Patent GB-1241741-A (GB)
Title: Variable speed gear mechanisms and computing devices incorporating such mechanisms
IPC: B67D7/22
Filed: 1969-07-10
Abstract: 1,241,741. Change speed gears. VEEDER INDUSTRIES Inc. 10 July, 1969 [10 July, 1968], No. 34849/69. Heading F2D. [Also in Divisions A4 and G4] In a fuel dispenser having a variator in which any one or a range of gear ratios for blend or price are selected from a set of positive gear drives 74-76, Fig. 1 separately or combined with a positive or negative ratio gear 72-73, Grade A and B fuels flow through motors 12, 14 and proportioning valve 20 to outlets 22, 24 separately or mixed. Meter outputs 26, 28 via differential 30 drive volume register 34 and gear stack 42-45 connected via gears on shaft 60 engageable by range arms 72-76 operated by cams 90-95 to select the blend, the variator 50 output positioning valve 20 via shafts 65, 38. 'For separate grades the valve is positioned by pawls 100, 101 acting on detent 99. Price variator 40 comprising three cam stacks 120- 122 operating range arms connecting gears on shafts 125-127 to gear stack 42-15, each shaft being connected similarly to variator 50, feed the cost register 134 in differentials 130, 132 to give three decimal places according to three cams selected from three price cam stacks. Blend gear-stack 52-55 is driven in unison with stack 42-45 via gears 62-64 and blend output 65 is driven through differential 68 from gears 64, 66 selectively connected to gears 52- 55 by range arms 72-76. Range arms 73-76 provide drive ratios 3-6 but range arm 72 has two idler gears 84, 86 giving ratio-3, so that adjustment of cam-shaft 90 and locking out of gear 64 or 66 at 105, 106 gives ratios of 1-9. shaft 90 has twelve positions for nine blends, two grades and price cams presetting position set by knob 150, 152, Fig. 3 via bevel gearing, gears 156, 158-160 and rack 157, meshed product indicators 164, 165 also being actuated. Cam-shafts 120-12 are. also set by knob 150 according to selection of cams in price cam stacks 164-171, Fig. 5 (Figs. 6, 7, not shown) rotatably adjustable and held by detents (178) on shafts 172-174 and each provided with a radial projection 180 for abutment with stops 182 on carriage 186 axially positioned for engaging a selected three price cams by knob 150 via gearing 190-197 and rack 192, Fig. 5 (Fig. 4, not shown). Cam-shafts 120-122 are positioned in accord with and after the price cam selection by knob 150 via carriage 186, and followed by resetting of registers 34, 134 by electric motor 200 controlled by usual on-off control via worm gears 201, 202 intermeshing gears 206, 209-219, shafts 120-122, Fig. 3, connected by links 230-232 and levers 234 to price cam shafts 172-174 and unit price indicators 241-242, 250-252. Selected price cams are rotated to engage their projections 180 with carriage stops 182 whereupon slipping clutches 222 (Fig. 8, not shown) on shafts 120- 122 allow the motor to rotate further to reset the registers via gears 280, 273-275, Figs. 1, 3. The on-off and selector knob shafts are interlocked at 300-304 (Fig. 4, not shown). In a further embodiment, Fig. 9, adapted to be employed with conventional variators having an input cone gear 400 driving volume counter 34, the price variator has two conventional manually, pivotally and axially set range arms on output shafts 410, 402 for engaging the cone gear, while shaft 403 is driven via range arms 460-464 similar to 50, Fig. 1, selected by cams 421-427 and co-operating with equal sized gears 440-443 driven from the cone gear via gears 450-453 from output shaft 47 l through a selected positive or negative equal range arm gearing 474, 475, whereby the shaft 403 may be rotated in opposite directions to add or subtract the output of variator 410 to the outputs of shafts 401, 402, i.e. the unit volume price can be quickly varied between -9 and +9 cents. Manual rotation of shaft 520 positions a carriage 522 carrying a spring-loaded stop for engaging one of the programmed price cams 510 (similar to cam stacks 169-171, Fig. 5). Cam-shaft 420 is rotated to engage stop 524 from the manual register reset shaft 550 via crank 554 and rack 555, the product being indicated at 490. The selected cam is then withdrawn from stop 524 on rotating shaft 550 to reset the register 34, 134 and moved back to the stop by rack spring 560 against dash-pot 562. Reset 550 and selector 520 are interlocked between mechanisms 571 and 588. The three decimal places of the unit price are indicated at 493 connected to be set from variator 410 via gears 491, 492 and interconnected at 500, 501 with indicator 496 positioned from shaft 401, while shaft 402 position a third decimal place indicator 497.