US3226053A - Means for dispensing and locking a safety strap - Google Patents

Means for dispensing and locking a safety strap Download PDF

Info

Publication number
US3226053A
US3226053A US316031A US31603163A US3226053A US 3226053 A US3226053 A US 3226053A US 316031 A US316031 A US 316031A US 31603163 A US31603163 A US 31603163A US 3226053 A US3226053 A US 3226053A
Authority
US
United States
Prior art keywords
pawl
shaft
teeth
dispensing
locking
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US316031A
Other languages
English (en)
Inventor
Petty John William Ledward
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Norris Brothers Ltd
Original Assignee
Norris Bros Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB3899962A external-priority patent/GB1068344A/en
Application filed by Norris Bros Ltd filed Critical Norris Bros Ltd
Application granted granted Critical
Publication of US3226053A publication Critical patent/US3226053A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/36—Belt retractors, e.g. reels self-locking in an emergency
    • B60R22/405—Belt retractors, e.g. reels self-locking in an emergency responsive to belt movement and vehicle movement

Definitions

  • This invention is for improvements in or relating to the mounting upon any type of vehicle means for dispensing and locking a safety strap.
  • the main object of the present invention is to produce means to be associated with seat safety straps or harness and dispensing means therefor whereby said straps or harness become locked irrespective of the behaviour of the occupants of the seats who are wearing said straps or harness. It is an inherent weakness of a great number of so-called locking devices that said devices only become effective to lock the strap when the wearer is thrown violently forwards.
  • Other safety straps or harness do not incorporate any form of strap-dispensing device (which at least permit complete or partial freedom of movement provided such movement is gradual and not suddent) and such safety straps or harness are objectionable in that they severely restrict the wearer.
  • FIGURE 1 illustrates diagrammatically in side elevation and partly in section one embodiment of the present invention
  • FIGURE 2 illustrates a section along the line IIII of FIGURE 1;
  • FIGURE 3 is a plan view of an alternative embodiment of the present invention with the top half of a twopart cover removed and with the safety strap fully extended;
  • FIGURE 4 is a section along the line IV-IV of FIG- URE 3;
  • FIGURE 5 is a section along the line V-V of FIG- URE 3;
  • FIGURE 6 is a section along the line VI-VI of FIG- URE 3;
  • FIGURE 7 is a section along the line VII-VII of FIGURE 3;
  • FIGURE 8 is a section along the line VIIIVIII of FIGURE 3;
  • FIGURE 9 is a view similar to that of FIGURE 6, but showing vertical mounting of the apparatus with the bobweight having through the tappet caused the pawl to engage the ratchet teeth;
  • FIGURE 10 is a view of cap 58 after removal from the remainder of the apparatus and seen looking in the direction of the arrow C in FIG. 1, without any of the parts mounted on spindle 53.
  • FIGURES 1 and 2 there is shown a rotatable means or drum 40 upon which a safety belt is adapted to be Wound, said drum being mounted for rotation in a casing 41 which encloses a space 42 in which a reeledup safety belt is housed. Said casing 41 would be provided with a slot (not illustrated) through which the belt would extend for manipulation by the wearer.
  • a disc or collar 43 is fixed to the drum 40 and carries three pawls 44 (FIGURE 2) each of which is mounted thereon for rocking movement about an axis C (see FIGURE 1) and each of which is formed with a follower 45.
  • the drum 40 is formed with three circumferential slots through which the various followers 45 extend.
  • annulus of ratchet teeth 47 In radial alignment with the set of pawls 44 is an annulus of ratchet teeth 47 of which only some have been illustrated in FIGURE 6, it being understood that there is a continuous succession of such teeth. Said teeth 47 are illustrated as having been formed in the casing 41 itself but there are obviously numerous other ways of achieving the same result.
  • a cam consisting of a right circular conical head 48 and a stem 49 is mounted in a bearing 50, the flanges of which are securable to an end face of the casing 41 by means of screws 51. It is the head 48 and the stem 49 which have been omitted for the sake of clarity in FIG- URE 2. Against that end of the stem 49 which protrudes from the casing 41 there is arranged a bell crank lever 52 which takes the form of a triangular plate which is mounted for rocking movement about the axis of a spindle 53 mounted in bosses F and E formed on cap 58, the edge 54 of the triangle illustrated being normal to the edge 55.
  • a freely suspended bob-weight 56 is supported by a plate 57 which is capable of adjustment about the axis of the spindle 53 by conventional means not shown, the ends of which are carried by or supported upon a cap 58 which is rotatable about the axis D about which the drum 40 rotates.
  • Cap 58 is secured to casing 41 by radially inwardly projecting ridge A formed in the cap 58 to mate with a groove formed in an axially extending element B formed in the casing 41.
  • Each of the pawls is lightly spring-biassed in such a manner as to tend to return to the positions thereof illusv trated in FIGURE 2, as by a spring 59 anchored at one end to the follower 45 and at the other end to a stud 60 on the disc 43. This will prevent engagement of the pawls 44 with the teeth 47 under the action of centrifugal force.
  • the cap 58 and, therefore, the attitude of the spindle 53 has been made adjustable because the axis D may be kept horizontal but the casing as a whole may need to be rotated about said axis D before being fixed to the vehicle (for example if the slot through which the belt extends is desired to face the front of the vehicle rather than the roof thereof). Subsequent adjustment of the cap, which could have a line or arrow painted thereon normal to the axis of the spindle 53, will ensure that it will be readily seen whether or not the bob-weight 56 is properly freely suspended.
  • FIGURES 3 to 9 there is illustrated an inner belt tube 70 (FIGURE 4) which is inserted into a sewn loop 71 formed at one end of a safety belt or strap 72.
  • An outer belt tube 73 is slipped around the loop 71 within which is the tube 70, the strap 72 extending through an axially extending slot 74 (FIGURES 6 and 8). This serves to anchor the safety belt to the apparatus.
  • One end of the tube 73 is formed with a pair of axially extending notches 75, 76 (FIGURE 6).
  • the tongues of metal which between them define these notches 1 and the slot 74 serve to connect the tube 73 drivingly to a wheel 77 having formed therein a plurality of ratchet teeth 78.
  • a bush 79 in the centre bore of the wheel 77 encircles a shaft 80 which extends through the tube 70.
  • a second bush 81 is inserted into the other end of the tube 73, and said other end of tube 73 has a portion 82 thereof which serves as an anchorage and which is formed by radially outward deformation of a part of said other end.
  • notch 83 (FIGURE 7) extending axially from said other end.
  • One hooked end 84 of a coil spring 85 is inserted in the notch 83 and engages the anchorage 82 whilst the other end of said spring is wrapped around a shaft 86 whichis parallel to the shaft 80.
  • a bob-weight support indicated generally by 89 consists of a one-piece moulding (in nylon preferably) with an arm 90 in which there is a hole 91 through which there extends the neck 92 of a bob weight 93 having a substantially hemispherical head 94 and a mass 95 (FIGURE 6).
  • the support 89 is preferably made of a tough natural or synthetic resin material because the intention is for said support to be keyed to the shaft 86 by reason of the splines 87 digging into said material as the sleeve part of said support 89 is rammed along the shaft.
  • the bob weight 93 is suspended freely from the arm 90.
  • a pawl-and-tappet assembly Adjacent the support 89 is a pawl-and-tappet assembly which consists of a pawl 96 (FIGURES and 9) secured to a bush 97 and of a one-piece tappet 98 and sleeve 99, a bolt 100 being adapted to engage screw threads formed in said tappet 98 and in a tail portion 101 of said sleeve 99 so as to tighten said sleeve on to said bush 97.
  • the radially outer surface of the bush 97 and the radially inner surface of the sleeve 99 are preferably lightly grooved or scored so as to provide mating surfaces which will bind or bite together all the more strongly.
  • the tappet 98 rests upon the flat top of the substantially hemispherical head 94 of the bob weight 93. If the mass 95 were to move in an arc in any direction (for example towards the viewer out of the plane of the sheet of paper) a portion of the rim of the flat top of the hemispherical head 94 will move to a higher point than that occupied by that portion or any other portion of said rim.
  • the ends of the shafts 80 and 86 extend through apertures formed in link plates 102 and 103 located at opposite sides of the apparatus (FIGURES 3, 5 and 6). Said link plates 102, 103 together with the spaced limbs 104 and 105 of a mounting bracket 106, through which limbs said shafts also extend as can be seen in FIGURE 5 for example, not only ensure that shaft spacing but also the weight of the pieces of apparatus described above are maintained and supported, respectively, by components strong enough to do so and not by either half of a two-part dust cover indicated generally by 107.
  • a thick plate 108 is located between the two limbs 104, 105 for the purpose of stiffening this part of the apparatus and said plate 108 and the bracket are bored to receive the shank of a bolt 109 by means of which the bracket 106 is secured to the floor, door pillar, parcel shelf or the like of the vehicle.
  • the bracket 106 is also bored at 110 and the plate 108 is likewise bored and threaded as at 111 (or provided with captive nuts as an alternative) to cater for screws (not illustrated) being screwed upwardly through the car floor into engagement with said screw threads 111.
  • the shafts 80, 86 are secured at their ends by washers 112 and screws or bolts 113 the threaded shanks of which extend into threaded axial bores formed in the ends of the shafts (see FIGURE 4 for example).
  • the dust cover 107 is preferably formed, as stated above, in two parts. Referring to FIGURES 5 and 7, an upper part 114 and a lower part 115 are illustrated therein, the line along which the two parts meet or are in contact with one another being coincident with the axis of the shaft 86 in FIGURE 5 and with the line joining the axes of the shafts 86 and in FIGURE 7. Each part 114, 115 is so shaped as to define a rectangular cavity 116 (FIGURE 3) in which is housed the shaft 86 and the major portion of the pawl and tappet assembly descirbed above.
  • each part 114, 115 is so shaped as to define two spaced cavities 117 and 118, the ratchet wheel 77 being housed in the cavity 117 and the coil spring being housed in the cavity 118.
  • the safety belt or strap 72 is wound up on the springbiassed shaft 80 and is located between the parts of the dust cover which define said cavities 117, 118 and is not housed within the dust cover (see FIGURES 3, 4 and 7).
  • the upper part 114 is connected to the lower part 115 after the apparatus has been assembled and adjusted (as hereinafter explained) to suit the users requirements in the following manner.
  • the lower part 115 is made with a screw-receiving boss 119 (FIGURES 3 and 8) which is provided with a bore 120.
  • the upper part 114 is made with a similar screw-receiving boss 121 which is provided with a bore 122 of the same diameter as that of the bore 120 and with a bore 123 of larger diameter than that of the bore 122, the bores 122 and 123 being axially aligned and connected with one another.
  • a self-tapping screw 124 is screwed into the aligned bores 120, 122 (the preferred material from which the two parts 114, 115 of the dust cover are made being polystyrene), the head of said screw 124 being accommodated within the confines of the bore 123 (FIGURE 8).
  • the bob-weight support 89 is rammed along the shaft 86 so as to engage positively with the splines 87 in such a manner that the arm of said support 89 will be horizontally disposed when the whole apparatus is mounted in the vehicle. This is essential since the bob weight 93 must be freely suspended.
  • FIGURES 6 and 7 it will be seen that the apparatus is mounted horizontally (that is, with the line joining the axes of the shafts 86 and 80 horizontal) and that the bob weight is freely suspended.
  • FIGURE 9 the apparatus is mounted vertically (that is, with the line joining said shaft axes vertical) and the bob weight 93 has been drawn in a displaced condition to illustrate engagement of the pawl with a ratchet tooth. It will, however, be obvious that in a rest condition the bob weight 93 would be freely suspended.
  • Intermediate mounting positions of the apparatus can also be effected with appropriate adjustments as hereinbefore explained since the relative positions of the pawl 96 and the tappet 98 are infinitely adjustable as also are the relative positions of the shaft 86 and the bob weight support 89.
  • the mechanism transmits only a pilot signal or instruction to the pawl 96. Once said signal is such as to cause engagement of the pawl tip of the ratchet tooth, any pull exerted on the safety belt 72 will cause the pawl to engage said tooth fully, thereby moving into a position such as has been illustrated in FIGURE 9.
  • the head 94 of the bob weight is effectively, a cam which acts on the tappet 98.
  • the flat top to said head is not a critical feature of the invention.
  • Said head may have for example a conical top, the tappet 98 resting on the apex of the cone. In such a case, any movement of the freely suspended bob weight out of its vertical rest condition would cause the tappet 98 to drop and the pawl 96 would engage a ratchet tooth and, therefore, the various parts of the apparatus would merely need to be disposed in alternative positions relative to the ratchet wheel 77 to be effective.
  • An apparatus for dispensing and locking a safety belt comprising a frame, first and second spaced parallel shafts mounted in said frame, a rotatable drum mounted on said first shaft upon which said safety belt is adapted to be mounted, a plurality of ratchet teeth mounted on one end of said drum, pawl means pivotally mounted on the second shaft operable to engage said teeth but normally disengaged therefrom, means for adjusting the position of the pawl means relative to the teeth, actuating means operating said pawl means, said actuating means including an inertia operated weight, arm means mounted on said second shaft normally substantially vertically suspending said weight for pivotal movement, said weight moving by inertia to operatively engage and pivot the pawl means into engagement with said ratchet teeth, and means for securing said frame in operative position on a base.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Basic Packing Technique (AREA)
US316031A 1962-10-15 1963-10-14 Means for dispensing and locking a safety strap Expired - Lifetime US3226053A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3899962A GB1068344A (en) 1962-10-15 1962-10-15 Improvements in or relating to the mounting upon any type of vehicle means for dispensing and locking a safety strap
GB1987263 1963-05-18

Publications (1)

Publication Number Publication Date
US3226053A true US3226053A (en) 1965-12-28

Family

ID=26254299

Family Applications (1)

Application Number Title Priority Date Filing Date
US316031A Expired - Lifetime US3226053A (en) 1962-10-15 1963-10-14 Means for dispensing and locking a safety strap

Country Status (6)

Country Link
US (1) US3226053A (fr)
BE (1) BE638603A (fr)
CH (1) CH429472A (fr)
DE (1) DE1959038U (fr)
ES (1) ES292505A1 (fr)
NL (1) NL299254A (fr)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3343765A (en) * 1965-11-19 1967-09-26 Gen Motors Corp Seat belt retractor
US3430891A (en) * 1966-05-04 1969-03-04 Britax London Ltd Automatic locking mechanism for a safety belt or harness
US3489367A (en) * 1967-11-17 1970-01-13 Firestone Tire & Rubber Co Emergency locking retractor
FR2014310A1 (fr) * 1968-06-27 1970-04-17 Kangol Magnet Ltd
US3508720A (en) * 1967-03-21 1970-04-28 Kangol Magnet Ltd Safety belts
US3511450A (en) * 1968-03-11 1970-05-12 Kamal Y Aweimrine Inertia lock reel
US3521832A (en) * 1967-02-10 1970-07-28 Autoindustri Ab Automatic locking device for safety belts
US3552676A (en) * 1968-03-01 1971-01-05 Georges Robert Weber Emergency locking rotractor for safety belt
FR2210159A5 (fr) * 1972-12-06 1974-07-05 Technar Inc
JPS4988225A (fr) * 1972-12-18 1974-08-23
US3831878A (en) * 1973-05-21 1974-08-27 Gen Motors Corp Restraint belt retractor
US3841581A (en) * 1973-05-21 1974-10-15 Gen Motors Corp Locking mechanism for a vehicle body restraint belt retractor
JPS49124725A (fr) * 1972-08-09 1974-11-29 Autoindustri Ab
US3858824A (en) * 1973-03-27 1975-01-07 Allied Chem Dual action safety seat belt retractor
US3901461A (en) * 1974-07-10 1975-08-26 Allied Chem Vehicle sensitive retractor with improved universal inertia mechanism
US3912192A (en) * 1973-05-25 1975-10-14 Ml Aviation Co Ltd Restraining device
US3944162A (en) * 1973-04-20 1976-03-16 American Safety Equipment Corporation Reel for storing belts or the like
US4018399A (en) * 1972-08-09 1977-04-19 Autoindustri Ab Automatic locking device for a vehicle safety belt
DE2750311A1 (de) * 1976-11-11 1978-05-18 Allied Chem Reibgedaempfter pendelsensor
US5524833A (en) * 1993-10-04 1996-06-11 Trw Repa Gmbh Seat belt retractor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2650655A (en) * 1950-11-13 1953-09-01 American Seating Co Multidirectional inertia-operated safety device for vehicle chairs
US2708555A (en) * 1952-06-30 1955-05-17 Douglas Aircraft Co Inc Inertia reel
US2708966A (en) * 1951-10-20 1955-05-24 American Seating Co Inertia-operated safety equipment
US2825581A (en) * 1956-06-29 1958-03-04 Gilbert L Knight Safety shoulder and lap belt device for motor vehicle passengers
US2923492A (en) * 1956-05-14 1960-02-02 Douglas Aircraft Co Inc Inertia reel

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2650655A (en) * 1950-11-13 1953-09-01 American Seating Co Multidirectional inertia-operated safety device for vehicle chairs
US2708966A (en) * 1951-10-20 1955-05-24 American Seating Co Inertia-operated safety equipment
US2708555A (en) * 1952-06-30 1955-05-17 Douglas Aircraft Co Inc Inertia reel
US2923492A (en) * 1956-05-14 1960-02-02 Douglas Aircraft Co Inc Inertia reel
US2825581A (en) * 1956-06-29 1958-03-04 Gilbert L Knight Safety shoulder and lap belt device for motor vehicle passengers

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3343765A (en) * 1965-11-19 1967-09-26 Gen Motors Corp Seat belt retractor
US3430891A (en) * 1966-05-04 1969-03-04 Britax London Ltd Automatic locking mechanism for a safety belt or harness
US3521832A (en) * 1967-02-10 1970-07-28 Autoindustri Ab Automatic locking device for safety belts
US3508720A (en) * 1967-03-21 1970-04-28 Kangol Magnet Ltd Safety belts
US3489367A (en) * 1967-11-17 1970-01-13 Firestone Tire & Rubber Co Emergency locking retractor
US3552676A (en) * 1968-03-01 1971-01-05 Georges Robert Weber Emergency locking rotractor for safety belt
US3511450A (en) * 1968-03-11 1970-05-12 Kamal Y Aweimrine Inertia lock reel
FR2014310A1 (fr) * 1968-06-27 1970-04-17 Kangol Magnet Ltd
US3578260A (en) * 1968-06-27 1971-05-11 Kangel Magnet Ltd Inertia reel mechanisms
JPS49124725A (fr) * 1972-08-09 1974-11-29 Autoindustri Ab
US4018399A (en) * 1972-08-09 1977-04-19 Autoindustri Ab Automatic locking device for a vehicle safety belt
FR2210159A5 (fr) * 1972-12-06 1974-07-05 Technar Inc
US3838831A (en) * 1972-12-06 1974-10-01 Technar Inc Vehicle sensitive retractor
JPS4988225A (fr) * 1972-12-18 1974-08-23
US3858824A (en) * 1973-03-27 1975-01-07 Allied Chem Dual action safety seat belt retractor
US3944162A (en) * 1973-04-20 1976-03-16 American Safety Equipment Corporation Reel for storing belts or the like
US3841581A (en) * 1973-05-21 1974-10-15 Gen Motors Corp Locking mechanism for a vehicle body restraint belt retractor
US3831878A (en) * 1973-05-21 1974-08-27 Gen Motors Corp Restraint belt retractor
US3912192A (en) * 1973-05-25 1975-10-14 Ml Aviation Co Ltd Restraining device
US3901461A (en) * 1974-07-10 1975-08-26 Allied Chem Vehicle sensitive retractor with improved universal inertia mechanism
DE2750311A1 (de) * 1976-11-11 1978-05-18 Allied Chem Reibgedaempfter pendelsensor
US5524833A (en) * 1993-10-04 1996-06-11 Trw Repa Gmbh Seat belt retractor

Also Published As

Publication number Publication date
NL299254A (fr)
ES292505A1 (es) 1964-01-16
DE1959038U (de) 1967-04-20
CH429472A (de) 1967-01-31
BE638603A (fr) 1964-02-03

Similar Documents

Publication Publication Date Title
US3226053A (en) Means for dispensing and locking a safety strap
US3991953A (en) Automatic locking safety belt retractor
CA1057263A (fr) Rappel independant a coches sans embrayage
US4323205A (en) Safety seat-belt retractor
US4322046A (en) Seat belt retractor
US4948066A (en) Retractor for seat belts
US3901459A (en) Safety belt retractor locking device
US3237729A (en) Inertia operated mechanism
US4018399A (en) Automatic locking device for a vehicle safety belt
US4817885A (en) Automatic-emergency locking retractor for seat belts
US3944162A (en) Reel for storing belts or the like
JPH03551A (ja) 安全ベルト巻取り装置
US4456195A (en) Emergency locking vehicle safety belt retractor
US3508720A (en) Safety belts
US4395003A (en) Device for suspending under aircraft miscellaneous loads with variable distance between centers
US3010544A (en) Automatic vehicle drum brake adjustor
EP3044042B1 (fr) Retractor avec capteur de véhicule monté sur cardan
US4726541A (en) Emergency locking retractor
SE453816B (sv) Lasmekanism for en upplindningsanordning for band
US3568948A (en) Dual function seat belt retractor
US4351545A (en) Strop restraining means
US4244537A (en) Adjustable sensor responsive to vehicle acceleration
US4101093A (en) Friction dampened pendulum sensor
US3999723A (en) Automatic locking retractor with lock-up delay
EP0543520B1 (fr) Rétracteur de ceinture de sécurité comportant un mécanisme de suppression de cliquetis