US3657487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone subset using modular construction
Assignee: International Standard Electric Corp
•
Filing: 1969-09-12
•
Granted: 1972-04-18
•
Expires: 1989-09-12
Abstract
Abstract In a table-type telephone subset all of the substantial individual parts such as the base plate, the housing, the cradleswitch, the number-switch, the electric bell or ringer and the bell domes, as well as the base plate of the number switch and the terminal box are provided with hooks shaped thereto, and with corresponding cutouts or indentations, and are assembled in accordance with the known ''''snap-in'''' technique.
Inventors
- 👤 Gunter Schwanck
- 👤 Heinz Ruster
- 👤 Wolfgang Gruger
- 👤 Ernst Manteuffel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:24
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
112 words
A telephone subset comprising: a plastic base plate, a plastic housing, said base plate and said housing including fasteners integral thereto, the fasteners in said base plate including a slot and a hook-shaped projection, the fasteners in said housing including a flap to engage said slot to provide a hinge-like joint to guide and support the plastic housing relative to the plastic base plate and a recess to engage said hook-shaped projection in a latching action to hold the plastic housing securely against the base plate, a plurality of additional fastening elements in said base plate and said housing, said fastening elements including means for receiving and holding a printed circuit board.
Claim 2
Dependent Claim
112 words
A telephone subset comprising: a plastic base plate, a plastic housing, said base plate and said housing including fasteners integral thereto, the fasteners in said base plate including a slot and a hook-shaped projection, the fasteners in said housing including a flap to engage said slot to provide a hinge-like joint to guide and support the plastic housing relative to the plastic base plate and a recess to engage said hook-shaped projection in a latching action to hold the plastic housing securely against the base plate, a plurality of additional fastening elements in said base plate and said housing, said fastening elements including means for receiving and holding a printed circuit board.
Claim 3
Dependent Claim
28 words
A telephone subset according to claim 1, in which the means for receiving and holding includes a plurality of hooks for engaging recesses in the printed circuit board.
Claim 4
Dependent Claim
44 words
A telephone subset according to claim 1, in which a ringer system is provided, the ringer system including a ringer base plate and means by which the base plate of the ringer system is fastened to the plastic base plate of the telephone subset.
Claim 5
Dependent Claim
71 words
A telephone subset according to claim 3, in which the base plate of the subset is provided with base-shaped projections shaped to support the bell domes in position, and said projections are provided with resilient hook-shaped holding arrangements extending through cut outs provided in said bell domes, whereby the latter, by being subjected to a turn, can be fixed in position at an adjustable distance from the bell hammer or striker.
Claim 6
Dependent Claim
50 words
A telephone subset according to claim 4, in which the hook-shaped holding arrangement at the projection is provided on the bottom side of its free end with an engaging nipple which is aimed at engaging holes or recesses arranged in eccentric circle on the top side of said bell domes.
Claim 7
Dependent Claim
28 words
A telephone subset according to claim 1, in which the base plate of a terminal box is provided with hook-shaped hold members serving to mount screw-type contact blades.
Claim 8
Dependent Claim
33 words
A telephone subset according to claim 6, in which a further hook-shaped hold member is provided in a central position on said base plate, on to which a protective cover may be inserted.
Claim 9
Dependent Claim
52 words
A telephone subset according to claim 7, in which the cover of said terminal box is provided on its top side with a recess engaged by said hold member through which said hold member can be unlatched, and which is capable of being locked or closed by means of a sealing disk.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |