US138012A - Improvement in piano-forte bridges - Google Patents
Improvement in piano-forte bridges Download PDFInfo
- Publication number
- US138012A US138012A US138012DA US138012A US 138012 A US138012 A US 138012A US 138012D A US138012D A US 138012DA US 138012 A US138012 A US 138012A
- Authority
- US
- United States
- Prior art keywords
- forte
- piano
- bridges
- improvement
- bridge
- 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
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000012212 insulator Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
Images
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10C—PIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS
- G10C3/00—Details or accessories
- G10C3/07—Strings
- G10C3/08—Arrangements thereof
Definitions
- FIG. 1 of the accompanying drawing is a longitudinal view
- Fig. 2 is a side view, of my invention.
- the present invention relates to certain new and useful improvements in piano-forte bridges; and has for its principal objectthe prevention of the absorption or retention of the vibration caused by the direct connection of the wooden bridge with the block, and to improve the quality of tone.
- My improvements consist,mainly, in a glass or other suitable insulator, secured between the wooden bridge and tuning-pin block of a piano-forte, as will be hereinafter more fully described.
- a represents a portion of a bridge of a piano-forte, between which and the tuning-pin block b is placed and held, by means of screws 0, or otherwise, one or more glass or other suitable insulating-blocks, d, which may be arranged in several separate pieces, as shown, or made in one bar or piece with screw-holes formed at proper intervals in it.
- the bridge a in combination with the block b and insulator 01, substantially as specified.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Electrophonic Musical Instruments (AREA)
Description
W. G. ELLIS.
Piano-forte Bridges.
No. 738,012. PatentedApril22J873 ilmeddedfiwwMZr m wi -7 4 4 w W a UNITED STATES PATENT OFFICE,
WILLIAM C. ELLIS, OF WORCESTER, MASSACHUSETTS.
IMPROVEMENT IN PIANO-FORTE BRIDGES.
Specification forming part of Letters Patent No. 138,012, dated April 22, 1873; application filed September 10,1872.
To all whom it may concern:
Be it known that I, WILLIAM (J. ELLIS, of Worcester, in the county of Worcester and State of Massachusetts, have invented certain Improvements in Piano-Forte Bridge, of which the following is a specification:
Figure 1 of the accompanying drawing is a longitudinal view, and Fig. 2 is a side view, of my invention.
The present invention relates to certain new and useful improvements in piano-forte bridges; and has for its principal objectthe prevention of the absorption or retention of the vibration caused by the direct connection of the wooden bridge with the block, and to improve the quality of tone. My improvements consist,mainly, in a glass or other suitable insulator, secured between the wooden bridge and tuning-pin block of a piano-forte, as will be hereinafter more fully described.
In the drawing, a represents a portion of a bridge of a piano-forte, between which and the tuning-pin block b is placed and held, by means of screws 0, or otherwise, one or more glass or other suitable insulating-blocks, d, which may be arranged in several separate pieces, as shown, or made in one bar or piece with screw-holes formed at proper intervals in it.
Instead of the bridge being of wood and connected with a block, a cast-iron bridge, forming part of an iron frame, is sometimes used; but this arrangement is objectionable on account of the inferiority of tone produced compared with a wooden bridge, which, when connected directly with the block, is also objectionable on account of the absorption of the vibration; but by my improvements these objections are obviated by the use of the in sulator 61, above described, which prevents the transmission of the vibration from the bridge to the block, and at the same time the tone is reflected from the former to the soundingboard and greatly improved in quality.
Having thus described my improvements, what I claim as my invention, and desire to have secured to me by Letters Patent, is
The bridge a, in combination with the block b and insulator 01, substantially as specified.
Intestimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.
WILLIAM G. ELLIS,
Witnesses:
CARROLL D. TRIGHT, SAML. M. BARTON.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US138012A true US138012A (en) | 1873-04-22 |
Family
ID=2207426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US138012D Expired - Lifetime US138012A (en) | Improvement in piano-forte bridges |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US138012A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040122296A1 (en) * | 2002-12-18 | 2004-06-24 | John Hatlestad | Advanced patient management for triaging health-related data |
| US20040122485A1 (en) * | 2002-12-18 | 2004-06-24 | Stahmann Jeffrey E. | Advanced patient management for reporting multiple health-related parameters |
| US20040215090A1 (en) * | 2003-04-25 | 2004-10-28 | Jouni Erkkila | Estimation of cardiac death risk |
-
0
- US US138012D patent/US138012A/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040122296A1 (en) * | 2002-12-18 | 2004-06-24 | John Hatlestad | Advanced patient management for triaging health-related data |
| US20040122485A1 (en) * | 2002-12-18 | 2004-06-24 | Stahmann Jeffrey E. | Advanced patient management for reporting multiple health-related parameters |
| US20040215090A1 (en) * | 2003-04-25 | 2004-10-28 | Jouni Erkkila | Estimation of cardiac death risk |
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