US179531A - Improvement in key-boards for type-writers - Google Patents
Improvement in key-boards for type-writers Download PDFInfo
- Publication number
- US179531A US179531A US179531DA US179531A US 179531 A US179531 A US 179531A US 179531D A US179531D A US 179531DA US 179531 A US179531 A US 179531A
- Authority
- US
- United States
- Prior art keywords
- key
- type
- writers
- boards
- improvement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000004744 fabric Substances 0.000 description 8
- 241000289429 Philander Species 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000717 retained Effects 0.000 description 2
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
- H01H3/12—Push-buttons
- H01H3/122—Push-buttons with enlarged actuating area, e.g. of the elongated bar-type; Stabilising means therefor
- H01H3/125—Push-buttons with enlarged actuating area, e.g. of the elongated bar-type; Stabilising means therefor using a scissor mechanism as stabiliser
Definitions
- I Qvmvog N, PETERS, PHDTO-LITHOGRAFNER WASHINGTON, D. C.
- A represents the key-board of a bholes & Glidden or other typewriter
- the stem of the key is made longer than usual in type-writers, for the purpose of passing through a number of alternating layers, 0, of cloth, rubber, and similar fabrics, which are stretched on and secured to the key-board,
- the layers B are perforated like the keyboard, to provide for the sliding motion of the stems of the keys.
- Tightly-fitting washers D are placed around the stem intermediately between the layers B, and are retained by the same, so as to admit the motion of the key, but without admitting the escape of the clicking or other sounds made thereby.
- the Working of the keys on the key-board is thus accomplished in perfectly noiseless manner, so that the type-writer may be employed Without annoyance for stenotypic purposes in courts, churches, and other places, the type-writer casing being, furthermore, covered by suitable layers for deadening the sound of the mechanisms.
Description
P. DEMING".
KEY BOARDS FOR TYPE WRITERS. No. 179,531. Patented July 4,1876
: I Qvmvog= N, PETERS, PHDTO-LITHOGRAFNER WASHINGTON, D. C.
UNITED STATES PATENT OEEIoE YPHILANDER DEMING, OF ALBANY, NEW YORK.
IMPROVEMENT IN KEY-BOARDS FOR TYPE-WRITERS.
Specification forming part of Letters Patent No. 179,531. dated July 4, 1876; application filed June 12, 1876.
' To all whom it may concern:
Be it known that I, PHILANDER DEMING, of Albany, in the county of Albany and State of New'York, have invented a new and 1mproved Key-Board for Type-VVriters, of which the following is a specification:
- rubber, and similar fabric, and intermediate washers, fitted to the stems of the keys.
In the drawing, A represents the key-board of a bholes & Glidden or other typewriter,
and B the key that slides in a perforation of the key-board, and is attached to the springacted and guided lever, that forms the connection with the type-rod, in the usual manner. The stem of the key is made longer than usual in type-writers, for the purpose of passing through a number of alternating layers, 0, of cloth, rubber, and similar fabrics, which are stretched on and secured to the key-board,
The layers B are perforated like the keyboard, to provide for the sliding motion of the stems of the keys. Tightly-fitting washers D, of rubber or other material, are placed around the stem intermediately between the layers B, and are retained by the same, so as to admit the motion of the key, but without admitting the escape of the clicking or other sounds made thereby. The Working of the keys on the key-board is thus accomplished in perfectly noiseless manner, so that the type-writer may be employed Without annoyance for stenotypic purposes in courts, churches, and other places, the type-writer casing being, furthermore, covered by suitable layers for deadening the sound of the mechanisms.
. Having thus described my invention, what 1 claim as new, and desire to secure by Letters Patent, is
As an improvement in type-writers, the combination of the key-board and keys with perforated layers of soft fabrics and intermediate washers fitted tightly on the stems of the keys, substantially in the manner and for the purpose specified.
PHILANDER DEMING. Witnesses:
JoHN HOMIGAN, J. H. MQFARLAND.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US179531A true US179531A (en) | 1876-07-04 |
Family
ID=2248938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US179531D Expired - Lifetime US179531A (en) | Improvement in key-boards for type-writers |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US179531A (en) |
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0
- US US179531D patent/US179531A/en not_active Expired - Lifetime
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