Improvement in Piano-Forte Actions. Page: 2 of 3
[1], 2 p. : ill. ; 23 cm.View a full description of this patent.
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UNITED STATES PATENT OFFICE.
GEORGE O. V. ROEDERN, OF INDIANOLA, TEXAS.
IMPROVEMENT IN PIANO-FORTE ACTIONS.
Specification fornigpari t of Letters Patot No. 213,910, dat( d Aprili1, 187; appa I ct fidii
Angust 30, 1375.
To all whom i way concern: of sheet-metal cross-bars of a metallic su pport-
Be it linown that I, GToPG O. Y. Ron- ilg -fraiie, and lok a ed by a jointed hook. The
EEN, of Indianola, in the county of Calhoun key-lever is bent of sheet metal, and guided
and State of Texas, have invented a new and by slots in posts of the base-boards.
Improved Metallic Piano-Action, of which the IReferring to the drawings, A represents an
tollowin]g is a specification: upright standard, to which the hammer 1 ,
In the accompanying drawings, Figure 1 propelling-lever C, transmitting-leve r D, and
represents a sectional side elevation of my im- locking-hook E are pivoted. The standard A
proved metallic piano-action, shown as adapt- is composed of two pieces of sheet metal, be-
ed to at upright piano. Fig. 2 is an end ele- tween which a piece of felt of suitable thick-
vation of the same; Fig. 3, a detail side view ness is interposed and rivctedt. lie hammer
of the hammer-rod; Fig. 4, a detail sectional : is composed of a head, a, rod b, and base d,
end view of the transmnitting-lever. Figs. 5, 6, the head being recessed to receive the felting,
and 7 are vertical transverse sections through and applied, either directly or by an interme-
the key lever, respectively on lines x x, y y, diate slotted shield, to the pointed upper end
and az, Fig. 1. Fig. S shows a section and side of the hammer-rod. The haimmer-rod b is
view of the rotating wheel of thie propelling- made of a piece of sheet metal, with pointed
lever, and Fig. 9 is a side view of the action, projections b' at each end, but in opposite di-
shown as adapted to a square piano. rection, the lower one carrying the recessed
Similar letters of reference indicate corre- base d, to which is applied a triangular piece
sponding parts. of felting, d'.
The object of this invention is to furnish for The hamner lead and base may be made
pianos an imliproved action that is perfectly of wood or bent of sheet metal, as desired.
proof against atmospheric influences, as all The propellinglever C is also stamped out of
the :movable parts and supporting parts of the sheet metal and a recessed rotating wheel
action are made of sheet metal and without mounted thereon.
glee. The propulsion and escapement of tile A pin or tooth, e, of the rotating wheel c'
action is effected in the same direction as the projects below the felting of tile hammer-base.
stroke of the hammer, and the gravitation of At the lower side of trie propelling-lever C
the component parts to their points of inertia is a triangular projection , c which rests on a
obtailled without the aid of a spring or other felt cushion of an upright armc 1), of the
appliance. Owing to the materials employed, transmnitting-lever D. The upright arm 1) is
the action is more durable, and especially pivoted to the transmitting-lever D, and ad-
adapted for warmer cottntries, while its con- justed thereon by a horizontal blar, D, with
struction secures a greater precision, and con- set-screw at one or both ends. so as to eciure
sequently greater responsiveness to the touch, the arm D at any desired annigle. The trans-
and a more silent movement, than in actions mitting-lever D, the upright arm D, and the
made of wood. The working parts may, by adjusting-bar D' arc all mtade of sheet metal,
slight changes, be used for upright as well as the arm l)' resting on a felt cushion of the
for sqare pianos. key-lever F, that is formed or doubled -up sheet
The invention consists of a piano-action in .metal, between which a felt lining is pressed
which the diterent working parts andt the in. The key-lever transmits tihe motion ex-
supporting-standards, cross-bars, and fraine erted on the key by the upright arm of the
are made of sheet metal and fitted and felted transmitting-lever to the propelling-lever,
without glue. The hammer is made of a head- which, by its rotating wheel and pin, actuates
rod and bse, and actuated by at rotating the hammer so that the. same strikes the
wheel and iin of the propelling-lever, which strings.
is operated by an npright arm of the trans- The supporting-standiard A is secured by
mitthig-lever and by the key-lever. The work- projecting side pins or rivets f to recessed
ingparts are pivoted to ashect nmetalstandard, sheet-metal and felt.-lined cross-bars G of the
whici is supported by pins or rivets in recesses actionl-ameii C, and locked thiereto by the
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Reference the current page of this Patent.
Roedern, George O. V. Improvement in Piano-Forte Actions., patent, April 1, 1879; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth169827/m1/2/?q=%22United%20States%20-%20Texas%20-%20Calhoun%20County%20-%20Indianola%22: accessed May 4, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.