公开(公告)号：EP0250218B1

公开(公告)日：1993-09-01

申请号：EP87305359.9

申请日：1987-06-17

Applicant: THE GENERAL ELECTRIC COMPANY, p.l.c.

Inventor： Clark, Michael George ,  Bowry, Carolyn ,  Mosley, Alan ,  Nicholas, Beatrice Mary

IPC: G02F1/137

CPC classification number: G02F1/141

公开(公告)号：EP0250217A2

公开(公告)日：1987-12-23

申请号：EP87305358.1

申请日：1987-06-17

Applicant: THE GENERAL ELECTRIC COMPANY, p.l.c.

Inventor： Nicholas, Beatrice Mary ,  Clark, Michael George ,  Mosley, Alan ,  Hilsum, Cyril

IPC: G01K11/06 ,  G01K3/04

CPC classification number: G01K11/06 ,  Y10S252/962 ,  Y10T428/25 ,  Y10T428/2984

Abstract: A device for indicating whether a rise in temperature above a predetermined value has occurred includes a support member (3), such as a label, on which a temperature-sensitive material (1) is deposited. The material includes a large number of fracturable microcapsules containing a medium which changes from a solid state to a liquid state at the predetermined temperature value. The viscosity of the medium in its liquid state and the material of the support member are chosen such that the distance d₁ by which the medium flows across the support member after the fracturing of the microcapsules so as to activate the device is indicative of the time between activation of the device and cooling of the device to below the predetermined temperature value. If the temperature is subsequently allowed to rise above the predetermined value, the medium will again assume its liquid state and will flow further across the support member, reaching a distance of, say, d₂, thus indicating that the rise in temperature has occurred. The material may be printed on the label as a bar code, so that any rise above the predetermined temperature level will be indicated by distortion of the bar code which renders it unreadable.

Abstract translation: 用于指示温度是否高于预定值的装置发生了包括淀积有感温材料（1）的诸如标签的支撑构件（3）。 该材料包括大量可破裂的微胶囊，其含有在预定温度值下从固态变为液态的介质。 选择其液态介质的粘度和支撑构件的材料，使得在微囊压裂之后介质流过支撑构件的距离d1，以便激活该装置，这表示在 激活装置并将装置冷却到预定温度值以下。 如果温度随后允许升高到高于预定值，介质将再次呈现其液体状态并且将进一步流过支撑构件，达到例如d2的距离，从而指示温度升高已经发生。 材料可以作为条形码打印在标签上，使得超过预定温度水平的任何上升将由条形码的失真来表示，这使得其不可读。

公开(公告)号：EP0250217B1

公开(公告)日：1993-02-10

申请号：EP87305358.1

申请日：1987-06-17

Applicant: THE GENERAL ELECTRIC COMPANY, p.l.c.

Inventor： Nicholas, Beatrice Mary ,  Clark, Michael George ,  Mosley, Alan ,  Hilsum, Cyril

IPC: G01K11/06 ,  G01K3/04

CPC classification number: G01K11/06 ,  Y10S252/962 ,  Y10T428/25 ,  Y10T428/2984

公开(公告)号：EP0250217A3

公开(公告)日：1989-04-05

申请号：EP87305358.1

申请日：1987-06-17

Applicant: THE GENERAL ELECTRIC COMPANY, p.l.c.

Inventor： Nicholas, Beatrice Mary ,  Clark, Michael George ,  Mosley, Alan ,  Hilsum, Cyril

IPC: G01K11/06 ,  G01K3/04

CPC classification number: G01K11/06 ,  Y10S252/962 ,  Y10T428/25 ,  Y10T428/2984

Abstract: A device for indicating whether a rise in temperature above a predetermined value has occurred includes a support member (3), such as a label, on which a temperature-sensitive material (1) is deposited. The material includes a large number of fracturable microcapsules containing a medium which changes from a solid state to a liquid state at the predetermined temperature value. The viscosity of the medium in its liquid state and the material of the support member are chosen such that the distance d₁ by which the medium flows across the support member after the fracturing of the microcapsules so as to activate the device is indicative of the time between activation of the device and cooling of the device to below the predetermined temperature value. If the temperature is subsequently allowed to rise above the predetermined value, the medium will again assume its liquid state and will flow further across the support member, reaching a distance of, say, d₂, thus indicating that the rise in temperature has occurred. The material may be printed on the label as a bar code, so that any rise above the predetermined temperature level will be indicated by distortion of the bar code which renders it unreadable.

公开(公告)号：EP0250218A1

公开(公告)日：1987-12-23

申请号：EP87305359.9

申请日：1987-06-17

Applicant: THE GENERAL ELECTRIC COMPANY, p.l.c.

Inventor： Clark, Michael George ,  Bowry, Carolyn ,  Mosley, Alan ,  Nicholas, Beatrice Mary

IPC: G02F1/137

CPC classification number: G02F1/141

Abstract: A liquid crystal device comprises a ferroelectric smectic phase liquid crystal (21) enclosed between two surfaces (23,25), the surfaces being such that the directors (37,39)of the liquid crystal adjacent the surfaces are not parallel to the surfaces. The directors adjacent one of the surfaces are not parallel to the directors adjacent the other surface, the liquid crystal cone angle ϑ o being equal to half the angle between a pair of directors each adjacent a different one of the surfaces.

Abstract translation: 液晶装置包括封闭在两个表面（23,25）之间的铁电近晶相液晶（21），所述表面使得与表面相邻的液晶的指向矢（37,39）不平行于表面。 相邻一个表面的指示器与邻近另一个表面的指示器不平行，液晶锥角θo等于一对相对于不同表面之间的导向器之间的角度的一半。