Control circuit

• US 3,332,639 A
• Filed: 11/05/1965
• Issued: 07/25/1967
• Est. Priority Date: 11/05/1965
• Status: Expired due to Term

• Current Assignee: Translogic Corporation (Midea Group Co., Ltd)
• Original Assignee: William F. Joy
• Inventors: Joy, William F.
• Application Number:
  US04/513,633
• Time in Patent Office: 627 Days
• US Class Current: 406/5
• CPC Class Codes: B65G 51/36 Other devices for indicating or controlling movements of carriers, e.g. for supervising individual tube sections, for counting carriers, for reporting jams or other operating difficulties
• CPC Class Codes: B65G 51/44 without mechanical contact between carriers and controllers

Claims

1. IN A PNEUMATIC TUBE SYSTEM, THE COMBINATION COMPRISING:

A MAIN PNEUMATIC TUBE;

A SECONDARY PNEUMATIC TUBE BRANCHING FROM SAID MAIN PNEUMATIC TUBE;

A CARRIER ADAPTED TO TRAVEL IN SAID MAIN PNEUMATIC TUBE AND INCLUDING ADDRESS INFORMATION SIGNALLING MEANS THEREON;

A PATH-DEFINING INSTRUMENTALITY FOR DIVERTING SAID CARRIER FROM SAID MAIN PNEUMATIC TUBE TO SAID SECONDARY PNEUMATIC TUBE WHEN SAID PATH-DEFINING INSTRUMENTALITY IN ACTUATED;

SENSING MEANS MOUNTED ON SAID MAIN PNEUMATIC TUBE FOR SENSING SAID ADDRESS INFORMATION SIGNALLING MEANS ON SAID CARRIER WHEN SAID CARRIER IS ADVANCED THROUGH SAID MAIN PNEUMATIC TUBE;

AN INPUT CIRCUIT CONNECTED TO SAID SENSING MEANS FOR PROVIDING AN OUTPUT SIGNAL WHEN PREDETERMINED ADDRESS INFORMATION IS SENSED BY SAID SENSING MEANS;

A PAIR OF TRANSISTORS CONNECTED SO AS TO FORM A MONOSTABLE MULTIVIBRATOR CIRCUIT THAT IS CONNECTED TO THE OUTPUT OF SAID INPUT CIRCUIT;

MEANS CONNECTED TO SAID MULTIVIBRATOR CIRCUIT SO THAT A FIRST OF SAID TRANSISTORS IS NORMALLY MAINTAINED IN A CONDUCTIVE STATE, SAID MULTIVIBRATOR CIRCUIT BEING RESPONSIVE TO SAID OUTPUT