US362749A

US362749A - Cornice-brake

Info

Publication number: US362749A
Authority: US
Publication date: 1887-05-10
Anticipated expiration: 1904-05-10

Description

(No Model.)

G. O. KEENE.

CORNIUE BRAKE.

No. 862,749. Patented May 10,1887.-

FIE].

INVENTDR NlTED STATES GEORGE C. KEENE, OF CINCINNATI, OHIO.

CORNlCE-BRAKE.

SPECIFICATION forming part of Letters Patent No. 362,749, dated May 10, 1887.

(No model.)

To all whom it may concern:

Be it known that I, GEORGE C. KEENE, a citizen of the United States, residing at Oineinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvementsin Cornice-Brakes, of which the following is a specification.

My invention relates to certain improvements in machines for bending and shaping sheet metal, or, more particularly speaking, to improvements in the cornice-brake patented by me July 1, 1884., No. 301,128. It has for one of its objects to provide upon the outer end of one of the axial journals ot'the bendingapron or brake proper a segmental gear, keyed thereto and meshing with a drivingpiniou, which is mounted vertically above and provided with radial arms forming operatinghandles, whereby the movementsofsaid apron may be facilitated for heavy work. Another of its objects is to provide upon the outer end of the opposite axial journal of the bendingbrake a quadrant or semicircular plate, adjustably and detachably secured thereto, and having'a curved slot therein concentric to said journal, and adapted to receive the square shank of a bolt, forming an adjustable dog or stop whose head abuts the fastening screwbolts of the stationary beam, whereby the bending-brake may be operated continuously at a certain angle and its range of movement readily limited and changed when required.

Other features of my invention will be fully set forth in the following description of the accompanying drawings, in which- Figure 1 is a perspective view of a cornicebrake embodying my improvements; Fig. 2, a front elevation of the bending-apron detached from its journal-bearings, showing the segmental gear and slotted plate mounted, respectively, upon its opposite axial ends; Fig. 3, a rear elevation of one end of the machine, showing the segmental gear, pinion, and bandled hub for operating the brake in connection with heavy iron; Fig. 4, an elevation of the outer face of the slotted quadrant-plate and the weighted lever for counterbalancing the bendingapron; Fig. 5, a vertical crosssection on the line a: a", Fig. 4; Fig. 6, a detail perspective view of the upper corner of the machine, adjacentto which the slotted quadrant-plate is mounted, showing the fastening screw-bolts,which serve as stops 0r abutments for the dog on said plate; and Fig. 7, a trans verse section of the stationary beam,the sheetclamping beam, and the bending-apron, taken .on line ?1 y of Fig. 1.

A A represent the supporting-legs of the machine; B, the connecting tic-beam, forming part of the sheet clamping apparatus; and O, the bending apron or brake proper, j ournaled at its opposite ends in boxes 0 at the ends of the movable clamping-beam B.

c 0 represent the short axial shafts or journals of the apron one at either end thereof-- the one, 0, having a segmental gear, D, keyed thereto, and the other, 0', having a quadrant or semicircular plate, E, adjustably and detachably secu red thereto by means of ascrew,e.

F represents a pinion mounted upon a stud or short shaft,f, which projects laterally from the upright angular lug G, secured upon the frame leg A, as shown in Fig. 1, or made a part thereof, as shown in Fig. 3, either of the latter forms of lug being optional.

Pinion F meshes with the segmental gear D, mounted below it, and is rigidly connected with a hub, H, which is mounted on said st-udfoutside the pinion, and provided with handles or arms I, whereby the bending-apron is operated.

J and J representa weight and rod, respectively, on the outer end ofjourual c, the lower end of which rod is adj ustably and dctachably secured in the hub j of the quadrant E for their customary use-viz., that of counterbalancing the weight of the bending-apron. e is a curved slot in quadrant E, concentric to its supportingjournal.

E is a bolt with its shank lying within slot 6', its head being on the inside and the fastening-nut on the outside of said quadrant. Ihe shank of bolt E may be made either round or angular; but I prefer the latter form, as it is best adapted to facilitate the setting of the nut in place on thebolt after any adjustment thereof. lhe head 6 of bolt E serves as a detent or dog, which abuts either one of the projecting heads of screws K, or a separate stop on the main frame, (according to the radius of the slot e,-) in the operation of the machine, to hold or catch the bendingapron at any deft nite angle in the operation thereof, and thereby obviate the necessity of making a full stroke of said apron from a vertical to a horizontal position in making each bend in a continuous number of bends in theiron on one hand, and preventing the apron moving too far or beyond the required angleon the other hand.

The position of the detent or dog E in the slot 0 determines the action of the bendingbrake, whether it be for limiting said brake to bend the iron at a certain angle or catching the brake on its downward or retreating 1novement.

The quadrant is adjustably secured on the shaft c by screw e, so that it can be readily attached or detached, as occasion may re.

quire.

In the operation of my machine the sheet is placed between the stationary or tie beam B and the movable beam B, and tightly clamped in the desired position by means of the foot treadle mechanism composed of the vertical bars I) b, shaft 1), and treadle-levers b b", and released by the handled lifting-rods If, as fully shown in Fig. 1, and described and claimed in my said former Letters Patent.

I claim 1. In a cornice-brake, the combination,with the journal 0" of the bending-apron, of a quadrant or plate, E, suitably mounted thereon, and provided with a curved slot, en, receiving an adjustable stop or'bolt, E, which engages the head of either of the screws K or other suitable obstruction on the main frame, Whereby the sheet of metal to be bent may be operated upon by saidbending-apron continuously at any given angle, or the range of movement of said apron limitedand readily altered, substantially as and for the purpose herein set forth.

2. In a cornice-brake, the combination,with the bending apron G, of a gear -Wheel, D, mounted upon its journal 0, pinion F, and handled hub H I at one end thereof, and slotted quadrant E e e, mounted upon its journal 0", and the adjustable detent or stop E at its opposite end, constructed, arranged, and adapted to operate in connection with the bolt-heads K or other suitable abutment 011 the main frame of the machine, substantially as herein set forth.

In testimony of which invention I hereunto set my hand.

GEORGE O. KEENE. \Vitnesses:

J OHN E. J oNEs, JOHN ADAM.