US144167A - Improvement in falls for parlor-organs - Google Patents

Description

2Sheets-Sheet2. vW. D. TRUWBRIDGE.

Falls for Parlor-Organs. No. 144,167. Pazentedoct.2s,1873.

` Mfz'Z-nesses. Inventor.'

UNITED STATES PATENT OFFICE.,

IVIIJLIAM O. TROW BRIDGE, OF NEIN/"ION, ASSIG-NOR r I O MASON AND HAllzlLlN ORG-AN OOhIIANY, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN FALLS FOR PARLOR-ORGANS.

Specification forming part of Letters Iatent No. 144,167, dated October 28, 1873; application tiled. September 25, 1873.

To all 107mm it muy concern:

Bc it known that I, IVILLIAM O. TROW BRIDGE, ot' Newton, in the county of Middlesex and State ot Massachusetts, have invented an Improved Fall for ParlorOrgans; and I do hereby declare that the tbllowing, taken in connection with the d awings which accompany and form part of this speciiication, is a description of my invention suliicient to en able those skilled in the art to practice it.

The invention relates to the construction and arrangement of a new fall for parlonorgans. Instead of making the fall in the form ot' a hinged lid, to fold over upon the top of the instrument7 I make it as a curved board, or as a quarter of a cylindrical tube, the ends ot' which are open, but are inclosed by the frame ot' the instrument, this quarter-tubular board or fall being fixed to arms pivoted in the axial line of the cylindrical surface, and being movable upon said pivotal centers in such manner as to swing` over to the front of the keys to close the instrument, or over said .keys and back and down into the case to open the instrument. My invention consists in a parlor-organ having the i'all thus generally described.

The drawing represents a construction embodying my invention.

Figure 1 shows an instrument in elevation with the fall in section, the instrument being closed. Fig. 2 shows the tall in section, the instrument being open.

a. denotes the frame, b one of the keys, c the name-board, the frame being builtand the keys and name-board, as well the parts not seen, being constructed and arranged in the ordinary manner. d denotes the fall, made as the quarter ot' a hollow cylinder or cylindrical tube, and of a length equal to, or a little greater than, the length of the bank of keys. The drop extends from the frame piece e, in front of the keys, to the top board or lid j', and opens at its opposite ends against the opposite fra-me piece g. At its opposite ends it is fixed to two arms, l1, and these arms are jointed, as seen at t', to stationary metal hinge-plates 7s, the pivotal centers 'i being at the center of the sweep oi' the curve of the fall or drop board d. The arms h sustain the fall, and the latter swings upon the centers, shutting over the keys to close the instrument, as shown in Fig. l; or is thrown back into the ease to open the instrument, as seen in Fig. 2. lVhen open, there is an open space, l, over the name-board, but a board, m, conceals the levers and the mechanism in the body of the instrument.

'lhe whole arrangement isnnique, simple, and practical, the fall being easily operated, and being free from mechanism tending to become easily disarrangcd.

The fall may be made otherwise than cylindrical; but its upper edge n and lower edge o must be equidistant from the pivotal centers t' to form the same joint at the top j".

I claim- A parlororgan or similar instrument havn ing a rigid curved fall, el, lixed to arms hf, and pivoted to operate substantially as described.

Executed this Sth day of September, A'. l). 1873.

W. O. TROW'BRIDGE.

ll'itnesses:

Farmers GoULn, M. W. FnoTnrNGH/iwr.

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