Classifications

• • A—HUMAN NECESSITIES
  • A62—LIFE-SAVING; FIRE-FIGHTING
  • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
  • A62B35/00—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion
  • A62B35/04—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion incorporating energy absorbing means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B64—AIRCRAFT; AVIATION; COSMONAUTICS
  • B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
  • B64F1/00—Ground or aircraft-carrier-deck installations
  • B64F1/02—Ground or aircraft-carrier-deck installations for arresting aircraft, e.g. nets or cables
  • B64F1/029—Ground or aircraft-carrier-deck installations for arresting aircraft, e.g. nets or cables using a cable or tether

Definitions

• the present invention concerns a means as de ⁇ fined in the preamble to claim 1.
• the means of prior art formed of ribbons made of textile material is typically manufactured of two ribbons which have been joined by stitching or weaving over a given distance, to constitute a juncture region. Outside of this juncture region, part of each ribbon has been left unjoined so that traction members can be formed.
• the first end of each ribbon is joined to the other end of the same ribbon to form a .traction member.
• the traction member formed of the first ribbon is connected to the body and the traction member formed of the second ribbon is connected e.g. to a fixed support.
• the juncture region between the ribbons begins to come apart.
• the kinetic energy is absorbed in the tearing asunder of the bonds between the ribbons, and a force braking the motion is produced.
• the means is divided into to separate ribbon parts and opens up completely. The problem with this means of prior art is that it opens up completely after the absorbing capac ⁇ ity of the juncture region absorbing kinetic energy, that is the length of the juncture region, has been exhausted.
• An opening means of this kind is not appro- priate in those applications in which the intention would be to use the means to stop completely the motion of the body connected to the means if the body which should be stopped still has kinetic energy left after exhaustion of the juncture region's capacity.
• Such a situation could for instance occur when the means is used as fall retardant by a person working in high places, or in an airplane arresting system, connected between the arresting net and a fixed support in con ⁇ secutive series connection.
• a prerequisite for func ⁇ tioning of such a series arrangement is that each means at the end of its own functioning transmits the trac- tion to the next means, and so on.
• the object of the invention is to eliminate the drawbacks mentioned.
• the specific aim of the invention is to pre ⁇ sent a novel means which is well appropriate to be turned out in series production.
• first ribbon and the second ribbon are disposed together to transmit loads after the juncture region has opened up.
• the first ribbon and second ribbon have, joined together, been twisted at least 180" about their longitudinal direc ⁇ tion in the juncture region.
• the ribbons may be twisted e.g 180', 360 ⁇ , 540", 720 ⁇ or more for attaining the same effect and end result. After opening up has taken place there remain knots or helical turns in the ribbons, the more the greater the twisting angle.
• the first ribbon and second ribbon have after joining been twist ⁇ ed 280° about their longitudinal direction in the junc ⁇ ture region, whereby after severing the juncture region the first ribbon and second ribbon are substantially parallel and side by side.
• the first ribbon and second ribbon have after joining been twist ⁇ ed 360" about their longitudinal direction in the junc ⁇ ture region, whereby after severing the juncture the first ribbon and second ribbon together form a chain- like loop.
• the warp fila ⁇ ments of the ' first ribbon and the warp filaments of the second ribbon are woven to run crossing each other, and intercalated, so that the warp filaments of the first ribbon change over to warp filaments of the second rib ⁇ bon. This is easy to accomplish when the ribbons are being manufactured by weaving.
• the means com ⁇ prises a link, advantageously a metal ring, which has been threaded to encircle the first ribbon and the sec ⁇ ond ribbon in the juncture region, whereby after the juncture region has become severed said link /rill con ⁇ nect the first ribbon and the second ribbon with each other.
• the first rib ⁇ bon an ⁇ the second ribbon are in the juncture region interconnected by weaving.
• the procedure of connecting the juncture region by weaving is particularly advan ⁇ tageous from the viewpoint of manufacturing taking place in the form of a continuous process and from that of positive, reliable and uniformly progressing opening up.
• the first rib ⁇ bon and the second ribbon are in the juncture region interconnected by stitching.,.
• the invention affords the advantage that with it is obtained a simple and reliably operating means which will become locked at the end.
• the means is particularly well suited to be manu ⁇ factured in a continuous process. It is furthermore an advantage of the inven ⁇ tion that the means is positive in action and reliable.
• the means is particularly appropriate to be used as a means to absorb the kinetic energy of a system for stopping an airplane or other vehicle.
• Figs 1, 2 and 3 present, schematically, a means of prior art
• Fig. 4 presents, schematically, an embodiment of the means of the invention, at the manufacturing stage
• FIG. 5 shows the means of Fig. 4, after the juncture region has been severed
• Fig. 6 presents, schematically, another embod ⁇ iment of the means of the invention, at the manufactur ⁇ ing stage,
• Fig. 7 shows the means of Fig. 6, after the juncture region has been severed
• Fig. 8 presents, schematically, a third embod ⁇ iment of the means of the invention, at the manufactur ⁇ ing stage
• Fig. 9 presents, schematically, a fourth em ⁇ bodiment of the means of the invention, at the manufa ⁇ - turing stage,
• Fig. 10 shows the means of Fig. 9, after the juncture region has been severed
• Fig. 11 presents, schematically and enlarged, the longitudinal section of the juncture region of a fifth embodiment of the means of the invention.
• Fig. 1 is seen the means of prior art at its manufacturing stage, to said means belonging a fi ⁇ rst ribbon 1 and a second ribbon 2, which have been joined to each other, advantageously by weaving, over a given distance in the longitudinal direction of the ribbons, in the juncture region 3, whereby the ribbons can be turn apart in order to absorb kinetic energy.
• part of each ribbon has been left unattached to the other so that traction mem ⁇ bers can be formed in the way shown in Fig. 2.
• the first end of either ribbon 1 and 2 is joined to the second end of the same ribbon, to form traction mem ⁇ bers.
• Fig. 4 the means of the invention is seen in its manufacturing stage, the first ribbon 1 and sec ⁇ ond ribbon 2 having been disposed so as to transmit loads after the juncture region 3 has opened up.
• the first ribbon 1 and second ribbon 2 have after joining been twisted 180" about their longitudinal direction, in the juncture region 3.
• the traction mem ⁇ bers may be formed in such a way that the ribbon end portions which have ended up on the same side are joined together and the means is assembled.
• the first ribbon 1 and second rib ⁇ bon 2 will be substantially parallel and located side by side.
• the means remains able to transmit a tensile load.
• the first ribbon 1 and second rib- bon 2 have after being joined been twisted 360° about their longitudinal direction in the juncture region 3.
• the first ribbon 1 and sec ⁇ ond ribbon 2 will together form a chain-like loop arrangement.
• the means remains able to transmit a ten ⁇ sile load.
• the warp filaments of the first ribbon 1 and the warp filaments of the second ribbon 2 are woven so as to be intercalated and crossing each other in such manner that the warp filaments of the first ribbon 1 change into the warp filaments of the second ribbon 2. Subsequent to severing the juncture region 3, the crossing warps will keep the first ribbon 1 and second ribbon 2 in conjunction with each other in loadable manner.
• the means comprises a link 4, which is for instance a metal ring, threaded to encircle the first ribbon 1 and the second ribbon 2 in the juncture region 3, whereby after the juncture region has been severed said link 4 will interconnect the first and second ribbons, as shown in Fig. 10.
• a link 4 which is for instance a metal ring, threaded to encircle the first ribbon 1 and the second ribbon 2 in the juncture region 3, whereby after the juncture region has been severed said link 4 will interconnect the first and second ribbons, as shown in Fig. 10.
• Fig. 11 displays, on a larger scale, a longi- tudinal section through part of the juncture region 3 of the means, where the first ribbon 1 and second rib ⁇ bon 2 have been joined by weaving in the juncture region 3.
• the juncture is created by longitudinal breaking warp filaments 5 which join the ribbons 1 and 2 together.
• the means of the invention may be used, for instance, as braking elements in an airplane arresting system on an airfield, where the length of the separat- ing juncture region mat be tens of metres.
• a series of consecutive means of the invention is connected between an arresting net and a fixed support.
• the means which is in action last of all may advantageously be an open- ing means of prior art requiring an opening force high ⁇ er than that of the plurality of means according to the invention.
• These means of the invention will open up in succession and transmit a load on the means which fol ⁇ low after, on separation of their juncture regions. It is possible, for instance to compose of a plurality of means according to the invention a highly efficient aircraft arresting system.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Aviation & Aerospace Engineering (AREA)
• Health & Medical Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Business, Economics & Management (AREA)
• Emergency Management (AREA)
• Woven Fabrics (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8528866

Family Applications (1)

Country Status (3)

Cited By (3)

Citations (6)

• 1989
  • 1989-08-18 FI FI893910A patent/FI82008C/fi not_active IP Right Cessation
• 1990
  • 1990-08-17 WO PCT/FI1990/000199 patent/WO1991002563A1/en unknown
  • 1990-08-17 AU AU61511/90A patent/AU6151190A/en not_active Abandoned

Patent Citations (6)

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