Adaptor for automated laundry system

• US 4,103,520 A
• Filed: 03/11/1977
• Issued: 08/01/1978
• Est. Priority Date: 03/11/1977
• Status: Expired due to Term

• Current Assignee: Aldi Incorporated (ALDI Einkauf GmbH & Company OHG)
• Original Assignee: Aldi Incorporated (ALDI Einkauf GmbH & Company OHG)
• Inventors: Jarvis, John R., Brown, Eldon W.
• Primary Examiner(s): Coe, Philip R.
• Application Number:
  US05/776,645
• Time in Patent Office: 508 Days
• Field of Search: 68/12 R, 68/17 R, 68/207, 134/57 D, 134/58 D, 134/95
• US Class Current: 68/12.18
• CPC Class Codes: D06F 2103/38 Time, e.g. duration
• CPC Class Codes: D06F 2105/42 Detergent or additive supply
• CPC Class Codes: D06F 34/06 Timing arrangements
• CPC Class Codes: D06F 39/022 in a liquid state D06F39/024 takes precedence

Abstract

An automated laundry system is disclosed which includes a washer operative to advance through a plurality of operating cycle stages, an injector having a plurality of liquid additive reservoirs and associated timed control valves operative to selectively inject liquid additives into the washer, and an adaptor connected to the washer and injector for controlling injection of the additives into the washer in predetermined sequence throughout each operating cycle of the washer. The adaptor establishes sequential program signals to the injector for a washer which does not have a built-in programmed signal producing means for the injector.

Claims

1. In a laundry system which includes a washer having means operative to effect a cycle of operation during which the washer undergoes a plurality of operating stages, said washer further having means for establishing a recurring impulse signal at predetermined time periods during said cycle of operation, said system including injector means adapted to inject a quantity of at least one laundry additive into said washer in response to a command signal, said injector means including timer means operative to receive said command signal and establish the time duration of each additive injection, the combination therewith comprising adaptor means separate from but operatively associated with said washer and said injector means for controlling the injection of said laundry additives into said washer in direct relation to establishment of said recurring impulse signals, said adaptor means including primary electrical power supply means separate from said washer, first means connected in circuit to said primary supply means and operable to establish a plurality of command signals in selected sequence, each of said command signals having operative association with said timer means in a manner to control injection of a selected laundry additive into said washer, said adaptor means including second means adapted to receive each impulse signal from said washer and being operative in response to receipt of each impulse signal to actuate said first means to establish a command signal so as to effect injection of a selected laundry additive into said washer.

2. The combination as defined in claim 1 wherein said injector means includes a plurality of reservoirs each of which is adapted to store a laundry additive preliminary to injection of the additives into said washer, said first means comprising a multiposition switch including a plurality of terminal contacts selected ones of which are each connected in circuit to said timer means to control a selected one of said laundry additive reservoirs, said multiposition switch further including a movable contact, and actuator means operative to move said movable contact intermittently through a cycle wherein said movable contact successively contacts said terminal contacts, said second means comprising second switch means operatively associated with said actuator means so as to effect movement of said movable contact to each successive terminal contact upon receipt of each successive impulse signal from said washer.

3. The combination as defined in claim 2 wherein said acutator means comprises a stepping motor having electrical connection with said second switch means and operative in response to an impulse signal applied to said second switch means by said washer to step said movable contact between successive ones of said terminal contacts.

4. The combination as defined in claim 3 wherein said stepping motor includes an armature shaft which is rotationally advanced through a predetermined arcuate angle upon receipt of each impulse signal by said second switch means, said adaptor including means to electrically hold said stepping motor in each rotationally advanced position throughout the duration of the impulse signal which effected the said rotation advance, whereby each command signal established by said first switch means has a time duration substantially equal to the time duration of the corresponding impulse signal applied to said second switch means.

5. The combination as defined in claim 2 wherein said second switch means includes a relay switch responsive to receipt of an impulse signal from said washer to actuate said multiposition switch to establish a different command signal upon receipt of each impulse signal from said washer during a cycle of operation thereof.

6. The combination of claim 2 including third switch means connected in circuit with said primary power supply means and said first and second switch means, said third switch means being operative to advance said multiposition switch to a home position when a voltage signal is applied to said third switch means from said primary power supply and when no impulse signal is applied to said second switch means from said washer.

7. The combination as defined in claim 6 wherein said third switch means includes a relay switch having a relay coil connected in circuit with said second switch means, said third switch means being operative to advance said multiposition switch to said home position when said first switch means initiates a selected one of said command signals and upon termination of the impulse signal to said second switch means which caused establishment of said selected one of said command signals.

8. The combination as defined in claim 2 including a homing switch operatively connected between said primary power supply means and said multiposition switch and operative to sequence said multiposition switch to a selected home position without need of said second switch means receiving an impulse signal from said washer.

9. A laundry system as defined in claim 2 wherein a predetermined position of said movable contact of said multiposition switch constitutes a home position, and wherein said adaptor means includes circuit means adapted to automatically advance said movable contact to said home position after each cycle of operation of said washer.

10. A laundry system as defined in claim 9 wherein said adaptor means includes means to establish said home position of said multiposition switch independently of impulse signals from said washer.

11. An adaptor as defined in claim 2 including a homing switch operatively connected between said primary power supply means and said first switch means and operative to sequence said first switch means to a selected home position without need of said second switch means receiving an impulse signal from the washer.

12. The combination as defined in claim 1 wherein said injector means includes a plurality of reservoirs each of which is adapted to hold a selective liquid additive, an injector operative with each of said reservoirs and adapted to selectively inject the associated additive into said washer, and a control valve associated with each of said injectors operative to control said injectors, said timer means being operatively associated with each of said control valves and responsive to receipt of a command signal from said adaptor to control the duration of injection from each of said reservoirs, said adaptor having electrical connection to said timing means and being operative to transmit said command signals to said timing means in predetermined sequence upon receipt by said adaptor of impulse signals from said washer.

13. A laundry system as defined in claim 1 wherein said primary power supply means provides a 24 v.a.c. output.

14. An adaptor for use in a laundry system which includes a washer having means operative to effect a cycle of operation during which the washer undergoes a plurality of operating stages, said washer further having means for establishing a recurring impulse signal at predetermined time periods during each cycle of operation, and injector means adapted to inject a quantity of at least one laundry additive into said washer in response to a command signal;

said adaptor comprising primary electric power supply means separate from said washer, first switch means connected in circuit to said primary power supply means and operable to establish a plurality of command signals in selected sequence, each of said command signals being adapted for operative association with the injector means in a manner to control injection of a selected laundry additive into said washer, said adaptor means including second switch means adapted to receive said recurring impulse signals from the washer and being operative in response to receipt of said impulse signals to actuate said first switch means to establish successive command signals in response to receipt of successive impulse signals from said washer during a cycle of operation of said washer, whereby said adaptor is adapted to control the injection of laundry additives into the washer from the injector means in direct relation to establishment of impulse signals by the washer.

15. An adaptor as defined in claim 14 wherein the injector means of the laundry system includes a plurality of reservoirs each of which is adapted to store a laundry additive preliminary to injection of the additives into the washer, and wherein said first switch means comprises a multiposition switch including a plurality of terminal contacts selected ones of which are adapted for connection in circuit to control selected ones of a plurality of laundry additive reservoirs, said multiposition switch further including a movable contact, and actuator means operative to move said movable contact intermittently through a cycle wherein said movable contact successively contacts said terminal contacts, said second switch means being operatively associated with said actuator means so as to effect movement of said movable contact to each successive terminal contact in response to receipt by said second switch means of successive impulse signals from the washer.

16. An adaptor as defined in claim 15 wherein said actuator means comprises a stepping motor having electrical connection with said second switch means and operative in response to an impulse signal applied to said second switch means from the washer to step said movable contact between successive ones of said terminal contacts.

17. An adaptor as defined in claim 16 wherein said stepping motor includes an armature shaft which is rotationally advanced through a predetermined arcuate angle upon receipt of each impulse signal by said second switch means, said adaptor including means to electrically hold said stepping motor in each rotationally advanced position throughout the duration of the impulse signal which effected the said rotation advance, whereby each command signal established by said first switch means has a time duration substantially equal to the time duration of the corresponding impulse signal applied to said second switch means.

18. An adaptor as defined in claim 15 wherein said second switch means includes a relay switch responsive to receipt by said first switch means of an impulse signal from the washer to establish a different commmand signal upon receipt of each impulse signal during a cycle of operation of the washer.

19. The adaptor of claim 15 including third switch means connected in circuit with said primary power supply means and said first and second switch means, said third switch means being operative to advance said first switch means to a home position when a voltage signal is applied to said third switch means from said primary power supply and when no impulse signal is applied to said second switch means from the washer.

20. An adaptor as defined in claim 19 wherein said third switch means includes a relay switch having a relay coil connected in circuit with said second switch means, said third switch means being operative to advance said first switch means to said home position when said first switch means initiates a selected one of said command signals and upon termination of the impulse signal from the washer to said second switch means which caused establishment of said selected one of said command signals.

21. An adaptor as defined in claim 15 wherein a predetermined position of said movable contact of said multiposition switch constitutes a home position, and wherein said adaptor includes circuit means adapted to automatically advance said movable contact to said home position after each cycle of operation of said washer.

22. An adaptor as defined in claim 21 wherein said adaptor includes means to establish said home position of said multiposition switch independently of receipt by said second switch means of impulse signals from a washer.

23. An adaptor as defined in claim 14 wherein said primary power supply means is adapted to provide a 24 v.a.c. output.