PUBLIC TELEPHONE SET

PUBLIC TELEPHONE SET

PROBLEM TO BE SOLVED: To facilitate assembly work and maintenance check. SOLUTION: A public telephone set 1 is composed of a front case 2, push- buttons 3, a rubber sheet 5, a substrate 6 and a reinforce plate 7. The push- buttons 3 are attached on the front face of the reinforce plate 7 through a c...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: NAGAMI MUTSUMI, KITAZAWA SHINOBU
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC SWITCHES
ELECTRICITY
EMERGENCY PROTECTIVE DEVICES
RELAYS
SELECTORS
TELEPHONIC COMMUNICATION
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To facilitate assembly work and maintenance check. SOLUTION: A public telephone set 1 is composed of a front case 2, push- buttons 3, a rubber sheet 5, a substrate 6 and a reinforce plate 7. The push- buttons 3 are attached on the front face of the reinforce plate 7 through a case 4 for slidably supporting these buttons, and the rubber sheet 5 is attached through the substrate 6 onto the rear face of the reinforce plate 7. The push- buttons 3, the rubber sheet 5 and the substrate 6 are attached onto the reinforce plate 7 and made into the assembly of push-button switches, and this assembly is attached through the reinforce plate 7 to the front case 2. Besides, a printed wiring board 61 is provided with a dialing circuit to be opened/closed by the conductive part of the rubber sheet and a control circuit for controlling the public telephone set 1.