Browse Prior Art Database

Positive Seating Reel Latch

IP.com Disclosure Number: IPCOM000075425D
Original Publication Date: 1971-Sep-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Bajgert, TA: AUTHOR [+2]

Abstract

This reel latch operates in two sequential steps. During the first step, reel 10 is axially positioned against positioning shoulder 11 of reel drive hub 12, to accurately align the reel of magnetic tape relative to the tape path of an associated magnetic tape unit. During the second step, resilient rubber ring 13 is radially expanded under the reel mounting opening, to couple the reel to the drive hub. Fig. 1 shows the latch in the latched condition.

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Positive Seating Reel Latch

This reel latch operates in two sequential steps. During the first step, reel 10 is axially positioned against positioning shoulder 11 of reel drive hub 12, to accurately align the reel of magnetic tape relative to the tape path of an associated magnetic tape unit. During the second step, resilient rubber ring 13 is radially expanded under the reel mounting opening, to couple the reel to the drive hub. Fig. 1 shows the latch in the latched condition.

The drive hub 12 includes stationary walls 14 and 15 and an intermediate axially movable wall 16. The space between walls 14 and 16 is exposed to ambient air pressure. Spring 17 biases the movable wall toward wall 15. Closed space 18 between walls 15 and 16 includes a rubber diaphragm 19 and is connected to the positive pressure source of the magnetic tape unit by way of hollow shaft 20. Wall 16 carries a number of inclined surfaces 21. These surfaces expand a split ring 22 which carries the rubber ring 13.

The reel is first manually positioned on the drive hub by pressing the reel axially over a number of circumferentially spaced spring loaded detents 23. Each of these detents is constructed as shown in Figs. 2 and 3.

The solid line position of Fig. 2 shows the detent prior to pressurizing of chamber 18. The broken line position shows the detent with the chamber pressurized, that is, with the latch in a latched condition. Wall 16 carries a number of springs 24, each of which is spaced fro...