US2870772A

US2870772A - Hair curlers

Info

Publication number: US2870772A
Application number: US395420A
Authority: US
Inventors: Samuel F Cole
Original assignee: Individual
Current assignee: Individual
Priority date: 1953-12-01
Filing date: 1953-12-01
Publication date: 1959-01-27
Anticipated expiration: 1976-01-27

Description

Jan. 27, 1959 s. r-zboLE HAIR CURLERS F iled Dec. 1, 1955 FIG. A

FIG. 6

FIG. 8

FIG.7

United States Patent 2,870,712 HAIR URLERS Samuel F. Cole, Washington, D. (3.

Application December 1, 1953, Serial No. 395,420 11 Claims. (Cl. 132-41) This invention relates to hair-curlers and, more spe cifically, to devices of this character which are especially adapted for personal use in connection with the so-called home permanents. The invention is also adapted for professional use and is characaterized by a rotatable hairwinding member, a bifurcated support for the hair-winding member, a hair-clamping bail employing novel hinging means, longitudinally operable means for simultaneously securing and/or releasing the bail and the hairwinding member, and eccentrically operable means for automatically securing the hair-winding member against the accidental unwinding thereof.

The objects of this invention are:

To provide a hair-curler for either home or professional use which will be convenient and rapid to operate; to provide a hair-curler having means whereby the support for the hair-winding member is held in operating position simultaneously with the rotation of the hair-winding member; to provide a hair-curler wherein the hair-winch ing member is automatically secured against accidental reverse rotation and the resulting unwinding; to provide a hair-curler wherein the hair-winding member may be easily locked and/or released in close contact with the scalp; and to provide a hair-curler which is susceptible of fabrication from either plastic or metal. Other objects will become apparent upon the following full disclosure of my invention.

in the drawings, wherein similar reference characters indicate corresponding parts throughout the several views:

Figure 1 is a plan, view of the hair-curler, the hairwinding member being shown in the free or unlocked position, and the bail disengaged and partly open, the extreme open position of the bail being indicated in broken lines.

Figure 2 is a central longitudinal horizontal sectional view of the construction shown in Figure 1, the parts being shown in the closed position. r

Figure 3 is a transverse section on line 33 of Figure 2.

Figure 4 is a transverse section on line 44 of Figure 2.

Figure 5 is a transverse section on line 5-5 of Figure 2.

Figure 6 is a fragmental side elevational view of a portion of the structure shown in Figure 1, a part being in section to show a modification.

Figure 7 is a transverse section on the line 7-7 of Figure 9.

Figure 8 is a transverse section on the line 88 of Figure 9 Figure 9 is a fragmental view, largely in section, corresponding in part to Figure 2, but showing modifications.

Referring to the drawings, the numeral 1 denotes a rotatable hair-winding member upon which the tresses are wound for curling. (Hereinafter, the term hairwinding member is replaced with the term mandrel which is used to denote a winding member, a spool, or the equivalent.) The mandrel-ends 1' and 1" are journaled in the bearings 2' and 3 respectively, the said bearings being formed in the annular members 4 and 5 which are hereinafter termed yoke arms 4 and 5. These yoke arms are integral with the longitudinal supporting bar 6 and, combined therewith, comprise, an elongated yoke coextensive with the mandrel, wherein the mandrel is supported, the mandrel being both rotatable and longitudinally slidable within the bearings.

Adjustments-of the mandrel are effected by means of the knurdled knobs 7 and 7, the inner faces of these knobs containing the annular grooves 8 and 8' respectively. These grooves form the

bosses

9 and 9 respectively which are concentric with their respective knobs, the latter being attached to the mandrel Within the cooperant recesses 10 and 10' in the mandrel ends 1' and 1 respectively. The width of the grooves 8 and 58' is sufficient to also accommodate therein the tapered annular flanges 11 and 11' respectively, these flanges forming longitudinal protuberances on the outer faces of the yoke arms 4 and 5.

The supporting bar 6 is coextensive with the mandrel and in spaced relation thereto, thus providing suitable clearance, indicated by the numeral 12, in which the rolled tresses may be acornmodated. Supporting bar 6 is formed with the

longitudinal prolongations

13 and 13 integral with the ends of the yoke and which comprise curler-supports. These supports are substantially coextensive with the knobs 'i and 7 respectively and their placement in close proximity to the knobs insures their interposition between the operators thumbs and forefingers during the adjustment of the mandrel-thus providing for the support of the curler.

As hereinbefore mentioned, the mandrel 1 is both longitudinally and rotatably adjustable for alining the cooperant members and for winding the tresses respectively. Thus, the longitudinal adjustment of the mandrel inwardly alines and locks the hereinafter described hairclamping bail 2t} and simultaneously engages the members of the following described mandrel-lock 14. The said lock comprises a mandrel control means formed in the cooperant surfaces of the mandrel and its bearing in one end of the hair-curler by means of which the accidental reverse rotation of the mandrel is automatically prevented during the Winding of the tresses. The longitudinal adjustment of the mandrel outwardly, however, releases the bail and simultaneously disengages the following described mandrel-stop 15, of the mandrel-lock 14, thereby freeing the mandrel from further operation of the automatic mandrel-lock for rotation in either direction as, for example, when the curled tresses are to be unwound from the mandrel.

The above defined mandrel-lock 14 is associated with the yoke-arm 5 and the mandrel-end 1" and comprises the. circumferential groove or ball-race 14 (Fig. 2) which is formed in the mandrel-end 1"; the cooperant groove 16 which is a recess formed within the bearing in the yoke-arm 5 eccentric to the race 14' (Figs. 2 and 5); and the floating mandrel-stop 15, the latter being a roll able stop adjustably confined between the cooperant cams 14" and 16'. Mandrel-stop 15 is spherical in contour and may be formed of any suitable material. Where a resilient mandrel-locking member is'required, rubber or its equivalent may be indicated.

The ball-race 14', and the eccentric groove 16 are of graduated or sloping depths to form the cams 14" and 16' respectively.

The depth of the circumferential race 14 is greater on one side than on the other, thus imparting a transverse incline to the bottom of the said race resulting in the formation of the cam 14" by means of which the stop 15 is propelled from the ball-race 14' into the groove 16 in response to the inward slidable adjustment of the mandrel.

ment of the mandrel-stop 15 within the groove 16; and secondly, in the forcing of the stop 15 into simultaneous frictional engagement with the coacting earns 14 and 16' in automatic response to the reverse rotation of the mandrel.

Mandrel 1 is preferably tapered between its journaled ends as indicated by the numeral 17, the said taper extending from its flared outer ends inwardly to the center of the mandrel, thus augmenting the clearance for the tresses hereinbefore described in connection-with the supporting bar 6. The mandrel is also formed with the,

longitudinal corrugations 18 which are coextensive with the taper 17, and which provide ventilation for the hair which may be wound upon the mandrel.

One side of the mandrel is formed with the longitudinal flat 19 which cooperates with the correspondingly contoured hinged-bail, or hair-clamp, 20 to fasten the ends of the tresses to the mandrel as a preliminary to the operation of the curler, the bail being hinged to the mandrel at one end of the hair-curler. The flat 19 forms a longitudinal seat coextensive with the'corrugations 18 and includes provisions for the hereinafter described bailhinge and dual bail-mandrel fastener (Figs. 1,2, and 3).

The hinging of bail 20 involves the use of a novel balland-fin combination (Figs. 2 and 4) whereby the bail is permanently anchored to the mandrel, at one end thereof, and its movement limited to an outward swing. This hinge comprises in part a thin sectoral fin 21 for stabilizing the bail, the said fin being formed on the hinged end of the bail 20 and housed within the narrow correspondingly shaped recess 22 in the mandrel and, in part, a slotted ball-shaped bail-bearing 23, the bearing being pivotally confined within the cooperant concavity 24 (hereinafter termed bearing-seat 24), the concavity being located in the inner end of the bore 25 in mandrel 1. The recess 22 extends longitudinally inward from the surface of the mandrel, in line with the fin 21 and into the bore 25, providing a support for the fin 21 during its outward swing. The bore 25 extends transversely through the mandrel to intersect the fiat bail-seat 19 at the juncture of the fin 21 with the bail 20. The bearing 23 is formed with the slot 26 (Fig. 4) and projects through seat 24, the extent of the protrudent portion 23' being equal to the depth of the slot 26 in the said bearing. The adjacent under edge 21 of the fin 21 is firmly attached within the slot 26, as by cementing, to the bearing 23, thus forming a unitary bail which issecure against displacement. A closure member in the form of the plug 27 is provided for the bore 25, the plug being recessed as indicated by the numeral 28 to accommodate the fin 21 when it is in extended position.

The inner periphery of bearing 2, in the yoke-arm 4 at the opposite end of the hair-curler, is formed with the combined annular head 29 and the paralleling annular groove 30 (Fig. 2), the latter being formed in the bearing 2 interiorly of the former, the combined formations comprising an annular keeper having a revertant cross-section for engagement by the bail-fastener 31, the lath?! being 4 i an enlargement in the form of a rounded protrusion integral with the free end of bail 20 and adapted for engagement with the said annular keeper and to coact therewith in a dual capacity to simultaneously secure the free end of the bail and the mandrel against accidental longitudinal movement, the fastener. 31 being responsive to the longitudinal adjustment of mandrel 1 for its engagement with, and/or its release from, the groove 30. In the engagement of the fastener 31 with the groove 30, the fastener is first depressed in its passage over the bead 29-thus necessitating the adequate clearance which is provided by the cooperant recess 32 (Figs. 2 and 3) in the mandrel 1.

The operation of the embodiment of the invention thus far described is as follows:

During the rotation of the mandrel, the curler is held with the edge of the supporting bar 6 toward the operator. The mandrel is first adjusted longitudinally outward to simultaneously disengage both the mandrel-stop 15 and the bail-fastener 31-the former from the cam 16' and the latter from the keeper 2930. With the mandrel in this position, it may be freely rotated in either direction and the bail 20 may be opened to admit the ends of the tresses which are to be curled, the said end of the tresses being inserted between the flat of mandrel 1 andthe bail 20.

After the tresses have been clamped in the curler, the bail 20 is fastened by the inward longitudinal adjustment of the mandrel, the said adjustment being accompanied by the simultaneous transverse adjustment of the circumferential race 14 with reference to the eccentric groove 16 and to the stop 15, whereby the stop is brought into frictional contact with the cams 14 and 16. When thus engaged, the stop 15 functions automatically in response to the direction of the rotation of the mandrel--either by frictionally engaging the cams 14 and 16 to prevent the reverse rotation of the mandrel or by releasing the mandrel for forward and/or reverse rotation. Thereupon, and until any given winding operation is completed, the mandrel may be freely rotated to wind the tresses, constantly insured against accidental reverse rotation by the action of the cams 14" and 16', within the race 14' and within the groove 16 respectively, which automatically wedge the stop 15 between the opposed surfaces of the said race and the groove to effectively fastenor retard the mandrel.

The release of the mandrel-stop 15 is automatically effected by the longitudinal adjustment of the mandrel outwardlyresulting either in the compression of the stop, when it is composed of a yielding material such as rubber, orWhen it is composed of a more rigid material, by its displacement in the direction of its releasement, this displacement being induced through the cooperation of the coacting members.

The tresses may be wound as tightly as desired and the winding operation may be interrupted without loosening the partly wound tresses. The curls may be released from the mandrel by its longtudinal adjustment as indicated above, whereby the stop 15 is releasedfrom frictional engagement with cam 16'.

Figure 6 illustrates a modification of Figure 1 which is especially adapted for professional use where continuous employment is common practice. This embodiment of the invention may advantageously employ metal in its construction and differs from the preceding curler only in that a resilient mandrel-stop is employed to insure positive frictional engagement of the cooperant members.

This is accomplished by employing the modified yokearm 33 wherein the eccentric race 34 contains the seat 35 for the coiled resilient member 36. The free end of the resilient member 36 contains the bearing member 37 which engages the ball-shaped stop 38, maintaining the latter in contact with the mandrel.

The operation of this embodiment is identical with that of Figure 1.

Figures 7 to 9 inclusive illustrate a modification of Figure 1 wherein a plurality of eccentric grooves, and a corresponding plurality of rollable stops 40, are employed to insure greater sensitivity in the operation of the curler. In the modification here presented, the position of the eccentric grooves 39 and the circumferential race .40 is reversed with reference to the positions occupied .by their counterparts in Figure 2, The longitudinal axes of the presently considered eccentric grooves 39 are circumferentially alined in spaced relation in the surface of the mandrel-end 41, with the direction of their angularity reversed, as above stated. Likewise, the direction of the angularity of the circumferential race 42, which is formed within the yoke-arm 43, is correspondingly reversed, the greater depth of race 42 being at its outer end, the race and grooves shown in the mandrel and in the yoke-arm respectively of Figure l are here formed in the yoke-arm and in the mandrel respectively.

The spherical bail-bearing 23, of Figure 2, is here replaced by the disc 44 which is pivotally confined within the cooperant concavity 45, the latter being situated in the inner end of the bore 46 which extends transversely through the mandrel. The lower edge 47 of the fin 47, at the hinged end of the bail 48, is attached to the disc within the notch 49 in the lower edge thereof, the fin being operable within the sectoral recess 56 in the mandrel d ll. The bore as contains the slotted closuremember 51, similar to plug 27, Figure 2. The remaining members of the device are identical with their counterparts in the first disclosed embodiment.

The operation of this modification corresponds to that of the first embodiment. The cam-like action of the eccentric grooves of each embodiment, in combination with the similar action of the circumferential races, depends ultimately upon the contours of the cams of these coacting members, and are subject to such modifications as may be indicated.

The foregoing disclosures are not to be considered as limitations upon the inventive thought which forms the basis of this application, but merely as illustrative of the principles involved. Numerous adaptations and modifications of the structures disclosed are possible without departing from the spirit of my invention and I claim all such adaptations modifications which fall within the scope of the appended claims.

Having thus disclosed my invention, I claim:

1. A hair-curler comprising in combination a slidable hair-winding member adapted for forward and reverse rotation, 21 support for the hair-winding member coextensive therewith, a piurality of grooves of graduated depths in one end of the hair-curler, one of the said grooves having the form of a circumferent race concentric with the hair-winding member, the other of the said grooves being a recess eccentric to the circumferent race, a spherical stop for the hair-winding member confined between the circumferent race and the eccentric recess, the said graduated depths of the grooves forming cams for aligning the stop in response to the sliding adjustment of the hair-winding member and for frictional engagement of the stop with the coacting grooves in response to the reverse rotation of the hair-winding member, a bail hinged to the hair-winding member, a fastener for the bail and for the hair-winding member in the support at the opposite end of the hair-curler, the bail and the spherical stop being simultaneously controlled by the longitudinal adjustment of the hair-winding member.

2. A hair-curler comprising in combination a slidable mandrel rotatably mounted for hair Winding and unwinding, a support for the mandrel in spaced relation therewith,- a mandrel-lock formed on one end of the haircurler and comprising a groove of graduated depth in the mandrel, a cooperant groove of graduated depth. in the support, cams formed within the grooves by the graduated depths thereof, and a mandrel-stop adjustably confined between the cams, the stop being responsive to the sliding adjustment of the mandrel for adjustment within the grooves, and automatically responsive to the unwinding of the mandrel for simultaneous frictional engagement with the grooves, a hair-clamping bail hinged to the mandrel, a fastener integral with the free end of the bail and adapted for engagement with the said support to secure the bail and the mandrel against longitudinal displacement, and a keeper for the fastener formed in the support on the opposite end of the hair-curler, the engagement of the fastener being controlled by the longitudinal adjustment of the mandrel.

3. A hair-curler comprising in combination a yoke, mandrel bearings in the arms of the yoke, a slidable man.- [drel rotatably mounted in the bearings and adapted for hair winding and unwinding, a vvcircumferent: ball-race in one end of the mandrel, an arcuate groove in the cooperant mandrel bearing, the arcuate groove being eccentric tothe circumferent race, and a spherical stop for the mandrel confined between the ball-race and the groove, the said race and groove being of graduated depths for the actuation of the stop in accordance with the requirements thereof, the stop being adjustable within the arcuate groove in response to the slidable adjustment of the mandrel, and being in simultaneous frictional engagement with the ball-race and the groove in automatic response to the unwinding of the mandrel, a hair-clamping bail hinged to the mandrel at the said end of the hair-curler, a dual bail-mandrel fastener on the free end of the "bail, and a keeper for the fastener formed within. the bearing at the opposite end of the hair-curler.

4. A hair-curler comprising in combination a yoke having mandrel bearings in the ends thereof, a slidable mandrel mounted in the said bearings, a plurality of spaced recesses in the end of the mandrel at one end of the hair-curler, a circumferential groove in the CO? operant mandrel bearing," the recesses being circumferentially disposed in alinement with the circumferential groove, the bottoms of the spaced recessesbeing eccentric to the circumferential groove, a plurality of rollable mandrel-stops, one of the said stops being confined between each recess and the coacting circumferential groove, the spaced recesses and the circumferential groove being of graduated depths to form cams for actuating the stops, the stops being responsive to the sliding adjustment of themandrel for alinement within the respective spaced recesses and to the reverse rotation of the mandrel for automatic frictional engagement therewith, a unitary hair-clamping bail hinged to the mandrel at the said end of the hair-curler, a fastener for the bail and the mandrel integral with the free end of the bail, and a bail keeper in the mandrel bearing in the opposite end of the hair-curler.

5. A hair-curler comprising incombination an elongated yoke having mandrel bearings in the ends thereof, a sliding mandrel journaled within the said bearings and adapted for forward and reverse rotation, a circumferent groove within the mandrel hearing at one end of the hair-curler, a plurality of spaced recesses in the cooperant journaled end of the mandrel, the bottoms of the said recesses being eccentric to the circumferent groove, a corresponding plurality of floating mandrel-stops oper: able between the circumferential groove and the spaced recesses, the said stops being responsive to the slidable adjustment of the mandrel for their adjustment within the spaced recesses and automatically responsive to the reverse rotation of the mandrel for simultaneous frictional engagement with the circumferent groove and the spaced recesses, adjusting knobs on the ends of the mandrel, hair-curler supports integral with the yoke and protrudent longitudinally therefrom in spaced. relation to the knobs, a hair-clamping bail hinged to the mandrel at one end of the hair-curler, a dual bail-mandrel fastener comprising an enlargement on the free end. of the hail, the said enlargement being adapted for frictional ens.

gagement with the cooperant bearing, the latter containmg an annular interior groove and forming a keeper to accommodate the bail-mandrel fastener.

, 6. A hair-curler comprising in combination a slidable mandrel adapted for forward and reverse rotation, a mandrel support comprising an elongated yoke coextensive: with the mandrel and having a bearing at each end thereof, mandrel-locking means comprising a circumferent ball-race of graduated depth in the mandrel at one end of the yoke, a groove of graduated depth within the cooperant mandrel bearing in alinement with, and eccentric to, the circumferent race, a resilient stop for the mandrel operable between the circumferent race and the eccentric groove, the circumferent race being responsive to the sliding adjustment of the mandrel for the adjustment of the stop within the eccentric groove, the eccentric. groove being automatically responsive to the re verse rotation of the mandrel to force the stop into frictional engagement with the circumferent race, the stop being responsive to the graduated depths of the circumferent race and the eccentric groove, adjusting knobs on the ends of the mandrel, hair-curler supporting members integral with the yoke and coextensive with the knobs, a bail hinged to the mandrel at the said end of the yoke, a dual functioning bail-mandrel fastener integral with the free end of the bail, and a keeper for the fastener formed within the mandrel hearing at the opposite end of the yoke.

7. A hair-curler comprising in combination an elongated yoke with bearings in the ends thereof, a slidable mandrel journaled within the said bearings and adapted for forward and reverse rotation, a mandrellock on one end of the hair-curler, the said lock comprising cooperant grooves of graduated depths in the mandrel and in the yoke, one groove being a circumferential race, the cooperant groove being a recess eccentric to the circumferential race, a mandrel-stop adjustably confined between the circumferential race and the eccentric recess, the mandrel-stop being responsive to the graduated depths of the grooves for adjustment therein; to the slidable adjustment of the mandrel for adjustment within the eccentric recess; and to the reverse rotation of the mandrel for frictional engagement therewith, a bail hinged to the mandrel, a dual-acting fastener for the bail and for the mandrel, the said fastener being integral with the free end of the bail, a keeper for the fastener formed within the yoke on the opposite end of the haircurler, adjusting knobs on the ends of the mandrel, and

curler-supporting members integral with the ends of the y yoke and adapted for engagement simultaneously with the rotation of the mandrel.

8. A hair-curler comprising in combination a mandrel support, a slidable mandrel journaled within the support and adapted for forward and reverse rotation, a mandrellock on one end of the hair-curler, the said lock comprising coacting cam-bottomed grooves in the mandrel and in the mandrel support at one end of the hair-curler, one of the grooves being a circumferentially disposed race, the other of the said grooves being eccentric to the circumferentially disposed race, a floating mandrelstop confined between the grooves and a resilient member in engagement with the stop, the circumferential race being responsive to the sliding adjustment of the mandrel for adjusting the stop within the eccentric groove, and

the eccentric groove being automatically responsive to the reverse rotation of the mandrel for forcing the step into frictional contact with the circumferential race, a bail hinged to the mandrel on the said end of the haircurler, a resilient fastener integral with the free end of the bail, an annular keeper for the fastener within the opposite end of the mandrel support and coextensive with the knobs, the curler support being adapted for operation simultaneously with the operation of the mandrel knobs.

:9. A hair-curler com'pris ingin combination an elongated yoke provided with mandrel bearings in the ends thereof, a slidable mandrel journaled within the mandrel bearings and adapted for forward and for reverse rotation, a mandrel lock on one end of the yoke, the said lock comprising a circumferential, cam-bottomed ball-race formed within the mandrel bearing, a plurality of cam-bottomed recesses formed in the cooperant end of the mandrel and circumferentially disposed in spaced alinement, the said recesses being eccentric to the circumferential ball-race, a floating mandrel-stop confined between each of the recesses and the circumferential ball-race, the said ball-race being responsive to the sliding adjustment of the mandrel for adjusting the floating mandrel-stops in the respective recesses, the said recesses being automatically responsive to the reverse rotation of the mandrel to force the floating mandrel-stops into frictional contact with the cams, knobs attached to the ends of the mandrel, hair-curler supporting members integral with the ends of the yoke and projecting longitudinally therefrom in spaced relation to the knobs, a bore extending transversely through the mandrel at the said end of the hair-curler, a bail hinged to the mandrel, the hinge of tthe said bail comprising a bearing member integral with the bail and pivotally mounted within the bore, a fastener for the bail and the mandrel, the

i said fastener being an enlargement of the free end of the bail, and a keeper for the fastener comprising an annular recess in the mandrel bearing at the opposite end of the hair-curler. L

10. A hair-curler comprising in combination an elongated yoke having mandrel bearings in the ends thereof, a mandrel journaled within the said bearings and adapted for hair winding and unwinding, a mandrel control means in one end of the hair-curler comprising a cam-bottomed ball-race in the mandrel concentric with the longitudinal axis thereof, a cam-bottomed recess within the cooperant mandrel bearing, the recess being in alinement with, and eccentric to, the concentric ball-race, a floating stop for the mandrel confined between the cam of the race and the cam of the recess, the mandrel being slidable within its hearings to adjust the mandrel-stop within the eccentric recess, the cam of the eccentric recess being automatically responsive to the unwinding of the mandrel to force the mandrel-stop into frictional engagement with the ball-race, adjusting knobs attached to the ends of the mandrel, hair-curler supports integral with the ends of the yoke and protrudent longitudinally therefrom in spaced relation to the knobs, the said supports being adapted for engagement simultaneously with the rotation of the mandrel, a bore extending transversely through the mandrel, a bail hinged to the mandrel at the said end of the hair-curler, a fastener for the bail and the mandrel integral with the free end of the bail, a keeper for the fastener formed within the yoke at the opposite end of the hair-curler, thehinge of said bail comprising a bearing member integral with the bail and pivotally mounted within the bore.

11. A hair-curler comprising in combination an elongated yoke, a longitudinally adjustable mandrel within the yoke and adapted for forward and reverse rotation, a lock for the mandrel comprising cooperant grooves in the mandrel and in the yoke, a rollable stop confined between the said grooves, one of the grooves being a circumferential race of graduated depth, the cooperant groove being a recess of graduated depth and eccentric to the circumferent race, the mandrel being longitudinally adjustable to adjust the mandrel-stop within the eccentric recess, the said eccentric recess being automatically responsive to the reverse rotation of the mandrel to force the mandrel-stop into frictional engagement with the coactin'gj grooves, mandrel-adjusting knobs on the mandrel, hair-curler supporting members integral with the yoke, a bore in one end of the mandrel, a sectoral recess in the mandrel and intersecting the said bore, a hair-clamp;

9 ing bail hinged to the mandrel, a fastener for the bail and the mandrel integral with the free end of the bail, a keeper for the fastener formed within the cooperant bearing, the hinge of the said bail comprising a bearing member and a cooperant fin integral with the hail, the bearing member being mounted within the said bore and the fin being mounted within the sectoral recess.

References Cited in the file of this patent UNITED STATES PATENTS Sterling June 14, 1932 Binder Dec. 4, 1934 Soley Dec. 17, 1935 Cofifelder Feb. 25, 1936