US Patent 2,262,335, entitled "Musical Instrument" to inventor Russell, issued 1941.

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 ?


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 ?


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


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.


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


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


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


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


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 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


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


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.

US Patent 2,262,335, entitled "Musical Instrument" to inventor Russell, issued 1941.

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Transcript of US Patent 2,262,335, entitled "Musical Instrument" to inventor Russell, issued 1941.