US1941237A - Hand telephone - Google Patents

Description

Dec. 26, 1933. Q WEEBER ETAL 1,941,237

HAND TELEPHONE Filed March 12, 1951 s Sheets-Sheet 1 --In1..ren are-'- UTZTS Masher" U115 5011:1511

Fifi 1 Dw 26,1933." WEEBER I I TAL 1,941,237

I HAND TELEPHONE March 12 1931 3 Sheets-Sheet 2 YIFHJEHIEIFE [m5 washer DUE Euldan '74 Dec. 2 6, 1933. WE E ET AL 1,941,237

HAND TELEPHONE I Filed March 1'2, 11931 s Sheets-Sheet s UTE Emldan Patented Dec. 26, 1933.

U'NlTE o; {s

HAND TELEPHONE om) Weeber, Berlin-Charlottenburg, and ottoi soldan, 'Berlin-Siemens'stadt, Germany,

signors to Siemens & Halske Aktiengesellschaft,;-Wernerwerk siemensstadt, near Berlin,

Germany 7 Application M r n-'12, 1931,SerialNo. 521,394.,

and in Germany June 7,. 1930 a claims; ((11; 179-103) ;-The invention relates to a telephone handset with dial and aims atv an improvement of such handsets in order to make them more suitable for use.

The telephone table instruments with automatic operation, normally used may be divided of instrument has the disadvantage that, in

order to facilitate the operation of the dial the instrument must always be placed as near the user'as possible at which he must twist and bend his body in order to reach the handset or operate. 20. dial.

On. the other hand, the combined microphone and telephone such as used in a hand set, however, is of advantage to the user. The pillar instrument has also the advantage'that thev standing place of the. instrument isof no consequence to the user with regard to theoperation of the dial as the instrument'is taken in the hand for speaking purposes but has. the great drawback that both hands must be used for holding the instrument when speaking as the 3 telephone is not fixed to the apparatus. If, on

the other hand, a hand set with dial is used, the

above-mentioned disadvantages are easily removed order. to allow for a-particularly simple operation.

It has already been suggested to supply telephone handsets with a dial which, however, due

to their awkward handling and operationas well as unhygienic design have found no favour for subscribers handsets, but have been used for special purposes only, e. g., as test apparatus or the like. The objects of the invention reside in improvements of such handsets in order to make them suitable in the first instance for general use.

According to the invention, the dial for this purpose, is located near the microphone mouthpiece onthe side of the ear cap, inside a space limited by the plane of the ear cap. Hereby is achieved that the operation of the handset is considerably simplified in comparison to already known arrangements of this kind and at the same time all other demands which are-put on such a handset, are met to the greatest possible extent. This arrangement of the dial and corresponding design of the casing body makes it possible to hold the handset, while in its normal position, in a comfortable grip and bring it into the-service position for dialling and later into the I speaking positionin an easyandnatural manner Without a change ofvgrip or unpleasant twisting of the handsbeing necessary. The handset is hereby improved, with; regard to its equalized, weight and thus offers a particularly easy and comfortable handling. A furtheradvantagein this arrangement consists in that'the length of 35 the handset can be limited to a minimum with the result that the weight of the instrument is increased only a little. By reason hereofthe. handling of such an instrument is alsomore pleasant and the'cost of production favourably 1 influenced. H ,One embodimentof the invention is shown in the drawings in various, viewsand more completely' described in the following:

.Fig. 1 shows a handset-in side view-and part 7 of the invention, and Fig.5" shows a sectionof the handset in Fig. 4 according to-line C-D.. I

: Figs. 6 and 7 are side views of still further modifications of construction. I

In Fig; l, the numeral 1 represents the body' of the handset and 2 the ear cap of the telephone,

built into the upper casing, butnot shown. The casing body 1 forms a well 3 in its lower end,

which is provided to take the microphone 4 and the terminals 5 for the cord connections of the connecting cord 6. The casing body 1, at the part which forms the mouthpiece for the microphone, is provided with holes '7 as an entrance for the sound waves. The lower hollow in the handset is. terminated by the dial 8.

The casing 3 for the dial 8, in addition to the microphone unit 4 and terminals 5, contains the calling key. The latter .consists of a set of contact springs 10 and the switch pin 11', actuating them, which is so arranged thatit is permanently depressed as long as the handset rests in its normal position and thus an automatic switching operation is achieved. The key and the associated switch member can also, of course, be fitted in the upper casing 2, e. g., in the case of a suspended normal position of the handset. 1 0

In the construction shown in Figs. 4 and 5, the shaft of the finger plate slants with respect to the symmetrical plane of the mouth-piece 9. The advantage obtained by this arrangement is that the movement of the set required to bring the dial in position for operation is exceedingly simple.

In the construction shown in Fig. 6, the lower portion of the handle 12 broadens toward the bottom and forms a casing 13 provided with a mouth-piece for the microphone and dial switch.

When the handset rests in its normal upright position, the lower opening of the casing 13 is entirely closed by the supporting surface, for example, the table on which it stands so that at the same time, dust is prevented from settling on the dial.

In the handset shown in Fig. 7 the lower part differs in construction from that of Fig. 6 in that the dial switch in this case is in the relation to the set as in the construction shown in Fig. l. The arrangement offers a particularly comfortable handling, but requires a different construction of the lower casing body in order to obtain a supporting surface. For this purpose, a projection 16 is provided at the lower part of the casing body 12 which, together with the flattened portion of the casing 13, furnishes the necessary supporting surface for the handset.

In order to increase the stability of a handset of such design, it can be associated with a special base plinth 17, as shown, which forms the support for the handset in its normal position. This base plinth can be covered with felt or the like so that the supporting points for the handset need not be damaged by the careless replacement of the handset. The base plinth 17 can also be fitted to receive theconnecting cord.

As will be seen, the microphone and dial, due to this arrangement, are located in a constricted arrangement in a space to the right of line AB drawn through the plane of the ear cap. The re sult of this arrangement is that, in contrast to such designs of handsets with dial, in which the r latter is located on the back of the handset orin other arrangementson the front of the upper part of the handset and penetrates into the bordering line AB, operation is very much facilitated. In an arrangement with the dial on the back of the handset a turning round of the handset is necessary in order to dial, which is an unwanted exertion. If the dial, as mentioned, is located in the upper part of the front of the handset it is in the way for the user in the listening position due to its location at the ear cap. In the arrangement, according to the invention,

however, these disadvantages are eliminated and.

the dial receives such a favourable position, as will be seen by the embodiment, that a particularly comfortable operation of the dial is achieved without the handset having to be brought into any one special position.

The spacing out of the microphone, mouthpiece and terminals, as will be seen in Figs. 1 and 3 of the drawings to the dial is so arranged that the space, provided for the fitting of these units, projects in the direction of the dial shaft and covers the largest part of the finger plate surface. Hereby a very favourable constricted arrangement is obtained which, in addition, tends to cheapen the production of such handset bodies.

What is claimed is:

1. In a pedestal type hand telephone, a base portion for supporting the hand telephone in an upright position, and an impulse transmitting device in the space surrounded by the material of said pedestal constituting the base portion.

.2. In a pedestal type handtelephone, a base portion for supporting the hand telephone in an upright position, a microphone cell and an impulse transmitting device, respectively, mounted inside the base portion thereof.

3. In a hand telephone, a handle having an upper portion arranged to receive a receiver. unit and having its lower portion bell shaped to form a casing for a microphone unit and impulse transmitting device, said bell-shaped portion also serving as a base for holding the hand tele-' phone in an upright position when not in use.

4. In a unitary structure comprising a pedestal type hand telephone having a receiver and microphone cell mounted therein, a base for supporting the hand telephone in an upright position, and an impulse transmitting device'lying in a plane at substantially right angles to the receiver normally hidden from view by said base.

5. In a hand telephone, a hand portion serving as a casing, a receiver mounted on one end thereof, an opening in the other end, a transmitter mounted in said opening, an impulse sender mounted in the same opening over the transmitter and closing said opening, and another opening in the hand portion adjacent the transmitter.

OTTO WEEBER. OTTO SOLDAN.

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