US536578A - mitchel - Google Patents
mitchel Download PDFInfo
- Publication number
- US536578A US536578A US536578DA US536578A US 536578 A US536578 A US 536578A US 536578D A US536578D A US 536578DA US 536578 A US536578 A US 536578A
- Authority
- US
- United States
- Prior art keywords
- plate frame
- canada
- arch
- mitchel
- posts
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 210000000614 Ribs Anatomy 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 4
- 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
- G10C3/04—Frames; Bridges; Bars
Definitions
- FIG. 1 is a perspective from the rear of same, showing the plate frame and sounding board attached, and not having the heavy wood posts usually found in upright pianos, and having a hollow chamber betweenthe sounding board and back of case which permits of a full, free and independent vibration of the sounding board.
- Fig. 2 is a side elevation.
- the plate frame may be of any approved size or design, either straight or arched.
- A represents the two arched plates of iron connected together by the iron ribs marked by the letter B.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Stringed Musical Instruments (AREA)
Description
(No Model.)
J. B. MITCHEL.
ARCH PLATE FRAME FOR UPRIGHT PIANOS. No. 536,578. Patented Mar.26, 1895.
UNITED STATES PATENT OFFICE.
JOHN B. MITOHEL, OF BOYVMANVILLE, CANADA.
ARCH-PLATE FRAME FOR UPRIGHT PIANOS.
SPECIFICATION forming part of Letters Patent No. 536,578, dated March 226, 1895.
Application filed July 24,1893. Renewed February 9, 1895. Serial No. 537,755. (No model.) Patented in Canada October ll,
To all whom it may concern:
Be it known that I, JOHN B. MITOHEL, residing at the town of Bowmanville, county of Durham, in the Province of Ontario, Canada, have invented certain new and useful Improvements in an Arch-Plate Frame for Upright Pianos, (for which I have received Letters Patent in the Dominion of Canada, dated October 11, 1893, No. 44,442;) and I do hereby declare that the following is a full, clear, and exact description of the same, reference being made to the accompanying drawings, in which- Figure 1 is a perspective from the rear of same, showing the plate frame and sounding board attached, and not having the heavy wood posts usually found in upright pianos, and having a hollow chamber betweenthe sounding board and back of case which permits of a full, free and independent vibration of the sounding board. Fig. 2 is a side elevation.
The plate frame may be of any approved size or design, either straight or arched.
A represents the two arched plates of iron connected together by the iron ribs marked by the letter B.
C represents the heavy posts supporting What I claim as new, and desire to secure by Letters Patent, is-
1. The arch plates marked A and con nected together by the ribs B and sup ported at each end by the posts 0.
2. The combination of the arched plates A, ribs B, posts 0 and rail E connected to the piano plate H by the bolt K and wrest plank G substantially as and for the purpose hereinbefore set forth.
Bowmanville, July 4:, 1893.
JOHN B. MITOHEL In presence of- GEo. FARWELL, W. T. ALLEN.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US536578A true US536578A (en) | 1895-03-26 |
Family
ID=2605339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US536578D Expired - Lifetime US536578A (en) | mitchel |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US536578A (en) |
-
0
- US US536578D patent/US536578A/en not_active Expired - Lifetime
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