US3323660A - Lattice boom construction - Google Patents
Lattice boom construction Download PDFInfo
- Publication number
- US3323660A US3323660A US488872A US48887265A US3323660A US 3323660 A US3323660 A US 3323660A US 488872 A US488872 A US 488872A US 48887265 A US48887265 A US 48887265A US 3323660 A US3323660 A US 3323660A
- Authority
- US
- United States
- Prior art keywords
- chords
- chord
- connector
- connectors
- boom
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
Definitions
- the present invention provides a boom construction that strengthens the chords instead of weakening them and that facilitates securing of the lattice members to the chords while introducing a minimum of weld stresses into the chords.
- the invention is applicable to booms having angle iron chords with flanges or legs at right angles to each other and also to booms having tubular chords.
- angle iron chords When angle iron chords are employed the invention employs a connector that fits into the bosom of the chord and is welded to both legs, thus adding support to the legs and strengthening the chords.
- tubular chords When tubular chords are employed the invention employs a partial sleeve-like connector that fits approximately a 180 circumferential portion of the chord and strengthens the same.
- the connectors are welded to the chords and the latter may then be stress relieved to assure freedom from undesirable locked in welding stress. Thereafter the lattice members are welded to the connectors of spaced chords to complete the boom assembly.
- the welds for the lattice members are desirably spaced from the chords so as not to directly stress the latter. Thus the predetermined relation and position of the chords can be maintained without distortion.
- the construction provides a type of welded joint that makes possible the joining of the members without losing the effect of the heat treatment therein.
- FIGURE 1 is a top plan view of a boom segment employing angle iron chords and incorporating the connector of the invention
- FIG. 2 is a side elevation of the boom segment of FIG. 1;
- FIG. 3 is an enlarged transverse section taken on line 3-3 of FIG. 1;
- FIG. 4 is a detail section taken transversely of a chord on line 4--4 of FIG. 2;
- FIG. 5 is a detail section taken on line 5-5 of FIG. 4 and showing a connector with its attachment to the chord and to the ends of a plurality of lattice members;
- FIG. 6 is a perspective view of a portion of a chord with a connector secured thereto and adapted to receive the ends of three lattice members;
- FIG. 7 is a view similar to FIG. 6 and showing a connector adapted to receive the ends of six lattice members;
- FIG. 8 is a detail section showing an end connector;
- FIG. 9 is a detail plan view of an end connection at one corner of two beam sections.
- FIG. 10 is a detail enlarged transverse section of one type of end connection taken on line 1010 of FIG. 1;
- FIG. 11 is a detail enlarged transverse section of the other type of end connection taken on line 1111 of FIG. 1;
- FIG. 12 is a perspective view of a portion of a boom segment made up of tubular chords.
- the boom illustrated is constructed of sections joined end to end and which may vary in dimensions according to their position in the boom. Sections disposed near the base or in the central body region of the boom may have their chords substantially parallel. Sections disposed near the outer end of the boom will generally be tapered to a smaller cross sectional dimension toward the outer end, by disposing the chords at a predetermined angle to each other.
- the boom section 1 is made up of four generally parallel angle iron chords 2, 3, 4 and 5, respectively, and a plurality of cross lattice or lac ng members and diagonal or lacing members more specifically identified hereinafter.
- the lattice members converge adjacent the chords to form a series of planular transverse strengthening zones, generally indicated in FIGURE 1 as zones A, B, C, D, E, F and G, respectively.
- a connector is employed to secure the lattice members to a corresponding chord.
- two types of connectors 6 and 7 are employed as individually illustrated respectively in FIGS. 10 and 11.
- two types of intermediate connectors 8 and 9 are employed as individually illustrated in FIGS. 6 and 7.
- chords 2 and 4 have the following connectors secured thereto in the order named starting with zone A and ending with zone G: connectors 6, 9, 8, 9, 8, 9 and 6.
- chords 3 and 5 have the following connectors secured thereto in the order named starting with zone A and ending with zone G: connectors '7, 8, 9, 8, 9, 8, and 7.
- Each intermediate connector as illustrated in FIGS. 47, inclusive, is a casting adapted to fit in the bosom of a chord at a selected zone.
- the connector is a convex member having its opposite edges welded as at 10 and 11 to the corresponding legs 12 and 13 of the chord.
- the connectors bridge the angle of the chord and support the legs relative to each other, thereby strengthening the chord at each zone.
- Each connector 6 and 7 is adapted to receive the end of two lattice members 14 and 15 disposed at right angles to each other and in the transverse plane of the zone.
- Lattice member 14 extends from connector 6 on chord 5.
- Lattice member 15 extends at right angles to the corresponding lattice member 14 and from connector 6 on chord 2 to connector 7 on chord 5 and a similar lattice member 15 extends from connector 6 on chord 4 to connector 7 on chord 3.
- the two lattice members 14 and the two lattice members 15 at each end of section 1 form a rectangular outline corresponding to the rectangular cross section of the boom section 1.
- each connector '7 Associated witheach connector '7 is an angular connector 16 which receives and secures two diagonal lattice members 17 and 18 extending at an angle toward a corresponding connector 9 on an adjacent chord, i.e., the member 17 extending from connector 16 on chord 3 to connector 9 on chord 2 and member 18? extending from connector 16 on chord 3 to connector 9 on chord 4. Similar lattice members 17 and 18 join a connector 16 associated with connector 7 on chord to the respective connectors 9 on chords 4 and 2.
- the connectors 6 and 7 at each end of the boom section 1 have means for securing the section to the end of an adjacent similar section.
- Various means may be employed for this purpose, that shown comprising one or more cars 19 on the connectors and disposed to fit adjacent corresponding ears on the next adjacent section.
- the connectors at one end of boom section 1 have one ear 19 while the connectors at the opposite end of boom section 1 have two ears 19 spaced apart to receive the single ear of a corresponding end connector of an aligned boom section, as shown in FIG. 9.
- Each ear 19 has a bore 20 therethrough for receiving a pin 21 and which passes through the aligned bores of adjacent ears when two similar sections are aligned for securing the same together.
- the end connectors 7 provide an additional diagonal socket 22 for receiving a diagonal lattice member 23 which extends laterally in a transverse plane normal to boom section 1 and between the connector 7 on chord 3 in zone A and the connector 7 on chord 5 in the same zone.
- the lattice member 23 may extend between the connectors 7 on the same chords 2 and 4.
- zone B as illustrated in FIGS. 1 and 2, a connector 9 is welded to each of chords 2 and 4, and a connector 8 is welded to each of chords 3 and 5.
- zones D and F zone D being additionally illustrated in FIG. 3.
- zone C as illustrated in FIGS. 1 and 2, a connector 9 is welded to each of chords 3 and 5, and a connector 8 is welded to each of chords 2 and 4. The same is true at zone E.
- Connector 9 is specifically shown in FIG. 7 and has six holes or fittings for receiving the ends of tubular lattice members. As shown there are three circular openings or fittings on a side, the central socket or fitting 24 being generally perpendicular or normal to the opposite leg of the chord, and the two end sockets or fittings 25 and 26 on each side being disposed at suitable angles to receive diagonal lattice members as shown in FIGS. 4 and 5.
- one of the fittings 25 of connector 9 on chord 2 receives diagonal lattice member 17 from the connector 16 on chord 3, and as shown in FIG. 2, one of the fittings 25 of connector 8 on chord 4 receives diagonal lattice member 18 from the connector 16 on chord 3.
- the other fitting 25 of connector 9 on chord 2 receives a diagonal lattice member 18 from the connector 16 on chord 5 and the other fiitting 25 of connector 9 on chord 4 receives diagonal lattice member 17 from the connector 16 on chord 5.
- each connector 9 on chords 2 and 4 at zone B secure diagonal lattice members 27 and 28, respectively, which extend to the corresponding fittings 25 of connectors 9 on chords 3 and 5 at zone C.
- the fittings 26 of each connector 9 at each of the zones secure diagonal lattice members 27 and 28, respectively, extending to the fittings 25 of corresponding connectors 9 at the next succeeding zone.
- each conector 9 secure lattice members 29 and 30 which extend at right angles to each other to corresponding fittings 31 in connectors 8 on adjacent chords.
- Connectors 8 are illustrated in FIG. 6 and each has the two sockets or fittings 31 disposed at right angles to each other and generally perpendicular to the opposite leg of the chord.
- each connector 8 has an intermediate diagonal fitting 32, as shown in FIGS. 3 and 6 and which secures a strut 33 that extends diagonally of the section, i.e. from one chord to the chord diagonally opposite thereto,
- chord 3 has a fitting 32 which secures one end of the diagonal strut 33
- the similar connector 8 on chord 5 has a fitting 32 which secures the other end of the diagonal strut 33. Since chords 3 and 5 are diagonally opposite in the boom structure struts 33 serve to brace the structure diagonally. Similar struts 33 join the diagonally opposite connectors 8 at zones B and F. At zones C and E struts 34 join the corresponding connectors 8 and extend diagonally between chords 2 and 4.
- the four chords are generally positioned in a fixture and the lattice members and struts are individually positioned and welded in place.
- lattice members and struts In positioning lattice members and struts one end is first inserted into a socket or fitting far enough to permit the member or strut to be aligned with the opposite fitting, whereupon a slight retraction of the member or strut will result in both ends of the same being confined in the corresponding fittings. Thereafter a fillet Weld 35 around the tubular member or strut will secure it to the fitting at each end.
- welds 35 are generally spaced from welds 10 and 11 and from the chords so that stresses resulting from welds 35 are not concentrated in the chords and do not weaken them.
- FIG. 12 illustrates an embodiment of the invention employing tubular chords 36 and in which the connectors 37 are half sleeves thereon having the desired projecting sockets or fittings 38 for securing the lattice members and struts.
- the half sleeves 37 greatly strengthen and support the chords at the junction zone for the lattice members.
- Half sleeves 37 are welded to the chords by fillet welds 29 along the peripheral edges of the half sleeves.
- chord or lattice member By employing fillet welds with the chord or lattice member extending beyond the weld in both directions, it is possible to keep the heat input low enough during the welding process to effect a quenching of the weld by the mass of metal adjacent to it without removing the desired high strength of a previously heat treated chord or lattice member.
- a connector for use in connecting lacing members to angle iron chords in a boom framework, a connector comprising a unitary body shaped to closely fit in the bosom of a chord and to be welded thereto, said unitary body having a plurality of openings therein remote from the chord welds and adapted to receive and secure the ends of boom lacing members.
- a boom having a plurality of longitudinally extending angle iron chords, a plurality of connectors fixedly secured in the bosom of each of said chords, each of said connectors having a plurality of openings therein, and lacing members disposed with their ends secured in said openings and extending between connectors on different chords.
- a boom having a plurality of longitudinally extending angle iron chords, a plurality of connectors fixedly secured in the bosom of each of said chords, each of said connectors having a plurality of openings therein which are disposed in the same plane, at least some of said connectors having an additional plurality of openings disposed in a plane which intersects said first-named plane, each said opening being aligned with a corresponding opening in a connector on a different chord, and lacing members disposed with their ends secured in corresponding aligned openings and extending between connectors on different chords.
- a boom made up of sections, each comprising a plurality of longitudinally extending chords, a plurality of connectors spaced longitudinally of each chord and secured thereto by welds, each said chord and the connectors welded thereto being stress relieved as a unit, a plurality of lattice members joining connectors on adjacent chords to space the chords from each other, and welds securing said lattice members to said connectors and generally remote from said first named welds to facilitate replacement of a lattice member without effecting the characteristics of the chords to which it is secured.
- a boom made up of sections, each comprising a plurality of longitudinally extending angle iron chords, a plurality of connectors spaced longitudinally of each chord and secured in the bosom thereof by welds to the adjacent legs of the chord, each said chord and the connectors Welded thereto being stress relieved as a unit, a plurality of lattice members joining connectors on adjacent chords to space the chords from each other, and welds securing said lattice members to said connectors and generally remote from said first named Welds to facilitate replacement of a lattice member Without effecting the characteristics of the chords to which it is secured.
- a boom made up of sections, each comprising a plurality of longitudinally extending tubular chords, a plurality of partial sleeve-like connectors spaced longitudinally of each chord and secured thereto by welds along the periphery of the connectors, each said chord and the connectors welded thereto being stress relieved as a unit, a plurality of lattice members joining said connectors on adjacent chords to space the chords from each other, and welds securing said lattice members to said connectors and generally remote from said first named welds to facilitate replacement of a lattice member without effecting the characteristics of the chords to which it is secured.
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- Mechanical Engineering (AREA)
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Description
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US488872A US3323660A (en) | 1965-09-21 | 1965-09-21 | Lattice boom construction |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US488872A US3323660A (en) | 1965-09-21 | 1965-09-21 | Lattice boom construction |
Publications (1)
Publication Number | Publication Date |
---|---|
US3323660A true US3323660A (en) | 1967-06-06 |
Family
ID=23941463
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US488872A Expired - Lifetime US3323660A (en) | 1965-09-21 | 1965-09-21 | Lattice boom construction |
Country Status (1)
Country | Link |
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US (1) | US3323660A (en) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3445004A (en) * | 1967-02-01 | 1969-05-20 | Bucyrus Erie Co | Telescopic cantilevered boom |
US3887061A (en) * | 1972-08-03 | 1975-06-03 | Henry R Hopkins | Portable modular materials distribution system |
US4003475A (en) * | 1974-11-27 | 1977-01-18 | Fmc Corporation | Crane boom lattice and hoist line protection assembly |
US4214665A (en) * | 1978-06-01 | 1980-07-29 | Newman Timothy L | Truck mounted railroad crane boom section |
US4863044A (en) * | 1987-12-30 | 1989-09-05 | Neil F. Lampson, Inc. | Latticework construction for cranes |
EP0376417A1 (en) * | 1988-12-19 | 1990-07-04 | MANNESMANN Aktiengesellschaft | Multiple pin connection |
US5199586A (en) * | 1991-07-25 | 1993-04-06 | The Manitowoc Company, Inc. | Quick-connect sectional boom members for cranes and the like |
US5842587A (en) * | 1996-03-04 | 1998-12-01 | Manitowoc Crane Group, Inc. | Offsetting link assembly for folding luffing jib |
WO1998054080A1 (en) * | 1997-05-30 | 1998-12-03 | Mammoet Decalift International B.V. | Hoisting device for big loads |
US6213318B1 (en) | 1999-03-01 | 2001-04-10 | Manitowoc Crane Group, Inc. | Rotatable connection system for crane boom sections |
US20110114587A1 (en) * | 2008-04-25 | 2011-05-19 | Itrec B.V. | Hoisting crane |
FR2969249A1 (en) * | 2010-12-21 | 2012-06-22 | Peugeot Citroen Automobiles Sa | Device for connecting first and second tubes for production of chassis of front/rear axle of vehicle, where first tube is joined by one of its ends on second tube, comprises interface component comprising middle part and two side parts |
US20150030378A1 (en) * | 2013-07-28 | 2015-01-29 | BMT WBM Canada Consulting Engineers Inc. | Structural connectors for dragline boom and mast tubular clusters and methods for repair, reinforcement and life extension of dragline booms and masts |
US20190242128A1 (en) * | 2017-09-13 | 2019-08-08 | Xtreme Structures & Fabrication, LLC | Modular Truss |
US20210214195A1 (en) * | 2018-05-18 | 2021-07-15 | Kobelco Construction Machinery Co., Ltd. | Lattice structure, lattice structure coupling body, work machine, and connector |
EP3960689A4 (en) * | 2019-07-04 | 2022-08-03 | Kobelco Construction Machinery Co., Ltd. | Lattice structure and work machine |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1760955A (en) * | 1925-12-24 | 1930-06-03 | Linde Air Prod Co | Joint for structural shapes and method of making the same |
US2149844A (en) * | 1935-03-07 | 1939-03-07 | Union Carbide & Carbon Corp | Tubular structure embodying welded joint and method of making the same |
US2219599A (en) * | 1938-10-01 | 1940-10-29 | Vincent S Penote | Method of joining intersecting tubular members |
US3021014A (en) * | 1959-01-19 | 1962-02-13 | Link Belt Speeder Corp | Crane boom structure |
-
1965
- 1965-09-21 US US488872A patent/US3323660A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1760955A (en) * | 1925-12-24 | 1930-06-03 | Linde Air Prod Co | Joint for structural shapes and method of making the same |
US2149844A (en) * | 1935-03-07 | 1939-03-07 | Union Carbide & Carbon Corp | Tubular structure embodying welded joint and method of making the same |
US2219599A (en) * | 1938-10-01 | 1940-10-29 | Vincent S Penote | Method of joining intersecting tubular members |
US3021014A (en) * | 1959-01-19 | 1962-02-13 | Link Belt Speeder Corp | Crane boom structure |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3445004A (en) * | 1967-02-01 | 1969-05-20 | Bucyrus Erie Co | Telescopic cantilevered boom |
US3887061A (en) * | 1972-08-03 | 1975-06-03 | Henry R Hopkins | Portable modular materials distribution system |
US4003475A (en) * | 1974-11-27 | 1977-01-18 | Fmc Corporation | Crane boom lattice and hoist line protection assembly |
US4214665A (en) * | 1978-06-01 | 1980-07-29 | Newman Timothy L | Truck mounted railroad crane boom section |
US4863044A (en) * | 1987-12-30 | 1989-09-05 | Neil F. Lampson, Inc. | Latticework construction for cranes |
EP0376417A1 (en) * | 1988-12-19 | 1990-07-04 | MANNESMANN Aktiengesellschaft | Multiple pin connection |
US5082128A (en) * | 1988-12-19 | 1992-01-21 | Mannesmann Aktiengesellschaft | Crane having a multi-section boom |
US5199586A (en) * | 1991-07-25 | 1993-04-06 | The Manitowoc Company, Inc. | Quick-connect sectional boom members for cranes and the like |
US5842587A (en) * | 1996-03-04 | 1998-12-01 | Manitowoc Crane Group, Inc. | Offsetting link assembly for folding luffing jib |
WO1998054080A1 (en) * | 1997-05-30 | 1998-12-03 | Mammoet Decalift International B.V. | Hoisting device for big loads |
US6523320B2 (en) | 1997-05-30 | 2003-02-25 | Mammoet Europe B.V. | Hoisting device for big loads |
US6213318B1 (en) | 1999-03-01 | 2001-04-10 | Manitowoc Crane Group, Inc. | Rotatable connection system for crane boom sections |
US20110114587A1 (en) * | 2008-04-25 | 2011-05-19 | Itrec B.V. | Hoisting crane |
US8919586B2 (en) * | 2008-04-25 | 2014-12-30 | Itrec B.V. | Hoisting crane with hybrid portions |
FR2969249A1 (en) * | 2010-12-21 | 2012-06-22 | Peugeot Citroen Automobiles Sa | Device for connecting first and second tubes for production of chassis of front/rear axle of vehicle, where first tube is joined by one of its ends on second tube, comprises interface component comprising middle part and two side parts |
US20150030378A1 (en) * | 2013-07-28 | 2015-01-29 | BMT WBM Canada Consulting Engineers Inc. | Structural connectors for dragline boom and mast tubular clusters and methods for repair, reinforcement and life extension of dragline booms and masts |
AU2014204559B2 (en) * | 2013-07-28 | 2018-07-12 | BMT WBM Canada Consulting Engineers Inc. | Structural connectors for dragline boom and mast tubular clusters and method for repair, reinforcement and life extension of dragline booms and masts |
US10100489B2 (en) * | 2013-07-28 | 2018-10-16 | BMT WBM Canada Consulting Engineers Inc. | Structural connectors for dragline boom and mast tubular clusters and methods for repair, reinforcement and life extension of dragline booms and masts |
US20190242128A1 (en) * | 2017-09-13 | 2019-08-08 | Xtreme Structures & Fabrication, LLC | Modular Truss |
US20210214195A1 (en) * | 2018-05-18 | 2021-07-15 | Kobelco Construction Machinery Co., Ltd. | Lattice structure, lattice structure coupling body, work machine, and connector |
US11787672B2 (en) * | 2018-05-18 | 2023-10-17 | Kobelco Construction Machinery Co., Ltd. | Lattice structure, lattice structure coupling body, work machine, and connector |
EP3960689A4 (en) * | 2019-07-04 | 2022-08-03 | Kobelco Construction Machinery Co., Ltd. | Lattice structure and work machine |
US20220259017A1 (en) * | 2019-07-04 | 2022-08-18 | Kobelco Construction Machinery Co., Ltd. | Lattice structure and work machine |
AU2020300245B2 (en) * | 2019-07-04 | 2023-06-01 | Kobelco Construction Machinery Co., Ltd. | Lattice structure and work machine |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: NORTHWEST ENGINEERING COMPANY, 201 WEST WALNUT ST. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. EFFECTIVE 12/31/73;ASSIGNOR:NORTHWEST ENGINEERING CORPORATION;REEL/FRAME:003855/0501 Effective date: 19810528 |
|
AS | Assignment |
Owner name: PRUDENTIAL INSURANCE COMPANY OF AMERICA, THE, 3050 Free format text: MORTGAGE;ASSIGNOR:NORTHWEST ENGINEERING COMPANY, A CORP. OF DE;REEL/FRAME:003862/0618 Effective date: 19810601 Owner name: FIRST NATIONAL BANK OF CHICAGO, THE, 1 FIRST NATIO Free format text: MORTGAGE;ASSIGNOR:NORTHWEST ENGINEERING COMPANY, A CORP. OF DE;REEL/FRAME:003862/0618 Effective date: 19810601 Owner name: FIRST WISCONSIN NATIONAL BANK OF MILWAUKEE, 777 EA Free format text: MORTGAGE;ASSIGNOR:NORTHWEST ENGINEERING COMPANY, A CORP. OF DE;REEL/FRAME:003862/0618 Effective date: 19810601 Owner name: CONTINENTAL ILLINOIS NATIONAL BANK AND TRUST COMPA Free format text: MORTGAGE;ASSIGNOR:NORTHWEST ENGINEERING COMPANY, A CORP. OF DE;REEL/FRAME:003862/0618 Effective date: 19810601 Owner name: FIRST WISCONSIN BANK OF GREEN BAY, P.O. BOX 1089, Free format text: MORTGAGE;ASSIGNOR:NORTHWEST ENGINEERING COMPANY, A CORP. OF DE;REEL/FRAME:003862/0618 Effective date: 19810601 Owner name: PRUDENTIAL INSURANCE COMPANY OF AMERICA, THE,ILLIN Free format text: MORTGAGE;ASSIGNOR:NORTHWEST ENGINEERING COMPANY;REEL/FRAME:003862/0618 Effective date: 19810601 Owner name: FIRST NATIONAL BANK OF CHICAGO, THE,ILLINOIS Free format text: MORTGAGE;ASSIGNOR:NORTHWEST ENGINEERING COMPANY;REEL/FRAME:003862/0618 Effective date: 19810601 Owner name: FIRST WISCONSIN NATIONAL BANK OF MILWAUKEE,WISCONS Free format text: MORTGAGE;ASSIGNOR:NORTHWEST ENGINEERING COMPANY;REEL/FRAME:003862/0618 Effective date: 19810601 Owner name: CONTINENTAL ILLINOIS NATIONAL BANK AND TRUST COMPA Free format text: MORTGAGE;ASSIGNOR:NORTHWEST ENGINEERING COMPANY;REEL/FRAME:003862/0618 Effective date: 19810601 Owner name: FIRST WISCONSIN BANK OF GREEN BAY,WISCONSIN Free format text: MORTGAGE;ASSIGNOR:NORTHWEST ENGINEERING COMPANY;REEL/FRAME:003862/0618 Effective date: 19810601 |