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8/15/2019 US Patent 2,262,335, entitled "Musical Instrument" to inventor Russell, issued 1941.
1/6
Nov.
1 1 , 1941. c .
w.
RUSSELL
2,262,335
MUSICAL INSTRUMENT
F i l e d J u l y 2 1 ,
1 9 - 3 9
3 S h e e t s - S h e e t
1
I I I I I I I I I I I I I ' I ’
, I ’ I ' I ’ , ”
I n v e n t e d l
6 ' . ms-9e L
A
t o r n e y s v ?
8/15/2019 US Patent 2,262,335, entitled "Musical Instrument" to inventor Russell, issued 1941.
2/6
N o v . 1 1 , 1 9 4 1 . c . w.
RUSSELL
2 , 2 6 2 , 3 3 5
M U S I C A L I N S T R U M E N T
Filed July 2 1 ,
193 9
S Sheets-Sheet 2
i 7
1 4 '
a3
r F h
: 6
I ?/
A t o r n e y s ?
8/15/2019 US Patent 2,262,335, entitled "Musical Instrument" to inventor Russell, issued 1941.
3/6
Nov. 1 1 , 1941.
c.
w. RUSSELL ‘ - 2 252 335 _
MUSICAL
INSTRUMENT
Filed July 2 1 . 193 9 3 Sheets-Sheet 3
I n v e n i o r
. ‘ /
C’.
uss ell
8/15/2019 US Patent 2,262,335, entitled "Musical Instrument" to inventor Russell, issued 1941.
4/6
, d e p r e s s i o n i n
t h e
sounding
board o f
P a t e n t ed N o v .
l l ,
1 9 4 1
2 , 2 6 2 , 3 3 5
UNITED
STATES
PATENT ‘ O F F I C E
"
.
2 262 335
MUSICAL
INSTRUMENT
C l a r e n c e W. R u s s e l l , ‘ L o n g t o m K a n s .
A p p l i c a t i o n
J u l y
2 1 ,
1 9 3 9 , S e r i a l N o . 2 8 5 , 1 7 3
(Cl.
s 4 _ 1 . 1 ' 5 )
' 6
C l a im s .
My invention r e l a t e s
generally
t o stringed'mue
s i c a l i n s t r u m e n t s , and p a r t i c u l a r l y t o i n s t r u
ments
o f t h i s t y p e w hi ch i n v o l v e an i n d u c t i v e
e l e c t r i c a l
pick-up
u n i t
arranged t o
operate
a r e —
production
d e v i c e
a t a
i s t a n c e from t h e
i n s t r u
ment,
and an important
o b j e c t
o f my
n v e n t i o n
i s t o p r o v i d e arrangements o f
t h i s
t y p e
w h o s e
operation
i s characterized
b y absence o f
tone
d l s ~ ~
t o r t i o n
and by u n i f o r m i t y
i n t o n e ‘
v o l u m e ,
a n d
wherein
a c c u r a t e
r e p r o d u c t i o n o f
t h e music
e v o l v e d by v i b r a t i n g t h e d i f f er e n t s t r i n g s o f t h e
instrument
i n
t h e c o u r s e
‘ o f . p l a y i n g
u p o n t h e
same s assured.
Another
important o b j e c t
o f
my n v e n t i o n
i s
t o
p r o v i d e a r r a n g e m e n t s
o f t h e ‘
c h a r a c t e r s t a t e d
a b o v e
wherein
t h e
p i c k - u p u n i t a s s o c i a t e d
with
t h e s t r i n g s o f t h e
instrument
i s
devisedto e n a b l e
t h e r e p r o d u c t i o n u n i t t o r e p r o d u c e e q u a l
‘ v o l u m e
r e g a r d l e s s
o f
t h e
d i f f e r e n c e
i n
d i a m e t e r , v i b r a
t i o n f r e q u e n c y , an d
amplitude o f
the s t r i n g o r
s t r i n g s , and r e g a r d l e s s o f
t h e
d i f f e r e n t
p l a n e s
in
w h i c h the s t r i n g o r s t r i n g s a r e
v i b r a t e d .
Other important
o b j e c t s and
advantages
o f my
invention w i l l
be apparent from a reading o f the
following description
t a k e n i n c o n n e c t i o n w i t h
t h e
drawings
wherein f o r p u r p o s e s o f
i l l u s t r a
t i o n I have
s h o w n p r e f e r r e d embodiments
o f my
i n v e n t i o n .
In the drawings:
Figur e
1
i s a longitudinal
sectional
a n d
s i d e ‘
e l e v a t i o n a l view
o f
a s t r i n g e d
musical
i n s t r u
m e n t
sh o w i ng
the i n c o r p o r a t i o n t h e r e i n o f a
pick-up
and a m p l i f y i n g u n i t i n
accordance with
t h e p r e s e n t i n v e n t i o n .
F i g u r e
2 i s
a t o p p l a n v i e w o f F i g u r e 1 .
Figure
3 i s
an
e n l a r g e d
s i d e e l e v a t i o n a l view o f
t h e pick-up u n i t removed from the
i n s t r u m e n t .
Figure
4 i s a
t o p
plan view
o f
Figure 3 .
Figure
5 i s
a
r i g h t
h a n d
end
e l e v a t i o n a l view
o f Figure .
Figure
6
i s a
t r a n s v e r s e v e r t i c a l s e c t i o n a l
view
taken through
t h e
pick-up u n i t a l o n g s i de o f one
o f t h e
s t r i n g s
o f t h e
instrument
and sh ow ingthe
s p r i n g s c e n t e r e d i n t h e
c o r r e s p o n d i n g o p e n i n g s
of
t h e
pole pieces.
Figure 7
i s a s i d e
e l e v a t i o n a l
view o f
an a l t e r
n a t e
form
o f
p o l e p i e c e .
Figure 8 i s a l e f t h a n d end e l e v a t i o n a l view
o f
a
pick-up
u n i t
sh o w i ng the same mo un te d
i n
a
t h e
i n s t r u
me n t
instead
o f ?us h
therewith a s
i n the em—
bc'diment i l l u s t r a t e d in Figur e l .
Figure 9
i s
aperspective v i e w o f
one
o f the
p o l e
p i e c e s
o f t h e embodiment
shown i n F i g u r e s
3
t o
6 , i n c l u s i v e .
20
40
Figure 1 0 i s a p e r s p e c t i v e view o f t h e p e r m a
nent
magnet
o f
t h e
p i c k - u p u n i t .
Referring
i n d e t a i l
t o the d r a w i n g s , the n u
m e r a l
. 5
g e n e r a l l y d e s i g n a t e s a .
s u i t a b l y
i l l u s t r a
t i v e
t y p e o f
s t r i n g e d
m u s i c a l instrument such
a s
a g u i t a r , t h e same
having t h e sounding board
6 .
t h e b r i d g e 1 ,
and
t h e
s t e e l
s t r i n g s 8 s t r u n g
from
" t h e b r i d g e , the s o u n d i n g b oa r d being devoid o f
t h e u s u a l sound o p e n i n g . Located i n w a r d l y o f
the
. b r i d g e ‘ I
a nd
i n a
p o s i t i o n
f u n c t i o n a l l y
r e
l a t e d
t o
that
o f the
usual
s ound h o l e i s
the
p i c k - u p
u n i t 5 .
T h e pick-up u n i t 9 comprises a U-shaped per
ma n e n t
magnet l 0
formed o f
f l a t
r e c t a n g u l a r
c r o s s se c t io n s t e e l w i t h t h e s t r a i g h t l e g s I I and
I 2 t h e r e o f each
formed
with
a
p a i r
o f
assembling
b o l t h o l e s I 3 . 1 4 through which t h e a s s e m b l i n g
b o l t s I 5 , l 6 p a s s .
‘The r e s p e c t i v e a s s e m b l i n g
b o l t s
p a s s
a l s o
t h r o u g h r e s p e c t i v e p o l e p l a t e s I T ,
M
w hi ch a r e t h e r e b y
clamped
d i r e c t l y
a g a i n s t
t h e i n n e r s u r f a c e s o f t h e
r e s p e c t i v e
magne t l e g s .
The
p o l e p l a t e s
l 1 , l 8 e a c h ‘ c o m p r i s e , a s
shown
i n
F i g u r e
9 , a g e n e r a l l y r e c t a n g u l a r magneti
c a l l y
permeable p l a t e having i t s upper
e d g e
c a s
t e l l a t e d by
t h e p r e s e n c e o f
s l o t s
l 9
de?ning i n
d i v i d u a l
p o l e - p i e c e s 2 0 c o r r e s p o n d i n g i n number
t o t h e
number o f m a g n e t i c a l l y permeable s t e e l
s t r i n g s
8 p o s s e s s e d by t h e i n s t r u m e n t . Each
p o l e - p i e c e
i s
formed w i t h
‘ a
c i r c u l a r
opening
2 l
through
which t h e c o r r e s p o n d i n g
s t r i n g p a s s e s ,
e a c h
p a r t i c u l a r
o p e n i n g 2 |
b e i n g p o s i t i o n e d s o t h a t
w h i l e t h e c o r r e s p o n d i n g
s t r i n g
p a s s i n g t h e r e
t h r o u g h
i s at r e s t the s t r i n g w i l l l i e exactly i n
t h e
a x i a l c e n t e r o f
t h e o p e n i n g t h e r e by p r o v i d
i n g
f o r
e q u a l i z e d
m a g n e t i c
c o o p e r a t i o n
b e t w e e n
t h e
s t e e l
stringand t h e p o l e - p i e c e n o matter i n
w h a t d i r e c t i o n
o r v p l a n e t h e
s t r i n g
may
be
v i
b r a t i n g , s i n c e i n
t h i s
arrangement
t h e
s t r i n g c u t s
equally
a s
many i n e s o f
f o r c e
i n a ny
d i r e c t i o n
o f
v i b r a t i o n
a n d
w h i l e v i b r a t i n g f r e e l y
w i l l
ap
proach
t h e o p p o s i t e s i d e s
o f
t h e o p e n i n g a t
equally ‘ s p a c e d ‘ d i s t a n c e s therefrom.
The i z e s
of the o p e n i n g s 2 | are n o t a l l the
same, but t h e s e
openings
a r e
ga uged
a s t o s i z e
o r diameter
s o
that t h e i r s t r i n g s w i l l not touch
t h e i r
s i d e s when vibrated a nd
s o that
the mag~
n e t i c
e f f e c t o f
each s t e e l s t r i n g o n the c o r r e
s p o n d i n g p o l e - p i e c e s o f - t h e permanent magnet
i s
the same r e g a r d l e s s o f t h e diameter o f the
s t r i n g s
and
t h e
a m p l i t u d e
and
‘ f r e q u e n c y o f t h e i r
v i b r a
t i o n .
In this way
equalized
v o l ume
re produ ct i on
i s assured f o r the
d i f f e r e n t
s t r i n g s
b y
the r e
production device (hotshoWn') w h i c h
the p i c k -
up unit . i s t o
control
t h r o u g h
the
medium of
a
s u i t a b l e amplifying mean s
such
a s that
shown.
8/15/2019 US Patent 2,262,335, entitled "Musical Instrument" to inventor Russell, issued 1941.
5/6
. 2
h i n g e c o n n e c t i o n
32
v o f
magneto
t h e
p i c k - u p
c o n n e c t e d t o t h e - s t e e l
As
shown i n t h e d r a w i n g s e a c h
p o l e - p l a t e
i s
mounted t o i t s
l e g
o f
t h e permanent magnet
I n
w i t h
i t s
l o w e r e d g e
s u b s t a n t i a l l y
?ush w i t h t h e
l o w e r e d g e o f t h e magnet and with t h e upper
p a r t
o f
t h e p o l e - p l a t e s p r o j e c t i n g a b o v e
t h e
mag
n e t
and
s u r r o u n d e d b el o w t h e
p o l e - p i e c e s
w i t h
h o r i z o n t a l l y
wound c o i l s 2 2 , 2 3 ,
r e s p e c t i v e l y ,
w h i c h h a v e
o n e
end
gr ou nded
t o
the
m a g n e t at
2 3 '
a n d the remaining e n d 2 4 ' . l e d out o f the
instrument
b y
an
i n s u l a t e d
conduit
2 4 p a s s i n g
under
t h e s o u n d i n g b o a r d and
o u t
t h r o u g h a
c o n v e n i e n t ‘ o p e n i n g
i n
t h e ' s i d e
‘ w a l l e t / t h e i n ;
10
. I . . w 1L‘v
‘ d e s c r i b e d , ’
s a i d
u n i t - c o m p r i s i n g a
U-shaped
p e r
trument p r o t e c t e d b y a
g r o m m e t
2 5 .
"The c o i l s
a r e connected a s
i n d i c a t e d
a t 2 5 '
i n
s e r i e s a i d i n g
r e l a t i o n
p r o d u c i n g
i n e f f e c t
t r i c s p a c e r
u
r a v e r s e d
by
2 9
may b e
u s e d
b e t w e e n t h e p o l e - p l a t e s ~ . ‘ - '
o n t h e
u p p e r
e d g e s o i ’ t h e l e g s o f t h e m a g n e t 2 0 ,
a t t h e o p p o s i t e
e n d s
o i ’
t h e c o i l s 2 2 , 1 3 "
a r e
non—
one
c o i l
‘ h a v i n g o n e ‘ v
end t h e r e o f grounded t o
t h e
magnets 1 A , , d i e l e c - _ _
the
wood
sc r ew s 2 8 ,
1 5
2 , 2 6 2 , 3 3 5
by a s u i t a b l e e l e c t r i c a l c o n d u c t o r t o t h e p o i n t 2 3 ’ .
A l t h o u g h
I
have shown and d e s c r i b e d h e r e i n
p r e f e r r e d
embodiments
o f
my
n v e n t i o n ,
i t i s
t o
b e d e ? n i t e l y u n d e r s t o o d t h a t I do n o t d e s i r e
t o
l i m i t
t h e a p p l i c a t i o n o f t h e i n v e n t i o n
t h e r e t o ,
and an y
change
o r
changes
may e
made i n
t h e
m a t e r i a l s , and
i n
t h e s t r u c t u r e and arrangement
o f the p a r t s , within
t h e
s p i r i t
o f the i n v e n t i o n
a n d the scope of the subjoined c l a i m s .
Hav in g d e s c r i b e d
the
i n v e n t i o n , w h a t i s
claimed
a s
n e w
s :
e l e c t r i c a l
‘ p i c k - u p
' u n i t o f ,
t h e
c h a r a c t e r
manent
m a g n e t h a v i n g s u b s t a n t i a l l y s t r a i g h t
l e g s , a p o l e p i e c e s e c u r e d t o
t h e
i n n e r
‘ s i d e
o f
Handprojecting
beyond one
edge
o f
each l e g , a
m a g n e t i c
b a r s
2 8 , 2 1
e a c h
c e n t r a l l y t r a v e r s e d by
t h e r e s p e c t i v e
wood
s c r e w s 2 8 ,
2
which
a n c h o r
t h e p i c k - u p u n i t p o p e r a t i v e l y i n p l a c e
on
t h e
‘ l o n g i t u d i n a l l y w o u n d
c o i l o n
t h e p r o j e c t i n g
p a r t
. o f
e a c h r ' p o l e
p i e c e , each p r o j e c t i n g
p a r t c o m
p r i s i n g
a : m a g n e t i c a l l y permeable
bar
hinged
a t
one end e r
t h e
upper e d g e o f
t h e
body o f
t h e
p r o j e c t i n g p a r t , t h e l o w e r - e d g e
o f s a i d
b a r
and
t h e s a i d u p p e r e d g e b e i n g formed
w i t h c o m p l e
‘ ' m e n t a r y
s e m i - c i r c u l a r a p e r t u r e s , t o de?ne
s t r i n g
s o u n d i n g board
6 ,
eitheronthe ‘ t o p , s u r f a c e
o f
the sounding board a s s h o w n i n
Figure
1 o r
i n
an
‘ a c c o m m o d a t i n g
d e p r e s s i o n S I f o r m e d i n t h e t o p
o f t h e s o u n d i n g
b o a r d , ‘ t h e
l a t t e r “ a r r a n g e m e n t
being c a l l e d f o r in the c a s e o f
an
instrument’ _
A s s e m b l e d a s
d e - '
‘ 3 ' 0
aving l o w - l y i n g , " s t r i n g s .
s c r i b e d t h e - p a i r e d c a s t e l l a t i o n s onthe o p p o s e d
p o l e - p i e c e s h a v i n g t h e i r
s i m i l a r l y ,
s i z e d
o p e n i n g s
. 2 5
‘ a c c o m m o d a t i n g o p e n i n g s w h i l e t h e b a r i s i n
c l o s e d
position.‘ -
I ‘
' 2 . In
a
musical
instrument having magnetiza
b l e v i b r a t o r y s t r i n g s a r r a n g e d
i n
s i d e b y s i d e
r e
l a t i o n ' g ' a n e l e c t r i c a l
pick-up
u n i t , s a i d
u n i t
c o m
2 | a x i a l l y a l i g n e d w i t h ' t h e
c o r r e s p o n d i n g
s t r i n g s
.
The
b i g h t
o f
t h e
p e r m a n e n t
magnet i s
p r e f - _
e r a b l y p l a c e d a d j a c e n t t h e s m j ' a l l o r t r e b l e
s t r i n g s “
v
of
the instrument. .
A ‘ f o r m o f ‘
p o l e - p l a t e
I l a ‘ s h o w n
i n
‘ F i g u r e 7
o f t h e ' d r a w i n g s p e r m i t s
i n s t a l l a t i o n
‘ a n d r e - . _ ‘
m o v a l of
t h e ‘ pic k-up
u n i t o n
the in strumentv V .
w i t h o u t v r e m o v i n g t h e s t r i n g s t h e r e o f . T h i s
P o l e - p l a t e l l a ' h a s a
r e q u i r e d
member
and s i z e s o f s e m i - c i r c u l a r o p e n
i n g s
2 l a t o
complement s i m i l a r o p e n i n g s 2 “ )
formed
in
t h e up p er
edge
o f t h e p l a t e . A lamp-
i n g screw
3 3
t o be
t u r n e d
t o l o c k t h e . b a r
3 |
i n p l a c e , a f t e r w t h e g s t r i n g s 8
have b e e n ' p o s i t i o n e d i n
the
o p e n i n g s . T h e p o l e
p l a t e s
I l a
may be
s u b s t i t u t e d
f o r
t h e
i 1 and I where d e s i r e d .
8 ,
The c o i l
o f
t h e p i c k - u p u n i t 9 ,
‘ t h e s t e e l s t r i n g s
t h e f r a m e o f t h e p i c k - u p u n i t , and t h e c h a s s i s
t h e a m p l i ? e r ,
g e n e r a l l y d e s i g n a t e d 3 5 , - h a v e
a
c ommon g ro u n d .
‘ T h a t - i s
t o s a y ,
t h e
s h i e l d
2 4
o v e r t h e
a m p l i ? e r
l e a d
2 4 ' ,
and m e c h a n i c a l l y c o n n e c t e d t o
t h e
c h a s s i s
o f
t h e
a m p l i ? e r
3 5 ,
i s e l e c t r i c a l l y
c o n n e c t e d
t o
t h e
u n i t which
i s c o n n e c t e d
t o . one e n d
o f
. t h e ' s e r i e s : a i d i n g c o i l s ' f a n d a l s o
w i t h
t h e s t e e l b r i d g e I o v e r
w h i c h - ‘ t h e
s t r i n g s I
r e s t . T h i s g r o u n d i n g a r r a n g e m e n t - i s
made
t o
k e e p ' s t r a y i n d u c t i o n . and
n o i s e f r e q u e n c i e s away
f r o m .
t h e p i c k - u p
u n i t . -
The
ampli?er
o p e r a t e s
a
s u i t a b l e ‘ r e p r o d u c e r 3 | such
a s
a l o u d s p e a k e r .
The l e a d
2 4 '
i s c o v e r e d by
and
i n s u l a t e d
from
a ? e x i b l e z m e t a l s h i e l d 2 4 , which s h i e l d i s t h e
ground l e a d
t o t h e a m p l i ? e r and
‘ a t t a c h e d t o
t h e
a m p l i ? e r c h a s s i s
a t o n e
e n d . T h e
r e m a i n i n g
end o f the l e a d 2 4
i s
c o n n e c t e d t o t h e frame
o f
t h e p i c k - u p u n i t a t 2 3 ' . The
m e t a l b r i d g e "
t o
w h i c h t h e s t r i n g s 8 a r e a t t a c h e d i s c o n n e c t e d
carried by the -bar u
s
arranged
"
i n t o - t h e
upper
e d g e v
o f
the
saidplate
s t r i n g s
l - b y
c o n n e c t i o n f
‘ a s
prising a
p e r m a n e n t
magnet characterized
b y
p o l e - ‘ p l a t e s a r r a n g e d a c r o s s a n d l o n g i t u d i n a l l y
s p a c e d a l o n g t h e
s t r i n g s ,
e a c h
p o l e - p l a t e s
h a v i n g
t h e r e o n p o r t i o n s
formed w i t h s t r i n g
accommo"
d a t i n g h o l e s ,
t h e
h o l e s i n t h e s a id p o r t i o n s b e i n g
a x i a l l y ‘
a l i g n e d and a r r a n g e d
t o
‘receive t h e c o r
r e s p o n d i n g s t r i n g s i n c o n c e n t r i c a l l y s p a c e d a r
rangement' whil e the s t r i n g s are
at r e s t ,
the
s a i d
4 5
pole-plates
i n d u c t i v e windings
5 5
which i s
‘ e l e c t r i c a l l y
~
i n d i v i d u a l p o l e j l p i e c e s
J
t h e
magnet an d c o r r e s p o n d i n g i n
number
t o t h e
‘ 6 5
‘ h o l e s b e i n g c i r c u l a r
and
p r o p o r t i o n e d
i n
d i a m e ~
*
t e r
i n ' a c c o r d a n c e
with
t h e ,
s i z e
and
a m p l i t u d e
o f
"
v i b r a t i o n
‘ o f the individual
strings.
‘ p o r t i o n o f i t s u p p e r - e d g e
c u t
{ 4 , 0
0 1 1 t o
p r o v i d e
t h e h in g e d b a r 3 |
w h i c h
h a s t h e :
t o n n e e n d o f
t h e p l a t e , a n d ,
t h e l o w e r e d g e
o f
t h i s b a r isformed w i t h t h e
3 . 4
I n f i a
musical
i ns t rument having‘ magnetiza~
' b l e w i b r a t o r y '
s t r i n g s
a r r a n g e d
i n
s i d e
b y
s i d e
r e
' l a t i o n f a n - e l e c t r i c a l p i c k - u p u n i t , s a i d
u n i t
com
~ ‘ p r i s i n g a ‘ permanent magnet c h a r a c t e r i z e d b y
p o l e - p l a t e s I
a r r a n g e d a c r o s s
a n d l o n g i t u d i n a l l y
s p a c e d
a l o n g
t h e s t r i n g s ; e a c h p o l e - p l a t e s h a v i n g
t h e r e o n
‘ p o r t i o n s
f o r m e d
‘ w i t h s t r i n g accommo
d a t i n g h o l e s , ' t h e
h o l e s i n
t h e
s a i d p o r t i o n s
b e i n g
1 axially a l i g n e d and
v r e s p o n d i n g . s t r i n g ' s
arranged
t o r e c e i v e t h e c o r
i n c o n c e n t r i c a l l y spaced
a r
rangement
w h i l e t h e
s t r i n g s
a r e a t r e s t , t h e s a i d
h o l e s b e i n g c i r c u l a r
a n d
p r o p o r t i o n e d i n d i a m e t e r
i n a c c o r d a n c e with t h e
s i z e and
a m p l i t u d e o f
v i b r a t i o n o f t h e
i n d i v i d u a l
s t r i n g s . and c o n n e c t e d
v o n
s a i d
p o r t i o n s .
4 .
In
a m u s i c a l
i n s t r u m e n t , ’
a p l u r a l i t y
o f
mag
n e t i z a b l e s t r i n g s
a r r a n g e d
i n
s i d e by s i d e
s p a c e d
r e l a t i o n , an e l e c t r i c a l p i c k - u p u n i t c o m p r i s i n g a
h o r s e - s h o e
p e r m a n e n t m a g n e t h a v i n g
t w o s u b
s t a n t i a l l y
p a r a l l e l l y s p a c e d
l e g s , s a i d l e g s b e i n g
s u b s t a n t i a l l y equally
spaced from
o n e
s i d e o f s a i d
p l u r a l i t y
o f
s t r i n g s ,
s a i d l e g s
e x t e n d i n g ‘ t r a n s
v e r s e l y w i t h r e s p e c t t o
t h e l e n g t h
o f
t h e s t r i n g s ,
s p a c e d
a l o n g
e a c h
l e g o f
n u m b e r ‘ o f s t r i n g s , v s a i d p 0 l e ‘ _ - p i e c e s p r o j e c t i n g
from
t h e l e g s
o f
t h e magnet
i n t h e
d i r e c t i o n o f
t h e s t r i n g s and b e i n g a l i g n e d i n ‘ p a i r s
w i t h
r e
s p e c t t o
t h e i n d i v i d u a l
s t r i n g s ,
the
p o l e - p i e c e s o f
. 7 0
v e a c h p a i r v
b e i n g f o r m e d
w i t h
s t r i n g
accommo
d a t i n g o p e n i n g s
w h e r e b y
e a c h
s t r i n g
p a s s e s
through
t h e
openings i n tw o p o l e - p i e c e s o f o p
posi te
magnetic
polarity.
5 . I n
a
m u s i c a l i n s t r u m e n t , a p l u r a l i t y
o f
mag
n e t i z a b l e s t r i n g s a r r a n g e d i n s i d e b y s i e s p a c e d
r e l a t i o n _ ; a n ' e l e c t r i c a l p i c k - u p u n i t c o m p r i s i n g a
e
8/15/2019 US Patent 2,262,335, entitled "Musical Instrument" to inventor Russell, issued 1941.
6/6
2 , 2 e 2 , s s s
h o r s e - s h o e permanent magnet
h a v i n g t w o s u b
s t a n t i a l l y
p a r a l l e l l y s p a c e d l e g s , s a i d
l e g s b e i n g
s u b s t a n t i a l l y e q u a l l y
spaced
from one s i d e o f s a i d
p l u r a l i t y o f s t r i n g s , s a i d l e g s e x t e n d i n g t r a n s
v e r s e l y w i t h r e s p e c t t o t h e l e n g t h o f
t h e
s t r i n g s ,
i n d i v i d u a l p o l e - p i e c e s s p a c e d
a l o n g
e a c h l e g
o f
t h e
magnet
and c o r r e s p o n d i n g i n n um be r t o
t h e
n um be r
o f s t r i n g s , s a i d p o l e - p ie c e s p r o j e c t i n g
irom the l e g s o f the magnet i n t h e d i r e c t i o n o f
t h e s t r i n g s and b e i n g a l i g n e d i n p a i r s with
r e
s p e c t
t o
t h e
i n d i v i d u a l
s t r i n g s ,
t h e
p o l e - p i e c e s
o f each p a i r b e i n g
formed
w i t h s t r i n g ac c o mm o
d a t i n g o p e n i n g s
whereby
each s t r i n g p a s s e s
through
t h e
o p e n i n g s i n
two
p o l e - p i e c e s o f oppo
s i t e
m a g n e t i c
p o l a r i t y , t h e o p e n i n g s
i n
t h e p a i r e d
p o l e - p i e c e s
b e i n g c i r c u l a r and c o n c e n t r i c
w i t h
r e s p e c t t o t h e s t r i n g e x t e n d i n g
t h e r e t h r o u g h
w h i l e t h e s t r i n g i s
a t
r e s t , t h e d i a m e t e r s
o f
t h e
o p e n i n g s
b e i n g p r o p o r t i o n e d
t o
t h e d i a m e t e r 0 1 '
t h e s t r i n g s
and
t h e
a m p l i t u d e o f
t h e i r
v i b r a t i o n s .
6 . In a
musical
instrument
a
p l u r a l i t y o f mag
n e t i z a b l e
s t r i n g s
a r r a n g e d i n s i d e
by s i d e
s p a c e d
relation, an e l e c t r i c a l p i c k - u p u ni t
c o m p r i s i n g a
3
h o r s e - s h o e permanent
magnet h a v i n g
t w o
s u b
s t a n t i a l l y
p a r a l l e l y
s p a c e d l e g s , s a i d l e g s b e i n g
s u b s t a n t i a l l y e q u a l l y
spaced
from one s i d e o f s a i d
p l u r a l i t y
o f
s t r i n g s ,
s a i d
l e g s e x t e n d i n g t r a n s
v e r s e l y with r e s p e c t t o
t h e
l e n g t h 0 t h e s t r i n g s ,
i n d i v i d u a l
p o l e - p i e c e s
s p a c e d a l o n g e a c h l e g o f
t h e magnet and c o r r e s p o n d i n g i n number t o t h e
n um be r
o f
s t r i n g s ,
s a i d
p o l e - p i e c e s
p r o j e c t i n g
from t h e l e g s
0 1
t h e magnet
i n
t h e d i r e c t i o n o f
t h e s t r i n g s and b e i n g a l i g n e d i n
p a i r s with r e
s p e c t t o
t h e
i n d i v i d u a l s t r i n g s ,
t h e
p o l e - p i e c e s o f
e a c h p a i r
b e i n g
formed w i t h s t r i n g accommodat
i n g o p e n i n g s whereby
each
s t r i n g p a s s e s through
t h e o p e n i n g s i n
two
p o l e - p i e c e s o f
o p p o s i t e mag
n e t i c p o l a r i t y ,
a m a g n e t i z a b l e
p o l e - p l a t e
s e c u r e d
t o
each l e g
o f t h e magnet and
s t r u c t u r a l l y
and
m a g n e t i c a l l y c o n n e c t i n g t he c o r r e s p o n d i n g p o l e
p i e c e s t o the l e g s
o f
t h e
magnet,
and a
c o i l
w o u n d around
each
0 1 ' s a i d p o l e - p l a t e s
between
t h e
r e l a t e d
p o l e - p i e c e s and t h e r e l a t e d magnet
l e g .
CLARENCE W. RUSSELL.