METHOD AND ARRANGEMENT FOR TESTING THE LIQUID IN WASHING MACHINES

• US 3,645,669 A
• Filed: 02/28/1969
• Issued: 02/29/1972
• Est. Priority Date: 02/28/1969
• Status: Expired due to Term

• Current Assignee: Gerhard Rausch
• Original Assignee: Gerhard Rausch
• Inventors: Rausch, Gerhard
• Primary Examiner(s): Weinblatt, Mayer
• Application Number:
  US04/813,381
• Time in Patent Office: 1,096 Days
• Field of Search: 8/137,142 324/30 68/12
• US Class Current: 8/137
• CPC Class Codes: D06F 2103/20 Washing liquid condition, e.g. turbidity
• CPC Class Codes: D06F 2105/42 Detergent or additive supply
• CPC Class Codes: D06F 2105/58 Indications or alarms to the control system or to the user
• CPC Class Codes: D06F 2105/60 Audible signals
• CPC Class Codes: D06F 2105/62 Stopping or disabling machine operation
• CPC Class Codes: D06F 23/02 and rotating or oscillating about a horizontal axis
• CPC Class Codes: D06F 33/37 of metering of detergents or additives
• CPC Class Codes: D06F 34/22 Condition of the washing liquid, e.g. turbidity

Abstract

In a washing machine, a galvanic element in the form of a pair of electrodes of different metals is mounted within the container for the washing liquid which acts as an electrolyte. The electrodes continuously sense the degree of dissociation of the washing liquid during the washing process with additional detergent or washing agent being added in response to the degree of dissociation. The washing liquid will contain the dirt released from the laundry being washed, the fresh water initially added at the beginning of the washing process and the washing agent or detergent.

Claims

2. In a process as claimed in claim 1 and the further steps of measuring the degree of dissociation of added water, comparing the degrees of dissociation of the added water and the washing liquid to determine the difference between said degrees.

3. In a process as claimed in claim 1 and the further or steps of generating a signal in response to a predetermined unsatisfactory degree of dissociation, and introducing additional detergent in response to the generated signal

4. In a process as claimed in claim 1 and the additional steps of measuring the degree of dissociation per unit time of the detergent in the washing liquid, and introducing additional detergent into the washing liquid in response to the degree of dissociation per unit time.