US743640A - Knockdown ladder. - Google Patents

Knockdown ladder. Download PDF

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Publication number
US743640A
US743640A US14210803A US1903142108A US743640A US 743640 A US743640 A US 743640A US 14210803 A US14210803 A US 14210803A US 1903142108 A US1903142108 A US 1903142108A US 743640 A US743640 A US 743640A
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United States
Prior art keywords
ladder
knockdown
ferrule
view
harmon
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
US14210803A
Inventor
Elmer L Harmon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US14210803A priority Critical patent/US743640A/en
Application granted granted Critical
Publication of US743640A publication Critical patent/US743640A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B9/00—Connections of rods or tubular parts to flat surfaces at an angle
    • F16B9/05—Connections of rods or tubular parts to flat surfaces at an angle by way of an intermediate member
    • F16B9/056—Connections of rods or tubular parts to flat surfaces at an angle by way of an intermediate member the intermediate member extending through the flat surface; the rod or tubular part extending through the flat surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B9/00—Connections of rods or tubular parts to flat surfaces at an angle
    • F16B9/05—Connections of rods or tubular parts to flat surfaces at an angle by way of an intermediate member
    • F16B9/052—Connections of rods or tubular parts to flat surfaces at an angle by way of an intermediate member the intermediate member having a radial flange secured to the flat surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B9/00—Connections of rods or tubular parts to flat surfaces at an angle
    • F16B9/05—Connections of rods or tubular parts to flat surfaces at an angle by way of an intermediate member
    • F16B9/054—Connections of rods or tubular parts to flat surfaces at an angle by way of an intermediate member the intermediate member being threaded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/50—Flanged connections
    • F16B2200/503—Flanged connections the flange being separate from the elements to be connected

Definitions

  • This invention relates to an improved ladder, and more particularly to that class of ladders known in the art as stage ladders for painters use, 850.; and it consists in the certain details of construction and combination of parts, as will be fully described hereinafter.
  • Figure 1 is a front elevation of my improved ladder, the same being constructed and arranged in accordance with my invention.
  • Fig. 2 is a side elevation of the same.
  • Fig. 3 is an enlarged sectional plan View taken through one of the rungs of the ladder.
  • Fig. 4 is a perspective view of one of the ferrules used in connection with the head of the tie-bolt,
  • Fig. 5 is a perspective View of the opposite ferrule adapted to connect with the threaded end of the tiebolt.
  • Fig. 6 is a perspective view of a portion of one of the hollow rungs, showing the shoulder formed thereon.
  • a ferrule 9 having a head 6 at the one end and a threaded portion 7 at the other, the said threaded portion 7 engaging with sockets 12, forming a part of a ferrule 9 let into the side rails 1 of the ladder.
  • This ferrule consists of a disk 9, having spurs 10 or openings 10, as a means of engagement with the side rails to prevent the ferrule from turning.
  • a somewhat similar ferrule 8, having a tapering socket 13, is provided for the head end of the bolt 6, the said ferrule being best shown at Fig. 4: of the drawings.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)

Description

PATENTED NOV. 10, 1903.
E. L. HARMON. KNOGKDO'WN LADDER.
APPLICATION FILED FEB. 6. 1903.
H0 MODEL.
UNITED STATES Patented November 10, 1903.
PATENT GFFICE.
KNOCKDOWN LADDER.
SPECIFICATION forming part of Letters Patent No; 743,640, dated November 10, 1903.
Application filed February 6, 1903. Serial No. 142,108. (No model.)
To 0,66 whom it may concern.-
Be it known that I, ELMER L. HARMON, a citizen of the United States, residing at Sheridan, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Knockdown Ladders, of which improvement the following is a specification.
This invention relates to an improved ladder, and more particularly to that class of ladders known in the art as stage ladders for painters use, 850.; and it consists in the certain details of construction and combination of parts, as will be fully described hereinafter.
In the accompanying drawings, Figure 1 is a front elevation of my improved ladder, the same being constructed and arranged in accordance with my invention. Fig. 2 is a side elevation of the same. Fig. 3 is an enlarged sectional plan View taken through one of the rungs of the ladder. Fig. 4 is a perspective view of one of the ferrules used in connection with the head of the tie-bolt, Fig. 5 is a perspective View of the opposite ferrule adapted to connect with the threaded end of the tiebolt. Fig. 6 is a perspective view of a portion of one of the hollow rungs, showing the shoulder formed thereon.
To construct a ladder in accordance with my invention, I form from suitable material the side rails l and connect the one with the bolt is passed, the same consisting of a rod 6,
having a head 6 at the one end and a threaded portion 7 at the other, the said threaded portion 7 engaging with sockets 12, forming a part of a ferrule 9 let into the side rails 1 of the ladder. This ferrule consists of a disk 9, having spurs 10 or openings 10, as a means of engagement with the side rails to prevent the ferrule from turning. A somewhat similar ferrule 8, having a tapering socket 13, is provided for the head end of the bolt 6, the said ferrule being best shown at Fig. 4: of the drawings. By this construction and arrangement of a ladder the same may be taken apart and packed in a comparatively small space,
besides being strong, durable, and efficient and of small cost.
Slight modificationsand changes may be made in the details of construction without departing from the spirit of the invention.
Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-
In a ladder, the combination with the side 7 ELMER L. HARMON.
In presence of- JOHN GROETZINGER, M. E. HARRISON.
US14210803A 1903-02-06 1903-02-06 Knockdown ladder. Expired - Lifetime US743640A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14210803A US743640A (en) 1903-02-06 1903-02-06 Knockdown ladder.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US14210803A US743640A (en) 1903-02-06 1903-02-06 Knockdown ladder.

Publications (1)

Publication Number Publication Date
US743640A true US743640A (en) 1903-11-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
US14210803A Expired - Lifetime US743640A (en) 1903-02-06 1903-02-06 Knockdown ladder.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3052315A (en) * 1957-11-25 1962-09-04 Jones Mert Elmer Swinging stage or scaffolding

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3052315A (en) * 1957-11-25 1962-09-04 Jones Mert Elmer Swinging stage or scaffolding

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