US3747735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noise reducing covers for teleprinters and other machines
Assignee: Individual
•
Filing: 1969-11-04
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Granted: 1973-07-24
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Expires: 1989-11-04
Abstract
Abstract A cover particularly suitable for use with a teleprinter, including aperture means extending through the cover adjacent each teleprinter key, and means projecting through said aperture means for manipulation by a teleprinter operator located externally of the cover to thereby actuate an associated teleprinter key located within the cover. The inner surface of the cover may carry a sound absorbing material and, such a cover may be used with keyboard-type equipment other than with teleprinters.
Inventors
- 👤 B Frick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:59
CPC Classifications
B; B41; B41J; B41J29/00; B41J29/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
128 words
A sound-insulating casing for a key-board operated machine, said casing having at least one wall facing the machine and which includes means for attenuating the sound-created by the operation of the machine, said sound-attenuating means including a lead plate supporting a sound-insulating layer of cellular configuration directed toward the machine, said sound-insulating layer comprising a sandwich construction of both plane and corrugated paper, the paper providing cells which are disposed to lie with their longitudinal axes perpendicular to the lead plate, the casing including a bottom wall covered by the soundattenuating means, the casing having an upper part connected by a hinge to the bottom wall to allow for a turning of the upper part to a position in which the machine located within the casing is available.
Claim 2
Dependent Claim
128 words
A sound-insulating casing for a key-board operated machine, said casing having at least one wall facing the machine and which includes means for attenuating the sound-created by the operation of the machine, said sound-attenuating means including a lead plate supporting a sound-insulating layer of cellular configuration directed toward the machine, said sound-insulating layer comprising a sandwich construction of both plane and corrugated paper, the paper providing cells which are disposed to lie with their longitudinal axes perpendicular to the lead plate, the casing including a bottom wall covered by the soundattenuating means, the casing having an upper part connected by a hinge to the bottom wall to allow for a turning of the upper part to a position in which the machine located within the casing is available.
Claim 3
Dependent Claim
75 words
A sound-insulating device comprising, a sound-insulating casing enclosing a key-operated machine, an actuating device comprising an elongated member pivotally mounted between its opposite ends on the casing, each end of said actuating device being pivotally connected to one end of a separate, pivotally mounted lever, the other ends of said levers cooperating with opposite end portions of an element of the key-operated machine to thereby actuate said element through the operation of the actuating device.
Claim 4
Dependent Claim
75 words
A sound-insulating device comprising, a sound-insulating casing enclosing a key-operated machine, an actuating device comprising an elongated member pivotally mounted between its opposite ends on the casing, each end of said actuating device being pivotally connected to one end of a separate, pivotally mounted lever, the other ends of said levers cooperating with opposite end portions of an element of the key-operated machine to thereby actuate said element through the operation of the actuating device.
Claim 5
Dependent Claim
55 words
A sound insulating device according to claim 2, wherein the casing is lined by a laminated layer comprising lead sheeting disposed against the walls of the casing, celled corrugated paper disposed against the lead sheeting and a layer of plastic foam disposed against the celled corrugated paper, the plastic foam being innermost toward the machine.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |