US976074A

US976074A - Folding scaffold-ladder.

Info

Publication number: US976074A
Application number: US52297509A
Authority: US
Inventors: Hugo F Hartman
Original assignee: Individual
Current assignee: Individual
Priority date: 1909-10-16
Filing date: 1909-10-16
Publication date: 1910-11-15
Anticipated expiration: 1927-11-15

Description

H. F. HARTMAN.4 FOLDING SCAPPOLD LADDER. APPLICATION FILED ooT.,1 e, 1909.

Patented Nov. 15, 1910.

ing the same.

new and useful Improvements in Fold-ing ycuring ot the JFoldable sections of the scafand claimed.

(5). The arm (5) is `Nrra sVrA'rs" FFQ.

FOLDING'` SCAFFOLD-LADDER.

specincaaon of Letters Patent. pagante@ N0m15, 19m.,

Application led October 16, 1909. Serial No. 522,975.

To all whom t may concern: Be it known that l, HUGO F. HAii'rirAN, citizen of the United States, residing at Milwaukee, in the county ot' Milwaukeeand State ot 'isconsin, have invented ceitain Scaffold-Ladders, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to foldable scatfolds and more particularly to a means for brac- Another object of this invention is the provision of means for facilitating the se fold together.

Vith these and other objects in view this invention consists of certain 'novel constructions, combinations and arrangements of parts as will be hereinafter tully described In the drawings: Figure l is a perspective View of the, scaffold showing the sections in an extended position. Fig. Q is a side elevation of the connecting brackets carried by the sections of the scaffold, showing the scaffold or sections .in a folded position. Fig. 2l is a perspective view ot' one of the connecting brackets. Fig-4 is a section taken on line Ligt of Fig. l.

Referring to the drawings by numerals, (1) designates the primary section of the. scaffold and (2) the auxiliary section. To each of the side members of the primary and auxiliary sections are secured hooks (3) to which hooks are attached guy ropes or brace members The brace members (4) are also engaged by a depending arm rovided upon its lower end with a notch- G) through which passes the brace or guy member 4). The top portion (7) of the depending arm is bent at right angles tothe lower portion (8) thereof and the top portion (7) is secured to the \connccting brackets as hereinafter described.

To the adjacent ends of the primary and auxiliary sections are secured bracket members (9) which are provided with a substantially Ushaped body portion which straddles the side members of the primary and auxiliary sections. The fianged or* tions (10) of the U-shaped'body ortions of the brackets (9) are engaged y bolts (11) which pass through the side members secure the bracket members thereto. The

of the primary and auxiliary sections and' bracket members are provided with enlarged ends (12) which enlarged ends extend orl A transversely extendin member (15) which is oppositely threade at its-respective ends. connects the brackets' carried by the primary section with the brackets carried b the auxiliary section, the ends of the ro (15) passing through the apertures (13) of leach of the connecting brackets. A bolt (1G) which ,is connected to the top portion (7) ofthe connecting arm (5) passes through the slots (14) in the bracket members and the sections are clamped together by means of a thumb nut- (17) threaded upon the outer end of said bolt (16)'. (18) are threaded upon the respective ends of the bolt or rod (15) and iirmly clam the upper ends of the depending arms (5 tothe bracket members. It will therefore One side of (12) is provided with Thumb nuts be obvious that' by having the two securingineaiis as, for instance, the rod (15) and the bolts (1(3) in connection with' the guy members (4) and the depending arm (5) that the sections will be thoroughly braced When held in an extended osition. Brace members (19) are secure to the inner sides of the side rails of the primary and auxiliary sections near the adjacent ends of same and are engaged attheir outer ends b means of the rod (15). The outer ends o' the brace members (19) are held or clamped in a set position by means bf thumb nuts (20) and (2i). By means of the brace members (19) the-side members of the primary and auxpreventad v from spreading laterally.

it Wli be obvious that by-havin the bracketl members provided with loiig1tudi nelly extending slots near the lower ends of the enlarged ends (12),v the longitudinally extending braces or guys removed from the hoo s 3) b releasing the thumb nut (17) upon t e bo t (16) an( (4) Vcan be easi1yliliary sections will be braced and will be I.,

.section from spreading.

allowing the bolts (16) to work within the slots (14) thereby allowing the sections to be bowed slightly upward.

What I claim as my invention is:

l. A scaffold of the class ldescribed coinprising a pair of sections, connecting brackets, said connecting brackets body portion substantially U-shaped in cross section, said bracket-s provided with enlarged ends, adapted to overlap, said enlarged ends provided upon one.v side thereof with an aperture, and upon the other side thereof With a longitudinally extending slot, a depending arm, means passing through said dependlng arm and said apertures and slots for connecting the depending arm and brackets together, and means 'connected to the sections and engaging the depending arms for preventing the sections from being folded in an upward direction.

2. A scaifold of the class described comprising a pair of sections, brackets carried thereby and provided with enlarged ends adapted to overlap, a transversely extending rod passing through said enlarged ends vfor connecting theisarne, and brace means carried by the primary'land auxiliary sectlons and engaging suid'transversely extendlng rod for preventing the sides of said comprising a` 3. A scaifold of the class described coinprising a pair of sections, brackets secured thereto and provided with apertured ends, being adapted to overlap, said ends provided with apertures and longitudinally extending slots, a depending arm, a transversely extending member passing through the upper ends of said depending arms and through said apertures in the ends of said brackets, a bolt passing through said depending arm and working in said slots in the ends of said brackets and longitudinally extending brace means carried by said primary and auxiliary sections and adapted to be engaged by said depending arms.

4. A scaffold of the class described, comprising a pair of sections', brackets carried thereby, a rod connecting said brackets, braces secured to the sides of said sections and engaging said rod, thumb nuts threaded 'upon said rod and adapted to hold said braces in a set position upon Asaid rod for preventing the sides of said sections from spreading.

In testimony whereof I hereunto aiix my signature in presence of two witnesses. Y

p HUGO F. HARTMAN. VVitnesse's: c

Louis MEIER, PAUL SUHLESNE'R.