Abstract:
A tape cassette of a relatively small size for use in portable tape devices and the like. The cassette is formed out of two displaceable sections containing respective winding spools for the tape wherein in the sections move from a first position in which the cassette is relatively small to a second or expanded position wherein the cassette can be used in a larger tape device. A receiving container is provided adapted to receive the tape cassette to provide an outer dimension of a larger size, such as that utilizable in a standard video player/recorder.

Description:
FIELD OF THE INVENTION 
     The present invention relates to a tape cassette cartridge more particularly a cassette that is adaptable for both a standard and portable recording and playing device. 
     BACKGROUND OF THE INVENTION 
     The use of magnetic tape cassettes and the like have ever increasing recent applications, the more recent of which is in video recording and playback. Usually the size of a magnetic tape recording and playback device substantially depends upon the size of the cassette used. With the increasing minitaturization of electronic parts (IC&#39;s etc.) and accordingly the recording and playback devices, ever smaller cassettes can be utilized. This can be seen in the small audio recorders presently on the market. 
     So to, in the video area, where handheld portable video recorders are available which, with the assistance of a video camera, allows for video recording. In such situations, a prolonged recording is often not involved so that a small cassette may be utilized. Accordingly, such portable devices are reduced in size and geared towards utilizing the relatively small cassettes. 
     As compared, in a large playback magnetic device, such as a home video device, a long play duration of the cassette is more often the case, as in movie cassettes, etc. Accordingly, in such a situation a minimum or larger standard size cassette is utilized. 
     Due to the different purposes of the magnetic tape devices, i.e., the portable recorder versus the home display, there has resulted in cassettes of one size being utilized in one and of another size in the other. The desire to have the portable video record somewhat small in nature has resulted in the use of a small standardized cassette. Whereas in the home video playback device, a larger standardized cassette is utilized. This leads to the result that the cassettes are not interchangeable between the devices, or requires that the portable device utilize a relatively large cassette, defeating an objective of the device. 
     Accordingly, it has become desirable to allow cassettes of the smaller, portable use type to be utilized in devices which normally take a larger standardized cassette. In this regard, there presently exists an adapter which is used to allow the smaller cassettes to be played in devices which use the larger cassettes. However, this adaptor is very complicated requiring gear transmission to equalize the tape winding distances and accordingly are very expensive, limiting their application. 
     SUMMARY OF THE INVENTION 
     Accordingly, it is an object of the invention to provide for a tape cassette which can be utilized in both a small or portable as well as a large tape player and recorder, such as a home video device, which is relatively simple in design, construction and implementation. 
     In this regard, the present invention provides for a magnetic tape cassette having a relatively small, substantially square shape body, containing two winding spools, for the magnetic tape. The body is formed of two displaceable half sections which when abutting each other is of a size standardly used in portable recording devices such as a video recorder and camera etc. A guide means connects the two half sections in the form of a hollow rectangular tube which allows the sections to be slidably displaced from each other so as to increase the overall length of the cassette. This readily allows its use in a magnetic tape device which utilizes larger size cassettes wherein the winding drives are at an increased distance from each other. In the case of the home video devices and the like, a receiving container may be utilized with the cassette placed therein to conform to the outer dimensions required. Thus the present invention provides for complete interchangeability of the smaller size cassettes in tape devices made for the larger size cassettes. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The aforenoted object and advantages and others are realized by the present invention, the description of which should be taken in conjunction with the drawings wherein: 
     FIG. 1 is a top plan view of the tape cassette incorporating the teachings of the present invention; 
     FIG. 2 is a top plan partially phantom view of the tape cassette in an expanded position; and 
     FIG. 3 is a top plan partially phantom view of the tape cassette in a tape container. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     With reference to the Figures, a tape cassette 10 is provided for magnetic tape and the like, and is illustrated in FIG. 1 as having a substantially square standard shape such as that which may be utilized in a portable device, etc. The tape cassette 10 consists of two half-sections 11 and 12 which are basically mirror symmetric with respect to each other. Respective winding spools 13 or 14 are disposed within half section 11 and 12. An opening or recess 15 is provided at one side of the tape cassette 10 for the recording/playback or the eraser head of the recording or playing device. The opening 15 may partially extend to the large faced broad side of the tape cassette 10 as shown. The magnetic tape 16 in the cassette 10 is guided by way of standard or typical guides in recess 15 along a longitudinal edge of the tape cassette 10, for engagement with the recording/playback or the eraser head when inserted into the device. The operation of the cassette 10 would be typical of cassettes presently used and as aforenoted could be a portable device generally utilizing a smaller cassette than that utilized in a home video system. 
     Turning now to FIG. 2 this illustrates the tape cassette 10 in a pulled out or expanded state. The tape winders 13 and 14 are displaced to a distance from each other corresponding to a larger standard cassette winding drive means utilized in the larger tape devices. This is achieved by a substantially hollow tubular guide section 17 having a rectangular cross section which, as shown, is connected to the inner wall of the half section 11 while is guided along the inner wall of the other half section 12. The length of the guide section 17 is preferably such that the tape cassette 10 in its pulled out state still has a sufficient overlap between the guiding section 17 and the inner wall of half section 12 for stability and support. Note that in the collapsed or retracted state, guide section 17 adds to the overall strength of the tape cassette 10. 
     A recess 18 in the hollow tubular guide section 17 and prevents the interfering of the guide section 17 with the operation of winding spool 14. 
     In the retracted state of the magnet cassette 10 as shown in FIG. 2, two oppositely disposed hook-like levers 19 and 20 engage respective protrusions 21 and 22 maintained by the cassette, thus locking the cassette in the retracted condition which is readily apparent from a review of the figures. These levers 19 and 20 are pivoted out of their locked position by pin like plungers 23 or 24. Of course, the illustrated levers 19 and 20 could also engage respective recesses of the opposite half section 11 or 12, if so desired. Note, an alternative to the plungers 23 and 24 position with respect to the levers 19 and 20 as shown in FIG. 2, that the plungers 23 and 24 may also be positioned vertically with respect to the pivot plane of levers 19 and 20 as shown in FIG. 3. In the former case, the levers 19 and 20 are pivoted by a push movement of the plungers 23 and 24 at a right angle to the direction of the levers 19 and 20&#39;s movement. In the latter situation, the levers 19 and 20 pivot via force on the plungers 23 or 24 via eye openings, in a parallel direction to that of the levers movement. Note that other means of coupling the two half sections 11 and 12 can be also implemented and will be readily apparent to those skilled in the art. Accordingly, the present means while preferred is by no means exclusive. 
     If the outer dimension tape cassette 10 in its pulled out state is still too small, with perhaps that of the standardized cassette to be used such as that of the video home device, a receiving container 25 may be utilized whose outer dimensions conform with the standardized dimensions of the larger normal cassette for insertion into the device. In this regard, two pivot arms 26 and 27 with respective tape feeding elements 28 and 29 are disposed within the receiving container 25. 
     In the rest position of the pivot levers 26 and 27, the tape feeding elements (28) and (29) depicted bracketed, are placed or positioned behind the tape (16) of the tape cassette 10. In operation, levers 26 and 27 pivot, i.e., by way of spring loading etc., to deflect in tape 16 to that as shown in FIG. 3. This causes the tape 16 to the same position as the tape in the larger standardized tape cassette. The completed unit formed by the receiving container 25 and the tape cassette 10 is therefore readily exchangeable with the standardized larger cassettes. In this form, it can be inserted into a large tape recording or playing device, such as a video home system without causing any problems. Note also that the receiving container 25 may also be provided with a removable lid or cover, if so desired. 
     Accordingly, it is readily apparent from the foregoing that the present invention enables the full use of the advantages of a small cassette in portable devices and simultaneously the use of such a cassette in a larger device such as a video home system. Also, by positioning the tape cassette 10 in the receiving container 25, it is possible to play a quarter inch tape cassette in a large playing/recording which takes half inch tape cassette, provided that the device is so designed that operates in the return or reverse operation and record or scans only half of the width of the tape at each run through. Thus, for example the compatibility between a portable recording device utilizing a quarter inch tape and a playback device with half inch tape is also realized. 
     In view of the foregoing, the present invention realizes its aforenoted object and advantages and others, and although a preferred embodiment has been disclosed and described in detail herein its scope should not be limited thereby, rather its scope should be determined by that of the pending claims.