Abstract: Mechanical perspective drafting device, characterized by a first drafting board which is fitted with a second drafting board with a fixed support which includes a universal joint through which a long member can slide and rotate freely, the long member being fitted with a drawing device ending with a point which can come in contact with the second drafting board, the line which is connecting the universal joint and the point is passing through an imaginary three dimensional figure and this causes the point to draw a perspective projection of the figure as it is seen from the position of the universal joint, the movement of the line through the figure is assisted by a tracing guide which guides the long member.

Abstract: The present application discloses a liquid mixing method and apparatus which can mix two or more liquids in selected proportions. Each constituent fluid is introduced in a chamber provided with liquid level controlling devices that establish a liquid free head space which is connected to a source of pressure gas operative to pump or displace liquid from the chamber through a metering device prior to the introduction to a chamber where the constituent fluids combine.

Abstract: A quiet by-pass vacuum motor wherein a ring-like cavity is defined between inner and outer walls of the housing for a working air fan. Separating members divide the cavity into passageways which communicate with openings in the housing. A plate having a plurality of vanes thereon is received upon the separating members, the plate extending from the outer wall to a position short of the inner wall. A baffle plate is then received upon the vanes. Working air is exhausted over the baffle plate, between the vanes, over the plate and between the separating members and through the openings. The exhaust path greatly reduces the noise level of the vacuum motor.

Abstract: A magnetic can separator where a supply device drops crushed cans onto a mechanism that includes a non-magnetic separator disc positioned by a shaft for permitting rotation of the disc at a controlled speed, a plurality of magnetic members secured to the under surface of the disc for attracting magnetic cans and retaining them on the disc, and a guide secured adjacent to and above the top surface of the disc to engage any articles thereon and extending generally radially of the disc offset from its center to engage cans or articles on the upper surface of the disc and as the disc is rotated, the crushed cans are progressively stripped from the upper surface of the disc by the guide whereas the non-magnetic cans are thrown circumferentially from the disc substantially immediately upon deposit thereon. The separator disc can be positioned at an angle of up to about 50 degrees to the horizontal for improved operation.

Abstract: A multiple disc torque limiting clutch is presented. A stack of friction discs are splined to an output hub with a stack of separator discs interposed therebetween and keyed to a housing. Spring cup assemblies are positioned through openings in the separator discs to urge the separator discs into forceful contacting engagement with the friction discs. The spring cup assemblies include a compressed helical spring maintained within a cylindrical member and transmitting the spring force through the cylindrical member against the stack of separator and friction discs. The housing elements are of substantially unitary construction, with no relative movement capable therebetween. A wear indicator passes through the housing and indicates the degree of wear of the disc elements, while clearances between the interior of the clutch and the exterior are maintained at a minimum to provide a substantially explosion proof unit.

Abstract: An useful method of producing a lot of bearings in the form of a press worked bush is initiated with production of blanks having four corner edges chamfered. In the notch forming and cutting die section comprising upper and lower die halves a strip of metallic material that is called hoop is pressed stepwise to form a plurality of V-shaped notches of which depth increases stepwise toward the outlet of the die section. On completion of forming of notches the hoop is cut off at the center of the last V-shaped notch with the aid of a pair of cutting tools. The die assembly usable for carrying out the method includes an U-bending die section and a circle bending die section which are located in series.

Abstract: A seat cover comprises a knitting of a three-dimensional structure conforming in its external shape to that of a seat and including at least main portions, side portions and welt portions integrally knit into a one-piece form. The knitting further includes integrally knit portions covering overhang portions and corner portions of the seat and/or rear and bottom portions of a front back of the seat.

Abstract: In the control of the slip in a slip clutch device for joining and separating an input shaft and an output shaft, the improvement comprises detecting a slip in the clutch, calculating a time change in the said slip and calculating a slip deviation between a preset target slip and the said slip, and feedback-controlling the engaging force of the clutch in proportion to the quantity of the time change in the said slip, obtained from these calculations, and the slip deviation so that the slip in the clutch is caused to get near to the target slip.According to the slip clutch device control method of this invention, the hunting in slip can be prevented from being caused even when the .mu.-v characteristics of a clutch facing is worsened, and a shock applied upon the clutch at the start of its operation can be reduced in a large extent.

Abstract: A dichroic dye-containing nematic liquid crystal mirror has a photocell connected thereto to automatically change, that is, to dim or brighten, the mirror upon exposure to light. Under the preferred operating conditions, the mirror functions as an ordinary mirror but is dimmed by light. The invention is especially suited for the rearview mirror of an automobile.

Abstract: To provide an electrically conductive path between metal pipes, e.g. soil or drain pipes, connected at butting ends by means of an annular gasket of electrically insulating material which fits around and spans the butting ends and is secured in sealing engagement with the butting ends by clamp, a bridge element of electrically conductive material retained to the gasket extends between and engages with the pipes. The bridge element is conveniently an attachment to the gasket having portions disposed at internal and external circumferential surfaces of the gasket. Teeth or like formations on the bridge element dig into the surfaces of the pipes to enhance the engagement. Electrically conductive engagement may also be made with the clamp at a portion of the bridge element at the exterior of the gasket.

Abstract: An adjustable mask for supplying a desired atmosphere to the wearer is disclosed. This mask may be either an oxygen mask or a mask for removing dust or pollen. The mask has overlapping upper and lower sections. The area of overlap can be made larger or smaller depending on the facial length of the wearer. The area of overlap is larger for a smaller adult, and smaller for a larger adult. Gripping means, shown herein as snaps and eyelets, are provided on both sections in the area of overlap so that the two sections can be adjustably secured to each other. These gripping means can also consist of velcro or any substance allowing the two mask sections to fit together snugly.

Abstract: An emergency warning device comprises an alarm signal circuitry incorporated in the telephone lines of various telephone systems such as an existing party-line telephone system, or interphone system and it is adapted to issue an alarm call in case of emergency. The control circuitry provides a warning message of a state of emergency affairs that can be given to a user by a party-line telephone or the like in case of emergency.

Abstract: In a self-energizing disc brake of the spreading type the recesses in the pressure plates in which the balls are housed, are machined directly into the material of the plates on pitch circles in the two plates of corresponding diameters. Each recess comprises an inclined ramp surface terminating at opposite ends in first and second end portions of which the end portion at the deeper end is engaged by the ball in an "off" position of brake, and the second portion is engaged by the ball to preclude further relative angular movement between the plates in brake-applying direction, thereby indicating a "wear stop". In addition ramp surfaces of different slopes may be located between the end portions so that an increased brake-applying effort towards a fully worn lining condition provides a wear warning device.

Abstract: A visco-elastic composition that is a cohesive mass consisting of an aqueous guar gum matrix constituting a continuous phase and having an aqueous detergent incorporated into the interstices of the continuous phase and constituting a discontinuous phase. The above-described composition is relatively dry to the touch and when kneaded mechanically or by hand releases the discontinuous detergent phase. The crosslinked guar gum matrix thus describes being of a nature so as to be destabilized by mildly acidic condition such as contact with skin causing the release of the soap solution.

Abstract: A phased array antenna system capable of scanning at rates faster than the information rate of signals being received to prevent the loss of information during the scanning process. The phased array is configured to add the capability to provide multi-dimensional separation of multiple signals to enable measurement of direction of arrival and frequency, and to eliminate the sensitivity loss due to sampling usually encountered with such rapid-scan systems. The array antenna system is comprised of the means to form multiple, time-sequenced responses, each response corresponding to a different beam of sensitivity. The beams scan the full coverage sector and together with each other form a contiguous set of beams that both fill the coverage sector at any one time and also synchronously scan the full coverage sector.

Abstract: In a spring type clutch disc, torque is transmitted from a disc plate (2) to a hub (3) through coil springs (12, 13). A slide member (11b, 14) making sliding contact with the hub (3) is interposed between the disc plate (2) and the hub (3). An electroless plate Ni coating is provided on one of the slide member (11b, 14) and the hub (3), while an electroless plate Ni-P-BN coating is provided on the other, so as to stabilize the coefficient of friction of and improve the wear resistance of the slidingly frictional engaging portion therebetween, whereby the first-stage hysteresis torque in the torsional characteristic of the clutch disc is stably maintained at a minimum.

Abstract: A windmill having a rotatable vertical shaft and a rotor secured thereto. The rotor has a plurality of base circumferential wings for collecting the wind. Each wing includes a vertically extending cylindrically curved surface, preferably a half cylinder, and top and bottom end plates. Each curved surface has a plurality of vertical metal reinforcing strips on its concave side extending from top to bottom. These reinforcing strips strengthen the windmill and improve its efficiency. Rotation of the shaft and motor generates power which may be used to drive an electric generator, an air compressor, or other energy transducer devices.

Abstract: The invention relates to a method for the interference-free testing with guided waves for faults, through cyclic production and reception of ultrasonic waves, through assessment of the received HF-signals for signal components, which derive from faults and through evaluation of the result. In order to reliably improve the capabiliy of assessing the received HF-signal over the greatest possible lengths covered and thereby to enable the testing for faults to be carried out at a high speed and a high degree of reliability, it is proposed that the received HF-signals are digitalized within the cycle and that from the digital HF-signals of several successive cycles average values are formed and these are likewise rectified with the aid of a computer and in each case are filtered and assessed with a threshold value characteristic and if required a signal analysis for faults in the testing path.

Abstract: A detection system for utilization with a paper security or currency validation apparatus wherein a correlation is made between reference patterns and cross hatch lines located in the portrait background on the paper and the presence of one of two paper currencies is determined. Fundamentally the invention consists of a single reticle which contains a lens whereon are located the cross hatch references for two different paper currency denominations. Within the reticle assembly are located two photosensitive cells, one for each reference pattern. Each photosensitive cell is connected to its own authenticating circuitry which validates the presence of a specific paper currency note. Should the tested paper pass the authenticity test of one authenticity circuitry, the other is disabled. Should the tested paper fail both authenticating tests, it is rejected.

Abstract: A torque limiting clutch having one or more friction surfaces placed under pressure by pre-compressed helical springs employed for eliminating adjustment and compensating for wear of the clutch during use. In one embodiment of the invention, the springs are pre-compressed on pins for ease of assembly. An embodiment of the invention also provides for axial locking of input shafts centrally of the input hub, while including an indicator of friction surface wear.