Patent GB-380270-A (GB)
Title: Improvements in or relating to magazine gramophones
IPC: G11B17/02
Filed: 1931-10-09
Abstract: 380,270. Magazine gramophones. UNITED RESEARCH CORPORATION, 41, 38th Street, Long Island, New York, U.S.A. Oct. 9, 1931, No. 28125. Convention date, Oct. 22, 1930. [Class 40 (ii).] A magazine gramophone is provided with a record magazine the base wall of which has two diametrically opposed supporting ledges, reciprocating means being employed to release first one supported marginal edge of the lowermost record, and then the other, from the supporting ledge to discharge the record directly on to a turntable. A turntable 20 is driven through a spindle 22, Figs. 5 and 7, by an electric motor 25 mounted on the underside of a frame plate 23. A reproducer carrier arm 26 is mounted on a hub 27 connected to a post 28 which is journalled on a shaft 29 fixed to the frame 23. A frame 39, Figs. 5, 7, and 10, is secured to the frame 23, its top part 46 being inclined over the turntable 20 to form the base of a record magazine 40 seen in plan in Fig. 8, having a side wall 41 to define record-supporting ledges 48, 49. Formed in the wall 41 along the ledges 48, 49 are slots 50, 51 capable of receiving the edge of the lowermost record. A V-shaped slide 55 is mounted on the near side of the base 46 on the legs 56, 57 of which are diametrically opposed fingers 58, 59 which may be reciprocated in slots 50, 51, respectively, to move the lowermost record off the ledges 48, 49, successively. The slide 55 is reciprocated by a lever 63 pivoted to a bracket 64 and having a toe 65 at its upper end extending through a slot in the base 46 into an aperture 67 in the leg 57 of the slide 55. The lever 63 is connected to one arm of a bell-crank lever 69, Fig. 6 (plan), pivotally mounted on a post 70, the other arm of which carries a cam follower 71 engaging in a cam groove 72 formed in a cam plate.73. The cam groove 72 has a dwell portion 72a which locates the fingers 58, 59 in idle position, a portion 72b which serves to move the fingers downwardly until the finger 58 projects slightly beyond the edge of the ledge 48, and a portion 72c which acts to move the fingers upwardly until the finger 57 projects beyond the edge of the ledge 49, and a portion 72d for returning the fingers to their idle position. After discharge of a record it rests temporarily on a rest 53 over the roller 79. The roller 79 is carried on a lever 76 which moves upwardly upon movement of the lever 63 but, upon reversal of the lever 63, moves downwardly so that the record is directed on to the turntable by guides 80, 81, 82. The circuit of the driving motor 25 is controlled by a hand switch operated from a control panel and a second switch 89, Fig. 13, which is closed automatically by the positioning of a record on the turntable 20 when a finger 106 is depressed to oscillate a bell-crank lever 103 which coacts with a lever 97. The lever 97 carries a pin 98 movable against a cam extension 95 of a contact arm 94 so that when the lever 97 is oscillated to either extreme position, the contact spring arms 93, 94 close the switch 89. The switch 89 may also be operable manually by pressing a bar 107, Figs. 5 and 6, connected to a pushbutton 111, whereby the arm 103 is rocked to close the switch. The cam plate 73 is connected through a clutch 113 to the turntable spindle 22. A pinion 114, Figs. 5, 6, and 7, connected with a clutch plate 115, is freely rotatable on the spindle 22 and meshes with a gear 116 rigid with a concentric pinion 117 which meshes with a gear 119 on the hub of the cam plate 73. A clutch element 120 having spaced ratchet teeth 121 is secured to the spindle 22 directly over the clutch plate 115. Pivotally mounted on the plate 115 for movement therewith is an arcuate clutch shoe 122 having a tooth 123 movable by a spring 124 into engagement with one of the teeth 121. Pivotally mounted on the stud 118 is a lever 125 having a lug 126 movable into engagement with the free end of the shoe 122 under the influence of a spring 127. The end of the lever 125 is pivotally connected to an armature 129 reciprocating in a solenoid 130, so that upon excitation of the solenoid the toe 126 will be withdrawn from engagement with the shoe 122 whereupon the tooth 123 will be engaged by the clutch element 120 to establish the drive connection from the spindle 22 to the camplate 73. A locking lever 131, mounted on the stud 118, moves with the lever 125 and is formed with a toe 132 adapted to seat, in idle position, in a notch 133 formed in the periphery of the cam plate 73. When the latter rotates the toe 132 is forced outwardly to lock the lever 125 so that, even though the solenoid 130 is then de-energized, the cam plate will be driven through a complete revolution. The motor circuit is maintained during the complete revolution of the cam plate 73 by a switch 189 closed by a cam 195. Excitation of the solenoid 130 is controlled by a switch 134, Fig. 6, responsive to movement of the carrier arm 26 and comprising a lever 135 fulcrummed adjacent the post 28 on which is mounted a U-shaped clip 136 whose side arms carry opposed switch contacts. A second lever 137 is pivoted on the lever 135 and its free end extends in a slot 139 in the lever 135 to allow limited relative movement between the levers 135, 137. A U-shaped clip 139 secured to the lever 137 carries contacts adapted for engagement with those on the clip 136 and to the post 28 is secured an arm 140 which embraces the lever 137. Mounted on the lever 135 is a leaf spring 141 adapted to engage one side of the lever 137. The switch operates at the end of playing when the lever 135 engages with an adjustable stop 142 which limits further movement of the lever 135, or when the stylus enters a quick pitch groove or an eccentric groove. The lever 135 rests against a sector-shaped part of the plate 23 with insufficient friction to close the contacts 134 against the action of the spring 141 during normal advance of the stylus, but on accelerated movement the friction becomes sufficient to retard the lever 135 and close the contacts 134. In the case of an eccentric groove the levers 135, 137 are moved in the reverse direction to close the contacts 134 on the opposite side. A further switch 147, Fig. 6, operable from the control panel, is provided to energize the solenoid 130 at will to start the machine or eject a record at any time. The pick-up is elevated and lowered by a cam 152, Figs. 5 and 6, formed on the underside of the gear 119. This cam 152 operates a pivoted lever 153 which effects raising and lowering of the carrier arm through levers 156, 158, 159. To swing the arm into and out of playing position there is provided a lever 161 formed with slot 162 engaged by a pin 163 mounted eccentrically on the cam plate 73. The free end of the lever 161 has an end face 165 movable into engagement with a pin 166 on an arm 157 rigid with the post 28. Pivotally mounted on the lever 161 is a lever 167 whose cam-shaped end 168 rides against a fixed pin 169, the other end having a hook 170 to engage the pin 166. Upon outward movement of the arm 26, the hook 170 engages the pin 166 and, upon reversal of the lever 161 during the last half rotation of the cam plate 73, the hook 170 swings the arm 26 inwardly to the starting position. Means is provided to eject a played record comprising a cam member 173, Fig. 6, which depresses one end of a pivoted lever 174, Fig. 5, connected by a lever 179 to a sleeve 180. Journalled in the sleeve 180 is a shaft 183 carrying a friction roller 184 which, when elevated, contacts with and ejects the record into a receptacle. When the last record has been played, an arm secured to a boss 181 for movement therewith actuates the lever 97 to open the switch 89.