Device for integrating and indicating a parameter over time

US8018347B2 · kind B2 · utility

Assignee

• Acreo AB · SE

Inventors

• Payman Tehrani · Söderhamn, SE
• Mats Robertsson · Stockholm, SE
• David Nilsson · Vikingstad, SE
• Oscar Larsson · Söderhamn, SE
• Nathaniel Robinson · Tranemo, SE
• Rune Groppfeldt · Oslo, NO

Key dates

• Filing date: May 5, 2009
• Grant date: Sep 13, 2011
• Expiry date: Mar 12, 2030

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01H43/32
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A device for integrating and indicating a parameter over, comprising: a first electrode (2), a second electrode (3), an electrolyte (5), which is in contact with the first electrode and in consuming contact with a consumption portion (6) of the second electrode, at least two indicators (I1, I2, I3), which are connected to the consumption portion (6) at a respective connecting point (P1, P2, P3). The electrolyte (5) and the consumption portion (6) are selected such that when a voltage is applied over the electrodes (2, 3), the consumption portion (6) is consumed at a predetermined rate, wherein the indicators (I1, I2, I3) are arranged to switch states in response to a consumption frontier (F1, F2) of the consumption portion reaching or passing a connecting point (P1, P2, P3) associated with the respective indicator (I1, I2, I3), wherein at least one of the indicators is a binary (on/off) indicator.