Shutter mechanism for telephone directory

Details Shutter mechanism for telephone directory Shutter mechanism for telephone directory

1989-10-19

1990-08-07

Ng, Jin F.

Telephonic communications

Supervisory or control line signaling

Substation originated

379440, H04M 1274

Patent

active

049474243

ABSTRACT:
A shutter mechanism for a telephone directory that stores telephone numbers to be dialed. The directory has physical spaces for the entry of descriptive labels (e.g. names). The shutter mechanism has a first planar surface for providing these physical spaces. It has a second planar surface overlying the first surface. The second surface is divided into alternating opaque and transparent sections such that the surface having the names can be moved underneath the second surface such that the names can be hidden by the opaque sections or revealed by the transparent sections.

REFERENCES:
patent: Re31649 (1984-08-01), Brodbeck
patent: 4277651 (1981-07-01), Fisher et al.
patent: 4409440 (1983-10-01), Brodbeck
Texas Instruments Collagiate Guidebook, 1987, pp. 1-6, 1-7, 1-9.

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