Control for laundry apparatus

• US 3,223,108 A
• Filed: 08/21/1962
• Issued: 12/14/1965
• Est. Priority Date: 08/21/1962
• Status: Expired due to Term

• Current Assignee: Arthur F. Martz Jr
• Original Assignee: Arthur F. Martz Jr
• Inventors: Martz, Arthur F. Jr.
• Application Number:
  US04/218,247
• Time in Patent Office: 1,211 Days
• US Class Current: 137/93
• CPC Class Codes: D06F 2103/22 Content of detergent or additives
• CPC Class Codes: D06F 2105/02 Water supply
• CPC Class Codes: D06F 2105/42 Detergent or additive supply
• CPC Class Codes: D06F 2105/62 Stopping or disabling machine operation
• CPC Class Codes: D06F 34/22 Condition of the washing liquid, e.g. turbidity
• CPC Class Codes: Y10T 137/2509 By optical or chemical property

Claims

1. IN A FABRIC CLEANING DEVICE, APPARATUS FOR CONTROLLING THE CONCENTRATION OF A CLEANING MATERIAL IN A FABRIC TREATING FLUID THEREIN, COMPRISING:

A FIRST CIRCUIT MEANS INCLUDING FIRST SENSING MEANS FOR MEASURING THE CONDUCTIVITY OF SAID FLUID WITHOUT SAID MATERIAL;

A SECOND CIRCUIT MEANS INCLUDING TRIGGER MEANS FOR CHANGING THE CONCENTRATION OF SAID MATERIAL IN SAID FLUID;

SECOND SENSING MEANS FOR MEASURING THE CONDUCTIVITY OF SAID FLUID WITH SAID MATERIAL THEREIN;

AND THIRD CIRCUIT MEANS RESPONSIVE TO SAID SECOND SENSING MEANS FOR CONTROLLING SAID TRIGGER MEANS TO BRING THE CONCENTRATION SELECTIVELY TO A MAXIMUM PRESELECTED LEVEL AND TO A MINIMUM PRESELECTED LEVEL, SAID THIRD CIRCUIT MEANS BEING FURTHER RESPONSIVE TO SAID FIRST CIRCUIT MEANS TO ADJUST SAID PRESELECTED CONCENTRATION LEVEL AUTOMATICALLY IN ACCORDANCE WITH THE CONDUCTIVITY OF THE FLUID WITHOUT THE MATERIAL.