Browse Prior Art Database

Power Door and Latch

IP.com Disclosure Number: IPCOM000089339D
Original Publication Date: 1977-Oct-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

French, WD: AUTHOR [+3]

Abstract

Described is a power-operated window or door for an automated teller machine which combines means for lifting the door and damping its free-fall to a closed position, together with means for latching the door in the closed position against being forced open improperly.

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Power Door and Latch

Described is a power-operated window or door for an automated teller machine which combines means for lifting the door and damping its free-fall to a closed position, together with means for latching the door in the closed position against being forced open improperly.

Door or window 1 is placed in the front of the teller machine such that it covers the keyboard and display area. It is connected by link 2 to piston rod 3 of piston 4 which is operated by compressor 5, supplying pressure through line 6 to the cylinder to an open or raised position. Once piston rod 3 has reached its uppermost limit, pressure builds in cylinder 4 until pressure relief valve 10 opens, permitting compressor 5 to operate through bypass loop 8. At termination of the transaction, piston rod 3 is released and permitted to drop together with window 1 by gravity, with air passing through orifice 9 and pipe 7 to equalize the pressure at the top and bottom portions of cylinder 4 such as to dampen the fall of window 1.

Damper/cylinder 4 may be a commercial pneumatic or hydraulic unit using seals with low breakaway force, such as lip-type seals. As shown, the pneumatic system is connected in a closed loop, rather than an open loop, mode, which, of course, would be an alternative approach.

Link 2 interconnecting door 1 and piston 3 is attached at pivot 14 to latch 11, which has a beveled surface 11a. Catch 12, mounted to the base cover of the machine at pivot point 16, is spring loaded in a counter-clockwise direction by spring 13. Link 2...