US204191A - Improvement in step-ladders - Google Patents
Improvement in step-ladders Download PDFInfo
- Publication number
- US204191A US204191A US204191DA US204191A US 204191 A US204191 A US 204191A US 204191D A US204191D A US 204191DA US 204191 A US204191 A US 204191A
- Authority
- US
- United States
- Prior art keywords
- ladder
- ladders
- braces
- improvement
- hinge
- 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
Links
- 210000000282 Nails Anatomy 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
- E06C1/39—Ladders having platforms; Ladders changeable into platforms
- E06C1/393—Ladders having platforms foldable with the ladder
Definitions
- Figure 1 is a vertical section of my improved step-ladder, taken on line :0 x in Fig. 2.
- Fig. 2 is a rear elevation.
- Fig. 3 is a detail front view, showing the manner of connecting the steps and side piece.
- a A are the side pieces of the step-ladder, in each of which there is a slot, at, running nearly the whole length, to render it lighter.
- the upper ends of these side pieces are fitted to dovetail grooves in the upper portion, and steps b b, &c., are fitted to dovetail grooves in the side pieces.
- the hinges which receive the braces each consist of an L-shaped bracket, 0, which supports the rearwardly-projecting edge of the step B, and upon which there is an ear, 0, which is perforated to receive the stud d, that projects from the right-angled plate D, which incloses the upper end of the ladder-supporting brace E on the side and back.
- the back portion of the right angled plate D has a notch, 01', in its lower end, for receiving the upper end of the diagonal brace c, that is attached to both braces E.
- the upper end of the back portion of the plate D abuts against a shoulder, f, on the ear 0 when the ladder is set up'in position for use.
- the rear braces may be disconnected from the ladder by springing apart the upper ends of the braces, so as to disengage the hinges.
Landscapes
- Ladders (AREA)
Description
UNITED STATES PATENT OFFICE.
JOHN J. BRADY, OF LONG ISLAND OITY, NEW YORK.
IMPROVEMENT IN STEP-LADDERS.
Specification forming part of Letters Patent No. 204,191, dated May 28, 1878; application filed December 27, 1877.
To all whom it may concern:
Be it known that I, Jo n: J. BRADY, of Long Island City, county of Queens, and State of New York, have invented a new and Improved Step-Ladder, of which the following is a specification:
Figure 1 is a vertical section of my improved step-ladder, taken on line :0 x in Fig. 2. Fig. 2 is a rear elevation. Fig. 3 is a detail front view, showing the manner of connecting the steps and side piece.
Similar letters of reference indicate corresponding parts.
The invention will first be described in connection with drawing, and then pointed out in the claim.
Referring to the drawing, A A are the side pieces of the step-ladder, in each of which there is a slot, at, running nearly the whole length, to render it lighter. The upper ends of these side pieces are fitted to dovetail grooves in the upper portion, and steps b b, &c., are fitted to dovetail grooves in the side pieces. By means of this construction the steps and side pieces are firmly secured together without screws or nails.
The hinges which receive the braces each consist of an L-shaped bracket, 0, which supports the rearwardly-projecting edge of the step B, and upon which there is an ear, 0, which is perforated to receive the stud d, that projects from the right-angled plate D, which incloses the upper end of the ladder-supporting brace E on the side and back. The back portion of the right angled plate D has a notch, 01', in its lower end, for receiving the upper end of the diagonal brace c, that is attached to both braces E. The upper end of the back portion of the plate D abuts against a shoulder, f, on the ear 0 when the ladder is set up'in position for use.
By using this hinge the various sorts of stays that have heretofore been employed in preventing the rear braces from slipping backward may be dispensed with, as the hinge limits rearward movement of the braces.
In heavy ladders, where it is desirable'to move only a part of the ladder at once, the rear braces may be disconnected from the ladder by springing apart the upper ends of the braces, so as to disengage the hinges.
I am aware that it isnot new to make a mortised bracket to receive the side standards of the ladder and a hinge-arm pivoted to an ear, together with a stop; but
What I claim is-- g V The step-ladder hinge composed of the part 0, (to be attached to thestile,) having the flange c, for sustaining the top step, and the hinge-ear c, with stop f, and the part D, (to be attached to the legs,) having the stud d and angle-piece, provided with the notch 01', for holding the head of the brace c, all as shown
Publications (1)
Publication Number | Publication Date |
---|---|
US204191A true US204191A (en) | 1878-05-28 |
Family
ID=2273596
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US204191D Expired - Lifetime US204191A (en) | Improvement in step-ladders |
Country Status (1)
Country | Link |
---|---|
US (1) | US204191A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2643808A (en) * | 1950-04-29 | 1953-06-30 | Mcalister Henry | Stepladder |
US4089084A (en) * | 1977-06-14 | 1978-05-16 | Droz Daniel M | Internal hinge |
-
0
- US US204191D patent/US204191A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2643808A (en) * | 1950-04-29 | 1953-06-30 | Mcalister Henry | Stepladder |
US4089084A (en) * | 1977-06-14 | 1978-05-16 | Droz Daniel M | Internal hinge |
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