Source: https://patents.justia.com/patent/4018998
Timestamp: 2019-08-17 17:22:34
Document Index: 568304353

Matched Legal Cases: ['art 1', 'art 2', 'arts 1', 'arts 1', 'arts 4', 'art 21', 'arts 21', 'art 22', 'art 21', 'art 21', 'art 22']

US Patent for Communication hand-set foldable for protection Patent (Patent # 4,018,998 issued April 19, 1977) - Justia Patents Search
Justia Patents US Patent for Communication hand-set foldable for protection Patent (Patent # 4,018,998)
Communication hand-set foldable for protection
Feb 3, 1976 - Elmeg Elektro-Mechanik GmbH
A handset for connection to a communication system to serve as peripheral equipment apparatus is constructed as a two-part unit, in which the casing parts are hinged together and when folded down audio and manual access parts and elements are covered, but are accessible when the casing parts are folded up. In the folded up position, the microphone and speaker have particular position to each other for optimizing use as regular telephone or as a loud-speaker phone (walki-talki).
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The present invention relates to communication equipment and more particularly, the invention relates to a peripheral equipment apparatus for testing telephone outlets or the like, and to be connected to a communication network or system. The apparatus, in particular, is a handset, which includes a microphone, a speaker and dial facilities as well as the necessary circuitry for linkage to the communication's network or system.
It is an object of the present invention to construct a piece of peripheral equipment for communication networks or systems, so that it can withstand abusive conditions, rough handling and a rather dirty environment.
FIG. 2 shows the second operating position in which the upper part 1 is foleded off the lower part 2. The microphone and speaker are exposed for audio access and the key board is exposed for manual access. As the two parts are spread in this manner, switch 12 changes position by operation of spring 13. The set is now ready for dialing and communication. All operating parts are freely accessible. Returning for the moment to FIG, 1, the two casing parts have additionally rear walls 1b and 2b, which have a particular angle relative to each other when the parts 1 and 2 are folded down. Now, upon opening the casing up, the two rear walls 1b and 2b abut. Thus, in this second position the two parts 1 and 2 have the angle .alpha. and microphone 4 and speaker 7 are positioned analogous to the usual position of such elements in a regular telephone receiver. Moreover, in this position parts 4 and 7 have a distance a, which corresponds to the distance of similar parts in a regular telephone receiver. Thus, optimum conditions are established as far as attenuation of cross- coupling between receiver and transmitter is concerned, while the parts are conveniently used as a regular telephone.
FIG. 4 shows the unit with upper part 21 folded up; the two positions differ by a relative angle of 180.degree. between the two parts. Upon comparing the two figures, one can see that rear wall portions of the two parts are aligned in the folded down position, so that folding up covers 180.degree. . All operating parts are now accessible, and the unit is ready for operation. First of all, one can see now a switch 26, which corresponds to switch 12 of the unit shown in FIGS. 1 and 2. Switch 26 may also be spring biased, but it may be a slide which is manually operated, not automatically. In either case, switch 26 is held down when parts 21, 22 are folded down, but in the folded up position switch 26 may be pulled out, because it does not automatically assume a pull out position when not spring biased. A second switch 27 is provided for alternatingly connecting the microphone and the loudspeaker to the signal lines. The microphone is located in the lower part 22, behind the slots 25. Analogously, slots 30 in the upper part 21 provide audio access to the loudspeaker in part 21. The lower part 22 contains, in addition, a key board 24 for dialing. The dial keys and the audio access slots are covered when the casing parts are folded down.
1. A handset apparatus for use as a piece of peripheral equipment in a communication system or network, and including a speaker, a microphone and a dial facility in a casing, comprising, the casing being constructed to have an upper casing part, containing the microphone with audio-access thereto being located in a particular surface of the upper casing part, and a lower casing part containing the speaker with audio-access thereto being in a particular surface of the lower casing part, one of the particular surfaces containing also the dial facilities, all of the particular surfaces containing all other manual access facilities, the lower part being hinged to the upper casing part for a first superimposing position, in which the particular surfaces of the casing parts mutually cover each other so that the manual operation facilities and audio-access to the microphone and the speaker are covered accordingly, and for a second folded up position in which the parts have a particular angle for uncovering the said audio-access as well as for access to the dial facility.
5. A handset as in claim 1, the particular angle being 180.degree. or less, but more than 90.degree..
792,307 August 1968 CA
590,514 June 1925 FR
822,251 November 1951 DT
1,212,389 November 1970 UK
Patent number: 4018998
Filed: Feb 3, 1976
Date of Patent: Apr 19, 1977
Assignee: Elmeg Elektro-Mechanik GmbH (Peine)
Inventor: Siegfried Wegner (Peine-Vohrum)
Attorney: Ralf H. Siegemund
Application Number: 5/654,849
Current U.S. Class: 179/103