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公开(公告)号：GB2494022A
公开(公告)日：2013-02-27
申请号：GB201212460
申请日：2012-07-13
Applicant: IBM
Inventor： KELLEY JOHN FALK , BROWN DOUGLAS STUART , TORRES ROBERT , SEAGER TODD
Abstract: A system for controlling access to an encrypted document in which a computer receives a request to access the encrypted document, the access request comprising a user ID and a user password. The computer performs a one-way hash function on the user password to generate a hash value. The computer searches an access control table for the hash value which indicates an authorization for the user to access the encrypted document and corresponds to a document password encrypted with the user password. The computer decrypts the document password using the user password. The computer decrypts the encrypted document using the decrypted document password.
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公开(公告)号：DE3668835D1
公开(公告)日：1990-03-15
申请号：DE3668835
申请日：1986-07-28
Applicant: IBM
Abstract: The present invention relates to an assembly of electromagnetic actuators (A, B, C, D, E) for the hammers of an impact printer arranged side by side and extending along a line. Each actuator comprises a first stator part (41) formed with at least one pole piece, a second stator part (42) formed with at least one pole piece and positioned relative to the first stator part so that the pole pieces are spaced apart so as to form a gap therebetween. A single coil (43) is associated with one of the stator parts. Each actuator also includes an armature member (44) formed with a body of non-magnetisable material, at least one armature element of magnetisable material and a hammer head (67). The armature member is supported between the stator parts so that the armature element is located adjacent to the gap. Energisation of the coil causes the generation of a flux which passes across the gap and through the armature element tending to move the armature element into the gap and to cause the hammer head to move into a print position,According to the invention the components of adjacent actuators are complementary in shape so that projecting components (43) of each actuator engage in recessed components (53) of the adjacent actuator whereby the overall length of the assembly along the line is less than the sum of the overall widths of the individual actuators.
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公开(公告)号：HK41490A
公开(公告)日：1990-06-08
申请号：HK41490
申请日：1990-05-31
Applicant: IBM
Abstract: The present invention relates to an assembly of electromagnetic actuators (A, B, C, D, E) for the hammers of an impact printer arranged side by side and extending along a line. Each actuator comprises a first stator part (41) formed with at least one pole piece, a second stator part (42) formed with at least one pole piece and positioned relative to the first stator part so that the pole pieces are spaced apart so as to form a gap therebetween. A single coil (43) is associated with one of the stator parts. Each actuator also includes an armature member (44) formed with a body of non-magnetisable material, at least one armature element of magnetisable material and a hammer head (67). The armature member is supported between the stator parts so that the armature element is located adjacent to the gap. Energisation of the coil causes the generation of a flux which passes across the gap and through the armature element tending to move the armature element into the gap and to cause the hammer head to move into a print position,According to the invention the components of adjacent actuators are complementary in shape so that projecting components (43) of each actuator engage in recessed components (53) of the adjacent actuator whereby the overall length of the assembly along the line is less than the sum of the overall widths of the individual actuators.
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