US513970A

US513970A - Upright-piano frame

Info

Publication number: US513970A
Authority: US
Publication date: 1894-01-30
Anticipated expiration: 1911-01-30

Description

(No Model.) D

J. W. REED.

UPRIGHT PIANO FRAME. No. 513,970. Patented Jan. 30, 1894-.-

UNITED STATES PATENT OFFICE.

JOHN W. REED, OF CHICAGO, ILLINOIS.

U PRlGHT-PIANO FRAM E.

SPECIFICATION forming part of Letters Patent No. 513,970, dated January 30, 1894. Application filed April 17, 1893. Serial No. 470,734- (No model.)

T0 11% whom it may concern:

Be it known that I, JOHN W. REED, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Upright-Piano Frames; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification.

This invention relates to that type of upright piano backs that form the subject matter of my former Letters Patent, No. 473,082, dated April 19, 189.2,and in which the sounding board with its marginal inclosing frame is attached to a wooden frame secured to the outside of the metallic string plate of the piano.

The object of the present improvement is to provide a simple, strong and durable means for attaching the metal string plate to its outer marginal wooden frame, and by means of which the employment of attaching flanges on the margins of the string plate is avoided; it having been found in practice, a difficult matter to cast such marginally flanged string plates without a buckling and springing of the plates produced, due to unequal expansion of the different portions of such plates. 1 attain such objects by the construction and arrangement of parts illustrated in the accompanying drawings, in which- Figure 1,is a detail perspective view of the lower corner portion of a piano back constructed in accordance with the present invention; Fig. 2, an enlarged detail sectional elevation; Fig. 3, an elevation of a corner portion of the string plate.

Similar numerals of reference indicate like parts in the different views.

As represented in the drawings the general construction and arrangement of parts will be the same as in my former patented construction, 1 representing the metal string plate, 2 the main outer marginal wooden frame, the rear edge of which projects back past the string plate 1, so as to aiford means for the attachment of the sounding board 3, and its marginal frame 4.

In the present improvement the marginal frame 2 has its back portion formed with sunken recesses 5, for the reception of the projecting lugs 6, that in the present improvement are formed on the margins of the string plate 1; the attachment between the parts being effected by lag screws 7, the heads of which are housed in the recesses 5, clear of the sounding board or other parts.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is-

In a frame or back for pianos, the combination of a metal string plate, having a series of marginal projecting lugs 6, an outer marginal frame provided with recesses 5 for the reception of the lugs 6, and adapted to project rearward of the string plate, and a sounding board secured to the back of the outer marginal frame, substantially as set forth.

In testimony whereof witness my hand this 15th day of April, 1893.

JOHN W. REED.

In presence of- ROBERT BURNS, J. W. REED, Jr.