US234389A - Ladder - Google Patents

Ladder Download PDF

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US234389A
US234389A US234389DA US234389A US 234389 A US234389 A US 234389A US 234389D A US234389D A US 234389DA US 234389 A US234389 A US 234389A
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ends
ladder
rounds
beam
rods
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    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C1/00Ladders in general
    • E06C1/02Ladders in general with rigid longitudinal member or members
    • E06C1/38Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
    • E06C1/381Ladders with rungs or treads attached only to one rigid longitudinal member

Description

A a? 1i g g 2i k z:

(No Model.) 0 D NNON,

Ladder.

No. 234,389. Patented Nov. 16,1880.

7 Jfroeiae;

degg w i %W N. PETERS, PHOTULHHGEQARHER', WASHINGTON; U 01 lUNTTEo STATES PATENT OEEICE.

CLINTON D. CANNON, OF BATTLE GREEK, MICHIGAN.

LADDER.

SPECIFICATION forming part of Letters Patent No. 234,389, dated November 16, 1880.

Application filed August 21, 1880.

To all whom it may concern:

Be it known that I, CLINTON D. CANNON, of Battle Creek, in the county of Calhoun and State of Michigan, have invented certain new and useful Improvements in Ladders, and I do hereby declare that the following is afull, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, referenee being had to the accompanying drawings, which form apart of this specification.

Figure 1 is a perspective view, and Fig. 2 is a front view, of my improved ladder.

Corresponding parts in both figures are denoted by like letters of reference.

This invention relates to that class of ladders which consist of a single centrally-located beam provided with and supporting a series of transverse rounds or steps; and it consists, essentially, in the combination, with a ladder thus constructed, of truss-rods connected to the ends of the rounds or steps and to the central beam, as will be hereinafter more fully described, and particularly pointed out in the claim.

In the drawings hereto annexed, A represents the central beam of the ladder, which is provided with feet B B and with the transverse rounds or steps 0 C. The ends of the said rounds O C are connected by the truss wires D D, which are wound around or otherwise suitably attached to the extreme outer ends of the said rungs or steps. The extreme upper and lower ends of the said truss rods or wires may be either permanently attached to the ends of the upper and lower rounds or steps or they may be braced from thence to the upper and lower ends of the beam proper.

(N0 model.)

I am aware that this class of ladders have been heretofore constructed with truss wires or rods extending from the top of the main beam diagonally to the ends of the central round, and from thence diagonally down to the lower end of the main beam. By this construction the rounds are imperfectly braced or sustained, and the truss rods or wires are considerable impediments to any person who attempts to mount the ladder, on account of the diagonal line at which each of the upper and lower steps is crossed.

By my improvements the truss-rods eonnect the extreme outer ends of the rods, which are thus perfectly braced, and the said rods or wires, instead of impeding the progress of the person attempting to mount the ladder ofi'er him considerable assistance as handles by which he may sustain his equilibrium.

Having thus described my invention, 1 claim and desire to secure by Letters Patent of the United States As an improvement in ladders, the combination, with the central main beam, A, secured in the supports B B, and having the transverse rounds or foot-pieces C C passing through from side to side, of the truss rods or wires D, connected firmly to the extreme outer ends of said rounds and to the upper and lower ends of the upright beam, as shown and described.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

CLINTON D. CANNON.

Witnesses:

A. CANNON, BEN N. SrEBBINs.

US234389A Ladder Expired - Lifetime US234389A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2418862A (en) * 1945-02-13 1947-04-15 James S Anderson Convertible ladder
US2641401A (en) * 1950-05-13 1953-06-09 James Herschel Ladder
US4199040A (en) * 1979-01-22 1980-04-22 The Laitram Corporation Ship ladder
US4257490A (en) * 1979-06-07 1981-03-24 Bandy Irvin C Portable observation stand
US4316524A (en) * 1980-06-12 1982-02-23 The Laitram Corporation Two-speed ladder
US4524849A (en) * 1984-06-11 1985-06-25 Terrence Arthur Riddle Tripod

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2418862A (en) * 1945-02-13 1947-04-15 James S Anderson Convertible ladder
US2641401A (en) * 1950-05-13 1953-06-09 James Herschel Ladder
US4199040A (en) * 1979-01-22 1980-04-22 The Laitram Corporation Ship ladder
US4257490A (en) * 1979-06-07 1981-03-24 Bandy Irvin C Portable observation stand
US4316524A (en) * 1980-06-12 1982-02-23 The Laitram Corporation Two-speed ladder
US4524849A (en) * 1984-06-11 1985-06-25 Terrence Arthur Riddle Tripod

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