US1575208A - Metal ladder - Google Patents

Metal ladder Download PDF

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Publication number
US1575208A
US1575208A US559256A US55925622A US1575208A US 1575208 A US1575208 A US 1575208A US 559256 A US559256 A US 559256A US 55925622 A US55925622 A US 55925622A US 1575208 A US1575208 A US 1575208A
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United States
Prior art keywords
ladder
rungs
side rails
metal ladder
tie
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
Application number
US559256A
Inventor
Fredrick L Jacobs
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to US559256A priority Critical patent/US1575208A/en
Application granted granted Critical
Publication of US1575208A publication Critical patent/US1575208A/en
Priority to US11358526 priority patent/USRE16403E/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/08—Special construction of longitudinal members, or rungs or other treads
    • E06C7/082—Connections between rungs or treads and longitudinal members
    • E06C7/088—Connections between rungs or treads and longitudinal members with tie rods parallel to the rungs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/33—Transverse rod to spaced plate surfaces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/71—Rod side to plate or side
    • Y10T403/7129—Laterally spaced rods
    • Y10T403/7135—Laterally spaced rods by separable shim or bushing in connector

Definitions

  • FREDRICK L JACOBS, OF DETROIT, MICHIGAN.
  • This invention relates to ladders and more particularly relates to ladders of metallic construction.
  • the invention contemplates the use of metal tubing to form both the rungs and side rails, and the provision of tie rods passing through certain of the rungs, and having headed extremities engaging in recesses formed by indenting the side rails, the bosses formed by the indentations being utilized to support and reinforce the rungs by entering the ends thereof.
  • Fig. l is a front view of the improved ladder.
  • Fig. 2 is an enlarged longitudinal section of a portion of the ladder.
  • F ig. 3 is a cross section on a plane intersecting one of the rungs.
  • the reference character 1 designates the uprights or side rails, and 2 the rungs of the ladder, said parts being formed of steel tubing, preferably seamless. It is preferred to employ rungs of circular cross section and side rails of a cross section elongated transversely of the rungs. As shown, the front and rear faces of the side rails are rounded, while the inner and outer faces thereof are flat. Thus the side rails present smooth continuous surfaces for engagement by the hands of a person using the ladder. Th-e rungs 2 are passed snugly through openings in the inner wall of the side rails and abut Vinteriorly against the outer walls thereof. Through certain of said rungs, for example alternate ones, tie
  • rods 3 are passed, said rods having terminal heads 4, one of which may be a nut, clamping against the outer faces of the side rails. It is undesirable to so expose said nuts that they may encounter the hands of a person using the ladder.
  • the invention avoids such exposure by indenting the outer walls of the side rails in registration with such of the rungs as enclose tie rods, and locating the heads 4 within the indentations 5. Such location of said heads not only avoids obstructing the exterior faces of the side rails but to some extent houses said heads within the side rails so as to afford some protection against moisture and consequent corrosion.
  • the interior bosses G which are produced by the indentations 5, are utilized to reinforce the extremities of the runes, said bosses being proportioned to snugly fit into said extremities.
  • the load upon any of the rungs enclosing the tie rods is distributed to both the inner and outer walls of the side rails.
  • the described location of lthe tie members within certain of the rungs ' is further advantageous in that concealment of the tie members is thus effected, so that the latter detract nothing from the appearance of the ladder. Also this location prevents improper use of the tie members as foot rests. It is a desirable feat-ure of the describedconstruction that it permits of a very rapid and secure assembly of the parts and produces a comparatively light and strong ladder having a flush an-d smooth exterior.
  • a tubular side rail having flattened opposite wall portions with an opening in one of said portions and a boss in the other extending toward said opening and forming an indentation exteriorly of the rail, a tubular rung passing through said opening and embracing said boss, and a tie member extending Within the rung and having an enlargement within said indentation.

Description

"mhz'nsa,
METAL LADDER led May s',- 1922 Patented Mar. 2, 1926.
UNITED STATES PATENT OFFICE.
FREDRICK L. JACOBS, OF DETROIT, MICHIGAN.
METAL LADDER.
Application filed 'May 8, 1922. Serial N'o. 559,256.
To all 'wh-0m t may concern:
Be it known that I, Fnnnnron L. JACOBS, a citizen of the United States, residing at Detroit, in the county of Tayne and State of Michigan, have invented a new and useful Metal Ladder, of which the following is a specification.
This invention relates to ladders and more particularly relates to ladders of metallic construction. Y
It is the object of the invention to provide a metal ladder of very light yet strong construction, having a novel structural formation and union between its rungs and the -tie connections between the uprights or side rails of the ladder.
In attaining this object, the invention contemplates the use of metal tubing to form both the rungs and side rails, and the provision of tie rods passing through certain of the rungs, and having headed extremities engaging in recesses formed by indenting the side rails, the bosses formed by the indentations being utilized to support and reinforce the rungs by entering the ends thereof.
In the accompanying drawing, Y
Fig. l is a front view of the improved ladder.
Fig. 2 is an enlarged longitudinal section of a portion of the ladder.
F ig. 3 is a cross section on a plane intersecting one of the rungs.
In these views the reference character 1 designates the uprights or side rails, and 2 the rungs of the ladder, said parts being formed of steel tubing, preferably seamless. It is preferred to employ rungs of circular cross section and side rails of a cross section elongated transversely of the rungs. As shown, the front and rear faces of the side rails are rounded, while the inner and outer faces thereof are flat. Thus the side rails present smooth continuous surfaces for engagement by the hands of a person using the ladder. Th-e rungs 2 are passed snugly through openings in the inner wall of the side rails and abut Vinteriorly against the outer walls thereof. Through certain of said rungs, for example alternate ones, tie
rods 3 are passed, said rods having terminal heads 4, one of which may be a nut, clamping against the outer faces of the side rails. It is undesirable to so expose said nuts that they may encounter the hands of a person using the ladder. The invention avoids such exposure by indenting the outer walls of the side rails in registration with such of the rungs as enclose tie rods, and locating the heads 4 within the indentations 5. Such location of said heads not only avoids obstructing the exterior faces of the side rails but to some extent houses said heads within the side rails so as to afford some protection against moisture and consequent corrosion.
The interior bosses G, which are produced by the indentations 5, are utilized to reinforce the extremities of the runes, said bosses being proportioned to snugly fit into said extremities. Thus the load upon any of the rungs enclosing the tie rods is distributed to both the inner and outer walls of the side rails.
The described location of lthe tie members within certain of the rungs 'is further advantageous in that concealment of the tie members is thus effected, so that the latter detract nothing from the appearance of the ladder. Also this location prevents improper use of the tie members as foot rests. It is a desirable feat-ure of the describedconstruction that it permits of a very rapid and secure assembly of the parts and produces a comparatively light and strong ladder having a flush an-d smooth exterior.
That I claim is:
In a ladder, a tubular side rail having flattened opposite wall portions with an opening in one of said portions and a boss in the other extending toward said opening and forming an indentation exteriorly of the rail, a tubular rung passing through said opening and embracing said boss, and a tie member extending Within the rung and having an enlargement within said indentation.
In testimony whereof I sign this specification.
FREDRICK L. JACOBS.
US559256A 1922-05-08 1922-05-08 Metal ladder Expired - Lifetime US1575208A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US559256A US1575208A (en) 1922-05-08 1922-05-08 Metal ladder
US11358526 USRE16403E (en) 1922-05-08 1926-06-03 Metal ladder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US559256A US1575208A (en) 1922-05-08 1922-05-08 Metal ladder

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US1575208A true US1575208A (en) 1926-03-02

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2594561A (en) * 1948-06-03 1952-04-29 Patent Scaffolding Co Inc Ladder of lightweight metals
US2655345A (en) * 1948-04-22 1953-10-13 Philip C Lindman Ornamental ironwork structure
US2844292A (en) * 1955-04-21 1958-07-22 Howard B Rich Stepladders
US2885132A (en) * 1954-05-26 1959-05-05 Putnam Rolling Ladder Company Ladder
US3142356A (en) * 1963-08-02 1964-07-28 Howard B Rich Inc Ladder construction
DE1213970B (en) * 1957-09-04 1966-04-07 Ernst Nofen Broncewarenfabrik Light metal rung ladder
US4904151A (en) * 1988-07-07 1990-02-27 Deere & Company Loader lift arm structure
US6406077B2 (en) 2000-05-11 2002-06-18 Shape Corporation Tube with extruded flanges holding wall-reinforcing insert
DE102015004879A1 (en) * 2015-04-16 2016-10-20 Rolf Hemkendreis Modular construction system for the production of scaffoldings, racks, ladders and ladder frames made of metal

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2655345A (en) * 1948-04-22 1953-10-13 Philip C Lindman Ornamental ironwork structure
US2594561A (en) * 1948-06-03 1952-04-29 Patent Scaffolding Co Inc Ladder of lightweight metals
US2885132A (en) * 1954-05-26 1959-05-05 Putnam Rolling Ladder Company Ladder
US2844292A (en) * 1955-04-21 1958-07-22 Howard B Rich Stepladders
DE1213970B (en) * 1957-09-04 1966-04-07 Ernst Nofen Broncewarenfabrik Light metal rung ladder
US3142356A (en) * 1963-08-02 1964-07-28 Howard B Rich Inc Ladder construction
US4904151A (en) * 1988-07-07 1990-02-27 Deere & Company Loader lift arm structure
US6406077B2 (en) 2000-05-11 2002-06-18 Shape Corporation Tube with extruded flanges holding wall-reinforcing insert
DE102015004879A1 (en) * 2015-04-16 2016-10-20 Rolf Hemkendreis Modular construction system for the production of scaffoldings, racks, ladders and ladder frames made of metal

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