DE612628C - Telephone handset with number switch - Google Patents

Description

GERMAN EMPIRE

ISSUED ON APRIL 30, 1935

REICH PATENT OFFICE

PATENT LETTERING

CLASS 21a ³ GROUP 16 ω

Siemens & Halske Akt.-Ges. in Berlin-Siemensstadt *) telephone handset with. Number switch

Patented in the German Empire on June 8, 1930

The invention relates to a telephone handset with a built-in number switch and seeks to improve such handsets to make them suitable for general telephone use close.

There is a difference in common telephone desk stations for self-connection operation There are mainly two types, one being the apparatus with a number switch built into the housing and detachable microphone and on the other hand the so-called American column station, in which the microphone, the telephone and

t5 the number switch combined into one device are, and which can be grasped by the telephone subscriber by hand and brought into a comfortable speaking position. Both types of stations are still in terms of ease of use and handiness imperfect. The first mentioned type of station has the disadvantage that for the purpose of good operation of the number switch, the station must always be easily accessible to the operator must, otherwise the operator has to turn and turn around the handset to reach or to press the number switch. The pillar station has against it although the advantage that the location of the device to the operator with consideration the operation of the dial is irrelevant because the apparatus is used to speak is taken in hand, however, has the grave deficiency that one, there the phone is not firmly attached to the set, use both hands to operate the set must use. On the other hand, if you use a handset with a number switch, leave it alone the disadvantages listed above in order to achieve a particularly simple Eliminate operation completely.

It has been proposed to use telephone handsets with a number switch to be provided, which is either on the back of the handset or, if arranged on the speaking side, a such a position on the upper or middle handle part of the handset assumes that the detection the apparatus is made more difficult. Telephone handsets have also become known where the number switch is installed on the side facing the user below the microphone during use, in such a position that the length of the handset is the diameter of the Number switch enlarged. The apparatus is hereby unfavorably lengthened, that is unwieldy. This arrangement also has the disadvantage that the finger washer of the number switch Due to its position in relation to the microphone housing, it is hit by the breath of the user when talking to the microphone, what is unsanitary.

The invention aims to improve such handsets in which the number switch near the microphone

*) The patent seeker indicated the following as the inventors:

Otto Weeber in Berlin-Charlottenburg and Otto Soldan in Berlin-Siemensstadt.

speak is arranged on the side assigned to the user during use, and consists in that the number switch is in such a position below the microphone interactions in the housing of the handset assumes that when discussing the microphone, the finger disc of the number switch turned away from the mouth of the user. This achieves in a simple manner that the finger disc is not exposed to the breath of the user in the speaking position with comfortable grasp of the device. He can be brought into the operating position for dialing and then in the speaking position in an informal manner without doing this a change of grip or uncomfortable twisting of the hand becomes necessary. Another The advantage is that the length of the handset despite the number switch can be kept to a minimum, so that the weight of the apparatus is only marginally increased and better balanced.

With the aid of two exemplary embodiments illustrated in several views of the drawing the invention is described in more detail.

Fig. Ι shows a handset designed according to the invention in side view and partially cut.

Fig. 2 shows the lower part of the handset seen from above.

Fig. 3 is a side view of the lower part of the handset, and Fig. 4 illustrates a plan view of the lower part of the handset with the housing sectioned in FIG Direction of the number switch axis with an indicated microphone and terminals.

In the figures, 1 denotes the body of the handset and 2 denotes the closing shell of the telephone, not shown, installed in the upper case. The case body 1 forms at its lower part a cavity 3 for receiving the microphone 4, des Number switch 8 and the terminals 5 for the cord connections of the connecting cord 6. The housing body 1 is at its entrance 9 for the microphone forming part provided with recesses 7 for the passage of the sound waves. Closed is the lower cavity of the handset by the number switch 8. This arrangement has the consequence that in contrast on such versions of handsets with number switches, in which the latter is on the back of the handset or in the case of an arrangement at the front on the upper part of the handset, the operation is much easier will. With an arrangement of the number switch, on the back of the handset When operating the number switch, one turn of the handset is used to set the number switch required, which is unfavorable. But if the number switch is in the upper part of the front of the handset, as a result of its position in relation to the earpiece, it hinders the operator in the listening position. In the arrangement according to the invention, however, these disadvantages do not apply. Therefore, like the embodiment can be seen to get such a favorable location that allows a particularly convenient operation of the number switch without the handset being in any particular position to operate the number switch. must take. As can also be seen from the exemplary embodiment is, the number switch 8 occupies such a position for objection 9 that his finger washer from the mouth of the Is turned away from the speaking, whereby the axial direction of the number switch is at an angle greater than 90 ° with the speaking direction, forms. This angle can also have a different size. . It is essential that his The focusing screen is turned away from the speaker's mouth when discussing the microphone. In this way it is avoided that the wet breath of the speaker reaches the number switch, but also at the same time achieved that only a slight backward tilting of the handheld device is sufficient to access the finger disc of the number switch 8 for the »actuation-; to make borrowed. This training also results in an easy-to-manufacture shape, since the The axis of the number switch 8 lies in the plane of symmetry of the entrance 9.

The spatial arrangement of the microphone 4, the sounding point 7 and the connection terminals 5 is, as can be seen from FIGS. 1, 3 and 4 of the drawing, to the number switch so chosen that the space required for this purpose to accommodate these parts of the apparatus in the direction the number switch axis projects most of the finger disk surface. This makes it an extremely cheap one A compact arrangement achieved, which helps to make the manufacture of such handset body cheaper.

Claims (3)

Patent claims: ι. Telephone handset with number switch, which is stored on the side assigned to the user during use in the vicinity of the microphone input, thereby characterized in that the number switch (8) such a position below the microphone input (7) in the housing of the handset occupies that when discussing the microphone (4) the finger disc of the number switch (8) is turned away from the mouth of the user. 2. Telephone handset according to claim i, characterized in that the Housing (3) to hold the number switch (8) of the microphone (4) and the cord connection terminals (5) as well as the finger disc of the number switch to form the microphone input (7) (8) covered laterally. 3. Telephone handset according to claim 2, characterized in that the The angle between the number switch axis and the center plane of the entry point is 90 ° or more. 1 sheet of drawings