U.S. patent number 3,860,755 [Application Number 05/394,360] was granted by the patent office on 1975-01-14 for novel portable amplifier and speaker.
Invention is credited to Richard P. Edlund, Wayne L. Kimbell.
United States Patent |
3,860,755 |
Kimbell , et al. |
January 14, 1975 |
NOVEL PORTABLE AMPLIFIER AND SPEAKER
Abstract
A portable amplifier is described which comprises a housing
having two pivotally interconnected or hinged housing sections. One
housing subsection contains a speaker and electrical input jack or
connection for a musical instrument, volume control switch and
batteries. The other subsection contains an A.C. converter and
amplifier. Because the housing is made in two separate hinged
sections, each housing section may be angularly spaced from the
other at a predetermined distance of up to 180.degree.. The
components just-mentioned are placed within their respective
sub-sections with appropriate wiring so that these components and
wiring are completely exposed, and available for repair, when the
sub-sections are opened to approximately 180.degree.. It is also
found, quite unexpectedly, that when opening the housing sections
to an angularly spaced condition, a special unusual musical effect,
best described as an acoustic wah-wah effect, is provided by a
musical instrument which is electrically connected to the
amplifier. The angular spacing between the housing subunits may be
varied manually or may be readily varied by spring-loading the
housing sections such that they are normally urged apart to an
optimum angular spacing of between about 5-40.degree., when the
housing sections are unlocked.
Inventors: |
Kimbell; Wayne L. (Los Angeles,
CA), Edlund; Richard P. (Los Angeles, CA) |
Family
ID: |
26926644 |
Appl.
No.: |
05/394,360 |
Filed: |
September 4, 1973 |
Related U.S. Patent Documents
|
|
|
|
|
|
|
Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
|
233134 |
Mar 9, 1972 |
|
|
|
|
Current U.S.
Class: |
381/109; 181/155;
381/120 |
Current CPC
Class: |
H04R
1/021 (20130101) |
Current International
Class: |
H04R
1/02 (20060101); H04r 001/28 () |
Field of
Search: |
;179/1E,1A,1AT,1J
;181/31B ;84/1.24,1.27,3,23 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Cooper; William C.
Assistant Examiner: Olms; Douglas W.
Attorney, Agent or Firm: Drucker; I. Morley
Parent Case Text
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part application of now
abandoned Ser. No. 233,134, filed Mar. 9, 1972 and entitled
"PORTABLE AMPLIFIER AND SPEAKER."
Claims
We claim:
1. A portable amplified-speaker for musical instruments and the
like comprising:
a housing means consisting of two sections only, each of said two
sections having lowermost surface means adapted to rest on ground
surface;
an amplifier mounted in one of the sections of said housing
means;
a speaker mounted in one of said sections of said housing means
with the rear of said speaker facing said other section;
a volume switch mounted on the external surface of said housing
means;
a jack opening is provided on said housing means, as an electrical
input point for musical instruments;
electrical wiring interconnecting amplifier, speaker, switch and
jack opening;
means for providing electrical power to said amplifier mounted in
one of said housing sections; and
means for pivotally interconnecting said two sections of said
housing means along an adjacent pair of vertical edges of said
housing means so as to allow said sections to be angularly spread
on said ground surface any variable distance of from 0.degree. to
about 180.degree., to thereby allow for an adjustable spacing
during operation between the rear of the speakers and the other
section of said housing means, said speaker, amplifier and power
source being so placed within said housing means so that upon
spreading of said sections of said housing means approximately
180.degree., all of said speaker, amplifier and power source are
exposed for complete access.
2. The portable amplifier and speaker of claim 1 wherein a spring
means is mounted between said two sections and urging said sections
apart to a predetermined angular spacing of substantially less than
180.degree..
3. The portable amplifier and speaker of claim 1 wherein said
housing means are provided with a releasable fastener means to
releasably fasten both sections together.
4. The portable amplifier and speaker according to claim 1, in
which said housing means is provided with a carrying means attached
to its external surface.
5. A portable amplifier and speaker of claim 1 wherein said housing
section, which does not contain said speaker, is provided with a
panel which is an integral part of the exterior face of said
section and which is pivotally connected at its lower end to a part
of said section and which, when angularly spaced from said housing
section, enables air communication to the rear of said speaker.
Description
BRIEF SUMMARY OF THE INVENTION
This invention relates to a novel form of housing for a portable
amplifier and speaker. The housing comprises two pivotally
interconnected, or hinged, housing sections, these sections
together containing an amplifier speaker, A.C. convertor,
batteries, volume control switch and input jack. The sections are
hinged along adjacent vertical edges of the housing sections so
that the housing sections can be spread up to approximately
180.degree. apart, or can be readily spread apart to any angular
distance therebetween. The readily obtainable intermediate angular
spacing of the housing sections is important in order to achieve a
specific distorted musical effect, best described as a wah-wah
effect. The approximately 180.degree. spacing is required so that
all components within the housing sections are completely exposed
for easy repair, adjustment or replacement.
Furthermore, the mode of pivotal interconnection of the housing
sections enables a spring means to be mounted between the housing
sections so that they can be urged apart to a predetermined angular
spacing, and readily moved from said spacing by a musician during
the playing of a musical instrument electrically connected to the
portable amplifier and speaker.
BACKGROUND OF THE INVENTION
The applicant calls attention to the following prior Letters Patent
which is representative of the portable amplifier art:
Neil 3,126,450 March 24, 1964 Staunton 1,953,135 April 3, 1934 De
Boer 2,610,694 September 16, 1952 Peevey 3,151,699 October 6, 1964
Round 1,904,537 April 18, 1933 French Patent to 321,178 April 30,
1957 Paillard, S. A.
None of this art discloses an adjustable openability of a
self-contained amplfier-speaker unit for the multiple purposes of
attaining easy accessability to the electronic components, for
compactness, and for producing special musical sound effects.
DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of the amplifier speaker unit in a
closed state;
FIG. 2 is another perspective view of the unit of FIG. 1 viewed
from the right hand side thereof, and in a partially opened
state;
FIG. 3 is a front view of the unit of FIG. 2 in a completely open
state, showing all interior components and their interconnecting
wiring;
FIG. 4 is a top plan view of a modified form of the
amplifier-speaker unit of FIG. 1; and
FIG. 5 is a perspective view of a second modified form of the
amplifier speaker of FIG. 1.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to FIGS. 1-3, in particular, this invention relates to a
compact portable self-contained amplifier-speaker unit 10, which is
contained within a pivotally interconnected pair of housings. The
unit is preferably battery powered or may have a rechargeable unit
of conventional construction and is, generally speaking, intended
for the entertainment of small audiences. The unit 10 may also be
used for recording sessions or concerts due to its unique tonal
quality by placing a microphone in proximity to it.
It is a major object of the invention to provide a novel
construction of a carrying case or housing which houses the
amplifier-speaker unit, so as to bring about a unique musical
effect which may be distorted, and which distorted sound may be
easily varied.
It is a further object of the invention to provide a very light
unit, which is highly compact, and which permits its ready
portability.
It is another object of the invention, as shown specifically in
FIGS. 1-3, to provide an amplifier-speaker, system in which all of
the components thereof are easily accessible, and in which the
electronic components may be modular units for easy replacement or
substitution of other sizes of amplifier, speaker, etc.
With reference to the drawings, the amplifier-speaker housing, as
illustrated in FIG. 1, preferably comprises a case 10 having
dimensions which may vary between approximately 8 to 14 inches in
height, 4 to 6 inches in thickness, and 6 to 12 inches in width.
The case 10 is divided into two housing sections 12 and 14, and is
pivotally interconnected along one side by means of hinges 16. The
housing sections may be constructed of wood, plastic, metal, or
other conventionally used materials. The handle 18, affixed onto
the top of the housing section 14, facilitates the carrying of the
unit 10. A speaker grill outlet is disposed in the front of housing
section 12. The external portions of a combination on-off and
volume switch 27, and input jack 24 are shown in FIGS. 1 and 2 of
the drawings, situated below speaker outlet 20. The switch 27 is in
the form of a pig's nose, but, of course, other forms of switch 27
can be employed.
In FIG. 2, a snap-opening lock attachment 26, 26a is shown which
secures housing sections 12 and 14, together, when required, e.g.,
as for transportation.
In FIG. 3, the components of the amplifier and speaker unit are
shown. In the right-hand housing section 14 are placed the
amplifier 29 (which is transistorized) an alternating current
convertor 80, and an extension cord 84 and input jack 84a. In the
left-hand housing section 12, there is mounted a speaker 30, dry
cell batteries 28, and the casing 85 for the volume switch 27 and
input jack opening 24. The components 24, 27, 28, 29, 30, 80 and 84
are wired together in a conventional manner. In this connection, it
should be noted that if it is not desired to utilize the batteries
28 as the source of electrical power for the speaker 30, amplifier
29, the A.C. converter 80 may be employed. Convertor 80 carries an
electrical plug outlet 87 (see FIGS. 3 and 4) and is removable from
housing section 14 and can be plugged into a conventional 110V-115
V electrical wall outlet carrying alternating current. When the
A.C. convertor 80 is employed, its input jack 84a is plugged into
amplifier 29 (in opening 88 thereof) so that it will power the
amplifier 29 and speaker, and simultaneously cut out the operation
of the batteries 28 in a conventional manner. The input jack of the
musical instrument to be played is then plugged into electrical
input opening 24 of amplifier 29.
A pre-amp circuit can be incorporated into amplifier 29. In this
event, an electrical input opening 89 is provided for connection of
the pre-amp circuit to an auxiliary amplifier and speaker system to
further amplify the portable amplifier and speaker 10 of this
invention, if desired. Electrical input openings 88, 89 are
preferably provided on the external face of housing section 14. The
speaker 30 is located substantially in the upper portion of housing
section 14, adding to the compactness of the unit in that the
speaker 30 and amplifier 29 will not spatially interfere with one
another when the case 10 is closed.
The unique construction as shown in FIGS. 1-3 consists primarily in
placing the amplifier 29 and speaker 30 in hingedly, or otherwise
pivotally, interconnecting sections 12 and 14, respectively,
thereby permitting an angularly adjustable spacing of housing
sections 12 and 14 and of the components contained therein to any
degree between 0.degree. and 180.degree. to thereby achieve subtle
tonal effects which arises from varying the amounts of air passing
by the rear of the speaker 30. The hinging of sections 12 and 14
occurs along adjacent vertical edges of the said sections thereby
permitting the sections 12, 14 to be readily angularly spaced from
each other. The bottoms of the sections 12, 14 may, if desired, be
provided with wheels or glides (not shown) to facilitate movement
of the sections with respect to each other, up to about 180.degree.
in angular distance.
The relative spacing of the housing sections 12, 14 is found to
produce a special and unusual sound quality, best described as an
acoustic wah-wah effect, which is pleasing to the ear, even though
it distorts the regular sound produced by conventional
amplifier-speaker systems. This wah-wah sound is further manipulatd
either manually, as shown in FIG. 3, or by a spring-actuated
mechanism to be described in FIG. 4, by simply adjusting the
angular spacing or angular position between the two hinged housing
sections 12, 14, rapidly or slowly, as the musician's instrument is
being played and amplified through the amplifier-speaker unit 10 of
this invention.
The input jack opening 24 serves as the insert point for
electrically connecting musical instruments, such as a guitar, to
the amplifier.
The operation of the unit shown in FIGS. 1-3 is very simple. The
musical instrument (not shown in the drawing) is connected to the
unit 10 by way of input jack opening 24. The amplifier 29 (which,
for example, has 1-10 watts of peak power) is switched on, by
switch 27 which, in this particular embodiment is formed in the
shape of a pig's nose. The two housing sections 12 and 14 are then
unlocked and opened and spaced at a distance which will produce the
desired sound effect. In order to vary the sound effects, the
musician may vary the spacing with one foot as he continues to play
the instrument, plugged into input jack 24, with his hands. The
source of electrical power may be the batteries 28 on the A.C.
convertor, as explained previously. If an auxilliary
speaker-amplifier system is to be employed then electrical
connection to it, is made by electrically connecting such
auxilliary system to the pre-amp output 89.
The location of speaker 30 and amplifier 29 in the two different
housing sections also contributes compactness, and easier
accessibility to the unit 10 for the purposes of replacement of
like electronic components, or other components which are built on
the same module as the basic components utilized herein. Complete
accessibility to all of the electronic components of the unit is
provided when the housing sections are angularly spaced
approximately 90.degree.-180.degree..
The portable-amplifier speaker unit 10 can be carried over the
shoulder of the user, if desired, by fastening the ends of a
shoulder strap to knobs 90 affixed to the sides of housing section
14.
Referring now to the modification shown in FIG. 4, the arrangement
of electronic components within housing units 12a and 14a, and
their interrelationship, is the same as shown and described in
FIGS. 1-3. However, a narrow (e.g., 1/4-1/2 inch in width) curved,
leaf spring 45 is mounted in, or near the top of, the housing 10a
with one end thereof, 45a being retained, by conventional
fasteners, within housing subunit 12a, and the other end freely
abutting the wall of housing subunit 14a, at a point designated by
the numeral 52. Numerals 54, 56 designate the same type of
snap-fastener lock shown at 26, 26a of FIGS. 1-3.
When the housing units 12a-14a, are unlocked, the normal angular
spacing of the housing units is approximately 10.degree. due to the
force exerted by spring 45, although it will be understood that the
normal angle achieved under the urging of spring 45 may be varied
considerably depending upon the strength and configuration of the
spring employed. In this modification, the ease with which the
angular spacing may be varied from its normal spacing or opening is
increased over that form shown in FIGS. 1-3, and may be preferred
in those instances wherein the musician wishes to vary the spacing
quickly and easily with his foot while playing the musical
instrument with both hands.
Referring now to the modification shown in FIG. 5, another form of
easily adjustably varying the volume of air passing behind the rear
of the speaker is shown. In FIG. 5, the housing subunit 10b houses
all of the electronic components heretofore described in FIGS. 1-3.
In FIG. 5, the speaker is located on the side not shown in the
drawing, but is generally identified, in dotted line, by the
numeral 30b. The housing 10b is shown subdivided into two pivotally
interconnected subunits, as described in FIGS. 1-3, but also may be
constructed as a single unit having a conventional screw-in
fastener rear panel for accessibility (not shown). The significant
modification shown in FIG. 5 pertains to the provision of a rear
panel 42 hinged, or otherwise pivotally, interconnected, to a rear
opening 60 in housing 10b. Panel 42 may be thought of as a housing
subsection since it, together with housing 10b, completely contains
the amplifier and speaker. The panel 42 may be constructed, for
example, of wood, plastic, or metal, and is maintained in a normal
angular relationship with respect to housing 10b by coil spring 46.
Communication with the interior of the housing 10b and with speaker
30b is achieved, directly through opening 60 or through a grill
cloth 62 covering rear opening 60.
In either case, the angular spacing between the interior of the
housing 10b (and speaker 30b contained therein) and the rear panel
42 may be easily varied by either depressing a flange or pedal 44,
mounted to rear panel 42, (thereby enlarging the angular spacing)
or by releasing the flange or pedal 44, or forcing panel 42
inwardly from its normal position. In this manner, the amount of
air passing or moving through the housing 10b and behind the
speaker 30b may be quickly and easily varied, (by foot, if desired)
to create the unique wah-wah effect heretofore described. A
conventional tongue lock or fastener 50 is provided to lock rear
panel 42 to housing 10b, if conventional amplification is
desired.
The spring 45 (in FIG. 4) or spring 46 (FIG. 5) while shown
angularly spacing the housing subsections normally apart about
10.degree., could readily have its normal spacing varying between
about 5.degree. and 40.degree. under the influence of the
spring.
While the foregoing has illustrated and described what is now
contemplated to be the best mode of carrying out the invention, the
construction is, of course, subject to modification without
departing from the spirit and scope of the invention. For example,
clip means for fastening the amplifier-speaker of this invention to
the clothing of the musician may be employed. Therefore, it is not
desired to restrict the invention to the particular form of
construction illustrated and described, but to cover all
modifications that may fall within the scope of the appended
claims.
* * * * *