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Browse Prior Art Database

Cartridge Autoloader

IP.com Disclosure Number: IPCOM000097021D
Original Publication Date: 1962-Apr-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 3 page(s) / 77K

Publishing Venue

IBM

Related People

Barbeau, RA: AUTHOR [+5]

Abstract

The autoloader is operated by placing magnetic tape cartridge 10a in pocket 9. During the sequence of events which follow, the cartridge is brought forward automatically to position 10b until its side grooves 12 engage elevator hooks 11. The cartridge is then lowered by elevator screws 12 to position 10c in a tape transport (not shown). In the transport, a pair of arms 16 reach forward and bring the cartridge into a loaded position for use. After use, the cartridge is pushed back to position 10c. While a cartridge is in the transport, another can be placed in position 10a. The used cartridge is brought up to position 10b. Then, both used and unused cartridges in positions 10b and 10a are brought forward simultaneously to positions 10d and 10b, respectively.

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Cartridge Autoloader

The autoloader is operated by placing magnetic tape cartridge 10a in pocket
9. During the sequence of events which follow, the cartridge is brought forward automatically to position 10b until its side grooves 12 engage elevator hooks 11. The cartridge is then lowered by elevator screws 12 to position 10c in a tape transport (not shown). In the transport, a pair of arms 16 reach forward and bring the cartridge into a loaded position for use. After use, the cartridge is pushed back to position 10c. While a cartridge is in the transport, another can be placed in position 10a. The used cartridge is brought up to position 10b. Then, both used and unused cartridges in positions 10b and 10a are brought forward simultaneously to positions 10d and 10b, respectively. The unused cartridge in position 10b is automatically lowered into the machine for use. The used cartridge at 10d is removed and a new cartridge is placed in position 10a to continue the sequence.

Carriage 20 is slidably mounted on a pair of bars 21a and 21b. Each is rotatably supported by members 22 fastened to a frame (not shown). Carriage 20 is biased toward a backward position by a spring 23. Carriage 20 is moved forwardly and backwardly by lever arm 24 pivoting about shaft 25. Arm 24 has a forked end engaging a pin 29 projecting from the top of carriage 20. Arm 24 is driven by cam follower 26, cam 27 and motor 30 through a drive belt.

Extending below the carriage, but not fixed to it, are a pair of cantilevered hooks 41 and 42. These are fixed to supporting members 51 and 52 that are fixed rotationally to rods 21a and 21b. Rods 21 are rotated in opposite directions through a crank and linkage mechanism connected to the output shaft of motor
50. Such mechanism comprises crank 47, link 48 and crank 46 which drives shaft 21a. Shaft 21a rotates in one direction, while shaft 21b rotates in the opposite direction due to reversal crank linkage 43, 44 and 45. Motor 50 moves hooks 41 and 42 upwardly and downwardly. Commutator 70, having opposite brush contacts M and N and a common contact C, senses when hooks 41 and 42 are in their upwardly or downwardly position. The sensed outputs of M and N are connected to logic 51.

Similarly, emitter ring 31, fixed to the supporting shaft 28 of cam 27, senses particular positions for carriage 20 needed to synchronize its movement with motor 50. The emitter provides indications of those positions via brushes J, K, and L and common brush C, which are connected to logic 51. Motor 8 controls the upward and downward movement of elevator hooks 11. Motor 8 is con...