US2251915A - Stapling pliers - Google Patents

Description

Aug, 12, 1941. s. A. CROSBY4 2,251,915

STALLING lPLIIERS Filed April 26, 1958 2 Sheets-Sheet 1 ATTORNEY Aug. 12, 1941. s. A. CROSBY STAPLING PLIERS Filed April 26, v1958 2 Sheets-Sheet 2 I INVNTOR. l

BY l

ATTORNEY.

Patented Aug. 12, 1941 STAPLING PLIERS Stephen A. Crosby, New York, N. Y., assigner to Speed Products Company, Long Island City,

Application April 26, 1938, Serial No. 204,288

15 Claims.

The invention relates to a stapling machine of the type particularly adapted to be utilized as plier or tacker and an object thereof is realized in the provision of an improved and serviceable plier wherein a staple carrying arm is interposed and pivotally sustained between a pair of swingably associated upper and lower complements or handles, the upper of which is operatively connected to a slidable plunger for driving a staple from a vertical staple driveway of the magazine of the arm while the lower oomplement or base of the pair swingably carries a spring controlled cradle having means for automatically but disengageably interlocking with the staple carrying magazine of the arm in which event if the lower complement is swung relatively towards the magazine, staple indentations of an anvil fixedly sustained by the base is caused to be in vertical alinement with the vertical staple driveway of the magazine to receive and deform the staple on leaving the staple raceway. Other objects, advantages, and features of the invention will be more readily understood from the teachings of the following detailed description considered in the light of the accompanying drawings in which:

Fig. l is a perspective view of the hand staple plier according to my invention.

Fig. 2 is a View similar to Fig. 1 but illustrating the staple carrying arm uncoupled from the anvil carrying and swingable base.

Fig. 3 is a vertical and longitudinal sectional view of Fig. l shown partly broken away.

Fig. 4 is an exploded view of the driving connection between the upper handle and staple driving plunger.

Fig. 5 is a sectional View on the line 5 5 of Fig. 3.

Fig. 6 is an exploded View showing the leaf spring, the rockable cradle, and the fulcrum pin against which the cradle is pivotally and yieldingly held by the leaf spring.

Fig. 7 is an enlarged sectional view on the line '1 1 of Fig. 3.

Fig. 8 is a sectional view on the line 8-8 of Fig. 3.

Fig. 9 is a plan View of the latch for disconnectably locking the cover and magazine of the split arm.

Fig. 10 is a sectional view on the line l-I of Fig. 7.

Fig. 11 is an open perspective View of the plier.

Fig. 12 is a sectional View on the line l2--l2 of Fig. 3, and

Fig. 13 is a sectional view on the line {3-13 of Fig. 3.

The plier according to the invention includes a frame F constituting a pair of handles comprising an upper component or actuator Il) and a lower component or base l. Depending ilared ears I2 of component lll and the upstanding liared ears I3 of component Il are pivotally mounted on the upset fulcrum pin it which also pivotally sustains spaced ears I5 depending from the rear part of cover IS of the staple carrying arm generally denoted l1, and the spaced ears i8 extending upwardly at the rear of the magazine I9 of the arm. Thus by the present arrangement the complements of the frame F may be swung towards or away from the arm ll. It will be noted that the ends o1" inwardly curved spring clip Irl resiliently retained on pin lll cooperates with the enlarged portions lli ofthe latter and the inner faces of the depending ears i5 to prevent longitudinal displacement of this fulcrum pin.

Approximately mounted within magazine I9 is a rail 20 defining with the front wall 2| of the arm Il a vertical staple receiving driveway 22 adapted to receive the foremost staple 23 of the staple strip 2d slidably guided on rail 2%. For urging the foremost staple of the strip into vertical alinement with the driveway 22, a spring controlled channel shaped follower 25 is provided and a struck out eye 26 of the follower is threaded onto an end coil 2l of helicoidal spring 28 which has an intermediate portion trained over a rotatable roller 29 mounted on a shaft 3l) slidaloly guided in the spaced gaps 3l in sides 38 of the rear channel shaped member 39 forming the rear part of the cover IS.

The upper end. 34 of the helicoidal spring 24 has one or more coils 35 hooked on offset projection 36 of a block 31 fixedly secured to one side 38 of the channel shaped member 3S.

Slidably guided in the spaced slots 3l of the sides 32 of front channel shaped member 33 and the horizontally alined slots 3| in the front part of cover 39 is a latch 4l! having laterally extending conveniently accessible wings 4l. With the cover closed in respect to the magazine as shown in Fig. 1, intermediate parts 42 (Fig. 9) of the latch are received in alined gaps 42 of the upstanding wings 43 extending upwardly from the sides of the magazine I9, that is, in the closed relation of the magazine and cover helicoidal spring 28 normally urges slidable latch Ml rearwardly to interlock vwith the wings 43, however concomitantly urging the slidable follower 25 forwardly to urge the staple strip forwardly and dispose the foremost staple in alinement with the vertical raceway 22.

Slidably guided by the cover I5 is a channel shaped plunger 44 (Fig. 4) which carries a staple ejecting blade 45. This plunger is normally held elevated by end 46 of leaf spring 41 abutting lugs 48 of the sides 5) of the channel shaped plunger 44. This leaf spring ll'i has its other end 56 suitably fixed to a mount 5I fixed within the cover I6.

Fixedly secured to the front offset manipulator head 52 of the swingable actuator or handle I6 is a channel shaped bracket or coupling 53 having sides 54 each provided with a recess 55 for receiving and interlocking with inwardly turned lugs 56 projecting from sides 49 of the plunger. If therefore a downwardly directed blow is imp-arted to the manipulating head 52, bracket 53 causes lugs 55 to be shifted downwardly and consequently the plunger is driven in a corresponding direction. f

If the plunger is moving downwardly, the blade 45 meets the foremost staple and drives the latter through the raceway and the legs of the driven staple penetrate papers or the like interposed between t'he fixed anvil 5'! and the magazine. Ultimately the lugs of the ejected staple meet the clinching indentations 58 and the staple becomes appropriately deformed for fastening purposes.

According to the invention, a cradle 6I) (Fig. 6) isrotatably or pivotally associated with the base or lower handle I I of-the frame F to disconnectably interlock with the magazine. For this purpose, a fixed fulcrum pin 6I is employed. This fulcrum pin is fastened to ears I3 of the base II. The cradle is in the form of a channel shaped member and comprises a base 52 seated on the free end of the cantilever leaf spring 63 having its forward end 64 anchored by rivets 65 to the swingable base I I. Sides 660i the cradle each include a slot or bearing 61 for receiving reduced portions 68 cf fulcrum pin, and when assembled portions of the sides 66 adjacent slots 6l pivotally and loosely interlock with the grooves defining the reduced portions 68 and the leaf spring 63 normally holds stop 69 against the fixed pin 6I. Thus the cradle is held ina normally raised position.

The cradle is also provided with an upstanding latch 'Ill having a forwardly curved or inclined lip 'II, and spaced notches 'I2 defining the reduced portion 73. Extending forwardly of the sides of the cradle are the projections 'IfI each having a laterally extending lug or finger manipulator '15.

With the magazine disconnected from latch 'E0 as shown in Fig. 2 the cover may be swung relative to the base in which event the cover may be used as a tacker. If the cover be swung towards the base shoulders 'I6 defining a portion of the narrow opening 'i7 in the bottom wall rof the magazine I9, simultaneously abut the curved lip 'HI of the latch T8, causing the latter to be tilted forwardly and the manipulating fingers 'f5 downwardly, that is, the cradle is slightly rotated in a counterclockwise direction until the rectilinear part 'i8 of the latch starts t0 abut faces 79' of the spaced shoulders 'I6 in which case the head 'II of the latch is received in the enlarged or expanded square shaped opening 80 which together with the narrow or restricted opening 'I constitute a T shaped openingV or slot. Therefore further movement ofthe arm of the magazine towards the base causes shoulders 'I6 of the mazazine to ultimately line up with slotsV 'I2 of the latch i foremost staple.

in which case spring 63 releases its energy, the cradle is rotated in a clockwise direction, causing the reduced portion 'i3 of the latch to be received by the narrow opening 'I'I of the magazine I9 and the shoulders 'I6 to be received by slots 12 of the latch l0, and the rear transverse face 'I9 of the narrow opening 'I'I constitutes stop means to limit clockwise movement of the cradle as is evident from Figs. 3 and 8.

To disengage the latch of the cradle from the magazine either of the manipulating fingers 'I5 which are conveniently accessible and extend laterally of the magazine may be depressed, causing the cradle to be rotated in a counterclockwise direction against the energy of leaf spring 63 until the reduced portion 'i3 of the latch is free of spaced shoulders 'I6 of the magazine in which case the inclined lip il of the latch is within wide or expanded opening B and thus becomes free of the magazine, or in other words, the latter is unlocked from the magazine, and may be swung relative to the base.

Where it is desired to open the arm I 'I to obtain access to the rail, this can be accomplished by first shifting latch 46 forwardly to disconnect the latter from the magazine, then swinging the cover away from the magazine in which event access may be had to the rail. If the cover be swung rearwardly, the staple follower is automatically retracted. If the cover be swung towards the magazine cam surfaces 8| of wings 43 cause latch 48 to shift forwardly until portions 42 of the latter line up with slots 42 of the wings 43 whereupon the action of the helicoidal spring causes the roller 29 to retract and shift portions 42 into slots 42' of wings lit. In this way the cover and magazine are automatically locked and preparatory to such locking action tongue 82 of the cove1` fits into notch 83 of the magazine to facilitate proper positioning of the cover in respect to the magazine.

As previously pointed out the swingable complements of frame F are utilized in the matter of effecting the discharge and deforming of a Forv purposes of specification, these complements may be considered as swingable curved handles which if moved towardsv each other when the lower complement is locked by the cradle and when the split arm I'I is closed, operate to position the clinchingv indentations of the anvil under staple driveway while the plunger drives the foremost staple out of the arm to be deformed by the anvil. These handles are also properly shaped to be conveniently grasped by one hand of the operator and after each clinching operation, the handles are automatically moved outwardly to their normal position by the leaf springs 47 and 63.

When the cradle is locked to the magazine, walls 84 and 85 of slots 12 of the latch thereof, straddle shoulders 'I6 of the magazine. If therefore the magazine is moved downwardly shoulders 'I6 abut walls 84 thus causing the latch to be .shifted downwardly against the energy of spring seat 63. This action takes place on each downward stroke of the -driver if the cradle be inter-V locked with the magazine and although the cradle is idly shifted downwardly advantage is taken ofV this action in that the spring seat 63 is flexed, and su-ch stored energy is utilized to automatically return the swingable base II to its normal position when hand pressure be removed Yfrom the handles an-d yduring such automatic retraction shoulders 'I6 abut walls 85 of the spaced slots 'I2 of the latch 'I8 of the cradle.

As many changes could be made in the above described construction and many widely different species orstructural embodiments could be devised without departing from the scope thereof, it is intended that all matter hereinbefore described in the specication and illustrated in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

I claim:

l. In combination, an upper handle comprising a head and a downwardly sloping rear portion, a lower handle comprising an upwardly sloping rear portion received and strad-dled by said downwardly sloping portion, a staple carrying arm comprising a magazine and a cover interposed between said handles and having a rear part lhoused by said sloping portions, spring controlled staple driving. means slidably guided by said arm, fulcrum means pivotally sustaining said sloping portions and said magazine and cover, movable locking means for disconnectably securing said magazine and cover, coupling means interconnecting said upper handle and driving means, a staple clinching anvil carried by said lower handle, and locking means sustained by said lower handle for -disconnectably engaging said arm.

2. In combination, an upper handle comprising a head and downwardly sloping rear portion, a lower handle comprising an upwardly sloping rear portion, a staple carrying arm interposed between said handles and having a rear part housed by said sloping portions, spring controlled staple driving means slidably guided by said arm, fulcrum means pivotally sustaining said sloping portions and said rear part, driven means interconnecting said upper handle and driving means, a staple clinching anvil carried by said lower handle, a rockable cradle sustained on said lower handle and having means for disengageably interlocking with said arm, and a spring seat for said rockable cradle.

3. In combination, an upper handle comprising a head and downwardly sloping rear portion, a lower handle comprising an upwardly sloping rear portion, a staple carrying arm interposed between said handles and having a rear part housed by said sloping portions and including a magazine comprising an expanded and a restricted opening in communication, spring controlled I staple driving means slidably guided by said arm, iulcrum means pivotally sustaining said sloping portions and said rear part, coupling means interconnecting said upper handle and driving means, a stapling clinching anvil carried by said lower handle, rockable locking means pivotally sustained on said lower handle and comprising a base having an upstanding latch having means adapted to enter said expanded opening and means for interlocking with said magazine adjacent said restricted opening, and a spring sustained by said lower handle for resiliently supporting said base.

4. In combination, an upper handle comprising a head and downwardly sloping rear portion, a lower handle comprising an upwardly sloping rear portion, a staple carrying arm interposed between said handles and having a rear part housed by said sloping portions and including a magazine having a large opening and a narrow opening in communication, spring controlled staple driving means slidably guided by said arm, fulcrum means pivotally sustaining said sloping portions and the rear part of said arm, coupling means interconnecting said upper handle and driving means, a staple .clinching-'anvil carried by said lower handle, cradle locking means sustained on said lower handle and having an upstanding .latch provided with a terminal inclined portion for abutting said magazine when entering said large opening and including a reduced portion adapted to be received in said narrow opening, and spring means for urging said reduced portion against a wall of said narrow opening.

5. In combination, an upper handle comprising an offsethead and downwardly sloping rear portion, a lower handle comprising an upwardly sloping rear portion received and straddled by said downwardly sloping portion, a staple carrying arm interposed between said handles and having a rear part housed by said sloping portions, spring controlled staple driving means slidably guided by said arm, fulcrum means pivotally sustaining said sloping portions and the rear part of said arm, coupling means interconnecting said upper handle and driving means, a staple clinching anvil carried by said lower handle, other fulcrum means carried by said lower handle, a cradle having means rotatably guided by said other fulcrum meansy a latch carried by said cradle, and a spring `for holding said cradle against said other fulcrum means.

6. In combination, an upper handle comprising a head and downwardly sloping rear and flared portion, a lower handle comprising an upwardly sloping rear and iiared portion telescopically associated with said downwardly sloping portion, a staple carrying arm interposed between said handles and having a rear part housed by said sloping portions, spring controlled staple driving means slidably guided by said arm, fulcrum means pivotally sustaining said sloping portions .and sai-d rear part, coupling means interconnecting said upper handle and driving means, a staple clinching anvil carried by said lower handle, rockable locking means sustained by said lower handle for disconnectably engaging said arm, and spring means for yieldingly supporting said rockable locking means.

7. In combination, a magazine having spaced sides, a handle, means pivotally sustaining said magazine and said handle, fulcrum means, and a cradle pivotally sustained against said fulcrum means and having an upstanding latch for interlocking with said magazine and having forwardly projecting means including finger gripping means extending laterally and outwardly of the body of said cradle and laterally and outwardly of said sides and adjacent thereto for actuating said latch to remove the latter from interlocking relation with said magazine.

8. In combination, a magazine having spaced sides, a handle, means pivotally sustaining said magazine and said handle, a spring carried by said handle, a rockable cradle supported by said spring and having latch means for disconnectably locking said magazine, spaced extensions integral with said latch means and projecting forwardly thereof, and finger gripping means projecting from said extensions and extending laterally and outwardly of said sides and adjacent the latter for bodily actuating said cradle for disconnecting said latch means from said magazine.

9. In combination, a staple carrying magazine having a bottom wall, a handle, means pivotally sustaining said magazine and said handle, -a leaf spring carried by said handle, fulcrum means traversing said handle, and a rockable cradle supported by said spring pivotally against said fulcrum means and having latch means for disconnectably interlocking with said magazine and accessible ringer gripping means disposed forwardly ofV said latch means and extending laterally and outwardly of said wall to overhang said handle intermediate the latter and said magazine whereby said cradle may be bodily actuated for unlocking said latch means from said magazine.

10. The combination according to claim `8 wherein said cradle is a channeled member having spaced and notched sides pivotally sustained against said fulcrurn means and said finger gripping means being disposed forwardly of said latch means and comprises spaced lips extending laterally and outwardly of said spaced sides of said magazine and between said handle and magazine, and said spring yieldingly urging said notched sides -against said fulcrum means.

11. In combination, a staple carrying magazine having spaced sides, a handle, means pivotally sustaining said magazine and said handle, a leaf spring carried by said handle, fulcrum means carried by said handle, `and a rockable cradle supported `by said spring pivotally against said fulcrum means and having latch means for disconnectably interlocking with said magazine, and accessible finger gripping means projecting from said cradle and disposed forwardly of said latch means between said magazine and handle and extending laterally and outwardly of said magazine to overhang said handle for disconnecting said latch means from said magazine.

12. In combination, an upper handle comprising a head and downwardly sloping rear and ared portion, a lower handle comprising an upwardly sloping rear and flared portion swing-ably straddled by said downwardly sloping portion, a staple carrying arm interposed between said handles and having a rear part housed by said sloping portions, staple driving means slidably guided by said arm, and fulcrum means pivotally sustaining said sloping portions and said rear part.

13. In combination, an upper hollow handle comprising a head and downwardly sloping rear and ilared portion having spaced lips, a lower handle comprising an upwardly sloping rear and ilared portion having spaced lips movably straddled by said spaced lips of said downwardly sloping ared portion, a staple carrying arm interposed between said handles and having a rear part movably straddled by said lips, staple driving means slidably guided by said arm, and fulcrum means pivotally sustaining said sloping portions and said rear part.

14. In combination, an upper handle comprising a head and downwardly sloping rear and ared portion having spaced lips, a lower handle comprising an upwardly sloping rear and flared portion having spaced lips straddled by said spaced lips of said downwardly sloping portion, a staple carrying arm interposed between said handles and having a rear part straddled and housed by said lips, staple driving means slidably guided -by said arm, fulcrurn means pivotally sustaining said sloping portions and said rear part, staple driving means carried by said arm, and a connection between said head and driving means. v

15. In combination, an upper handle comprising a head and downwardly sloping rear and flared portion, a lower handle comprising an upwardly sloping rear and flared portion straddled bysaid downwardly sloping portion, a staple carrying arm interposed between said handles and having a rear part housed by said sloping portions, staple driving means slidably guided by said arm, and fulcrum means common to said handles and arm for pivotally sustaining said sloping portions and said rear part.

STEPHEN A. CROSBY.

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