公开(公告)号：US4017696A

公开(公告)日：1977-04-12

申请号：US645655

申请日：1975-12-31

Applicant: Robert James Falk

Inventor： Robert James Falk

IPC: H04M3/12 ,  H04M3/22 ,  H05K1/11

CPC classification number: H05K1/117 ,  H01R12/722 ,  H01R23/70 ,  H04M3/12 ,  H05K2201/0746 ,  H05K2201/094

Abstract: Initializing apparatus for use with circuitry mounted on a plug-in printed circuit board is described. Illustratively a telephone make-busy circuit is disclosed, which circuit automatically operates a make-busy relay on a plug-in telephone circuit when that circuit is plugged into a connector. A special "half" contact on the printed circuit board is connected to the control lead for the relay and when the circuit board is inserted into the connector, ground is momentarily applied to the contact and the relay control lead by a contact finger in the connector. The momentary ground causes the make-busy relay to operate for making the circuit appear busy to the telephone switching system. When the circuit board is fully inserted into the connector, the connector contact finger moves off the special contact on the circuit board and thereby removes the temporary ground. However, the relay remains operated by means of a circuit involving its own contacts for maintaining the circuit busy under control of a maintenance and test desk.

Abstract translation: 描述了用于安装在插入式印刷电路板上的电路的初始化装置。 例如，公开了一种电话忙 - 忙电路，当该电路插入连接器时，该电路自动操作插入式电话电路上的繁忙继电器。 印刷电路板上的一个特殊的“半”接点连接到继电器的控制引线上，当电路板插入连接器时，接地线通过连接器中的接触手指瞬间施加到触点和继电器控制引线 。 瞬时地线使繁忙的继电器工作，使电路出现忙于电话交换系统。 当电路板完全插入连接器中时，连接器触点指向电路板上的特殊触点移开，从而移除临时接地。 然而，继电器通过涉及其自身触点的电路继续运行，以便在维护和测试台的控制下维持电路的繁忙。