Abstract:
An electrically Powered Hand Played Music Box has; 
     a base frame that carries a plurality of 88 damped reed/plectrum tone producing assemblies that can be mechanically accessed in groups of 29 sequenced assemblies each, and placed in correspondence with the keys of a 29 key keyboard so that the player can flexibly select the key that a tune can be played in; 
     an inclined face surface that carries a detachable tune board that carries, according to manufacture, a pre-set or moveable electrical contact for each assembly tone contained in a sequence of tune tones; 
     an electromagnetically propelled switching mechanism that travels a track where it engages remote electrical lines to the tune board contacts and actuates the assemblies that produce the sequenced tones; 
     a tone amplifying microphone, and a speaker; 
     and a key on a single key keyboard that a player taps to actuate the switching mechanism and provide tempo and rhythm to the assembly produced tones.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     This invention relates to mechanical devices that are used to produce music, but more specifically it relates to devices that employ dampened reed/plectrum assemblies, to produce authentic musical notes. 
     2. Prior Art 
     It seems there is a latent desire, in music loving people to “play music” that is considered acceptable, but requires a very minimum expenditure of time and effort. And it seems that this hypothetical need has not been addressed by the Art. 
     SUMMARY OF THE PRESENT INVENTION 
     It is therefore a primary object of the present invention to provide an instrument that can be used to play a musical tune by rhythmically tapping on the instruments single tap key. 
     Another object of the invention is to provide an instrument that produces authentic musical note sounds as opposed to producing imitation musical note sounds. 
     Another object of the invention is to provide an instrument that produces music that sounds like the music that is produced by a music box. 
     Another object of the invention is to provide an instrument that carries 88 individual dampened reed/plectrum shuttle mechanism assemblies that are capable of producing 88 chromatic musical note sounds. 
     Another object of the invention is to provide an instrument that includes a means of accessing any 29 side-by-side musical note producing assemblies group for use in playing a given musical tune. 
     Another object of the invention is to provide an instrument that can employ manufactured tune boards that carry a configuration of pre-set tune circuit contacts that can be switched on and off, in sequence, to provide tone sounds that constitute a musical tune. 
     Another object of the invention is to provide an instrument that can employ tune boards that can carry moveable tone circuit contacts that can be moved into a composed tune configuration and switched on and off in sequence to play the tune. 
     Another object of the invention is to provide an instrument that carries a 29 key board, the keys of which correspond to the 29 assemblies that are accessed, so that assembly tones can be sampled and selected for use in tune composition. 
     Another object of the invention is to provide an instrument with 29 fixed circuit lines in what is identified as a tune network base, the lines of which are an extension of, and correspond to, the 29 assemblies that have been made available, so that fixed or moveable contacts can be connected to them. 
     Another object of the invention is to provide an instrument that employs a battery powered electrical current source. 
     Another object of the invention is to provide an instrument that employs a battery powered, movable, track guided, pendulum paddle propelled, mechanism, to switch the assembly tune circuits of a given tune, on and off. 
     Another object of the invention is to provide an instrument with a switching mechanism that can be flexibly moved onor easily removed from its track. 
     Another object of the invention is to provide an instrument that carries a microphone, a speaker, and a current controller, to suitably amplify the musical sounds produced by the instrument&#39;s assemblies. 
     Another object of the invention is to provide an instrument on which tune composing or tune transposing to accomodate a key requirement can be performed by simple recognition of the sound of the tunes first note, and location and placement of that note&#39;s circuit contact on the composers tune board. 
     Another object of the invention is to provide an instrument that carries an electrical power switch to turn the instrument on or off. 
     Other objects of the invebtion will become apparent as new insights are gained from the application and use of this new instrument. 
    
    
     DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a perspective view of a musical instrument that is played by rhythmically tapping the instrument&#39;s single tap key. 
     FIG. 2 is a side elevation view of the invention that shows tone producing apparatus, tone accessing apparatus, and keyboard apparatus, and the instrument&#39;s single tap key. 
     FIG. 3 is an enlarged sectional view of the instrument&#39;s mechanical tone assembly accessing system apparatus that shows the system body carrying a contact bearing leaf selectively into alignment with an 88 assembly contact plate. 
     FIG. 4 is an enlarged side elevation view of the instrument&#39;s tone group accessing stabelizing apparatus. 
     FIG. 5 is a top view of the instrument&#39;s tone group accessing apparatus that shows 29 tone circuits being accessed from an 88 tone assembly circuit plate. 
     FIG. 6 is an enlarged view of the instrument&#39;s 29 tone contact group sliding leaf embodiment. 
     FIG. 7 shows the copy that is to be printed on the instrument&#39;s top surface along and adjacent the tone group accessing stabelizing holding bar for reference in composing. 
     FIG. 8 is a perspective view of the tune network base—29 tone conductors—built into the face of the instrument. 
     FIG. 9 is a perspective view showing the components of an instrument keyboard key. 
     FIG. 10 is a simulated typical circuit for actuating a tone producing assembly by a keyboard key or by the instrument&#39;s tap key. 
     FIG. 11 is a circuit diagram for the invention. 
     FIG. 12 is a circuit trace of the invention&#39;s provision for reversing the direction of a tone producing assembly&#39;s damped reed/plectrum shuttle mechanism. 
     FIG. 13 is a perspective view of the bottom side of a tune board that is manufactured with a plurality of fixed tune circuit contacts that are pre-set in a “tune configuration” that can be played on the instrument. 
     FIG. 14 is an enlarged side elevation of a fixed tune circuit contact as shown in FIG.  13 . 
     FIG. 15 is a top view of a simulated tune circuit conductor line extension sheet. 
     FIG. 16 is a top view of a compliment to the FIG. 15 extension sheet. 
     FIG. 17 is a side elevation view of a tune board that carries a plurality of moveable tune circuit contacts that can be moved into a “tune configuration” that can be played on the instrument of the invention. 
     FIG. 18 is a top view of a section of a composing tune board that shows how ribs that carry tune conductor lines are spaced apart by spacer pieces, in the construction of the board. 
     FIG. 19 is an elevation view of the moveable tune circuit contact that is referred to in FIG.  17  . 
     FIG. 20 is an end elevation view of the moveable tune circuit contact shown in the FIG. 19 drawing. 
     FIG. 21 is a side elevation view of a tune circuit switching mechanism that is guided in a trackway from open tune circuit, to open tune circuit, to switch them on and off, and generate a tune from a sequence of tones. 
     FIG. 22 is an enlarged front elevation view of the instrument&#39;s circuit switching mechanism pendulum propeller. 
     FIG. 23 is an enlarged side elevation view of the propelling pendulum shown in FIG.  22 . 
     FIG. 24 is a partial elevation view of the opposite side of FIG.  23 . 
     FIG. 25 is a side elevation view showing the components of the instrument tap key. 
     FIG. 26 is a frontal elevation of the tap key shown in FIG.  25 . 
     FIG. 27 is a conceptual perspective drawing showing provision for removing the circuit switching mechanism shown in FIG. 21, from the mechanism trackway. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     A Mechanical electrically powered, hand played music box comprises and is provided with the following: 
     A. Instrument Enclosure Components (see FIG. 1) 
     a. Construct an enclosure for the instrument  1 . 
     b. Provide a rectangular base  2 , and a trapezoidal shaped top  3  made of panels such as  4 ,  5 ,  6 ,  7 ,  8 , and  9 , etc. 
     c. Structurally support the panels with structural angles such as  10 ,  11 , and  12 , etc. to achieve the equivalent of a framed enclosure. 
     B. Assemblies that produce musical tones (see FIG. 2) 
     a. Provide 88 damped reed/plectrum musical tone producing shuttle mechanism assemblies  13 . 
     1) The 88 assemblies produce a chromatic scale of 88 tones. 
     2) The 88 assemblies are fastened side by side on the bottom surface of the trapezoidal enclosure  3 , and stabelized by elongated L bracket  258 . 
     b. Provide a trapezoidal shaped plastic cast frame  14 , to carry the apparatus of each assembly  13 . 
     1) The assembly shuttle mechanism  15 , provides back and forth reed  16  plucking motion by a plectrum  17 . It is fastened to the bottom horizontal member  18  of the frame  14 . 
     2) A shuttle body  19  resembles an inverter T. It can be slid back and forth, carried in a modified U shaped track  20 . 
     3) Each shuttle body  19 , carries a horizontal stabelizing rod  21  that passes through and is fastened in the body  19 . The ends of the rod  21  extend through the mechanism&#39;s left side attractor electromagnet  23  (a horizontal hole  24  is provided through each electromagnet) and into an elongated tube  25  and  26 , that is stationarily fastened to the assembly frame  14 . (cont. ref. to FIG. 2) Each tube  25  and  26 , contains a recoil spring  27 . Each rod  21  end carries a circular piece  28  that encounters and compresses the spring  27 , and eases stopping the shuttle body&#39;s  19  travel. The attractor magnets  22  and  23 , are fastened to the bottom horizontal member of the assembly frame  14 . 
     4) Shuttle body  19  left side travel limit bracket  29 , is fastened to the body&#39;s left side, while travel limit bracket  30 , is fastened to the body&#39;s right side. 
     c. Provide circuit apparatus for reversing the travel of the shuttle body  19 , so that its operation would be charachterized as a “rapid thrusting back and forth motion”. (see FIG. 12) 
     1) The shuttle body  19  carries two probe  31  supported, lift electromagnets  32  and  33 . Each probe  31  is fastened to a support angle bracket  34 , that is fastened to the top of the shuttle body  19 . 
     2) The shuttle body  19  also carries two flexible contact arms  35  and  36 . The contact arms  35  and  36 , are fastened to the body  19  so that each extends outward from the body  19  in parallel alignment with and spaced below its corresponding probe  31  supported electromagnet  32  and  33 . Two circuit continuation contacts,  247  and  248 , are provided.  247  is carried atop electromagnet  22 , and  248  is carried atop electromagnet  23 . These contacts facilitate reversing the directional pull on the shuttle mechanism&#39;s  15  shuttle body  19 . (see FIG. 12) 
     d. Provide each assembly  13  with tone producing apparatus. 
     1) An assembly reed  16 , while made of steel, is capable of producing a specific tone when it is plucked. Each assembly frame  14  carries a reed  16 . The reed  16  is held by an anchor post  37 . The post  37  is fastened to the underside of the frame&#39;s  14  top horizontal member  38 . The post  37  is hollow and could be part of the frame  14  casting. A reed clamp  39 , supports the reed  16  to the post. A reed clamp  39  consists of two concentric spaced apart rings,  40  and  41 , that are joined by an elongated arm  42 . Each ring  40  and  41 , is provided with a set screw  43 . The top ring  40  is fastened to the lower end of the anchor post  37 . The bottom ring  41  is fastened to the upper end of the reed  16 . 
     2) Each assembly frame  14  carries reed damping apparatus. Two damping shoes  44  and  45 , are each supported to an attitude of being in moveable contact with the musical tone producing reed  16 , by a corresponding reed damp shoe lever support arm  46  and  47 . The vertical member  48 , of each arm is flat and magnetically responsive. Shoe  44  is carried by arm  46 . Shoe  45  is carried by arm  47 . Each arm,  46  and  47 , is stabelized/supported on a pin  49 , to an attitude spaced out from the near vertical surface of the damping apparatus bracket  50 . (cont. ref. to FIG. 2) Each arm&#39;s pin  49  fastening includes a return spring  51 , that keeps the arm  46  and  47 , in contact with the reed  16 . Two damping electromagnets  52  and  53  are fastened, spaced out, blocking not shown, from bracket  50 , positioned as shown in FIG.  2 . On actuation of the shuttle mechanism  15 , magnets  52  and  53  become magnetized, and attract arms  46  and  47 , to remove the shoes,  44  and  45  from contact with the reed  16 . 
     Note 1: 
     1) Shoe  44  and  45  removal from contact with a reed  16 , occurs each time the shuttle body  19  is moved horizontally. 
     2) It is intended that the damping shoes  44  and  45 , are to be lifted from their damping attitude almost simultaneously with, but before the plectrum  17  plucks the reed  16 . It is anticipated that varying the factors that influence the comparative rate of speed of the plectrum  17  and arms  46  and  47  will govern timing an assembly  13 . 
     C. A chromatic musical tone group accessing system (see FIGS. 3,  4 ,  5 , and  6 ) 
     a) Provide system apparatus for accessing a given 29 successive chromatic musical assembly tones group to 29 exposed conducting wires  96  in the instrument face, so that these 29 tones can be used individually to play a given musical tune. (Refer to Invention Circuit FIG. 11) 
     1) An accessing system elongated individual assembly circuit contact plate  56 , is supported to an elongated rectangular structural shape  57 , by support bracket  58 . The plate  56  is fastened to the top surface of a trapezoidal shaped base  59  that is carried by the bracket  58 . The plate surface slopes down from the structural shape  57 . A circuit wire  60  from each of the 88 tone producing assemblies  13 , is connected to a corresponding contact  61  on the plate  56 . A travel stop bar  62  that is required for a complementing system element, the leaf,  63 , (see below), is provided at each end of the contact plate  56 . (see FIG. 5) 
     2) An accessing system slideable rectangular shaped body  64  that has extensions  65  along its sides, so that it resembles an inverted T, is carried in a modified U shaped slideway  66 , (see FIG. 3) that extends the full width of the instrument  1 . The body  64  carries a leaf  63  that is hinge  67  fastened to the side of the body. (see FIG. 6) The leaf  63  carries  29  elongated conducting contacts  68  that are fastened in parallel array along the underside of the leaf  63 . The contacts  68  project out from the hinge&#39;s pin  69 . A horizontal wire access hole  70  through the body  64 , is provided for each of the 29 contacts  68 . (Refer again to FIG.  3  and FIG. 6) A Contact plate  71  that has 29 contacts  72  that correspond to the 29 leaf contacts  68 , is fastened horizontally above the access holes  70  alignment, on the body  64  side opposite the leaf  63 . The hinge pin  69  carries a tension spring  73  that provides downward pressure by the leaf  63  on the contact surface of plate  56 . 
     3) A stationary contact plate  74 , is supported to a vertical member  75  of the rectangular base  2  by bracket  76 . The plate  74  is centered between the instrument  1  sides. A circuit wire  77  from each of the 29 leaf contacts  68  is extended through a corresponding access hole  70 , and connected to the corresponding contact  72  on plate  71 . Loosely hung wires  78 , one from each of the 29  72  contacts, is connected to a corresponding contact  79  on plate  74 . (cont. to refer to FIG. 3) 
     4) The accessing system body  64  is provided with a hand operated stabelizing mechanism  80 . (Refer again to FIG. 4) A mechanism  80  L shaped locking lever  81  is hinge  82  fastened to the side of the body  64 . The hinge pin  83  is horizontally disposed in its fastening and carries a tension spring  84  that provides counter clockwise pressure on the lever  81 , so that the lever&#39;s horizontal member, which carries a vertical tab  85 , will cause the tab to be seated in one of 60 vertical slots  86  cut in an elongated holding bar  87  fastened to the top surface of the instrument  1 . The elongated holding bar  87 , carries copy  246 , as shown in FIG.  7 . The letter C is displayed adjacent slot  40 . It is used as a reference mark to assist in conceptual placement, scale wise, of the 29 musical tones that are being accessed. The remainder of the copy identifies slots  1  to  39 , and  41  to  60 . The vertical tab  85  corresponds to musical tone #1 of the 29 accessed tones. A reference line marker  242  is printed above the tab  85 . C corresponds to the assembly  13  that produces a “middle C” tone. See FIG. 4 Locking lever  81  is flexibly connected to displacement lever  92 . A rod  249  is crimped and hinged in a hole  251  at the top of  81 &#39;s vertical member and connected to hinge  252  mounted on the back of  92 . Spring  84  keeps counterclockwise pressure on lever  81 , and keeps tab  85  seated in a slot  86 . Lever  92  is hinge  250  fastened at the top of body  64 . When lever  92  is depressed,  81  is displaced, and tab  85  disengages from the slot  86  it is seated in, and the body can then be slid back and forth in the slideway  66 . (see FIG. 3) The #1 tone is sought and identified. The vertical member  92  is released so the vertical tab  85  seats in the tone slot  86 . And thusly, 29 chromatic tone circuits are accessed to the instrument face  55 . The 29 tone circuits carried in the face become identified by the numbers 1 to 29 printed at the left on the instrument face  55 . Two accessing system tune circuit contact plates,  88  and  89 , are fastened to the instrument face  55 . (see FIG.  8  and FIG. 11) Each plate carries 29 contacts that are in corresponding horizontal alignment, from plate to plate. The plates are parallel amd extend from the bottom to the top of the face  55 . Plates  88  and  89  carry contacts  90  and  91  and are disposed on the left side and right side of the instrument face  55 , respectively. A circuit wire  93  from each of stationary contact plate  74 &#39;s 29 contacts is connected to a corresponding contact  90  on plate  88 . 
     6) An accessing system tune network base  94  is provided. 29 semicircular grooves  95  are cut into the surface of the instrument face  55 . (see FIG. 8) The grooves  95  run horizontally and are parallel to the top and bottom edges of the face  55 . Each groove  95  carries a solid bare conducting wire  96 . In its placement, {fraction (1/2+L )} of the wire&#39;s diameter is set in a groove  95 , and the other {fraction (1/2+L )} of the wire&#39;s diameter extends above the surface of the face  55 . The base  94  compliment, designated a tune board  971 , to be specified, will be placed over the base, to constitute a tune network  98 . Each conductor wire  96  is a connector between a corresponding set of  90  and  91 , contacts. 
     Note 2: 
     1) An accessing system tune network reader, a 29 key  99  keyboard  100  is to be specified. (see FIG. 1) The keyboard  100  is not used to play a tune on the instrument  1 . It is intended as a means of identifying the tone sounds that are accessed. 
     2) The keyboard  100  keys are placed in correspondence with the 29 conductor wires  96  in the tune network base  94  in the face  55  of the instrument by providing a circuit wire  101  to connect each key  99  on the keyboard  100  to a corresponding face  55  contact  91  on plate  89 . (see FIG. 11) 
     3) Also in connection with accessing, tone contacts  128 , that can be moved by hand into a composed tune configuration on a composing type tune board  972  will be specified. 
     4) FIG. 10, a simulated typical circuit employed in actuating tone producing assemblies, either by keyboard key  99 , or by use of an instrument tap key  104 , provides insight into the operation of the accessing system. 
     D. A tune board circuit assembly contacting system (see FIG. 13) 
     a. Provide system apparatus for deploying in a configuration, a plurality of contacts that can be switched on and off, one at a time, by tapping a single key, to effect specific tones in a sequence that constitures a given musical tune. 
     1) Provide a structurally framed tune board  971 , comprised of a plurality of parallel ribs  105  that are equally spaced apart and joined at their ends by spacer plates  106 . Provide a tune board  971  base sheet  107 , that covers and is fastened to the bottom surface of the rib  105  framing. The ribs  105 , plates  106 , and base sheet  107 , could be fastened by gluing. Provide 4 corner slots  108  in the board  971 , oriented in a top of board to bottom of board direction. Provide, as complimentary to the tune board slots  108 , 4 alignment pins  109 , that are set in the face  55  of the instrument  1 . The pins are a locating guide in placing the board  971  on the instrument face  55 . (Refer again to FIG. 1) A typical tune board  971  fastening to the face  55  of the instrument  1  is as follows. The bottom horizontal side  110  of the board  971  is placed under the raised edge of two Z brackets  111  that are fastened, spaced apart, along the bottom of the instrument face  55 . The top horizontal side  112  of the board  971  is engaged and held by a pair of flaps  113 , that are mounted on a rotateable rod  114 . The flaps  113  could be made of clear plastic. The rod  114  is carried by a pair of sleeves  115  that are fastened along the top of the instrument face  55 . The rod  114  end carries a lightly weighted handle  116 , which can be used to rotate the rod so that its flaps  113  move against or away from the exposed surface of the board  971 . The rod assembly  114  serves to hold the tune board  971  in a fixed alignment with the instrument&#39;s tune network base  94 . 
     2) Provide a plurality of resiliant contacts  102  fastened in a specific configuration to the unfastened side of the tune board  971  base sheet  107 . (Refer again to FIG. 13, and see FIG. 14) A manufactured tune board  971  provides one of several possible tune contact configurations. The contact  102  could be made of spring steel. The contact  102  has a conducting surface coating. The contact  102  could be fastened by rivet. An insulated conducting line  118  is connected to each contact  102  and extends from the contact to the bottom horizontal side of the tune board  971 . (Refer again to FIG. 3, and see FIG. 15) The line  118  could be applied to the surface of the base sheet  107  by a screen process where a first printing would apply a conducting material, and a second overprinting would apply a non-conducting material. The ends of the conducting lines  118  , are exposed conducting surfaces. Placement of the tune board  971  on the instrument face  55  provides superimposing each line  118  end on a corresponding tune circuit extension line  119  A plurality of exposed circuit extension lines  119  are carried on a rectangular, plyable, extension line sheet,  120 . The sheet  120  is fastened to the face  55  and top surface of the instrument&#39;s rectangular enclosure  2 . The sheet  120  lines  119  provide circuit continuation from the tune network base  94  to the circuit switching mechanism  121 , that is to be specified. 
     3) Provide a tune board  972 , that is intended for use in composing a tune, and playing it on the instrument  1 . (see FIG. 17) Provide a structurally framed board  972 , comprised of a plurality of parallel ribs  122 , that are equally spaced apart and joined at their ends by rectangular spacing plates  123 . Each composing tune board  972  rib  122 , has a slot  124  that extends the full length of the rib  122 . (Cont ref. to FIG. 17, and see FIGS. 18,  19 , and  20 ) The rib  122  resembles a modified, inverted U. The rib slot  124  carries a conducting rod  125 , fastened to the top interior horizontal surface of the slot. Each conducting rod  125  extends from the top end to the bottom end of the board  972 . Each rod  125  is wrapped around and folded under the lower end and over the upper end of the rib  122  it is carried in. A filler piece  126 , not shown, is proveded in the slot  124 , to support the rod  125  in its fastening. When the board  972  is placed on the instrument face  55 , the folded under rod  125  ends become superimposed on a corresponding extension line sheet  120  tune circuit extension line  119 . The  972  composers tune board carries 4 corner slots  108  that are compatable with the alignment pins  109  provided for the  971  tune board. Fastening the  972  tune board to the instrument face  55 , would be as specified for fastening the  971  tune board. Provide each rib  122  of the composing tune board  972 , with one or more slideable contact bodies  128 . In composing, more than one contact body can be deployed on each rib  122  in making a tune configuration. The contacts  128  are disposed along the top of the tune board  972 , until they are moved to a selected position on the board. (cont. ref. to FIGS. 18,  19 , and  20 ) 
     4) In constructing a slideable contact  128 , provide two side pieces,  129  and  130 , that are joined by a flat center piece  131 , to form the contact body  128 . Fasten these 3 members by thru bolts and nuts  132 . Provide the body  128  with a flexible compressible conductor  133 . The conductor  133  is carried on a body thrubolt  132 , and is disposed with its top curved arm  134 , compressed against the bottom surface of the conducting rod  125 , while its bottom notched arm  135  engages either the face of the instrument  1 , or one of the 29 horizontal tune wires  96 , carried by the instrument face  55 . 
     5) (referring back to FIGS. 13, and  17 ) The resiliant contact lines  118 , and the moveable contact 128 rods  125 , have identical near vertical spacing. Either tune board,  971  or  972 , therefore, is compatable with the spacing of the tune circuit lines  119  carried on extension sheet  120 . A plurality of contact lines  118  or contact rods  125  would be estimated to be 150 plus, to give the instrument sufficent tune capability. 
     6) Note in FIG.  2  and in FIG. 3 that provision is made for extending the lower horizontal edge of the extension sheet  120  vertically down and fastened to the upper vertical face of one of the instrument&#39;s track and bridged circuit facings,  136  and  137 . The  120  sheet could be fastened by gluing. The lower vertical edge of the sheet  120 , carries each tune circuit line  119 . Each tune circuit line  119 , extends to and is connected electrically to stationary contact  138  on track  150  face  136 . 
     7) Note in FIG. 16 that provision is made for continuation of the  119  circuit lines carried on sheet  120 , on a complementary sheet,  151 . Sheet  151  is fastened on track  150  vertical side face  137 . Hex shaped contact  139 , which corresponds to contact  138 , is stationarily fastened to the  137  vertical face opposite the  136  face. The  151  sheet carries  119  lines that correspond to the  120  sheet lines on the opposite side of the trackway  150 . The  151  sheet  119  lines extend electrically from each  139  hex contact vertically up the facing  137 , and then a nominal horizontal distance, to a common wire  152 . Hex contacts  138  and  139  are exposed contact surfaces. Circuit switching mechanism  121 , bridges circuit faces  136  and  137 , as it travels track  150 , the width of the instrument  1 . (cont. ref. to FIG. 16) The complimentary sheet  151  lines  119 , which are conductors covered with a non-conducting coating, could be applied to the  151  sheet by screen process, applying first a conducting material and overprinting with a non-conducting material. The common wire  152 , could merge at the sheet  151  edges, into an insulated copper connecting wire  153 . The sheet  151  could be fastened by gluing. (refer again to FIG. 11) 
     E. Tone verifying apparatus for an instrument  1  composing system 
     a) As a compliment to the specified 29 tone assembly  13  accessing apparatus, provide a keyboard means of actuating the sound producing assemblies. Provide the keyboard  100  with 29 white identical keys  99 . Number the keys from left to right, 1 to 29. The key numbers correspond to the numbers 1 to 29 printed along the left edge of the instrument face  55  that identify the exposed conductors  96  of the network base  94 . A key on the keyboard  100  is depressed, and the sound is listened to, when using the system. If the sound is acceptable, the line to the assembly that produces it is tapped by connecting a contact  128  to it, that connects it to a conductor rod  125 . (refer again to FIGS. 1,  3 , and  9 ) 
     1) In making the keyboard  100 , fasten each key  99 , to the top of a vertically supported hingeboard  140 . The hingeboard  140  is supported to a vertical interior length member  75 , of the rectangular base  2 . Typically, provide each key  99  Of the keyboard  100 , with a return spring  142 , a hinge  143 , and an elongated vertical-rise-limit angle  144 . Provide the keyboard  100  with a down travel limit contact bar  145  that is supported to a base strip  146  that is fastened to the top surface of the base  2  bottom panel  147 , and that extends under all of the keyboard  100  keys  99 . Each keyboard key  99  is provided a set of contacts,  148  and  149 . 
     F. Apparatus for switching a plurality of tone providing assembly  13  circuits, on and off, one at a time, in given sequence. (cont. ref. to FIG. 3, and see FIG. 21) 
     a) Provide a circuit switching mechanism  121  that is propelled over an instrument trackway  150 . 
     Note 3: 
     See FIG.  11  and note that a battery  236  to assembly  13  circuit is open where the circuit encounters the switching mechanism  121 . The switching mechanism, which is on its own circuit, and which carries a conductor line segment  189  across its top surface, provides conductor bridging of each of the open assembly circuits as it travels the trackway  150 . 
     1) The trackway  150  could be a casting  156  made of plastic. Provide an elongated, unitized series of wedge recesses  157  that carries a channel trackway,  154  and  155 , along each of its top edges. (see FIG. 3) The trackway unit  150  is carried by the box shaped structural member  57 . 
     2) The switching mechanism  121  has a sled shaped base  159  that carries horizontally projecting runners,  160  and  161 , along each side. The runners,  160  and  161 , support the sled base  159  to the trackway channels  154  and  155  (cont ref. to FIG. 21, and see FIGS. 22,  23 , and  24 ) 
     3) The mechanism  121  propulsion assembly  162  is supported to a base block  163  that is mounted on the front top surface of the sled base  159 . A horizontally forward projecting arm  164 , hinge  243  supports a pendulum shaped paddle  165 . The paddle  165  is supported to the underside of the arm  164 . The pin  244  of the paddle hinge  243  extends out of the sides of the paddle assembly. The pin  244  supports a spring  170  which maintains counter clockwise rotational tension on the paddle  165 . One end of the spring  170  is set in a horizontal hole in the side of the paddle, and its opposite end is stabelized by a rotational stop pin  171 . 
     4) At the lower end of the paddle  165 , fasten a short extension piece  168 , by hinge  169 . The pin  245  of hinge  169  extends out of the sides of the extension assembly. The pin  245  supports a spring  234  that provides counterclockwise rotational tension on the extension piece  168 . A lip bracket  235  limits the counterclockwise rotation of the extension piece  168 , to a maximum of 180° from the paddle  165 . Provide a retaining pin  216  at each end of pin  244 . Provide a retaining pin  221  at each end of pin  245 . 
     5) At the upper end of the paddle  165 , provide a magnetically attractive plate  172 , fastened parallel to and along the rear facing side of the paddle  165 . Provide a bracket  173  supported electromagnet  174 , adjacent the paddle hinge  243 . The magnet&#39;s  174  support angle  173  is fastened to the underside of support arm  164 . The magnet  174  driven paddle typically provides a step type propulsion of the switching mechanism  121 . (refer again to FIG. 21) 
     6) Additionally, provide the switching mechanism  121  with a vertical reciprocating sled base stabelizing assenbly  175 . A secondary rectangular base block  176 , is mounted on the top surface of the sled base  159 . A horizontally aft facing lower support arm  177  is supported by an angle bracket  178 , to the rear vertical surface of the secondary base block  176 . And a horizontally aft facing upper support arm  179 , is supported by its fastening to the aft top surface of the secondary base block  176 . The bar  179  is aligned directionally above the lower support arm  177 . (cont. ref. to FIG. 21) 
     7) A vertical elongated reciprocating wedge rod  180  is fastened in and extending out of the top surface of a wedge  181 . The wedge  181  has been modified by the removal of its bottom apex  182 . The rod  180  extends vertically through the lower arm  177  and the upper arm  179 . A rod retaining pin  183  is set horizontally through the top end of the rod  180 . A rectangular shaped electromagnet  185  is attached to the bottom surface of arm  179 . The electromagnet  185  has a vertical elongated hole through its center  257 . A recoil spring  186 , encompasses the rod  180 , and extends from the top of the wedge  181 , to the spacer plate  187  that is fastened to the bottom surface of lower arm  177 . A lower arm  177  length extending member  188 , which is made of non magnetically attractive material, is fastened to the top surface of the lower arm  177 , and extends in an aft direction. Rod  180  is stationarily fastened in a rectangular attractor block  184 . Block  184  carries bracket  254 , which is provided with a guide hole  253 . Line  204  extends from its slideable lever  196  fastening, over pulley  202 , down through hole  253  and is is fastened to horizontal stop pin  255 . Coil return spring  256  is fastened to the  204  line end. The unfastened end of the spring  256  is fastened to the top surface of arm extension  188 . The specified arrangement allows movement of the switching mechanism  121 , while line  204  remains stationary. 
     8) A wedge tune circuit extension conductor line  189 , is provided. The line  189  extends the circuit from wedge end surface  190 , over the top of the wedge  181 , to  191 , on the opposite side of the wedge. End surface  190  carries conducting contact  192 . End surface  191  carries conducting contact  193 . The line  189  connects contacts  192  and  193 . The line  189  is insulated, except for its points of contact. 
     9) When electromagnet  174  is actuated and the pendulum  165  is pulled in a clockwise direction, the pendulum engages the wall of a track wedge recess  157 , and causes the sled base  159  to travel forward a distance equivalent to the eidth of the top of the track wedge recess  157 . And since the pendulum electromagnet  174  and the reciprocating rod electromagnet  184  are actuated near simultaneously, while the sled base  159  is moved, the contact,  192  and  193 , bearing wedge, travels up and bridges circuit from hex shaped surface contact  138  to hex shaped surface contact  139 . This actuation sequence typically effects the production of a tone by an assembly  13 . The wedge then drops into the next subsequent track wedge recess  157 . 
     G. Apparatus for moving or disengaging the instrument  1  switching mechanism  121 . 
     a. Provide a system of pulleys, lines, and hand operated levers,  194 , for lifting the reciprocating wedge  181 , and diverting the pendulum  165 , so that the switching mechanism  121 , can be slid to the left on the trackway  150 , and removed from its track  150  engagement. 
     1) The system  194  includes a fixed lever  195  and a slideable lever  196  assembly  197 , that are carried by the upper arm  179 . The slideable lever  196  is connected to a plate  198 , not shown, that supports two channels so that they form a shoe  199 . The shoe  199  is slideable along upper arm  179 . 
     2) A pulley  200  is fastened by bracket  201 , not shown, to the slideable lever assembly  197 . (cont. ref. to FIG. 21) A pulley  202  is fastened by bracket  203  to the trailing end of the upper arm  179 . A pulley  206 , that is vertically aligned below the slideable lever pulley  200 , is mounted on an angle bracket  207 , that is mounted on the top surface of the lower arm  177 . A line  208  that is connected to the slideable lever  196 , extends over pulley  200 , drops vertically to pass under pulley  206 , and extends horizontally forward to a fastening point  209  on a slideable pendulum diverter bracket  210  base  211 . A base  211  track  217 , which resembles a short length of I beam, is mounted on top of arm  164 , and runs parallel to the arm. Base  211  holding spring  239 , holds the base against a stop pin  240 . The spring  239  and pin  240  are structurally supported to end post  241 . 
     3) The diverter bracket&#39;s  210  near vertical members  212  and  213 , engage the pendulum extension tab  214 , when the bracket base  211  is moved forward or backward on track  217 . Refer to FIG.  24  and note that the pendulum extension tab  214  does not engage the diverter bracket&#39;s near vertical members  212  and  213 , while the switching mechanism  121  is used in playing a tune. (cont. ref to FIG. 21) 
     4) When fixed lever  195 , and slideable lever  196  are grasped and the slideable lever is squeezed toward the fixed lever  195 , line  204  lifts the reciprocating wedge  180  out of the wedge recess  157  it is sitting in, and line  208  slides diverter bracket  211  rearward, causing the bracket to engage the pendulum tab  214 , and rotate the pendulum  165  counterclockwise, and cause it to move into a near horizontal attitude, and disengage from contact with the wedge recess  157 , it was sitting in. And when the hand operated lever system  194  has effected the actuation of these two assemblies,  162  and  175 , the switching mechanism  121  can be slid out of the trackway  150  via the instrument&#39;s  1  left side. (see FIG. 27) And, by the same token, the switching mechanism  121  can be disengaged, and moved to a previously played tone assembly  13 , line  119 , to simplify the composing process. 
     H. Apparatus for actuating the tune circuits of the instrument  1  by rythmically tapping a key  104  (refer back to FIG.  1  and FIG. 2) 
     a. Provide an instrument tap key  104  that on bottoming, when it is depressed, produces actuation of an instrument tone producing assembly  13 . The key would follow the up and down motion of an instrument  1  players tapping finger. Refer to FIG.  25  and FIG. 26 
     1) Provide an elongated, wide key member  104 , hinge  223  fastened to the instrument hinge board  140 . Provide a U shaped key bottoming stop  224 . The recessed surface of the U shaped stop  224 , has a piece of felt  225  glued to it to soften tap key  104  bottoming. Provide a coiled compression key return spring  226 . The spring  226  is fasyened in a near vertical upward extending attitude, set on and fastened to a beveled base plate  227 . The base plate  227  is fastened to the upper surface of the instrument&#39;s  1  bottom panel, one of the (4-8) specified above. 
     I. Electrical apparatus for a mechanical electrically powered, hand played music box. 
     a. Provide electrical means specified and identified in the invention&#39;s electrical circuit diagram. (refer again to FIG. 11) 
     1) Provide sound amplification system elements including: a microphone  228 , a speaker  229 , and a rheostat  230  volume control. The microphone  228  and speaker  229 , could be located approximately as shown in FIG.  2 . Sound amplification would be controlled by the rheostat  230 . 
     2) Provide a sound system on/off switch  231 , located as shown in FIG.  1 . Provide a potentiometer  237  as shown in FIG.  11 . Provide an instrument on/off switch  238 , as shown in FIG. 11, and located as shown in FIG.  1 . 
     3) Provide battery  236 , noted above, as a power source for the invention. 
     4) Provide a keyboard on/off switch  232 . 
     Note 4: 
     Wire  260  connects key  99  contact  148  to sw.  232 . 
     Wire  261  connects sw.  232  to  236  (−). 
     wire  262  connects  236  (−) to electromagnet  174 . 
     Wire  263  connects electromagnet  174  to electromagnet  185 . 
     Wire  264  connects electromagnet  185  to (+) side of  104 . 
     Wire  265  connects (−) side of  104  to potentiometer  237 . 
     Wire  266  connects  237  to  238 . 
     Wire  267  connects  238  to  236  (+). 
     Wire  259  connects each assembly  13  to  237 .