Abstract: There is disclosed a thermal-type air flow measuring instrument which judges whether the direction of flow of a fluid, ranging from a static flow to a pulsating flow involving a reverse flow, is forward or reverse, and outputs a signal corresponding to the flow rate of the fluid, thereby measuring the flow rate with high precision. An auxiliary passage is provided in a fluid passage, and is constituted by first, second and third passageways. Two temperature sensing resistors are mounted respectively at an upstream side and a downstream side within the first passageway in close proximity to each other. Most of the fluid, flowed into the first passageway in a forward direction, flows through the second passageway. The third passageway serves to direct a reverse flow of the fluid toward the temperature sensing resistors.

Abstract: A process for the preparation of polyaniline by an oxidation polymerization of aniline with use of an oxidizing agent and a protonic acid, wherein the pKa value of a byproduct produced by the reduction of the oxidizing agent is greater than the pKa value of the protonic acid. The protonic acid is an aromatic sulfonic acid compound having at least a sulfonic-acid group. A process is also provided for the formation of a solid electrolytic capacitor including an electrolyte of the polyaniline. A method is provided of improving the electrical conductivity of the polyaniline prepared by the above process. The polyaniline is subjected to a heat treatment in a vacuum or an inert gas in which a partial pressure of oxygen is 10 mmHg or below.

Abstract: In a solid electrolyte capacitor in which the solid electrolyte is polyaniline or a polymer of an aniline derivative doped with a prototnic acid, a disulfonic acid represented by the general formula (1) is used as the protonic acid to enhance high-temperature endurance and humidity resistance of the solid electrolyte: ##STR1## where R is m-phenylene, p-phenylene or a C.sub.7 to C.sub.10 bridged cycloalkylene group, and n and m are independently integers from 1 to 3. Disulfonic acids of the general formula (1) are novel compounds.

Abstract: A light-resistant polyaniline light-shielding film, comprising a thin polyaniline film in which Lewis acid is contained in an amount of 0.1 to 5 mol % per monomer unit of the polyaniline. The thin film is used as a black matrix for a liquid crystal display device. The device thus obtained has high reliability.

Abstract: An annular front end base portion, a main portion and an annular rear end base portion form all together a substantial portion of a collet provided with a tapered outside surface adaptable closely in a tapered hole of a collet chuck and a tool holding hole is formed in the axial portion of the collet. In the main portion are formed a first set of axially long radial slits opening at the end surface of the front end base portion and terminating to be closing in the rear end base portion and a second set of axially long radial silts opening at the end surface of the rear end base portion and terminating to be closing in the front base portion. Each of the radial slits of the first set and each of the radial slits of the second set are arranged at proper angular intervals and alternately along the peripheral direction of the collet, and respective zigzag paths are formed which are closed over the whole peripheries of the outside and inside surfaces of the collet, respectively.

Abstract: A tool mounting apparatus comprises a main shaft including an insertion hole and a stop flange, and an insertion part including a main body, an annular engage member disposed around the main body, wedge members and an annular clamp member disposed outside the annular engage member and biased in the axial direction. When the main body with a tool mounted is put in and abuts the insertion hole and lock nails formed on the annular engage member engage the stop flange, the wedge members are held firmly by the annular clamp member in the bottom portion of the space between a first receive wall provided on the main body and a second receive wall provided on the annular engage member. The tensile force exerted from a work piece through the first wall, the wedge members, the second wall and the lock nails is borne by the stop flange and does not move the tool.

Abstract: A sewing machine has a bed housing having a needle penetrating hole at one end thereof, an arm housing rising from the other end of the bed housing and extending to the one end of the bed housing over the bed housing, a laterally-long needle bar arm rotatably held in the arm housing and having a needle at the front end thereof, and a drive unit for swinging the needle bar arm with respect to the bed housing accommodated in the bed housing. The arrangement of the laterally-long needle bar arm and the drive unit accommodated in the bed housing, can effectively reduce the overall height of the sewing machine. It further reduces the weight and cost of the sewing machine, since no conventional material, such as cast iron having a heavy weight is used and die cast aluminum associating with a higher cost, may be employed for producing the arm housing.

Abstract: A copy machine designed specifically for mounting adjacent the console of a motor vehicle between the front seats thereof includes an elongated rectangular chassis having a cover member pivoted at one end thereof and an output table pivoted at the opposite end thereof with the upper surfaces of the cover member and output table defining an armrest surface. An image reader is mounted in the cover member and cooperating feed rolls are provided on a chassis and cover member for feeding an original document past the image reader and outwardly through an aperture in the upper surface of the output table. An input table is pivotally mounted coaxially with the cover member to provide a guide surface for feeding the original document between the cover member and the chassis. A printing mechanism including a paper supply is mounted in the chassis adjacent the paper feeder and an internal cover member directs the printed copy to a storage compartment which is accessible upon lifting the output table.

Abstract: A constant-voltage circuit includes a transistor (Q3) for output control connected between a source potential and a ground potential and a divider circuit (R1, R2, D2, D3) which are connected in series. The dividing point of the divider circuit connected between the emitter of the transistor (Q3) and the ground potential serves as an output terminal to be supplied with a predetermined voltage by the emitter of the transistor (Q3), so that a constant voltage appears at the output terminal. Connection between the base and the collector of the transistor (Q3) is so improved that the emitter voltage is not changed following a change in the source voltage. More specifically, the transistor (Q3) is connected in such a manner that the collector-to-emitter voltage is continuously clamped by the base-to-emitter voltage of the transistor (Q3), so that the transistor (Q3) is not subjected to a base width modulation effect and thus the emitter potential is not changed following the change in the source voltage.

Abstract: A stitch pattern selector is provided having pattern selector buttons that can be depressed with low force application.

Abstract: A sewing machine frame is comprised of a vertical support member, a horizontal arm, and a horizontal cantilevered base member, each of which is comprised of a hollow, rectilinear aluminum extrusion. The vertical support member is secured to a horizontally disposed base and the arm and bed may be secured to a side of the vertical support member or the vertical support member may be divided into first and second portions with the first portion interposed between the arm and the bed and the second portion being interposed between the bed and the base. In the latter construction, common bolts secure the arm, the bed, the base, and the first and second portions of the vertical support member together as a unitary assembly.

Abstract: A thread winding mechanism for a sewing machine head includes a main drive shaft for operating the sewing components and which is rotatably mounted within the head of the machine, a flywheel rotatably mounted on the drive shaft, a clutch for connecting and disconnecting the flywheel from the drive shaft, and a motor for driving the flywheel. A thread winding shaft is formed integrally with and extends axially outward from one end of the flywheel to the exterior of the head and a clutch operating handwheel mounted on and rotatable with the flywheel and which likewise extends outside the head can be shifted axially between an inward position wherein the flywheel is disconnected from the drive shaft and the thread winding shaft is exposed, and an outward position wherein the flywheel is connected to the drive shaft and the thread winding shaft is concealed within the handwheel.

Abstract: A sewing machine having the usual type needle thread taking up lever and the path through which the needle thread travels almost unrevealedly nested within a housing defined by the end face of the arm and a cover to be attached for safety purpose and additionally neat appearance purpose. The sewing machine is further characterized by provision of a separator within the housing in parallel with an internal front face of the cover so as to provide the lever with a space of suitable volume for preventing a loop passing through a thread guiding eye of the lever from being fallen off the eye when the lever is on its slackening stroke.

Abstract: A pattern indicator mechanism for a sewing machine includes a pattern selector knob rotatably mounted on the machine and which is operatively connected to a pattern selector cam mechanism, and a pattern indicator plate having a plurality of patterns illustrated thereon also operatively connected to the pattern selector cam mechanism for indicating a pattern selected by the pattern selector knob. Also included is a feed length indicator plate operatively connected to the pattern selector cam mechanism which automatically indicates a feed length corresponding to the pattern chosen by the selector knob.

Abstract: An extension table for attachment to a sewing machine head of the portable type for enlarging the somewhat limited working area provided by flat upper surface of the bed in which the bobbin mechanism is housed under the needle and presser foot wherein the table is pivotally mounted on a support structure associated with the machine in such manner as to enable it to be shifted between a vertical position along one side of the machine for storage with the latter within a case, and a horizontal working position co-planar with the upper surface of the bed. The table has an elongated L-shaped configuration and is mounted on the supporting structure in such manner that when in its horizontal working position the short and long sides thereof respectively lie adjacent the end and side walls of the machine bed.