LU82607A1 - TELEPHONE HANDSET - Google Patents

Description

BL-2902-EM / mg

8 0 Ù Λ- *% R AND-DUCHÉ DE LUXEMBOURG

..... r ...... y ....... V / du ............... 19. Λ.Ιλ ^ ..? 19 .............. Monsieur le Ministre ___ ...., pKSaâEï de l’Économie Nationale et des Classes Moyennes

Titre delivre: ........................................ 3¾

Service de la Propriété Industrielle LUXEMBOURG

Demande de Brevet d’invention I. Requête

La soc.dite: DeTeWe German Telephone Works and Cable Industry (1) ^ tiengëseïlscîiaft, Wrangelstr. 100, ÎÔOÔ "BërXïn 3 6f R.F.A.

• représentée par MM, E. Meyer s and E. T. Freyllnger. ing. cons. en prop ^ ln, 46, rue du Cimetière, Luxembourg, agissant en qualité de mandataires dépose _____ ce dix juillet mil neuf cent quatre-vingts ________________________ (¾ ^ à .1.5.Î..PP ........ heures, au Ministère de l'Economie Nationale et des Classes Moyennes, à Luxembourg: 1. la présente requête pour l'obtention d'un brevet d'invention concernant:

Telephone handset_________________________________________________________________________________________________________________________________ (4) _ _déclare, en assumant la responsabilité _de cette déclaration, que l ’(es) inventeur (s) est (sont):

Georg Friedrich, Akazienweg 21, 3500 Kassel, R.F.A. ^ 2. la délégation de pouvoir, datée de ........................................ .... le ...............?. ™ ... 9.T..Î:.?. ®9 ............ .....

3. la description en langue ... ......... everywhere ...................... ......... .. de l'invention en deux exemplaires; 4 ............... 1 .______________ planches de dessin, en deux exemplaires; 5. la quittance des taxes versées au Bureau de l'Enregistrement à Luxembourg, le vlagfc-c.inq .... jul.n .... mil .... neuf., .. qent ^ s.tr ^ ~ ylngj | ^ ............................................... .....................................

Jf revendique pour la susdite demande de brevet la priorité d'une (des) demande (s) de '(6) ..................... brevet ... ................. aéposé8 (s) œ ............... Allemagne Fédérale ........... ..................

lQ trois avril rail neuf cent quatre-vingts sous le Ü5 ..... F30T3 ..... 696; ô-3T ...................... ......... ® au nom de ..la déposante ................................. . (9) élit domicile pour lui (elle) et, si désigné, pour son mandataire, à Luxembourg ............................ ............

... 4.6, ...... ^. Ë ..... du ..... ç.ime.tiè.r: e ................ .................................................. .................................................. .................................................. .................. uo sollicite la délivrance d'un brevet d'invention pour l'objet décrit et représenté dans les annexes i susmentionnées, - avec ajournement de cette délivrance à. ............... J ........................... mois.

T'un, des mandataires SëSs—- E. Meyers “H. Procès-verbal de Dépôt

La susdite demande de brevet d'invention a été déposée au Ministère de l'Économie Nationale et des Classes Moyennes, Service de la Propriété Industrielle à Luxembourg, en date du: 10.7.1980 ...... · Pr. Le Ministre à 15.00 heures de l'Economie Nationalere); cteé "Classes Moyennes,

Ai / / • é i! / li \ zAz- A GS007 II '! / / rj priority claim one

Patent application filed in, A Germany on 3.4.1980 under Ç-— P 30 13 696.0-31 / y, --1 ^ · -—

PATENT APPLICATION

DeTeWe

Deutsche Telephonwerke and Kabelindustrie Aktiengesellschaft

Wrangelstrasse, 100 1000 Berlin 36 Germany

Telephone handset i - 2 -

Telephone handset

The invention relates to a telephone handset, preferably composed of two housing parts, the housing parts of which have, at their ends, shapes for receiving acoustic transducers.

The telephone handset is a mostly made of thermoplastic hollow body, in which the middle part preferably serves as a handle during use. Through the cavity of the handle part 10, e.g. the electrical wires for the earphone connection. Due to the shape and material of the complete handset, acoustic couplings (whistles) can occur in the operating state, e.g. when the handset has been placed on a table top $ 1. This creates an acoustic bridge.

Various measures have become known in order to counter this deficiency in telephone handsets, e.g. Vibration-damping inserts for receiving the acoustic transducers, or a closed cavity serving for vibration damping 20 as a sound funnel behind the speech capsule.

Furthermore, from US Pat. No. 2,190,467, a two-way handset with a solid handle is known, the ends of which are shaped for hearing and speaking capsules. The speaking capsules and hearing capsules are held on the grip part by pressing parts, which are preferably screwable. Part of the handle

There are chambers in the handset that have openings. In the description, mathematical relationships are established which relate the film contents of the chambers and the acoustic feedback.

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Furthermore, from DE-PS 24 55 185 an arrangement for reducing the acoustic feedback in telephone handsets is known which mechanically enlarges the surface of the lower shell half of a two-part handset between 5 speech and earcups! 'that the geometric reflection laws, which stimulate feedback, are absorbed and / or reduced in intensity by scattering. Although the widening of the grip area under v 10 simultaneously extends the shape of the handset, the; in a known version a more brush-like

Form compared to known bone-shaped handsets, the tendency to whistle is greatly reduced, but this handsets is temporarily placed on a smooth surface, Î 15 e.g. Tabletop, stored, acoustic feedback can occasionally occur due to the shape.

The invention is based, with telephone! hand-held acoustic feedback through suitable

To avoid means.

20 The invention achieves this by the in the labeling! * part of claim 1 highlighted measures.

Another advantage of the invention is that the Fem-I speaking handset can be easily gripped by human hands of different sizes.

I 25 In the drawing, FIGS. 1 to 5, the invention is shown by way of example, the same parts bearing the same reference symbols. The speech or hearing capsule is not shown because they are not essential to the invention.

Fig. 1 shows a side view, 30 Fig. 2 shows the view from above and

Fig. 3 is a bottom view of the remote handset, which is preferably made of; jf'ä, two housing parts, the lower 1 and the upper 2, is composed.

| - 4 -

The lower housing et part 1 of the telephone handset has shapes 6, 7 for receiving the hearing or speaking capsule. Preferably, in the lower housing part 1 there is a shape 8 for the connecting line 9, which are in the area of the shape 7 for the

Speech capsule is located. The upper housing part 2 is coherent in the area of the edge 12, e.g. non-positively or positively, connected to the lower housing part 1. The upper housing part 2 also has formations 13 »10 131 for receiving the speech or horoscope capsule, which

Complement the formations in the lower housing part 1 to accommodate the capsules. The formations 13 »131 are connected to one another by semitubular formations 10, 11, as a result of which a perforation 3 is formed in the housing part 2.

15 The formations 6, 7 of the lower housing part 1 are connected to one another by two semitubular formations 100, 110, as a result of which a perforation 3 is formed in the housing part 1. Both housing parts 1, 2 can be inclined relative to a straight line 14 by angular dimensions 4, 5, which are selected according to 20 ergonomic requirements. The half pipes. 10, 11; 100, 110 have any cross-section, but preferably the same, e.g. round, oval.

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In the assembled state of the body for the telephone handset, the half tubes 10, 11; 100, 110 25 two ears and also the large perforation 3- In the operating state of the telephone handset, the acoustic waves which stimulate the acoustic kick couplings are influenced by the perforation 3, so that the whistling tendency and the whistling are prevented. It is also advantageous for the invention that the sub-handle part of the remote handset is easy to handle for different sized human hands.

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Claims (6)

1. Telephone handset, characterized in that a body, preferably consisting of two housing parts (1, 2), has formations (6, 7 »$ 13, 131) at its ends for receiving acoustic Vandlem * and between the formations (6, 7 »13 * 131) * a large perforation (3) is formed in such a way that the formings (6, 7; 13, 131) are connected by 'two tubes (10, 11; 100, 110). 10th 2) Telephone handset according to claim 1, characterized in that the two housing parts (1, 2) are joined together to form a hollow body, i 3. Telephone handset according to claim 1 and 2, characterized in beiaef. characterized in that the lower housing part (1) a ~ the 15. Includes molding (8) through which / connecting line (9) 7 is guided. I. ^ 4) Remote telephone handset according to claim 1, characterized thereby | / Draws that the body for the hands-free handset-y has an angle (4, 3) for ergonomic reasons, in particular at the ends 20, which are shaped to accommodate acoustic Vandlem. 5. remote telephone handset according to claim 1, characterized in that two tubes are formed by half tubes (10, 11; 100,; and 110. 25 6) Remote handset according to claim 4 and 5 », characterized in that the tubes (10, 11; 100, 110) have the same or any cross-section. e o * / • fo »| «= R - 2 -