the parts Without departing from the principle of the present invention as comprehended within the scope of the appended claims.

What I claim is:

1. A radio receiver set comprising, in'combination, an electrical receiving installation including a loud-speaker and volume control means, a housing enclosing said installation and having a movable door disposed in its closed. position in front of said loud-speaker, and means mechanically coupling said door to said volume control means so as to increase the volume when said door is opened and to decrease the volume when the door is closed.

2. A radio receiver set comprising, in combination, an electrical receiving installation including a loud-speaker and volume control means, a housing enclosing said installation and having a movable door disposed in its closed position in front of said loudspeaker, and means mechanically coupling said door to said volume control means so as to increase the volume when said door is opened and to decrease the volume whenv the door is closed, said coupling means starting to actuate said volume control means only after said door has been opened to a predetermined extent.

3. A radio receiver set comprising, in combination, an electrical receiving installation including a loud speaker, volume control means, and tone pitch control means, a door including two independently movable wings, both disposed in their closed positions in front of said loud speaker, means mechanically coupling one wing of said door to said volume control means so as to increase the volume when said wing is opened and to decrease the volume when said wing is closed, and means mechanically coupling the second wing of said door to said tone pitch control, so as to raise the tone pitch when said second wing is opened and to lower the tone pitch when said second Wing is closed.

LUCIEN ARMAND BOLLACK.