US1026916A - Bending appliance. - Google Patents

Description

; -W 3% a a J. W. JOHNSON, W. A. BAUERIS, P. J. JENSEN & W. D. LAWSHE.

' BENDING APPLIANCE.

APPLIOATION FILED AUG. 15, 1011.,

1,026,916. I Patented May 21, 1912.

Mom/1M3 COLUMBIA WRAP" C0,. WNW, D- C.

UNITED STAQES PATENT OFFICE.

JOHN \IV. JOHNSON, WILLIAM A. BAUERIS, PETER J. JENSEN, AND WALTER D. LAWSHE, OF SEATTLE, WASHINGTON.

BENDING APPLIANCE.

Specification of Letters Patent.

Patented May 21, 1912.

To all whom it may concern:

Be it known that we, J OIIN 7. J onNsoN, \VILLIAM A. BAUERIS, ln'rnn J. JnNsnN, and \VALTER D. Lawsrrn, citizens of the United States, residing at Seattle, in the county of King and State of \Vashington, have invented certain new and useful Improvements in Bending Appliances, of which the following is a specification.

Our invention relates to bending appliances and has for a primary object the provision of a simplified and improved construction through the medium of which the bending operation can be carried on in an efficient manner.

Other objects will be set forth as our description progresses and those features of construction, arrangements and combinations of parts on which we desire protection, succinctly defined in our annexed claims.

Referring to the accompanying drawing wherein like numerals of reference indicate like parts throughout: Figure 1 is a side elevation, in partial section, of our invention. Fig. 2 is a top plan thereof, a portion of the actuating lever being removed. Fig. 3 is a fragmentary side elevation of the ap' plianee with the bending member held in its elevated or inactive position, and Fig. 4 is a section on line 44 of Fig. 3.

In carrying out our invention, we provide a main frame comprising side bars 1 which are rigidly held in spaced relation by connecting members 2, 2, conveniently formed with apertures, as 3, through which suitable securing bolts, not shown, are passed for securing the device in position for use. Side bars 1 have parallel rear end portions 1 merging into forwardly diverging portions 1", which latter carry the work holding jaws 4, these, as now considered, being formed by bending the side bars to provide hook shaped forward end portions thereto. Arranged between jaws 4 is a reciprocatory bending member 6, the same being guided between vertical standards 7, of frame connecting member 2, and pivotally connected to the short arm 8 of an actuating lever 8, swingingly supported on a shaft 8 mounted in the end portions 1 of bars 1. Bending member 6 consists of a bar formed on its lower face with a series of shoulders or working engaging parts 9, spaced lengthwise of said member for successive engagement with the bar or other article to be bent. Intermediate cngaging parts 9 are cam surfaces 10, the same being inclined forwardly in a downward direction so as to ride over the work during the rear stroke of member 6 and thereby permit of the next engaging part being positioned for engagement with the work to effect further bending of the latter during the next advance movement of member 6.

Reference numeral 11. indicates removable facings for jaws 4, those having relatively long and short side arm extensions 12, adapted to extend on opposite sides of the adjacent jaws. The longer of these arm extensions is formed with an aperture for reception of a screw bolt 13 which is normally removably engaged in the jaw, as shown.

For holding the bending member 6 elevated (see Fig. 3), to thereby permit of the work being properly seated in jaws 4, we provide a rest consisting of a pin 14, adapted to be inserted into suitable apertures provided in the upper end portions of standards 7.

Assuming that a bar, as 15, is positioned in jaws 4, and bending member 6 lowered to bear on the same, as illustrated in Figs. 1 and 2, lever 8 is elevated until the first shoulder 9 is engaged with said bar, and then swung downwardly to advance member 6.

To obtain uniformity in the bending of the work, we propose that lever 8 shall be swung downwardly a predetermined distance during each operation thereof when, for example, its movement can be arrested through contact with'the ground. To vary the extent of bend to the work under such conditions, we provide the removable facings 11 which obviously can be of any suitable thickness.

Rearwardly of jaws 4, side bars 1 are provided with stops t which serve to hold the work against backward movement with the bending member 6.

Having thus described our invention,what we claim as new and desire to secure by Letters Patent of the United States of America, is:

1. A bending appliance comprising a support, spaced work holding jaws on said support, a reciprocatory bending member arranged between said. jaws and provided with a plurality of work engaging parts spaced in the direction of its length for alternative engagement with the work by and during movement of sald member,.and means for reciprocating said member.

2. A bending appliance comprising a support, spaced work holding jaws on said sup port, a reciprocatory bending member arranged between said jaws and provided on its under side with a plurality of engaging parts spaced in the direction of its length for alternative engagement with the work, said member being provided with cam surfaces intermediate said engaging parts for riding on the work during retractive movement of said member, and means for reciprocating said member.

3. A bending appliance comprising a support, spaced work holding jaws on said sup port, a reciprocato-ry bending member arranged between said jaws and provided with a plurality of engaging parts, said engaging parts being spaced lengthwise of said member for alternative engagement with the work, and a lever fulcrumed on said support and connected to said member for reciprocating the same.

4. A bending appliance comprising a support, spaced work holding jaws on said support, a bending member comprising a bar provided on its lower face with a plurality of shoulders and intermediate forwardly and downwardly inclined cam surfaces, said shoulders and cam surfaces being spaced lengthwise of said member, and means for reciprocating said member.

5. A bending appliance comprising a support, spaced work holding jaws on said support, a bending member arranged between said jaws and provided on its under face with a plurality of work engaging parts spaced in the direction of its length, a lever fulcrumed on said frame and pivotally connected with said member for reciprocating the same, vertical standards on said support on opposite sides of said member, and means on said standards for holding said member elevated from said jaws.

6. A bending appliance comprising a support, spaced work holding jaws on said support, a bending member provided with a plurality of work engaging parts spaced in the direction of its length for alternative engagement with the work, and means for reciprocating said bending member between said jaws, said bending member being free for angular movement relatively to the work to thereby permit of the engagement and disengagement of its work engaging parts with respect to the work.

In testimony whereof we aflix our signatures in presence of two witnesses.

JOHN W. J OI-INSON., VILLIAM A. BAUERIS. PETER J. JENSEN. WALTER D. LAWSHE.

Witnesses:

AnLrrA ADAMS, JAMES E. SPROLL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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