US2370482A - Wire-block stripper - Google Patents

Description

Feb. 27, 1945.

w. MORGAN ET AL 2,370,482

WIRE BLOCK STRIPPER Filed 001;. 7, 1942 3 Sheets-Sheet l WELD MORGAN CLARKE D. WESSON Feb. 27, 1945. w. MORGAN ET AL 2,370,482

WIRE BLOCK STRIPPER Filed Oct. 7, 19 12 3 Sheets-Sheet 2 WELD M0112 can CLARKE D. WESSON.

Feb. 27, 1945. w. MORGAN ET AL WIRE BLOCK S'I'RIPPER Filed 001;. 7, 1942 3 Sheets-Sheet 3 Eli? H gwoe/wbou VVELD M05051 CLARKE A, 'Wessozv Patented Feb. 27, 1945 UNITED STATES PATENT, OFFICE Weld Morgan and Clarke D. Wesson, Worcester,

Mass.,assignors to Morgan- Construction Company, Worcester, Mass, a corporation of Massachusetts Application October 7, 1942; Serial No. 461.212

4 Claims.

invention relates to wire block strippers, and'more particularly to strippers or the collapsible type so arranged that the wire bundle can b readily dropped therefromupon a truck or other place of deposit.

[Strippers of this type as heretofore constructed have included a manually releasable latch to hold the bundle-supporting leg in their expanded positions. Thewire bundles are heavy, and upon release of the :latch the weight of the bundle causes the legs to drop very suddenly, carrying the latch audits handle with them. Since the operator is grasping the handle at the moment of release, he is subjected to a very unpleasant and dangerous jerk. Other difiiculties are e'ncountered in these prior strippers resulting from lack of suflicient rigidity, and failure of the various parts to remain in proper alignment. v

It is accordingly one object of the invention to provide a collapsible stripper which will be safe and convenient for the operator.

, It is a further object of the invention to provide a collapsible stripper which will remain in proper operating condition-throughout along life of service. i With these and otherobjects in view, as will be apparent to those skilled in the art, the invention resides in the combination of parts set forth in the specification and covered by the claims appended hereto.

Referring to the drawings illustrating one einbodirne'nt of the invention and in which like reference numerals indicate like parts,

Fig.1 is am elevation ot a collapsible stripper in its expanded condition;

. Fig. 2 is an elevation of the stripper in its collapsed condition;

Fig. 3 is a fragmentary elevation taken in the direction of the :arrow 3 in Fig. 2;

Fig. 4 is a section on the line 4-4 of Fig. 2;

Fig. 5 is a section on the line 5-5 of Fig. 1;

Fig. 6 is a section on the line 66 of Fig. 4;

Fig. '7 isa section on the line 1-1 of Fig. 4; and

Fig. 8 is a section on the line 8-8 of Fig. 5.

The embodiment illustrated comprises a cylindrical head or block In having an upwardly projecting eye portion I I adapted to fit over the suspended hook (not shown) of a crane or other lifting apparatus. A vertical cylindrical rod [2 is screw-threaded at its upper end into the head l and depends therefrom, a set-screw [3 being provided to secure the rod in place. 'Upon this rod there is slidably mounted a flat circliilar hub l4 having rfour horizontal arms l5 radiating therefrom. The hub I4 i reenforced by means of ribs I6 '(Fig. 4) on its lower surface. The arms I5" taper outwardly from the hub, and as best shown in Fig. '7 they'are of inverted V form. in crosssection. On the outer ends of the arms it: there are provided forks [8 arranged to receive the upper ends of upright L-shaped legs [9 of rectangular' cross-section, which are pivotally connected to the forks by meanS of pins 20. These forks-"l8 are considerably wider in the vertical direction than the arms l5, and the forks fit the sides of the legs l9 closely, so that the legs are accurately guided and can move only in radial I planes.

1, the pins and 32 will all lie in a common The vertical-movements of the hub I4 relative to the rod I2 are utilized to swing the legs i9 about the pivot pins 20. For this purpose a spider 22 is mounted on the lower end of the rod and held in place by means of a nut 23. and a set screw 24. This spider is provided with four radially extending forks 26 each of which receives the head of an eye bolt 28. The heads 21 are connected to the forks 26 by means Olf pivot pins 30. Each bolt 28 is threaded into a U-shaped clevis 3| which straddles the correspondingleg l9 and isconnected thereto by a pivot, pin 32. The bolts 28 are provided with lock nuts 33 which can betightened against the clevises. 'It will be apparent that each bolt 28 and its clevis 3! form a link which can readily be adjusted in length.

With the stripper fully expanded asshown in horizontal plane. The stripper may be maintained in this condition by preventing relative sliding movement of the rod l2 and. the hub 14. For this purpose the rod is grooved circumferentially to receive a snap ring 35 which is arranged to engage the top of the hub when the stripper is expanded, thereby preventing the rod from dropping far enough to bring the pins 30 lower than the pins 32. Upward movement of the rod relative to, the hub is prevented by means of a manually releasable latch comprising a pair of hooks 31located on opposite sides or the rod and pivotally connected at their upper ends to the head In by means of a pin 38. This pin may be held in place by the upper end of the rod l2. The rear portions of these hooks 31 are joined bya bar or cross piece 39 from the center of which a handle 40 projects rearwardly. By engaging the rod l2,

the cross piece 39 prevents the hooks 31 from swinging forwardly under the influence of the weight of the handle 40 when the stripper is colshown in Fig. 6.

' parent from the above disclosure.

wire will be formed upon the finishing block of a wire-drawing machine, this block preferably hav ing radial lots for the reception of the stripper .legs l9, one suitable construction being disclosed in the patent to Morgan et al. No. 2,247,248,

granted June 24, 1941. Upon completion of the bundle a crane will lower the stripper in its collapsed condition into the interior of theb-undle,

the stripper legs 19 entering the slots in the block and spreading outwardly to engage the bundle, while the rod l2 slides downwardly through the hub 14 until the ring 35 strikes the top of the hub. During this movement the cam surfaces 45 of the hooks 3'! will engage the lugs '43 and cause the hooks. to swing rearwardly until the stripper has been fully expanded, whereupon the weight of the handle 40 will swing the hooks forwardly again beneath the lugs to prevent collapse of the stripper. The stripper, with the bundle thereon, will now be lifted from the block by means of the crane and transported to aplace of deposit. The operator will then lift the handle Mland swing the hooks 3T rearwardlyout of engagement with the lugs 43, allowingthe head. [4 to drop. The links 283| will swing the legs i9 inwardly to release the'bundle and allow it to fall from the stripper. Since the handle 40 does not drop with the head 14, the: operator will not be subjected to any sudden jerk when the latch is released. The arms I5, with their novel inverted V cross-section, are peculiarl adapted to withstand the heavy loads resulting from the weight of the wire bundles. ened forks l8 hold the legs 19 in proper alignment and restrict their movements to radial planes.

' Having thus described our invention, what we claim as new and desire to secure by Letters Patent is:

1. A collapsible wire block stripper comprising ahead adapted to be suspended from its upper end, a vertical rod depending from the head, a hub vertically slidable on the rod and provided with radially extending arms, legs depending from the arms, a spider on the lower endzof the The vertically widrod, links connecting the spider with the legs, a pair oflugs on the hub at opposite sides of the rod, two hooks pivotally secured to opposite sides of the head and depending therefrom to engage the lugs and prevent the hub from slidingdownwardly to collapse the stripper, a bar connecting the hooks at the rear side of the rod, and a hanclle projecting rearwardly from the harm release the'hooks, the Weight of the handle tending to swing the hooks forwardly, and the bar being so located as to limit this forward swinging by en- 7 gaging the rod, when the stripper is collapsed, to

" position the hooks properly for automatic engagement with the lugs as the stripper is ex- T panded again.

from thearms, a spider on the lower end of the rod, links connecting the spider with the legs, the hub having two slots therein on opposite sides of the rod, a lugbridging each slot, two hooks pivotally secured to opposite sides of the head and depending. therefrom into the slots to engage the lugs and prevent the hub from sliding downwardly to collapse the stripper, and a handle connected to the hooks to release the same.

3. A collapsible wir block stripper comprising an upright element adapted to be suspended from its upper end, a hub vertically slidable on said element and provided with radially extending arms of inverted V form in cross-section, legs depending from the outer ends of the arms, a

spider on the lower end of the rod, links connecting the spider with the legs, and a manually releasable latch arranged to prevent the hub from sliding downwardly to collapse the stripper.

4. A collapsible wire block stripper comprising an upright element adapted to be suspended from its upper end, a hub vertically slidable on said element and provided with radially extending arms, legs dependingirom the arms, a spider on the lower end of the rod and provided with radially extending forks, a U-shaped clevis straddling each leg and pivotally connected thereto, an. eye bolt threaded into each clevis, each eye bolt having a head located within one of v the forks and pivotally connectedthereto, and

a manually releasable latch arranged to prevent the hubfrom sliding downwardly to collapse the stripper. WELD MogGAN.

CLARKE D WESSON.

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