Patent GB-1207574-A (GB)
Title: Improvements in or relating to dispensing apparatus
Inventor: SANDY JULIUS WALLACE
IPC: G07F9/10
Filed: 1968-01-25
Abstract: 1,207,574. Dispensing heated articles. MICROTHERM Ltd. 25 Jan., 1968 [25 Jan., 1967], No. 4070/68. Heading A4T. Food products such as sandwiches in cylindrical containers 24, Fig. 2, stored in a refrigerated compartment 14 of a coinoperated vending machine are dispensed singly from a selected magazine 22, fall on to a common horizontal shelf 38, are pushed along the shelf to a common outlet (53, Fig. 1) by a bar (40, Fig. 1) driven by a sprocket and chain drive 46, 44 from a motor (48) under the control of the product release mechanism, fall from outlet (53) into an inclined shoot 52 down which they slide to a cylindical chamber 55 of a microwave oven 54 and are released after heating to slide down an inclined shoot 56 to an accessible outlet hopper 58. Each magazine 22 stores food products of one type in containers 24 stacked in three rows. The lowermost row of containers 24 of each compartment are held in cups 26a, (26b, 26c, Fig. 1), each in the form of a semi-cylindrical shell and mounted on a rotatable shaft 28, intermeshing gears 30 being provided on each shaft. Each compartment has a motor 32 for driving one of the shafts 28. A motor 32 is selected by switches (34, Fig. 1) after money has been inserted into pocket (36). The open sides of the cups of each compartment are phased so that as the three cups rotate, a container 24 drops out of the cup (26a, Fig. 2) with its open side facing down. An empty cup receives another container 24 from the row above when its open side faces up. When a container 24 slides down shoot 52 it both closes and opens a microswitch 96 to energize a motor 82, Fig. 3, which, through a gear box 84, rotates a shaft 86 and a cam 88 thereon provided with a follower 92 biased thereagainst by a spring 94. The follower is mounted on an arm 90 mounted on a pivoted stub shaft 78 on which is also mounted an arm 76 carrying a door 72 so that on rotation of cam 88, the follower 92 drops and rotates the door 72 to a position in which it closes the upper opening of the oven. Heating commences and when it is terminated a rise on cam 88 rotates lever 90 to open door 72. When this occurs follower 92 opens a microswitch (100, Fig. 5) which switches off motor 82. A safety microswitch 104 is closed only when door 72 is fully closed. During rotation of shaft 86, a follower 112 runs in a rise (126, Fig. 4) in a second cam 106 thereon until the heating is finished to keep a door 74 closing the lower opening of the oven closed. Follower 112 is mounted on a lever 108 pivoted on a pillar 110, and an arm 114 pivoted on the end of lever 108 is secured to door 74. A finger 118 on arm 114 engages an abutment 120 to latch door 74 closed against a spring 122. When heating is terminated, follower 112 reaches a drop (128, Fig. 4) on cam 106 and parts 108, 114 rotate so that the latch 118, 120 is released and the door 74 opens outwardly and upwardly, Fig. 3, of oven wall 65 (see Fig. 4) to allow heated container 24 to fall into shoot 56. A rise (132, Fig. 4) in cam 106 then rotates parts 108, 114 to latch door 74 closed. A safety microswitch 134 is closed only when door 74 is fully closed. As the heated container passes through shoot 56, it operates a microswitch 138 which unlocks a door on hopper 58.