Patent GB-1327512-A (GB)
Title: Fuel dispenser power resetting and control mechanism
IPC: B67D7/26
Filed: 1971-04-19
Abstract: 1327512 Fluid dispensing systems TOKHEIM CORP 19 April 1971 [18 May 1970] 23761/71 Heading A4T In a fuel dispenser power resetting and control mechanism, the nozzle is removed from its boot and a control lever rotated anti-clockwise to reset the register via input shaft 47, Fig.3 of control housing 37, 39, Figs.3,6, and energize the pump, the register being declutched from the meter and clutched to the reset shaft 49, Figs.5,6 during first phase of the rotation and clutched to the meter and declutched from shaft 49 during a final phase. Shaft 47 carries control lever 53 and roller 59 loaded by over center spring 61, and when housing halves 37, 39 are assembled opposite each other, roller 59 enters cam slot 145 in a disc 137 rotatable at 139 and spring-loaded at 155. A resetting motor 75 turns shaft 49, Figs. 5, 6 via gears 79, 81, 89, 91 and shaft 49 has integral cams 97,109, Figs.6, 7 secured thereto with lost motion by keys 99 engaging shaft flats 105 and cam slots 115, 117, the cams resting on fixed washer 95 having a raised spring arm, 123 engageable with cam depression 121 to prevent clockwise motion. With roller 59 at the top of slot 145, initial movement of the control lever moves roller and disc 137 clockwise to make tooth 151, on pawl 149 pivotally carried at 147 on the disc, abut cam lobe 119 and rotate the cams through their lost motion, whereby a reset motor switch 129 is closed by its lever 135 riding out of cam depression 121. Pawl 149 is held between cam 97, and the pump switch button 71 and a servopilot valve stem 73. Resetting motor rotates the cams substantially a whole revolution to reset the register via shaft 49, and then lobe 119 depresses pawl 149 to operate the pump switch and servo-pilot valve and reset motor switch is opened. On completion of delivery the control lever and roller 59 are returned to initial position to disengage the pawl from the pump switch button and position the cams ready for the next delivery. When a number of dispensers are supplied from a single pump, each hose line contains a servovalve, Fig.12 (not shown), which is only opened by the fuel pressure provided the switch and pilot valve corresponding to the selected dispenser nozzle are opened together. In a self-service dispenser a key-operated inter-connected two switch device in housing 227, Fig.13 is bolted to the side of housing 37. Initially, lever 241 for normally open switch 247 has a catch 248 holding lever 281 for normally closed switch 249, to hold switch 249 open. Key-rotation of lever 241 anti-clockwise against spring 257 momentarily closes switch 247, Fig.16 to start reset motor 75 and release catch 248 to allow switch 249 to close. Reset motor drives cam 97, Fig.5 which closes switch 129 which, through closed switch 249, allows motor 75 to continue running after switch 247 reopens. As in the first embodiment, pawl 149 closes pump switch 69 and opens valve 73 and at same time turns spring loaded lever 273 to depress rod 204 holding lever 281 and switch 249 in its open condition so as to be relatched by lever 241. On turning the control shaft 47 back to initial position, switch 69 opens, valve 73 closes and cam pressure on rod 204 released, but lever 241, 248 catches lever 281 to hold switch 249 open. A ticket printer may be mounted on top of the dispenser casing to key with a shaft from the register, is operated manually and has a Bowden cable connection with lever 242, Fig.13 whereby a ticket printing operation must be completed before further operation of the dispenser after a delivery is possible. (For Figures see next page)