|Publication number||US2474386 A|
|Publication date||Jun 28, 1949|
|Filing date||Jun 19, 1944|
|Priority date||Jun 19, 1944|
|Publication number||US 2474386 A, US 2474386A, US-A-2474386, US2474386 A, US2474386A|
|Original Assignee||John Volkmann|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (7), Referenced by (11), Classifications (8)|
|External Links: USPTO, USPTO Assignment, Espacenet|
June 28, 1949. 1 VQLKMANN l 2,474,386
HEADBAND AND EARPHONE MOUNTING Filed Julie 19, 1944 therethrough. These slots are of a width to loosely receive and retain vertical coaxial trunnion studs 26 formed integrally on the upper and lower edges of the arm I2 near the extremity of the latter, and the slots are elongated in a direction normal to the plate I8. At the central part of the pla-te I8 a nodular bearing member 2&3 is pressed outward from the material of the plate. During the use of the device, these nodules serve as point thrust bearings against which the hat surfaces of the arms I2 may bear and pivot uni versally while pressing the ear phones to the head of the user. When the head set is removed from the head of the user, the thrust bearing nodule 29 does not function materially, as the arm I2 may be free therefrom entirely when both trunnion lugs are in the outer parts of the slots. The earphones in the latter case may have greater scope of horizontal pivotal movement, enabling more ready initial adjustment of the device on the head.
It may be seen from Figure l, that the planiform rear portion of each arm I2 is offset from its junction with the head band, and that this offset is approximately the same as the lesser thickness of the head phone and socket piece I6, so that when the device is fitted to the ear, the arm I2 is close to the thinner part of the ear phone unit. This further minimizes the space required for the device within a helmet, and allows free spring action of the headband in which its ends are somewhat sprung apart by the reaction of the arms I2 when the head of a user is interposed. At such times the forward portions of the arms I2 are usually spaced further from the forward parts of the earphone units.
The headband structure permits adjustment of the earphone sockets in several different respects. The length of the headband, and consequently the spacing of the earphone sockets from the top of the headband, may be varied by movement of the arms 4 in the ends of the headband. The headband itself, being of a resilient character, allows the earphone sockets to be moved away from one another along the interaural axis. In this movement the end portions of the headband function as torsion springs at the same time that they press the earphones inward by stress components acting linearly in the major plane of the band; the band ends being slightly separated further from their normal relative free positions. The torsion function of the head band lessens the pressure on the ears of the user which might otherwise be exerted by the full inward force available at the ends of the head band. The loosely held arrangement of the trunnion studs 26 in the slotted ears of the frame plate I8 permits movement of the earphone socket around the axis of the studs through a limited arc of rotation in a horizontal plane passing through the interaural axis. At the same time, the studs on the curved arms are free to move in and out in the slots of the sides 22 with the ends of the arms lying in contact with the round bearings 28, a universal pivot effect being thus attained.
A feature of the movement of the earphone socket as permitted by the structure described is the limited character of the movement, such as is indicated by the dotted line position illustrated in Fig. 1. The earphone sockets are prevented from being rotated through a complete circle or into a position where manipulative adjustment is necessary before placing the headband over the head. The limited arc of rotation in both vertical and horizontal planes permits sufficient freedom of movement to make satisfactory and accurate adjustment for different size heads, and yet the earphone sockets are constantly held in a substantially ready position.
Another feature of the invention consists in the fact that the arms I2 apply pressure on the point bearings 28 centrally of the earphones themselves. The ends of the arms are also (by reason of the separating movement of the ends of the band) prevented from pressing against the sides of the head when the band is contacted by a helmet or other agency. It is also pointed out that the curved arms I2 extend rearwardly from a distance in front of the interaural axis and incline inwardly toward one another at their rear parts, so that the sockets I6 normally tend to cling to the ears. This gives a more accurate lit and allows the earphone sockets to be quickly located in a correct position over the ears.
It will be seen that I have provided a simple and eicient device for supporting earphone sockets from arms which extend backwardly from a headband, thus presenting a compact arrang^ ment about which a helmet may be easily positioned. Adjustable features are also included which provide for comfort, ease in installation, and various other advantages.
While I have shown a preferred embodiment of my invention, it should be understood that various changes and modifications may be resorted to, in keeping with the spirit of the invenu tion as defined by the appended claims.
1. A headband and earphone mounting conin prising a flat steel spring headband of inverted U-shape constructed and shaped to engage over and across the head of a person with its ends planiform and parallel at the sides of the head of, and forwardly of the ears of the person, L-shaped adjustable slides having broad, at arms, one in a plane with and telescopically engaged with the respective end of the headband, the other arm of the slide 'being extended laterally outwardly from the plane of the end of the head band and thence rearwardly to form a horizontal planiform earphone support arm broadened in a vertical plane offset from the plane of the adjacent end of the head band and convergent rearwardly theretoward, coaxial vertical studlike trunnions formed at the upper and lower edges of the earphone support arm, an earphone frame plate member constructed for xed attachment to the outer side of an earphone, upper and lower parallel ears formed thereon slightly above and below the earphone support arm, and having respective slots therein to receive loosely therethrough respective trunnions, the slots being both elongated in a direction normal to the plane of the plate a distance sucient for limited sliding movement of the trunnions therein whereby an earphone on the plate may pivot on a horizontal axis through an angle limited by engagement of the trunnions at the ends of said slots, said trunnions 4being revoluble on their axis in the slots, said offset arm being extended beyond said axis a distance sufficient to limit rocking of a mounted earphone on said trunnion axis as required.
2. An improved article of manufacture, as a combined earphone and microphone support, the structure of claim 1 wherein a planiform forward enlargement is formed at the junction of the arms of the slide, and a separable fastener member thereon.
3. The structure of claim 1 in which an earphone is included having head-fitting cushion elements, the cushion elements being thicker at' their rear portions so that when in use the ear phones are inclined in planes convergent forwardly to the planes of the ends of the head band, and the olset of the planiform part of said earphone support arm is substantially the same as the lesser thickness of the earphone and cushion assembly.
4. The structure of claim 1 wherein a nodule is pressed in the said frame plate toward the said support arm, whereby the flat side of the latter may press upon the nodule as a universal pivot thrust bearing.
6 REFERENCES CITED The following referenlces are of record in the le of this patent:
UNITED STATES PATENTS Number Name Date 911,178 Sullivan Feb. 2, 1909 1,452,851 Schmidt Apr. 24, 1923 1,573,839 Lech Feb. 23, 1926 1,579,412 Stenberg Apr. 6, 1926 2,337,953 Wirsching Dec. 28, 1943 FOREIGN PATENTS Number Country Date 353,758 Germany May 24, 1922 439,808 Germany Jan. 19, 1927
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|U.S. Classification||381/378, 379/430, D14/205, 381/379|
|International Classification||A42B3/16, A42B3/04|