公开(公告)号：US3700824A

公开(公告)日：1972-10-24

申请号：US3700824D

申请日：1970-06-26

Applicant: PORTA SYSTEMS CORP

Inventor： LUCA PAUL V DE

IPC: H04Q3/00 ,  H04Q1/18

CPC classification number: H04Q3/00

Abstract: An electrical transition switching apparatus and method for permitting transition switching of subscribers lines from earlier generation switching system units such as, panel, crossbar and step-by-step to similar generation systems or to new generation systems such as, the new electronic switching system units (E.S.S.), comprising cut through relay members, power distribution members and relay actuation means for selectively actuating and deactuating said relay members to thereby permit reversible connection of the subscribers'' lines to either of the similar generation units and the new E.S.S. units or to the earlier generation units to which they were originally connected.

Abstract translation: 一种电转换开关装置和方法，用于允许来自诸如面板，交叉开关和逐步的早期生成开关系统单元的用户线路的转换切换到类似的发电系统或新一代系统，例如新的电子开关系统单元 （ESS），包括切断继电器构件，配电构件和继电器致动装置，用于选择性地致动和停用所述中继构件，从而允许用户线路可逆地连接到任何类似的发电机组和新的ESS 单位或最初连接的早期单位。

公开(公告)号：US3628470A

公开(公告)日：1971-12-21

申请号：US3628470D

申请日：1970-04-09

Applicant: PORTA SYSTEMS CORP

Inventor： LUCA PAUL V DE

IPC: A47B57/00

CPC classification number: A47B3/0912

Abstract: A portable, lightweight and foldable support platform comprising a planar support member and a pair of support leg assemblies secured to the support member at the lateral ends thereof with the support member being fabricated having a core of lightweight, high-strength material, such as a balsa wood composition, and having a plastic layer secured to the underside of said core and a nonskid textured plastic layer secured to the upper surface of the core, the longitudinal sides of the core having aluminum rails secured thereto; the leg assemblies being provided with pivotable hinges to enable the same to be folded flat against the underside of said support member for storage thereof; and the ends of said longitudinal side edges being provided with mating toggle latches to enable adjacent ones of said support platforms to be securedly interconnected to form a support assembly.