Abstract:
This invention relates to an apparatus for holding a tool and mechanically operating the tool. The apparatus comprises a clamp which holds the tool and which is adjustably mounted on a plate. The plate is adjustably mounted to the surface of a support frame. A thrust means is also mounted to the frame for applying thrust to a portion of the tool, the thrust means being controllable by a control means which may be in the form of a foot switch. Movement of the thrust means operates the tool.
Abstract:
A microwave coaxial switch which provides relatively high isolation for the unused channel over a relatively large frequency band. The switch terminals and interconnecting switch blades are positioned in a rectangular chamber proportioned to form a waveguide below cut-off for the principal waveguide mode in the operating frequency range of the switch. A recess is provided in the wall of the chamber above the terminals with a terminal-interconnecting blade being positioned in the recess in physical and electrical contact with the recess upper wall when the blade is in its inactive position.
Abstract:
Apparatus and methods for deriving in essentially real time unweighted and weighted continuous electrical representations of the Fourier transform and/or the inverse Fourier transform of a complex waveform. In performing the Fourier transform, the input waveform is sampled at the Nyquist sampling rate and the samples stored in respective sample-and-hold circuits. These samples are applied to signal generating circuitry for deriving harmonically related time-varying cosine and sine signals having peak values corresponding to weighted or unweighted values of respective ones of the sample-and-hold circuit outputs, and having a fundamental frequency which may be chosen independently of the frequency content of the input waveform. These cosine and sine signals are then respectively summed for producing resultant summed sine and cosine signals which respectively correspond to weighted or unweighted representations of the real and imaginary components of the Fourier transform of the input waveform with the frequency variable being simulated by time. In one embodiment, these summed sine and cosine signals are applied to a function generator for generating signals representative of the weighted or unweighted amplitude spectrum and/or phase spectrum of the input waveform for further application to appropriately calibrated and adjusted oscilloscopes for producing visual displays thereof. In another embodiment, these resultant summed sine and cosine signals are in turn sampled at the Nyquist sampling rate to provide samples which may conveniently be modified in accordance with desired criteria. The modified samples are then recombined using the inverse Fourier transform technique of the invention which employs circuitry basically similar to that used for the Fourier transform to produce an output signal representative of the original input signal and containing the modifications produced in accordance with the desired criteria.
Abstract:
Apparatus is disclosed for controlling the basis weight of double-layer paper from a Fourdrinier machine by: comprising composite dry basis weight from total basis weight and moisture measurements; computing the dry basis weight of the top layer from the composite dry basis weight and the stock flow and consistency data of both layers; correcting the stock flow rate for the top layer to achieve a desired top layer dry basis weight value; and correcting the stock flow for the bottom layer to achieve a desired composite dry basis weight taking into consideration the correction made in the stock flow of the top layer. Composite dry basis weight changes due to changes in machine speed and stock consistency are anticipated and corrected by making a compensating change in stock flow for both layers. The flow rate of fiber onto the wire screen of the machine is controlled by computing headbox total flow setpoints from fiber flow data and desired headbox consistency, and adjusting the headbox slice position accordingly. Speed of the slice jet relative to the wire screen is controlled by controlling headbox head.
Abstract:
A controllable light reflective device made up of a chamber having at least a portion of its walls transparent to form a window therein with a light reflective structure forming part of or associated with said window. A fluid is placed in the chamber with structure for controllably displacing the fluid to and from a selected portion of the chamber and in optical cooperation with the reflective structure so as to control the amount of incident light which is reflected by the device through the window.
Abstract:
A combined component and interconnection module having a plurality of components, such as integrated circuit modules, directly mounted to and electrically connected with an interconnection pattern so as to avoid the need for the conventional printed circuit board or other external means normally required to provide interconnections between these components. The interconnection pattern is formed using computercontrolled winding apparatus to form wire loops in predetermined slots of a core in a predetermined sequence, the wire loops on one side of the core being cut to permit the remaining loops to provide the desired interconnection pattern. The components of the combined module are mechanically and electrically connected to the core and interconnection pattern by component terminals which pass into respect core slots for soldering to loop wire portions therein. Selected component terminals also may be advantageously adapted to serve as output terminals for the resulting combined module. Power busses may additionally be incorporated within the combined module. A number of advantageous assemblies for these combined modules are also disclosed.
Abstract:
A connector of a type which receives a mating knife contact between the prongs of a forked contact member of the connector in such a manner that a twisting of the prongs of the connector exerts resilient electrical contact pressure upon the knife contact. The present invention achieves a more reliable electrical contact by the twisting action of the prongs of the receptacle upon insertion of the knife contact. The connector of the present invention comprises a body of insulating material having bearing surfaces which support a knife contact at an angle with respect to a pair of contact forks, such that upon insertion of the knife contact between the fork prongs a twisting of the prongs, rather than a spreading thereof, produces the contact engagement with the knife. The connector is designed such that it contains a forked receptacle at one end, a knife contact at the other, and a soldering lug protruding laterally thereof, all three portions of the contact member being of single-piece stamped construction. In a preferred embodiment of the invention, the knife portion of the connector is designed to matingly engage the receptacle portion of a like connector.
Abstract:
Housing for a plurality of elongated cable junction connectors of different heights provides a box with a snap-on cover which, when closed, retains connectors in assembled relation. Ribs in the cover adjacent to the ends of connectors engage high profile connectors directly. Slots are provided in the ribs, and removable spacer blocks are provided to be manually push fitted into appropriate slots. When so inserted they will engage and retain low profile connectors. The cover has a positive hook engagement with the box at the cable-entry end, and a snap detent latch at the opposite end.
Abstract:
In a machine for making pancakes in an automatic operation which includes a cabinet with a compartment at the top in which is a container for batter, and a compartment therebelow in which griddles are disposed, and insulation between the compartments; means for heating the griddles individually and sensing the heat thereof, including in each an imbedded heating element and an imbedded sensing element; means for mounting the griddles and made of material for insulating the heat directly from the griddles so as not to transmit the heat to the batter; the mounting means including a hollow tube for enclosing a plurality of electric wires leading to the heating and sensing elements in the griddles; the mounting means also including self-contained means demountably supporting the griddles, with detachable electrical contacts between the wires in the mounting means and the elements in the griddles, and arranged so that upon mechanical mounting of the griddles on the mounting means the electrical contacts are automatically interconnected; the griddles are sealed so that, when demounted, they may be immersed in a cleaning liquid; and means for moving the griddles individually from a vertically aligned stacked position, into a position for filling from the supply of the batter, and then into dispersed positions for distributing heat in the baking cycle, and then again into a stacked position for discharging the pancakes onto a receiver or plate.
Abstract:
Pushbutton switch in which a coiled return spring holds a magnet in a socket of a pushbutton and against a roll pin which is accessible after assembly for slidable adjustment to fix the position of the pushbutton at which the magnet actuates a reed switch positioned alongside the path of movement of the magnet. The adjustment is performed by hand or automatically by mechanism controlled from the reed switch. Integral fingers on the pushbutton spring inwardly during assembly and then outwardly to act as a return stop. A one piece stamping supports the reed switch and is cut during construction to provide both terminals of the switch.