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Publication numberUS2865377 A
Publication typeGrant
Publication dateDec 23, 1958
Filing dateApr 30, 1956
Priority dateApr 30, 1956
Publication numberUS 2865377 A, US 2865377A, US-A-2865377, US2865377 A, US2865377A
InventorsSchroer Walter E, Trybinski Jr Victor, Walling Irvin H
Original AssigneeLoose Leaf Metals Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Utility prong metal
US 2865377 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

5 w. E. QCHROER ETAL 2,865377 UTILITY PRONG METAL Filed April 30, 1956 United States Patent Cfiice 2,865,377 TY QNG ME A? assigno'rsjto Loose Leaf. Metals Qomgaiiy, Louis,

The present invention, relates generally.,.to,loose leaf metals, and more particularly tolocking and release mechanism for loose leaf metals of' the hinged multipo i n t pe.

n i the prese nv n io a p e d em odiment, includes an arcuate cam member mounted upon one prong supporting membenof a hinged utility prong metal, and an arcuate lock bracket and, a reciprocable rin -b n etehfl em e manne upon he other prong supporting member of said metal. The cam member and lock bracket are disposed in relation to each other, so that they substantially overlap in one extreme position of movement and are entirely separated in the other extreme position of movement.

An object of the present invention is to provide a novel locking mechanism for loose leaf binder metals which is effective in multi-positioning the metal.

Another object of the present invention is to provide a novel locking mechanism for loose leaf binder metals, which will permit the binder metal to be closed without manipulation of the locking mechanism, but which requires releasing action to open to the selected position.

Another object of the present invention is to provide a novel locking mechanism for loose leaf binder metals, which is positive in action, and which has all the parts thereof within the binder metal, thereby minimizing accidental release and breakage.

Other objects are to provide a novel locking mechanism for loose leaf binder metals, which is of sturdy construction, hence, will function indefinitely without repair, which may be readily manipulated by a user, and which otherwise fulfills the objects and advantages sought therefor.

The foregoing objects and advantages, and others, will be apparent from the following description taken with the accompanying drawing, in which:

Figure 1 is a side view of a utility prong metal incorporating the present invention, a cover being shown in broken lines;

Figure 2 is an end view thereof, a cover and sheets being shown in broken lines;

Figure 3 is a rear view thereof on a larger scale;

Figure 4 is a front View thereof on a still larger scale, the novel locking mechanism being closed, the center prongs being broken away for clarity;

Figure 5 is a view similar to Figure 4, the locking mechanism being in intermediate position;

Figure 6 is a view similar to Figure 4, the locking mechanism being in released position;

Figures 7, 8 and 9 are transverse vertical cross-sectional views taken on substantially the lines 77, 88, and 99 of Figure 4;

Figure 10 is a transverse, vertical cross-sectional view taken on substantially the line 10-10 of Figure 5;

Figure 11 is a transverse, vertical cross-sectional view taken on substantially the line 11-11 of Figure 6;

Figure 12 is a view of the flat blank from which th latch member is formed;

Figure 13 a m efla lank. r mzw iqhnha lock. bracket is formed;

Figure 14 isa view ofthe flat blank from whiclpthe cam is formed, and

Figure. 15 is view. of the latching end .of thedatch, mem r. e ain n R t n n mken t to conserve space.

Referring to the drawing. mQI P. al:tit1 l a 11 y..byfigfqlfi ence, numerals, 20 indicates, ge'nerally a. utility 'pron g metal, andl22 refers. to the novel lockingn echanism. mounted there on, l i i 'The metal 20 includes angle members 24 and..25 .con-, nected by. a piano hinge. 26,, each of. which supports spacedprongs 27. In 'FiguresI and 2,. cover members and removablisheets (are. ,shown. by broken, lines.

The locking mechanism 22 includes an, arcuate, cam. 32 ecu ed by..rivets 33 [to the mefmber 25,. an ,areuate lockfbracket ,35. ,s'curedjto the member 24. by. rivets I 36,, and, .a latchfmember 38 ,moun tedfpn the member 24 ,for. reciprocation ion rivets 39.. l

The camw32 includes a slot 41,: a .ca m. edge 42 leading to ,the slot 41, astopfshoulder .43, and..a..cam. edge .44, leading to the shoulder, 45,. Theseafeatures. are .clearly shownin Figure 14. The lock bracket 35 includes a slot 45 (Fig. 13).

The latch member 38 has a thumb tab 46, elongated openings 47, a cut-away 48 in one side, a vertical tab 49, and a vertical tongue or flange 50 at one end (Fig. 12). The openings 47 receive the rivets 39. Within the cutaway 48 is a helical tension spring 52, one end of which is anchored to the tab 49 and the other end of which is anchored to a tab 53 struck out of the member 24. The tongue 50 extends upwardly into the slot 45 of the lock bracket 35. The spring 52 biases the latch member 38 into the longitudinal relationship shown in Figures 46.

In use, the locking mechanism 22 normally maintains the members 24 and 25 of the metal 20 in the position of Figure 4, the locked relation. The tongue 50 is in the slot 41 of the cam 32. To release, the thumb tab 46 of the latch member 38 is pushed inwardly to free the tongue 50 from the slot 41. Thereupon, the metal 20 may be pivoted to the full open position of Figure 6, if the thumb tab 46 is held inwardly, or to the intermediate position of Figure 5 if the thumb tab 46 is immediately released once the tongue50 leaves the slot 41.

In the full open position of Figure 6, sheets may be removed from or placed on the prongs 27. In the intermediate position of Figure 5, the sheets may be readily worked on or viewed, yet remain on the prongs 27.

To close the metal 20 from the position of Figure 6, the members 24 and 25 are pivoted towards each other. The tongue 50 is automatically guided by the cam edges 44 and 42 into the slot 41, the locked position. If desired, the metal 20 may be left in the intermediate position of Figure 5.

It is manifest that there has been provided a novel locking mechanism which fulfills the objects. and advantages sought therefor.

It is to be understood that the foregoing description and the accompanying drawing have been given by way of illustration and example. It is also to be understood that changes in form of the elements, rearrangement of parts, and substitution of equivalent elements, which will be obvious to those skilled in the art, are contemplated as within the scope of the present invention which is limited only by the claim which follows.

What is claimed is:

In combination, a loose leaf metal including two prong supporting members, prongs mounted on each supporting member, means pivotally connecting said prong supporting members so that said supported prongs are mov able in arcs from open position to overlapping closed nted. D c.- 23. 58;

ii Q,

\1 position, an arcuate cam member secured to one supporting member intermediate the ends thereof including a strip portion in arcuate form transversely spanning a portion of said one supporting member, an arcuate bracket secured to the other prong supporting member intermediate the ends thereof and in operative opposed relation to said arcuate cam member including a strip portion in arcuate form transversely spanning a portion of said other supporting member, said bracket overlying the arcuate cam member when said prong supporting members are in position with the prongs in closed relation, said arcuate cam member being disposed between the bracket and said supporting members when the prongs are in closed relation, said arcuate cam member and said bracket being in separated relation when said said prong supporting members are in position with the prongs in open relation, an elongated latch member mounted on the supporting member to which said bracket is secured for longitudinal reciprocative movement transversely of said bracket and said cam member, said latch member having an angularly directed tongue at one end and a thumb piece at the other, said bracket including a transverse slot in a plane parallel with its supporting member, said tongue being disposed in said transverse slot of said bracket, said cam member including a transverse shoulder, a cam surface at each side of said shoulder, and a transverse slot spaced from said shoulder in a plane parallel with its supporting member, said cam surface between said shoulder and said transverse slot in said cam member leading from the inner end of said shoulder to the open end of said transverse slot to guide the latch member tongue from the shoulder into the transverse slot, said tongue engaging said transverse shoulder in one position of said supporting members and engaging in said transverse slot of said cam member in another position of said supporting members, and spring means biasing said latch member longitudinally outwardly and said tongue towards engagement with the closed end of the bracket slot, said cam surface of said cam member between said shoulder and said slot of said cam member providing automatic guide means to direct said latch tongue from shoulder engaging position to slot engaging position upon closing movement of said supporting members.

References Cited in the file of this patent UNITED STATES PATENTS 2,091,189 St. Louis Aug. 24, 1937 2,247,397 Oman July 1, 1941 FOREIGN PATENTS 708,742 France May 4, 1931 724,926 France Feb. 5, 1932

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2091189 *Nov 11, 1935Aug 24, 1937Wilson Jones CoLoose leaf binder
US2247397 *Oct 4, 1938Jul 1, 1941Oman Gustaf HLoose-leaf binder
FR708742A * Title not available
FR724926A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4352582 *Jan 8, 1980Oct 5, 1982Erik EliassonLoose leaf binder
US7275886Jun 17, 2004Oct 2, 2007World Wide Stationary Mfg. Co., Ltd.Positive lock ring binder mechanism
US7296946Dec 18, 2002Nov 20, 2007Microsoft CorporationRing binder mechanism
US7404685Dec 30, 2004Jul 29, 2008World Wide Stationery Manufacturing Company, LimitedRing binder mechanism spring biased to a locked position when ring members close
US7524128Mar 9, 2006Apr 28, 2009World Wide Stationery Manufacturing Company LimitedRing binder mechanism spring biased to a locked position
US7534064Jan 12, 2005May 19, 2009World Wide Stationery Mfg. Co., Ltd.Ring mechanism biased to closed and locked position
US7549817Jun 17, 2004Jun 23, 2009World Wide Stationery Mfg. Co., Ltd.Ready lock ring binder mechanism
US7597498Mar 20, 2007Oct 6, 2009World Wide Stationery Mfg. Co., Ltd.Positive lock ring binder mechanism
US7600939May 8, 2007Oct 13, 2009World Wide Stationery Mfg. Co., Ltd.Ring binder mechanism with sliding hinge plate
US7648302Dec 13, 2006Jan 19, 2010World Wide Stationery Mfg. Co., Ltd.Ring binder mechanism
US7661898Dec 10, 2004Feb 16, 2010World Wide Stationery Manufacturing Company, LimitedSoft close ring binder mechanism with reinforced travel bar
US7661899Jul 27, 2005Feb 16, 2010World Wide Stationery Mfg. Co., Ltd.Lever for a ring binder mechanism
US7665926Jun 21, 2005Feb 23, 2010World Wide Stationery Mfg. Co., Ltd.Ring mechanism with spring biased travel bar
US7704005Nov 21, 2006Apr 27, 2010World Wide Stationary Mfg. Co., Ltd.Ring mechanism having locking element operatively connected to lever
US7726897Feb 15, 2007Jun 1, 2010World Wide Stationery Mfg. Co., Ltd.Ring binder mechanism
US7731441Mar 2, 2007Jun 8, 2010World Wide Stationery Mfg. Co., Ltd.Ring binder mechanism
US7744300Dec 12, 2007Jun 29, 2010World Wide Stationery Mfg. Co., Ltd.Ready lock ring binder mechanism
US7748922Mar 15, 2005Jul 6, 2010World Wide Stationery Manufacturing Company, LimitedRing binder mechanism with dual pivot locking elements
US7758271Mar 6, 2009Jul 20, 2010World Wide Stationery Mfg. Co., Ltd.Ring mechanism biased to closed and locked position
US7762734Jul 11, 2008Jul 27, 2010World Wide Stationery Mfg. Co., Ltd.Ring binder mechanism
US7819602Oct 31, 2007Oct 26, 2010World Wide Stationery Mfg. Co., Ltd.Ring binder mechanism
US7828491Aug 22, 2005Nov 9, 2010World Wide Stationery Mfg. Co., Ltd.Travel bar for use with a ring mechanism
US7878729May 31, 2005Feb 1, 2011World Wide Stationery Manufacturing Company, Ltd.Intermediate connector for a ring binder mechanism
US7891901Oct 22, 2008Feb 22, 2011World Wide Stationery Mfg. Co., Ltd.Ready lock ring binder mechanism
US7950867Mar 8, 2010May 31, 2011World Wide Stationery Mfg. Co., Ltd.Lever for a ring binder mechanism
US8002488Jun 17, 2004Aug 23, 2011World Wide Stationery Mfg. Co., Ltd.Soft close ring binder mechanism
US8038361Jan 18, 2011Oct 18, 2011World Wide Stationery Mfg. Co., Ltd.Ready lock ring binder mechanism
US8043018Jul 15, 2010Oct 25, 2011World Wide Stationery Manufacturing Co., Ltd.Ring binder mechanism
US8047737Apr 6, 2007Nov 1, 2011World Wide Stationery Mfg. Co., Ltd.Ring binder mechanism
US8052343Jul 14, 2009Nov 8, 2011World Wide Stationery Mfg. Co., Ltd.Ring binder mechanism
US8118513 *Mar 1, 2007Feb 21, 2012Keba Sweden AbBinder lock mechanism including a manually adjustable locking bar
US8147160Sep 23, 2008Apr 3, 2012World Wide Stationery Mfg. Co., Ltd.Ring binder mechanism with polymeric housing and actuator
US8162556Dec 30, 2008Apr 24, 2012World Wide Stationery Mfg. Co., Ltd.Actuator for a ring binder mechanism
US8186899May 27, 2010May 29, 2012World Wide Stationery Mfg. Co., Ltd.Ring binder mechanism
US8414212Dec 20, 2010Apr 9, 2013Hung Yuen ChengRing binder mechanism
US8480327Jul 15, 2011Jul 9, 2013Hans Johann HornBinder apparatus
US8573876Mar 15, 2005Nov 5, 2013World Wide Stationery Manufacturing Company, LimitedSoft close ring binder mechanism with mating ring tips
US8801317Oct 31, 2011Aug 12, 2014World Wide Stationary Mfg. Co., Ltd.Ring binder mechanism
US8814458Nov 10, 2009Aug 26, 2014World Wide Stationery Mfg. Co. Ltd.Lever for a ring binder mechanism
US8851783Aug 25, 2011Oct 7, 2014World Wide Stationary Mfg. Co. Ltd.Ring binder mechanism having snap-in ring members
US8899864Aug 25, 2011Dec 2, 2014World Wide Stationery Mfg., Co., Ltd.Ring binder mechanism having unitary structure
US8899865Aug 25, 2011Dec 2, 2014World Wide Stationery Mfg. Co., Ltd.Ring binder mechanism having retaining system on ring members
US8899866Jun 20, 2012Dec 2, 2014World Wide Stationary Mfg. Co. Ltd.Ring binder mechanism with self-locking actuator
Classifications
U.S. Classification402/33
International ClassificationB42F13/00, B42F13/26
Cooperative ClassificationB42F13/26
European ClassificationB42F13/26