Telephonic communications – Composite substation or terminal
Patent
1990-12-05
1993-06-15
Dwyer, James L.
Telephonic communications
Composite substation or terminal
379429, H04M 100, H04M 102
Patent
active
052205983
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a telephone. In the generally known telephones of this type, the telephone is built into a closed housing and a telephone receiver is incorporated with a microphone into a handset.
The objective of the invention is to create a high-quality telephone that can be manufactured at a lower cost and a more rapid pace, as well as in a flatter design, than has been possible until now. This objective is achieved by the invention according to claim 1.
SUMMARY OF THE INVENTION
The laminate construction makes it possible to manufacture a highly compact telephone from several plastic films that are compressed together. The electronic component assemblies, as well as the keys of the keyboard, can be sealed hermetically by plastic films, thus rendering an actual housing unnecessary. A cover made of plastic film can be designed as desired and can also be stamped, making it possible, for example, to obtain borders and recesses enabling the user of the telephone to quickly find the keys. The plastic film cover, as well as the other plastic film parts, are easily modified, thus making it possible to change the design of the telephone at low cost and to adapt it to specific needs. Additional devices, such as, for example, a calculator or a clock, which can also be operated via a keyboard in the plastic film cover can thus be integrated without any substantial increases in the manufacturing costs. The hermetical sealing of the entire electronics unit, resulting from the laminate construction, increase the telephone's reliability and protects the component assemblies from detrimental exposure, such as water, for example. The other claims result in additional advantageous embodiments. One embodiment of the invention is explained in further detail below on the basis of the drawings. Thus are shown in:
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 a top view of the telephone according to the invention;
FIG. 2 a top view according to FIG. 1, with the top layer of plastic film having been removed;
FIG. 3 a schematic representation of a key; and
FIG. 4 a perspective drawing of the telephone according to the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
A plastic film cover 1, made of polyester, for example, is printed according to both FIGS. 1 and 4. A field 2 denotes the keyboard on which the telephone number to be dialed is entered by punching a keyboard made of plastic film. An additional field 3 denotes a keyboard for a calculator that is constructed on the basis of membrane switches. Finally, a third field 4 refers to keys for an integrated clock. Adjacent to the keyboards the plastic film cover exhibits a transparent area 2a, 3a, and 4a, each revealing a display field, for example, a liquid crystal display. Furthermore, the plastic film cover 1 consists of a field 5 for a microphone arranged beneath it as well as a field 5a for a loudspeaker.
As shown in FIG. 2, keys 6 are arranged beneath field 2 and are activated by touch through the plastic film cover 1. The construction of a key 6 is shown in FIG. 3. When a stamped dome 7 is pressed, two conducting areas 8 and 9 that are arranged in relation to one another are brought into contact. As can be seen, the keyboard is integrated into a plastic film to contact printed circuit. Corresponding keys 10 are intended for operating the integrated clock. Known pressure sensitive keys 11 make it possible to operate a calculator, namely also through the plastic film cover 1.
As is shown in FIG. 2, the plastic films are equipped with punch-outs 12 through 20 that are covered on the front by the plastic film cover 1 and on the back by a basic layer of film. Prepared component assemblies and component parts not shown here are integrated into these punch-outs 12 through 20 and connected to one another via printed boards. How these component assemblies are manufactured is known to the specialist and shall therefore not be explained in this context. The telephone cord not shown here is introduced via a passage 21 leading to the outsi
REFERENCES:
patent: 3564164 (1971-02-01), Prescott
patent: 3941951 (1976-03-01), Engstrom et al.
patent: 4033651 (1977-07-01), England, Jr.
patent: 4232203 (1980-11-01), Lenaerts
patent: 4271333 (1981-06-01), Adams et al.
patent: 4292481 (1981-09-01), Barnes et al.
patent: 4314117 (1982-02-01), Ditzig
patent: 4394545 (1983-07-01), Doyle et al.
patent: 4436965 (1984-03-01), Morse
patent: 4677529 (1987-06-01), Watanabe et al.
patent: 4727246 (1988-02-01), Hara et al.
patent: 4734315 (1988-03-01), Spence-Bate
patent: 4748574 (1988-05-01), Tuchto
patent: 4889980 (1989-12-01), Hara et al.
patent: 4927479 (1990-05-01), Bock
patent: 4961806 (1990-10-01), Gerrie et al.
Chan Wing F.
Dwyer James L.
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