A foldable ramp for loading and unloading a roll on-roll off type cargo ship and consisting of three pivotally interconnected sections the innermost one of which is pivoted with its inboard end to the ship for being lowerable and extendable onto a wharf by ramp handling cables and winches provided on the ship. The two outboard sections of the ramp are connected by ropes and sheaves to king-posts provided on the ship for automatically extending said sections while lowering the innermost ramp sect...

This invention describes a system for access control wherein a control card is presented to a control means. If the control card is authenticated, then access is gained. If it is not authenticated, access is not gained, the control card is retained, and an alarm may be sounded. The control card contains at least two means; (1) machine readable indicia identifying the card, and (2) a random pattern of micro spots, which pattern is derived (by direct copying -- such as by focussed laser beam) from...

The invention provides an access control system for selectively granting access on presentation and authentication of a control card means, the control card means comprising a web means with machine readable indicia carried thereby and having unique coded micro space pattern means. The control card authentication means descried includes means to read the indicia and a bank of authenticating master patterns, with means responsive to the reading of the indicia to select the appropriate master patt...

A security system for use either as a means for establishing credit or for limiting access to restricted areas. The system operates with a card having a variable 20 by 20 row and column matrix as its internal configuration. The system may be programmed to read any number of digits in the matrix, in any combination and in any sequence. This feature allows the owner of the system to create unique card codes and to change these codes at any time. Programming is accomplished simply by closing a key ...

A radially elongated access slot extends vertically through an otherwise conventional sinker cap to permit easy withdrawal and replacement of damaged sinkers positioned under the slot without disassembly of machine elements. A retainer plate, resiliently urged in a centripetal direction and slidably attached to the underside of the sinker cap, extends into the area beneath the access slot and provides a stop means limiting centrifugal movement of sinkers and thus prevents inadvertent removal or ...

A decimal-coded or equivalent keyboard network is adapted upon each keyboard pushbutton actuation to operate a pulse generator and cause a pulse to be applied to a counter for controlling a sequential comparator. Also connected to the comparator are the movable contacts of four single-pole, multiple-throw switches having fixed contacts connected to the outputs of the keyboard network. Where successive pushbutton operations occur in proper order, controlled apparatus is rendered operable. The fir...

An electrical lock mechanism includes a series of sequentially connected memory storage elements, such as flip-flops, terminating in one or more electrical and/or electromechanical devices that control an external function. Entries into the circuit are made from a plurality of remote switches or switching devices connected to interlocks or logic elements, such as nand gates, that are connected between adjacent memory storage elements. Entry to the circuit through the interlocks in a single prede...

In a circuit for addressing a data store with an address having a portion identifying a character location having several byte locations and a portion identifying one of the bytes within the addressed character location, means is provided for addressing a number of bytes per character that is not an integral power of 2. The two address portions are used conventionally for addressing a first part of the store in which the number of byte positions for each character is an integral power of 2. A se...

A dual access compartmented cabinet located between two adjacent rooms, for example, a kitchen and dining area of a standard living unit. The cabinet has a housing separated into four vertically disposed sections by divider members. A two-way drawer permitting access from the kitchen and dining area is carried in one of the sections of the housing. The drawer carries a compartmented turntable tray in which flatware and the like may be stored. A second section of the cabinet carries a plurality o...

A dynamic random access memory utilitizing MOSFET transistors formed on a single semi-conductor chip is described. The random access memory utilizes 1024 binary storage cells arrayed in rows and columns. Each row of cells has a read line and a write line. Each column of cells has one data line used for both read and write functions. Each cell is comprised of a write transistor and a pair of read transistors. The write transistor couples a capacitive storage node to the data line and is controlle...