An MOS dynamic random-access memory (RAM) realizable as a 64K RAM is disclosed. Single transistor cells employing capacitive storage are coupled to folded bit-line halves. These bit-line halves are connected to sense amplifiers employing cross-coupled transistors. Boosting means employing a variable capacitance are coupled to the bit-line halves to boost the potential on a line during reading. The capacitor associated with each of the memory cells is coupled to a potential which is greater than ...

The instant disclosure is directed to an access ladder for the elevated operator's platform of a vehicle, the ladder being pivotable in two planes between operative and inoperative positions about two separate axes. Counterbalance means interconnecting the ladder and the platform assist pivotal movement in the first plane. A biased locking mechanism releasably holds the ladder in the operable position relative to the second plane.

A means and method for accessing a digital memory system in a manner permitting the transfer of a two-byte information signal into and out of a storage area defined by any two logically adjacent memory bytes. Provision is also made for maintaining a preselected locational integrity between the bytes forming the information signal.

A multiple access store having bipolar monolithic memory cells. Each cell includes a memory flip-flop comprised of cross-connected NPN transistors. A single concurrent read and write for each cell is achieved by a pair of accessing transistors, one accessing transistor of the pair connected at its base to the base of one of the flip-flop transistors and the other accessing transistor of the pair connected at its base to the base of the other of the flip-flop transistors. Each accessing transisto...

A computer system having two processors and storage where storage is segmented so as to permit simultaneous access by the two processors with the address path of one processor being limited to a particular segment of storage so as to eliminate contention in other segments. One processor can address all segments of storage and place processed data into and retrieve data from the segment of storage accessible by the other processor. This eliminates the need for cycle stealing because the other pro...

Access identification apparatus which includes key operated switch actuating plates with exterior tangs that rock in one rotary direction to rock switch actuating elements in the opposite angular direction.

A memory in which each cell comprises an MOS transistor merged with a storage capacitor and in which the cells are arranged to permit adjacent pairs of transistors in a common column to share a common source and the transistors in a common row to share a common gate electrode conductor. The memory uses a first polycrystalline silicon layer which is patterned to provide interconnected storage electrodes and a second polycrystalline silicon layer which is patterned to provide a plurality of stripe...

A combination duct access section which, installed in a duct, provides the duct with an access opening, a transparent inspection door, and/or a vacuum relief valve.

Apparatus for manufacturing door frames for insertion into a door opening, for example in air handling ducts and the like and comprising a door frame forming member having at least one bendable corner, and corner fastening means at a fourth corner whereby the frame member can be formed into a rectangular frame. The apparatus may include door latching means fastened to the frame member, and means for sealing the frame to a duct opening. In conjunction with the door frame apparatus the invention f...

A closure structure for disposition over a window in the wall of an air duct is provided to allow access into the duct. A rectangular frame member is positioned to surround the window in the air duct and is secured along the perimeter of the window by a plurality of flanges which project from the frame transversely of the wall. Each of the flanges has a line of weakness proximal the wall and is manually bendable along this line to a position contiguous the wall to secure the frame member. The tw...