US3046798A - Portable electrical apparatus - Google Patents

Description

July 31, 1962 TADAsHl rGARAsHl 3,046,798

PORTABLE ELECTRICAL APPARATUS Filed March 25, 1959 LJN/En fr j; /ayaras/w' United States Patent O 3,046,798 PGRTABLE ELECTRICAL APPARATUS Tadashi Igarashi, Tokyo, Japan, assigner to Sony Kabushikikaisha (Sony Corporation), Tokyo, Japan, a corporation of Japan Filed Mar. 25, 1959, Ser. No. 801,788 Claims priority, application Japan Apr. 23, 1958 3 Claims. (Cl. 74-10) This invention relates to a portable electrical apparatus, and more particularly to a transistor radio receiving set which is readily `operated by one hand.

An object of this invention is to provide a small and compact portable radio receiving apparatus using transistors, which is easily and simply assembled.

Another object of this invention is to provide a portable transistor radio receiving set in which tuning for the receiving frequency and the volume control for the output can be easily and simply selectively adjusted by the one hand grasping the set.

Other objects, features and advantages of this invention will -be more apparent from the following detailed description taken in connection with the accompanying drawing in which:

FIG. l illu-strates a fragmental sectional side View of the main part of a radio receiving apparatus -according to this invention, one part of a case being removed, and

FIG. 2 shows a perspective view of a portable radio receiving apparatus according to this invention held in the left hand.

Referring to the drawing, 1 is a case of a small radio receiving set and 2 a base lor partition plate located in the case 1. On the opposite sides of the base plate 2 are respectively mounted a variable capacitor 3 and a variable resistor R.

In accordance -With this invention a threaded shaft is formed on one side of a ange member 4 which supplies a casing in which an adjustable element, such as the variable resistor R, is enclosed. This shaft 5 is inserted into a hole 6 through the base plate 2. To the extended end of the threaded shaft 5 is screwed a block member or nut 7 which abuts against the opposite -face of the base plate 2. The ange member 4 is clamped on the other side face of the base plate 2.

The variable resistor R has an -adjusting shaft 8 for controlling its resistance and the nut 7 has an extended shaft 9 which is aligned with the shaft 8.

ln order to apply the above arrangement to a portable radio receiving set, a sleeve 11, which is preferably formed integrally with a pulley Vand a knob 10 is rotatably mounted on the shaft 9. This shaft which is connected to the shaft 16 of another adjustable element, such as the variable capacitor 3, by a lbelt which is put around the pulley 15 and the pulley 13 which is mounted on the shaft 16. On the shaft 8 is attached another knob 14, which serves to adjust the variable resistor R.

The knobs 10 and 14 are disposed substantially side by side in such a manner that fragmental parts of the rims of the knobs 10 and 14 project through to the outside of one face 17 of the case 1 through recesses 1S and 19 respectively and so that the thumb of the grasping hand can selectively change the projected parts of the rims of one of the knobs. 'Ihis permits rotation and a selective engagement lof both the variable capacitor 3 and the variable resistor R by the thumb of the grasping hand, as shown in FIG. 2.

Thus, according to this invention, the adjusting shafts S and 9, which are aligned with each other, are easily and simply mounted on the base plate 2 by the flange member 4 and the nut 7 which are disposed on the opposite faces `of the base plate 2. Accordingly, other com- Mice plicated arrangements can be dispensed with in the mounting of the shafts 8 and 9 on the base plate 2.

The total length of the aligned shafts Sand 9 is appreciably shortened so that the width of a case of such a radio receiving set can be reduced. Also the assembly a1'- rangement can be simplified.

It will be appreciated that this invention can be applied to various types of portable and small, hand held electrical apparatus, such as a wireless microphone or a hearing aid having adjustable means to be manually 'adjusted instead of the variable capacitor 3 and variable resistor R `as described hereinbefore.

This invention has an additional advantage in that the thumb of the hand which grasps the case can selectively engage and actuate the rim of the left knob 10 or the rim of the right knob 14, thereby enabling both tuning yand volume control of the portable radio set easily while the set is grasped in one hand.

While I have explained a particular embodiment of my invention, it will be understood, of course, that I do not Wish to be limited thereto since many modifications may be made and I, therefore, contemplate by the `appended claims to cover any such `modifications as fall within the spirit and scope of my invention.

What I claim is:

l. A small electrical -appliance having a generally rectangular and flat casing of a thin, pocket fitting thickness to be held in one hand and having two adjacent, independently manually operable controls, said casing having its internal thickness substantially equally -divided by an internal partitioning base plate secured to at least one end of said casing, a hole through Isaid base plate adjacent one end of -said casing, nut and bolt-like mean-s through said hole clamping said base plate therebetween and forming the sole mounting and rotary bearings for two coaxial and axially spaced apart control discs positioned one on each side of, and substantially parallel to, said partition plate, said casing having two Ispaced apart openings through its thin side adjacent said end `and said control discs having only small portions of their peripheries extending therethrough to be selectively thumb actuated.

2. A pocket portable electrical device comprising a ilat, hand held case of a thin thickness, an internal thick- .ness partitioning base plate secured in said case and having a hole therethrough adjacent one end of said case, a member having a male portion extending through said hole and an enlarged base plate engaging portion with an axially open cylindrical recess therein, a first adjustable control rotatively secured in said recess and having a thumb actuated, control `disc coaxially and directly connected thereto, a female member engaging said male portion, clamping the other face of said base plate, and having an outwardly extending shaft means, a second thumb actuated, control disc rotatably mounted on said shaft means and having means operatively connecting it to a second control, spaced holes through said casing, and only small portions of the peripheries of said control discs projecting therethrough in side by side but axially spaced relation to be selectively engaged by the thumb of the hand holding the said device.

3. A pocket portable receiving radio comprising a hat, generally rectangular, and hand held case of a small and pocket fitting thickness having an internal, thickness dividing, partition plate secured therein and having =a hole therethrough adjacent one end of said case, ya bolt-like member having an enlarged flange clampingly engaging said plate and axially open to provide a cylindrical recess, a first rotatively adjustable control in said recess, a thumb actuated disk connected thereto, a threaded shaft extension of said bolt-like member extending -through said hole, a ,nut-like member screwed thereon, clampingly engagng said plate, and having an yaxial shaft extension ooxrialwith `Said cylindrical recess, a corbined thumb `actuated disc and second control actuating member rotat- ,able onsaid'shaft, a second control member operatively oonuected thereto, Aopenings 'n said casing adjacent one `end thereof, #and said ,thumb actuated discs extending onLy 'pantially through .said openings.

References Cited in the le of this patent UNITED `STATES PATE-NTS Hollerith June 13, 1933 Schur `June 3, "1941 Patterson Nov. 6, 1945 Patino Mar. 5, 1946 Youhouse Aug. 2, 1949 Corso et al Aug. 14, 1951 Giardina Sept. 27, 1955 Turner Jan. 15, 1957 FOREIGN PATENTS Germany Apr. 2, 1932 OTHER REFERENCES Pocket'Radio, page 54.

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