made in musical keyed Instruments. 327 
mers to act upon 24 distinct sets of strings or unisons. 
Three pedals bring on the flats to be treble, and the like 
number bring on the sharps to the bass. By reversing my 
mechanism, | produce also the same effect; in which case, by 
three of the pedals the flats are brought on to the bass, and 
by the other three the sharps are brought on to the treble. 
Every pedal has a separate movement and spring, which 
act independerit of the key; on each movement are fastened: 
two of the twelve hammers belonging to each octave 
throughout the compass ; so that a pedal for the flats brings 
on two additionaleflats in each octave, and in like manner 
a pedal for the sharps bringe on in each octave two addi- 
tional sharps; when such additional flats or sharps are no 
jonger wanted, by omitting the use of the pedal the spring 
belonging to it immediately leaves the movement to its 
former position or fixed tones, of three sharps, two flats, 
and seven natural notes in each octave: the mechanism for 
the flats and sharps is so constructed, that if more sharps 
or flats are wanted than one pedal will produce, a second 
without the first, will be sufficient to bring on two of each 
in addition. So also, if more sharps or flats than the se- 
cond pedal will produce are wanted, the third without the 
first or second, is sufficient to bring on two of each im like 
manner, Each pedal is made to fasten, if it should be 
~wanted. In Organs, the improvement is effected also by 
six pedals; and in cach octave there are 24 distinct sounds, 
from 24 distinct pipes: there is a separate movement and 
a spring to every pedal. Every fixed key has two stickers, 
two black-falls, and two pallets, which act on two pipes of 
different sounds. Three of the six movements are fixed in 
the middle of the front, above the keys, and bring on the 
sharps to the back of the organ, and the same number are 
fixed in the like direction behind, to bring on the flats to- 
wards the front. By fixing all the six movements in the 
middle of the front above the keys, or in the same situation 
behind, | produce also the effect desired. By reversing the’ 
movemcnts, my mechanism will admit of bringing on the 
sharps and flats, either to the front or back of the organ, 
or, if wanted, my mechanism will admit having both the 
sharps and flats, either before or behind the instrument. 
With regard tothe pedals and theirconstruction, action, &c. 
I refer to that part’ (before described) relative to such, in 
my piano-forte specification.———1In witness thereof, &c. 
od. » oP Specie 
