An industrial baghouse having a single clean air plenum in which a portion of the filter bags can be serviced while the baghouse remains on line. Service compartments in the clean air plenum can be individually isolated from the remainder of the clean air plenum by installing removable slide gates through normally sealed slots formed in the top of the baghouse. When a service compartment has been enclosed by the gates, it is isolated from the clean air plenum and access doors above the compartme...

A flip-flop circuit receives a portion of a multiple bit output from a combinational logic circuit to be tested, and feeds back a plurality of bits to comprise a portion of the multiple bit input to the combinational logic circuit. The flip-flop circuit includes a plurality of master and slave flip-flops with the master flip-flops being operable in parallel to receive the output from the combinational logic circuit or in series as a shift register, and the slave flip-flops being operable either ...

The timing (program) cam is driven at timing speed through a gear train which includes a clutch. When a delayed start is desired the timing cam must be positioned at the start of a cycle so a lever sensing the cam position will move a tiltable jackshaft to an active position in which the worm gear on the shaft can be engaged by a manually set ratchet segment while a cam moving with the segment de-clutches the timing speed drive. The worm gear rotation drives the ratchet back to zero at which tim...

An anchor having release capabilities includes a pair of generally planar and spaced-apart flukes joined to a cylindrical tube. A shaft is located intermediate the flukes, the tube passing through the shaft to provide 360.degree. movement between the flukes and shaft. The shaft includes spaced-apart and parallel plates adjacent the tube. A rod is disposed within the tube and a perpendicular trigger is attached thereto, the trigger extending through an opening in the tube. The rod is retained bet...

The power tool has a spindle lock member rotating with the output spindle with a blocking member normally rotating with the lock member but capable of being restrained against rotation. The blocking member extends beyond the lock member and is provided with an opening through which the lock pin can project if the blocking member is at rest or rotating slowly but the opening precludes lock pin entry at normal operation speeds. The lock member has a recess of substantial angular embrace so the end...

A recording apparatus in which the coordinates of a portion of an image to be extracted or erased are determined, a scanning position is detected, and an image signal is switched for blocking or allowing the passage of image signals when said predetermined coordinates coincide with said detected position. An extrction means for extracting a portion of a document image or, an erasure device for erasing a portion of a document image, a designating device for designating a portion to be extracted o...

A tag buffer having built-in testing capabilities is disclosed. In a single-chip, integrated-circuit design which includes a SRAM, a parity generator and checker, and a comparator, a method and capability of testing the functionality of the SRAM and parity components is defined. For an embodiment in which the SRAM component includes a redundancy scheme for replacing a defective memory array row, a test for determining whether a redundant row has been used is also provided.

The preferred embodiment (11) of the modem comprises a control unit (13), a memory (27), a switch (14), and a modem engine (17). The modem engine (17) establishes communications with a modem (30) using conventional handshake methods. The control unit (13) then initiates a special handshake sequence composed of nonprintable, opposing characters to the modem (30) via the switch (14) and the modem engine (17). If the modem (30) completes the special handshake sequence then the control unit (13) and...

A folding table has a flexible table top provided with openings. Attached to the table top and extending below it is a rigid panel with receptacles aligned with the openings. The receptacles are designed to accommodate beverage consumption articles such as bottles, an ice bucket, and the like, for the purpose of use when the table is open, and for the purposes of transportation or storage when the table is closed. The table top is formed as a one piece construction and is attached by fasteners t...

A typewriter having a calculating function, comprising: a keyboard having a plurality of character keys including letter, numeral and arithmetic symbol keys; an arithmetic unit for performing an arithmetic operation designated by at least one of the arithmetic symbol keys, based on plural sets of numeric data each representing a numerical value and entered through the numeral keys; a main control unit for selecting the plural sets of numeric data as operands from among successive sets of data en...