Browse Prior Art Database

Adjustable Sliding Pawl Mechanical Escort Memory

IP.com Disclosure Number: IPCOM000075602D
Original Publication Date: 1971-Oct-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Ballantyne, RA: AUTHOR [+2]

Abstract

Work stations along a conveyer are selected by a manually positionable pawl, which is moved by a worm gear to pick a limit switch associated with the desired work station.

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Adjustable Sliding Pawl Mechanical Escort Memory

Work stations along a conveyer are selected by a manually positionable pawl, which is moved by a worm gear to pick a limit switch associated with the desired work station.

Mechanical escort memories 10 and 11 are attached to transporting devices such as pallets 12 and 13, respectively, with conveyer system 14 moving the transport devices until they align with a particular work station, such as 15 or 15A selected by the escort memory. Memory 10, shown in detail in Figs. 2 and 3, includes a pawl 16 which slides in worm tooth 17. Shoulder 18 of pawl 16 is confined within keyway type slot 19 of housing 20 so that 16 can only move in a direction parallel to the axis of pinion worm gear 17, when 17 is rotated by movement of knob 21. The worm lead determines total axial travel (of 16) with this travel typically being equal to one revolution of 17. A catch 22 is radially spring loaded to engage detents in 17 to provide radial stops which can be read, as shown in Fig. 3, through indicator mark 23 and station identification numerals on the face of 21.

Sensors such as 24 and 25 are associated with 15 and 15A, respectively, and spaced perpendicular to the direction of travel of conveyer 14, as shown in Fig. 2. Although plunger actuated sensors are shown for 24 and 25, various limit switches, valves, proximity detectors, photo cells and the like can be arranged for this purpose.

Multiple escort memories such as 10 can be attach...