Abstract: A fine jewelry chain made of precious metal, base metal, or metal alloy, which may be used by day as an ID card holder in the form of a necklace, bracelet, belt, or watch-type chain, and by night as a piece of decorative jewelry in the form of a necklace, bracelet, belt, or watch-type chain. The chain includes a looped metal clasp which may be used to hold an ID card, transparent ID card holder, pendant, or charm, or to secure the necklace to itself, thus creating a double-stranded “choker” style of necklace. The chain may also be worn in the lapel, draped through belt-loops, or otherwise strung around a portion of clothing or of the body. Decorative charms may also be purchased and the chain threaded through said charms to create a more unique or individual piece of jewelry. The ID cards and charms strung from the chain may also incorporate embedded chip technology, which would allow for the download and storage of personal security information.

Abstract: A flexible piece of jewelry, such as a charm bracelet or necklace, that utilizes non-continuous chain links that constitute the continuous chain of the piece of jewelry. This link design allows more non-continuous links to be added to the bracelet as the child grows and the need for a larger piece of jewelry evolves and minimizes damage to the piece of jewelry caused by the addition of additional charms or links.

Abstract: A system and method for heating, forming, and tempering a glass sheet includes pre-heating the glass sheet to at least a first predetermined temperature. The system and method includes also applying radio-frequency energy to the glass sheet to heat it to at least a second predetermined temperature and cooling at least one outer surface of the glass sheet to at least a third predetermined temperature to temper the glass sheet.

Abstract: An elongated fused quartz member is disclosed having alkali metal impurities being removed therefrom when initially formed. The impurities are removed by an electrolytic procedure accompanying formation of the elongated fused quartz member. Apparatus for carrying out the electrolytic removal procedure is also disclosed.

Abstract: A manual glass lathe used for shaping and coloring clear glass tubes. The manual glass lathe, in the preferred embodiment, comprises a tubular handle, designed to be held in one hand, and a thumbwheel located towards the working end of the handle, and is used by a glass-blower to precisely control the spin of a glass workpiece and the proximity of the workpiece to a flame and to various shaping tools and/or fuming rods. The handle makes use of an interior arrangement of bearings and o-rings to center and hold the mandrel, and also comprises an inner sleeve used as an inertial weight to enhance spinning momentum. Also a method for using such a manual glass lathe to shape and fume glass workpieces.

Abstract: A glass base material manufacturing apparatus for manufacturing a glass base material comprising: a plurality burners, arranged in a row at a predetermined intervals along the longitudinal direction of a starting base material of the glass base material, for forming a deposit, which is a base material of the glass base material by depositing glass soot on the starting base material while moving reciprocatory over a section of the entire length of the starting base material along the longitudinal direction of the starting base material; a plurality of flow rate regulators, at least one of which is connected to the plurality of burners, respectively, for regulating a flow rate of raw material gas of the glass soot, which is supplied to the plurality of burners; and a control unit connected to each of the plurality of flow rate regulators for controlling individually the plurality of flow rate regulators.

Abstract: A process is suited for producing cylindrical silica glass bodies having refractive index gradients. The process involves providing a cylindrical porous body having an initially uniform dopant distribution, heating the porous body in a halogen-containing atmosphere to produce a dopant gradient sufficient to produce a reduction in &Dgr;n of at least 20% from the center of the body to 90% of the distance from the edge of the body, and completely densifying the porous body at an elevated temperature to produce the glass body. The process is more cost-effective than those previously known, and allows for high reproducibility of the refractive index gradients of the bodies produced.

Abstract: The present invention relates to a method for improving the thermal performance of fibrous glass insulation in the admix recycling of the insulation, which includes the use of corrugated hose in the recycling process.

Abstract: A circular double-cylinder hosiery knitting machine with a device for removing and transferring the article at the end of the knitting process, comprising a lower and an upper needle cylinders with vertical axis, a device with a removal element insertable from above into the upper needle cylinder, provided with first grippers that engage the final end of the article and a transfer element, arranged above the upper needle cylinder to remove the article from the removal element and to feed it to a sewing machine.

Abstract: A needle (1) for loop-forming machines has a needle body (2) with two even flat sides (6, 7), which are joined to one another an the top and sides of the needle by narrow sides (5, 8). A narrow slit opens out at one of the narrow sides and extends parallel or at an acute angle to the flat sides (6, 7) into the needle body. A substantially rectangular fastening portion (21) of the transfer spring (14) is retained in this slit (16), by positive and/or nonpositive and/or material engagement.

Abstract: A drum type washing and drying machine includes a rotary drum, a water tub including therein the rotary drum, a water supply member for supplying cooling water into the water tub, a heater for heating air, a blower for blowing the heated air into the water tub to evaporate moisture from laundry articles in the water tub and a dehumidification means for cooling and dehumidifying air containing the evaporated moisture by the cooling water. The dehumidification means is provided in a space between the water tub and the rotary drum.

Abstract: An apparatus embodying one or more aspects of the invention secures moveable objects such as computer hardware into position within a support rack by blocking one or more points of ingress and/or egress from the rack. An embodiment of the invention provides a mechanism for securing the moveable object into a fixed position within a support rack or any other system for holding such hardware. When the moveable object is locked within the support rack using the invention, an unauthorized party cannot move the physical object held within the support rack. In one or more embodiments of the invention, a constraining apparatus and a locking apparatus are disposed to control access and prevent the addition or removal of contents within an object. In one or more embodiments of the invention, a constraining apparatus and a locking apparatus are disposed to control access and prevent the addition or removal of contents within an object.

Abstract: A lock system for a horizontal tool box wherein the latching mechanism for the lid may be operated from the proximal end of the toolbox and locking is achieved by means of a single padlock which is likewise located at the proximal end of the toolbox. An elongated latch rod is slidably disposed adjacent a front wall of either the body or lid components of the box. Latching portions of the latch rod are disposed to slidingly engage flanges that extend from the opposite component of the box to latch the components together at multiple locking points, the elongated latch rod being slidably disposed to engage or disengage each locking point substantially simultaneously.

Abstract: An improved burglarproof locking device for a vehicle is disclosed. The locked status of the locking device is not released by a strong impact or by an external magnetic force, thereby preventing the car from being stolen. Thus the reliability of the locking device is improved.

Abstract: A lock device is provided for use with a truck semi-trailer. The semitrailer has a dolly wheel or landing gear system alternately configurable between a trailer support configuration and a trailer travel configuration. The lock device comprises a rigid, one-piece hollow box adapted to fit over and enclose portions of both a crankshaft and a drive shaft of a dolly wheel or landing gear system so as to prohibit movement of a crank into a crank operating position. The box has first and second adjacent but mutually perpendicular closed sides which are adapted to be located adjacent to portions of the crankshaft and the drive shaft. Third and fourth adjacent but mutually perpendicular box sides are at least partially open and are adapted to permit the crankshaft and the drive shaft to extend therethrough. Fifth and sixth mutually parallel sides are located perpendicularly to and at the edges of the first, second, third and fourth sides.

Abstract: A plastic conduit bender comprises an integrally molded handle and head portion. A steel hook reinforcement is molded directly into the head portion to provide sufficient force for bending the conduit. Steel reinforcements can also be provided in a grip region of the handle. A plurality of vertical sight lines, indicating bend angles, are provided from an apex molded into the handle and extending to an arcuate shoe portion, allowing the user to gauge the approximate bend angle. A flat surface including rounded saddle portions for receiving the conduit is positioned on the handle to allow the conduit to be bent back or straightened, the rounded saddle contact surfaces preventing damage to the conduit as it is bent back.

Abstract: A method and apparatus for testing sensors in a fluid flow conduit to verify the accuracy of the flowmeter of which the sensors are a part. Where two similar sensors are employed, active and reference sensor functions are interchanged to verify their functioning accuracy. Alternatively, different stimulation levels can be used to provide a basis for cross-correlation of sensor outputs. A single, or multiple, time-shared sensor can be employed in place of two sensors. Transient or steady state responses are employed. Many sensor types can be used.

Abstract: Method for measuring friction in a hair sample, comprising: (a) providing a friction member; (b) drawing it through the hair, generating a frictional noise signal; and (c) capturing the signal by a noise sensor. Device suitable for use in said method, comprising comb means having a plurality of tines and a noise sensor arranged to capture frictional noise generated by passage of comb means through the hair. System for assessing the level of damage in a hair sample, comprising: (a) defining hair categories; (b) associating with each category a standard trace representative of the frictional noise signal generated when a standard sample in that category is subjected to said method; (c) assigning the sample to one of the categories; (d) carrying out said method on the sample; (e) visually displaying the frictional noise signal generated as a trace; (f) and comparing the sample's trace with the standard trace associated with the category.

Abstract: A high-sensitivity, separation microcolumn assembly for a microgas chromatograph and the like is provided. The assembly has an ultra-low mass complete with integrated heaters. The assembly uses multiple zones for temperature control, and microstructures that permit very rapid heating and cooling of the microcolumn.

Abstract: The present invention is a sample valve for use in conjunction with a gas chromatograph. The sample valve design provides for both the inertness and low permeability performance of a diaphragm, and an elastomeric material to apply adequate sealing pressure to the diaphragm to seal with the mating surface of a center plate of the sample valve. This valve design allows the active sealing surface to be well polished without the previous concern for maintaining critical flatness of the mating surfaces of the machined parts.

Abstract: A molecular contamination monitor for monitoring molecular contamination on a surface of a subject surface susceptible to degradation by a molecular contaminant. The monitor includes a surface acoustic wave (SAW) device having a SAW measurement surface coated with a material that is equivalent to the subject material with respect to spontaneous contamination by a contaminant. In the preferred embodiment, the coating comprises the same material as the subject surface or a material that interacts chemically with the contaminant in an equivalent manner to the subject surface. Exemplary coatings include: photoresist, copper, silver, gold, platinum, titanium, tungsten, aluminum, nickel, metal oxides, stearic acid, silicon, gallium arsenide, gallium nitride, germanium, silicon germanium, silicon dioxide, silicon nitride, and glass. Exemplary coating methods include sputtering, CVD, ALD and misted deposition.

Abstract: A porosimeter evaluates the porosity characteristics (specifically, pore volume, pore distribution and liquid permeability) of a porous sample of material. The porosimeter includes a fluid reservoir located below the sample, and a penetrometer comprising a vessel which catches any fluid displaced from the reservoir of fluid, wherein a level of fluid rises in the penetrometer when additional fluid enters the penetrometer. The sample is preferably wetted, with the same type of fluid which is in the reservoir, prior to placing the sample on the porosimeter. The porosimeter preferably also includes a membrane located between the sample and the reservoir of fluid. The membrane has pores with a size smaller than any of the sample pores. Pore volume of the sample is determined by measuring the change in fluid level in the penetrometer after pressure, which is above the bubble point pressure of the sample but below the bubble point pressure of the membrane, is applied to the sample.

Abstract: The invention relates to a method for operating a film leak indicator (1) comprising two films (5, 6), which are each tensioned inside a frame (3, 4) and which delimit a testing space (80) when a test piece (79) is introduced. In addition, said film leak indicator is equipped with two vacuum pumps (13, 20). According to the invention, the testing space (80) is firstly evacuated and the film leak indicator is switched over to a leak search mode after the evacuation is completed. In order to prevent the search for leaks from being impaired by fluctuating helium concentrations in the ambient air, the invention provides that, before starting the leak search process, the helium concentration of the ambient air is measured and this measurement is taken into account during subsequent leakage measurements.

Abstract: A rotational rheometer is provided with a heat control cup located around a measuring cup having a wall thickness decreasing gradually from the bottom of the cup to its outer rim. Temperature of the heat control cup is maintained by a heat pump. The heat controlled cup has a wall thickness which is narrow at or adjacent the open end than the thickness adjacent the base of the cup.

Abstract: To conduct a fluid, the transducer has a flow tube which in operation is vibrated by an excitation assembly and whose inlet-side and outlet-side vibrations are sensed by means of a sensor arrangement. To produce shear forces in the fluid, the flow tube is at least intermittently excited into torsional vibrations about a longitudinal flow-tube axis. The transducer further comprises a torsional vibration absorber which is fixed to the flow tube and which in operation covibrates with the torsionally vibrating flow tube, thus producing reactive torques which at least partially balance torques developed in the vibrating flow tube. One of the advantages of the transducer disclosed is that it is dynamically balanced to a large extent even in the face of variations in fluid density or viscosity.

Abstract: A comparator for determining a degree of erosion on a metallic surface of a part including a panel having a plurality of cells arranged on a side of the panel, wherein each cell has a surface finish representative of a certain surface condition of the part, and each surface condition replicates a degree of erosion on the metallic surface of the part.

Abstract: A scanning probe microscopy tool with innovative sensing system is provided by the present disclosure. This scanning probe microscopy tool includes a special cantilever with partially reflective surfaces that makes the scanning probe tool more capable. This scanning probe microscopy tool also includes at least one light source that illuminates the cantilever with a light beam that need not be focused and may be collimated. In addition, the light beam may be larger than the size of the oscillator and may illuminate more than one cantilever. This scanning probe microscopy tool also includes at least one detector where the preferred detector is a continuous position sensitive detector. The innovative sensing system enables CD-AFM tool configurations where the probe may be twisted about its long axes as to better access vertical and re-entrant surfaces of features, including challenging semiconductor device features with high aspect ratio.

Abstract: A method provides a sharpened Multi-Walled Carbon NanoTube Scanning Probe (MWCNT-SP) for a Atomic Force Microscopy (AFM). The MWCNT-SP is attached to a cantilever and help in the FMA. The tip of the MWCNT-SP is positioned in contact with a conducting substrate, and a voltage source is connected to the MWCNT-SP and to the substrate. The outer layers of the MWCNT-SP become hot, and the outermost carbon layers burns off, thereby creating a point on the MWCNT-SP.

Abstract: A tire pressure monitoring system, comprising:

Abstract: The invention comprises wireless low frequency downhole detection, monitoring and communication capable of operation at greater depths than prior methods and capable of detection with standard equipment and/or standard data, thereby improving system cost, utility, reliability and maintainability.

Abstract: Method and apparatus are provided to exchange fluid in a system such as a transmission system. Supply and return flow rates are measured and can be adjusted based on a difference between the flow rates.

Abstract: A liquid level sensor includes a housing with circuitry provided therein. An inner and outer tube extend from the housing. The inner tube is positioned within a hollow center of the outer tube to form a coaxial configuration. A slot extends through the wall of the outer tube into the hollow center of the outer tube. The slot extends essentially the entire length of the outer tube. The circuitry, outer tube, and inner tube form a capacitive circuit to measure liquid. The slot allows the liquid to flow more easily into the hollow center of the outer tube and between the inner tube and outer tube to allow the sensor to provide accurate measurements with many types of fluids. The circuitry generates a pulse width modular output which is sent to a gauge to provide a visual representation of the level of the fluid in the container.

Abstract: A method and apparatus for determining stiffness of a plate-like structure including a monolithic or composite laminate plate entails disposing a device for generating an acoustical pulse against a surface of the plate and disposing a detecting device against the same surface spaced a known distance from the pulse-generating device, and using the pulse-generating device to emit a pulse so as to create an extensional wave in the plate. The detecting device is used to determine a time of flight of the wave over the known distance, and the wave velocity is calculated. A Young's modulus of the plate is determined by a processor based on the wave velocity. Methods and apparatus for evaluating both isotropic plates and anisotropic laminates are disclosed.

Abstract: A system and corresponding method for determining the frequency and/or amplitude of an oscillating apparatus, which includes a driving assembly having a stator portion and an armature portion, and a driving signal circuit which supplies a driving signal to the stator portion. A control circuit interrupts the drive signal momentarily, for at least a quarter of a cycle, at periodic intervals, resulting in a signal being induced into the stator coil from continuing movement of the armature. A measurement/read circuit is connected to the stator coil for determining one or both of the frequency of the induced signal and the amplitude of the induced signal. The frequency or amplitude information is then compared against pre-established values and any differences are used to change the driving signal so as to provide maximum performance of the appliance.

Abstract: To conduct a fluid, the transducer has a flow tube which in operation vibrated by an excitation assembly. Inlet-side and outlet-side vibrations of the flow tube are sensed by means of a sensor arrangement. To produce shear forces in the fluid, the flow tube is at least intermittently excited into torsional vibrations about a longitudinal flow-tube axis. An internal portion of the transducer, formed at least by the flow tube, an antivibrator, the sensor arrangement, and the excitation assembly and mounted at least on the inlet and outlet tube sections, has a centroid which is located inside the flow tube. The transducer is suitable for use in viscometers or Coriolis mass flowmeter-viscometers. In spite of using only a single straight flow tube, it is dynamically well balanced in operation, and the development of bending moments by the torsionally vibrating flow tube is largely prevented. This also effectively prevents the transducer case or the connected pipe from being excited into sympathetic vibration.

Abstract: In a method of detecting discontinuities on elongated workpieces, in particular tubes and bars, using ultrasonic testing system, a test object is positioned in relationship to a test head of the testing system, with the test object and the test head being moveable to one another. Signals from the test head are transmitted to an evaluation unit, where they are digitized and evaluated. The digitized signals of a test shot of a length position X are compared with digitized signals of a test shot of a length position X+&Dgr;X, wherein &Dgr;X is a multiple of a shot distance, and the difference is evaluated.

Abstract: The present technique provides a system and method for ultrasonically testing a tubular good through a fluid medium using a movable ultrasonic test assembly. The movable ultrasonic test assembly has a fluid chamber, which is open to an outer surface of the tubular good. Ultrasonic transducers are mountable in the movable ultrasonic test assembly, such that ultrasound waves are transmittable through fluid between the tubular and the ultrasonic transducers. The movable ultrasonic test assembly also may have a removable interface structure, which serves as a replaceable wear surface for movably supporting the ultrasonic test assembly on the outer surface of the tubular. A variety of positioning and control system also may be provided to perform an ultrasonic test of the tubular. For example, the positioning and control system may have drive assemblies for rotating the tubular and moving the ultrasonic test assembly along the tubular.

Abstract: The invention relates to a sensor arrangement with a pressure detector (6) that has a measuring diaphragm, which can be deflected by the pressurized measurement medium. A measuring bridge is provided as a sensor circuit, which is attached directly to the measuring diaphragm. An evaluation circuit is embodied as a hybrid circuit (8) and can be fastened directly to the measuring diaphragm, producing electrical connections (9, 10) between the hybrid circuit (8) and the sensor circuit and a ground connection to the housing (2, 3) of the sensor arrangement (1). The housing (2, 3, 4) of the sensor arrangement (1) is embodied as multi-part and the contacting of the connections of the hybrid circuit (8) with connector pins (11) of the connector (4) can be produced, for example, by means of pressure contacts (12, 13; 23).

Abstract: A variable capacitance measuring device can comprise any one or more features in various different embodiments allow a reliable, compact device to be achieved. A capacitor electrode, a gettering housing, and pinch-off connector may be aligned along a common axis may reduce width dimensions without a substantial increase in length. Temperature-induced variations may be reduced by selecting materials that have coefficients of thermal expansion relatively closer to one another. Substantially varying topologies for ceramic-metal interfaces may reduce the likelihood of external contaminants from reaching the evacuated portion of the device. A tube can be used between the capacitor portion and a gettering housing to isolate external forces and getter activation heat from the sensor. The same tube also reduces heat loss from a heated sensor and protects the electronics from overheating. Embodiments also include processes for using and forming the devices.

Abstract: A variable capacitance measuring device can comprise a glass-ceramic insulator having a coefficient of thermal expansion that closely matches the coefficient of thermal expansion of a metallic materials used within the device. The glass-ceramic material may chemically bond to the surfaces of the metallic materials to provide a hermetic seal and eliminate the need for a separate glass seal or grooves within the electrode assembly. Additionally, a single-piece electrode assembly can be used instead of a separate electrode assembly (for the electrical feedthrough) and electrode. A shim may be used during the formation of the insulating material to reduce the likelihood of the insulator adhering to surfaces of the electrode portion during the manufacturing process. Also, separate bake-out and getter activation cycles may be combined into a single heat cycle.

Abstract: A pressure sensor housing and assembly is disclosed. The pressure sensor may have a manifold and a header comprising one integral unitary housing. The unitary housing may have a pressure inlet in communication with an elongated tube. The unitary housing also may have a sensing die coupled to the elongated tube in order to receive pressure input signals through the pressure inlet. The sensing die may detect an applied pressure and derive an electrical signal from the applied pressure.

Abstract: A fluid measuring device that displays fluid volume usage against fluid volume limits and a fluid control device that stops fluid delivery when the fluid volume limit is reached.

Abstract: Projecting ends of terminal conductors projecting out of a thick portion of a holder and electrode terminals of a flow rate detecting element are electrically connected by bonding wires. A peripheral wall member is secured by an adhesive to a thin portion of the holder and the flow rate detecting element so as to surround the electrical connection portions between the projecting ends and the bonding wires and between the electrode terminals and the bonding wires. A gel is formed so as to seal the electrical connection portions, and a rubber is injected into and cured inside the peripheral wall member so as to seal the gel.

Abstract: An acceleration signal generating portion 11 inputs a machine velocity vm of a drive machine 32 and outputs an acceleration signal af of low frequency. Also, a pseudo torque signal generating portion 12 inputs a torque command &tgr;r, removes the noise, and outputs a pseudo torque signal &tgr;f of low frequency. Also, a torque error signal calculating portion 14 subtracts a product of the acceleration signal af and a previous mechanical constant estimated value Je(k−1) calculated in a multiplication circuit 13 from the pseudo torque signal &tgr;f of low frequency, and outputs a torque error signal &tgr;err as a disturbance torque estimated value &tgr;d0. Also, a mechanical constant estimation gain portion 16 estimates the mechanical constant by inputting a torque error derivative signal d&tgr;err that is generated by torque error derivative signal generating portion 15 by inputting a torque error signal &tgr;err.

Abstract: A system and method for determining a torque value within a transmission, whereby an actual torque is determined from an axial force of a torque-transmitting helical gear wheel in the transmission, particularly from a measured bearing force of this gear wheel.

Abstract: A torque sensor includes first and second shafts, an elastic shaft, a magnet, a pair of ring plates, and a magnetic sensor. The elastic shaft connects the first and second shafts coaxially. The magnet is fixed to the first shaft. The pair of ring plates is fixed to the second shaft, and faces each other in an axial direction of the elastic shaft so that the pair of ring plates sandwiches the magnet. The magnetic sensor is disposed in a gap between the pair of ring plates so that the magnetic sensor detects a magnetic flux density in the gap. Each ring plate includes a convexity and a concavity in an inner circumference of each ring plate, respectively. The pair of ring plates is rotatable against the magnet in accordance with a twist of the elastic shaft so that the rotation of the ring plates causes the magnetic flux density in the gap.

Abstract: A system for the retrieval and initial conditioning of sample gas for “on line” analyzers or filling of gas sample cylinders. The preferred embodiment of the present invention contemplates a system configured to obtain a representative gas phase sample from a process gas containing entrained liquid, or a process gas which generally is highly susceptible to partial condensation of some gas phase components. The preferred embodiment of the present invention teaches an assembly including a phase separation membrane and housing configured to facilitate the removal of entrained liquid from a sample gas stream. Accuracy of the sample is enhanced, and compositional changes are avoided by first extracting a sample from the process gas followed by removal of entrained liquid it may contain, with the entrained liquid removal being conducted at the prevailing process gas pressure and temperature.

Abstract: The present invention is directed, in general to a mail piece and more particularly, a mail piece for collecting sample(s) of harmful materials from a mail processing device. The mail piece generally comprises: an air inlet, an air outlet and a collector. In an embodiment of the present invention, the mail pieces inlet is a material which causes sides of the mail piece to separate from one another when the mail piece is not under the pressure of a nip roller or similar grabbing device. In another embodiment of the present invention the collector is a filter present within the mail piece. In another embodiment of the present invention the collector is a filter or tacky material present inside the mail piece or on the out side of the mail piece. In another embodiment of the present invention, the mail piece is porous.

Abstract: A self contained dispensing head apparatus wherein a modified pipette tip box tray carrier is utilized to furnish pipette tips, carried in a standard pipette tip box, by a pipette tip box tray carrier to the head apparatus and wherein means are provided to engage the pipette tip box tray carrier in a manner whereby the pipette tips are loaded into corresponding internal cylinders formed in the dispense block head. The dispense block head comprises a solid block of material having a plurality of internal cylinders to engage the pipette tips in a sealing arrangement. The pipette tips are modified from the conventional design in that a disk-shaped ring portion is interposed adjacent one end of the pipette tip, a tapered end of the tip allowing a seal to be formed with the dispense block head internal cylinders.

Abstract: The invention relates to a sample handling device for an analytical device, comprising a sampler provided with a holder, a movable holding arm for the holder and a support for the holder, said support being arranged in a stationary manner with respect to the holding arm, said holder being transferable between a suspended position on the support and a position located on the holding arm and being releasable from the holding arm by a pulling force exerted by the holding arm substantially perpendicular to the longitudinal direction of the latter.