Abstract:
A combined wristwatch and radiotelephone has a portion such as a wristband which typically remains on the user&#39;s wrist, and a timekeeping and radiotelephone portion which is typically removable from the portion that remains on the wrist. The wristwatch and radiotelephone portion is reconfigurable between a relatively compact form in which it is suitable for wearing on the wrist as a wristwatch, and a more elongated form in which it is suitable for use as a hand-held radiotelephone with a microphone and speaker spaced sufficiently far apart to permit simultaneous use of those components adjacent the user&#39;s mouth and ear.

Description:
BACKGROUND OF THE INVENTION 
     This invention relates to a combined wristwatch and radiotelephone, and more particularly to a wristwatch which can be converted temporarily to a form suitable for use as a hand-held radiotelephone. 
     Olsen U.S. Pat. No. 4,847,818 shows a wristwatch which can be removed from the user&#39;s wrist and temporarily reconfigured for use as a hand-held radiotelephone. The Olsen apparatus has many desirable features, but it would also be desirable to have a structure which forms a somewhat more definite, predetermined shape when reconfigured as a radiotelephone. This would tend to give the article a more substantial &#34;feel&#34; when used as a radiotelephone, thereby making the article more acceptable and attractive to at least some users. 
     In view of the foregoing, it is an object of this invention to provide a wristwatch radiotelephone which can be made to positively assume a definite shape of a first kind when configured for use as a wristwatch, and which can similarly be made to positively assume a definite shape of a second kind when configured for use as a radiotelephone. 
     SUMMARY OF THE INVENTION 
     This and other objects of the invention are accomplished in accordance with the principles of the invention by providing a wristwatch radiotelephone which includes a timekeeping and radiotelephone portion removably mounted on a wristband portion. When the timekeeping and radiotelephone portion is mounted on the wristband portion, the apparatus looks and functions like a conventional wristwatch. When the timekeeping and radiotelephone portion is removed from the wristband portion, however, the timekeeping and radiotelephone portion can be reconfigured to an elongated form which is suitable for use as a hand-held radiotelephone. In particular, the elongated structure includes a radiotelephone microphone adjacent one axial end, and a radiotelephone speaker adjacent the other axial end. The distance between these two components is great enough so that when the elongated structure is held alongside the user&#39;s face, the microphone is adjacent the user&#39;s mouth and the speaker is adjacent the user&#39;s ear, thereby making it possible to use both components simultaneously as in a conventional telephone. 
     Further features of the invention, its nature and various advantages will be more apparent from the accompanying drawings and the following detailed description of the preferred embodiments. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a simplified perspective view of an illustrative embodiment of a wristwatch radiotelephone constructed in accordance with the principles of this invention in the wristwatch configuration. 
     FIG. 2 is a simplified elevational view of the apparatus of FIG. 1. 
     FIG. 3 is a simplified perspective view of the apparatus of FIG. 1 with the timekeeping and radiotelephone portion removed from the wristband portion and opened out for use as a radiotelephone. The portion of the structure including the display, the telephone dialing keypad, and the control buttons is omitted from FIG. 3. 
     FIG. 4 is a simplified elevational view of the apparatus of FIG. 3. 
     FIG. 5 is a simplified elevational view of just the timekeeping and radiotelephone portion of the apparatus of FIG. 1 in a partly unfolded configuration suitable for use as a clock resting on another surface such as a desktop. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Olsen U.S. Pat. No. 4,847,818, which is hereby incorporated by reference herein, shows all of the electronic components and circuitry needed for a wristwatch radiotelephone. All of those same components and circuitry can be used in a wristwatch radiotelephone constructed in accordance with the present invention. Accordingly, it will not be necessary to repeat here any of the details regarding that portion of the apparatus. 
     As shown in FIGS. 1 and 2, an illustrative embodiment of the wristwatch radiotelephone 10 of this invention includes an annular wristband portion 20 and a timekeeping and radiotelephone portion 30 removably mounted on one side of the wristband portion. In the depicted preferred embodiment wristband portion 20 is a somewhat flexible plastic strap 22 with a length adjustment portion 24 so that the strap can be adjusted to fit snugly but comfortably on wrists of various sizes. It will be readily apparent, however, that wristband portion 20 could alternatively be constructed in many other ways. As can be seen in FIGS. 3 and 4, wristband portion 20 includes an arrowhead snap 26 on one side for removably securing timekeeping and radiotelephone portion 30 to the wristband. Arrowhead snap 26 fits into a mating recess (not shown) in the underside of portion 30. This structure holds portion 30 securely to portion 20 but allows the user to pull portion 30 off portion 20 whenever desired. 
     As is best seen in FIG. 3, timekeeping and radiotelephone portion 30 has a main body member 32, a first end member 34 pivotally connected adjacent one of its ends to one end of member 32, and a second end member 36 pivotally connected adjacent one of its ends to the other end of member 32. All of members 32, 34, and 36 are similarly arcuate so that they generally follow the top of the user&#39;s wrist when the apparatus is worn as a wristwatch. End member 36 can be pivoted relative to member 32 so that it overlies the bottom 32a of member 32 between the two radially outwardly extending flanges 32b and 32c of member 32. End member 34 can be similarly pivoted relative member 32 so that it overlies member 36 and the bottom 32a of member 32 also between flanges 32b and 32c. If desired, end member 34 may releasably latch to the other members when folded over the other members as shown in FIGS. 1 and 2. This prevents end members 34 and 36 from folding out except when this is specifically desired by the user. 
     Although shown only in FIG. 1, a display and keypad element 40 is permanently mounted on the center of the bottom 32a of member 32. Element 40 includes a digital display area 42 (e.g., for displaying the time of day), a telephone dialing keypad area 44, and additional buttons 46 for controlling the timekeeping and radiotelephone functions of the apparatus. (Elements 42, 44, and 46 are respectively similar to elements 10, 12, and 11 in the above-mentioned Olsen patent.) Each of members 34 and 36 has a central cut-out through which element 40 extends when members 34 and 36 are folded in against member 32 as shown in FIGS. 1 and 2. In this condition timekeeping and radiotelephone portion 30 forms an extremely compact structure which extends over only one side of wristband portion 20. 
     When it is desired to use the apparatus as a radiotelephone, portion 30 is removed from wristband portion 20 by pulling portion 30 off arrowhead snap 26. (Wristband portion 20 can be left on the user&#39;s wrist.) The user then pivots each of end members 34 and 36 out from member 32 approximately 180° as shown in FIGS. 3 and 4. If desired, the pivotal connections of each of end members 34 and 36 to main member 32 may allow only a predetermined limited amount of pivotal motion of the end members relative to the main member. For example, in the depicted preferred embodiment the pivotal connections between main member 32 and end members 34 and 36 allow the end members to pivot out only approximately 180° relative to main member 32. Also, if desired, the pivotal connections between main member 32 and end members 34 and 36 may include detents for releasably holding the end members in the fully pivoted out position. If provided, such detents help to hold portion 30 of the apparatus in the elongated radiotelephone form shown in FIGS. 3 and 4 when the user places portion 30 in that form. Pivotal connections of the general type described above are shown and described in further detail in commonly assigned, concurrently filed applications Ser. No. 07/961,656 (now Seager U.S. Pat. No. 5,218,577) and Ser. No. 07/963,411,  which are hereby incorporated by reference herein. Alternatively, frictional engagement between main member 32 and end members 34 and 36 may be used to hold these members in whatever relative positions they are manually placed. 
     In the elongated form shown in FIGS. 3 and 4, portion 30 is suitable for use as a hand-held radiotelephone. In particular, when the user holds elongated portion 30 alongside his or her face, a radiotelephone microphone 50 near the free end of end member 34 will be adjacent the user&#39;s mouth, while a radiotelephone speaker 52 near the free end of end member 36 is simultaneously adjacent the user&#39;s ear. Elements 50 and 52 are respectively similar to elements 6 and 8 in the above-mentioned Olsen patent. 
     After portion 30 has been used as a radiotelephone, the apparatus can be returned to the wristwatch form by pivoting end member 36 in over main member 32, and then pivoting end member 34 in over the other two members. Portion 30 can then be re-attached to wristband portion 20 via arrowhead snap 26. 
     If desired, when portion 30 is removed from wristband portion 20, it can alternatively be used as a small clock as shown in FIG. 5. For this use, end member 34 is pivoted out from the two other members by approximately 90°. Portion 30 can then be put down on another surface such as a desktop so that end member 34 rests on the desktop and the other members are vertical, thereby exposing display 42 to view. Again, a releasable detent may be associated with the pivotal connection between members 32 and 34 at the 90° position to help portion 30 maintain the configuration shown in FIG. 5. Friction between members 32 and 34 may alternatively be used to help portion 30 maintain the FIG. 5 configuration. 
     It will be understood that the foregoing is merely illustrative of the principles of the invention, and that various modifications can be made by those skilled in the art without departing from the scope and spirit of the invention. For example, it is not essential that portion 30 be removed from portion 20 during use of portion 30 as a radiotelephone. Portion 30 could alternatively remain on portion 20, with both portions being removed from the wrist. As another example of a modification within the scope of the invention, the auxiliary members like members 34 and 36 could alternatively be connected to main member 32 by means other than the pivotal connections employed in the depicted embodiment. For example, the auxiliary members could pull out of the main member in telescoping fashion. Suitable telescoping structures are shown in commonly assigned, concurrently filed application Ser. No. 07/961,654 (now Thorp U.S. Pat. No. 5,224,076) and Ser. No. 07/963,413, both of which are hereby incorporated by reference herein. Alternatively, instead of pivoting out from a main member about axes which are parallel to the longitudinal axis of the user&#39;s wrist when the apparatus is worn as a wristwatch, the secondary members like members 34 and 36 could pivot out from the main member about axes which are substantially perpendicular to the wrist axis and approximately tangent to the circumference of the wrist (see, for example, the pivotal connections about axes 32 in Seager U.S. Pat. No. 5,218,577, the pivotal connections about axes 34 in commonly assigned, concurrently filed application Ser. Nos. 07/961,655 and 07/961,652, and the pivotal connections about axes 31 in commonly assigned, concurrently filed application Ser. No. 07/962,353, of which applications are hereby incorporated by reference herein). As still another example of a possible modification, elements 42, 44, 46, 50, and 52 can be placed at any desired locations on the apparatus. Wristband portion 20 may also take many forms, including a C-shaped bracelet form. Portion 30 may be removably secured to portion 20 by various means other than by the depicted arrowhead snap 26. For example, a velcro connection may be used.