US1365996A - Scaffold - Google Patents

Description

M. 1. HERWICK.

.SCAFFOLD.

APPLICATION FILED FEB. 19. 1920. 1,365,996. Patented an 18,1921.

M. J. HERWICK.

SCAFFOLD.

APPLICATION FILED FEB. 19. 1920.

Patented Jan. 18,1921.

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UNITED STATES MICHAEL J. HERWICK, OF WOODLAWN, ALABAMA.

SCAFIOLID.

Specification of Letters Patent.

Patented Jan. 18, 1921.

Application filed February 19, 1920. Serial No. 359,805.

To all to 7mm it may concern:

Be it known that I, MICHAEL J. HERWIGK, a citizen of the United States, residing at Woodlawn, in the county of Jefferson and State of Alabama, have invented certain new and useful Improvements in scaffolds,

of which the following is a specification.

This invention relates to improvements in scaffolds of the collapsible type.

An important object of this invention is to provide a scaffold havinga longitudinally split platform and legs so arranged that the scaffold may be folded very compactly when not in use.

A further object of this invention is to provide a collapsible scaffold capable of a variety of adjustments so that'thesame may be employed for supporting chimney builders and other mechanics on the top or the side of a gable roof without the possibility of the scaffold collapsing or becoming accidentally dislocated.

A further object of the invention is to provide a collapsible scaffold having a substantially U-shaped platform so that the platform may be readily arranged aboutthe sides of a chimney whereby the workman may construct the chimney without the possibility of falling from the scaffold as the result of effortsto reach the sides of the chimney.

A further object of the invention is to provide a scafiold of the class described which is simple to set up, durable in use and cheap to manufacture.

Other objects and advantages ofthe invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this application and in which like numerals are employed to designate like parts throughout the same,

Figure 1 is a side elevation of. the improved collapsible scaffold mounted centrally upon a gable roof,

Fig. 2 is a perspective of'the scaffold, Fig. 3 is aside elevation of the scaffold applied to one side of the roof,

Fig. 4 is a side elevation of the scaffold collapsed,

Fig. 5 is a plan view of the scaffold collapsed,

Fig. 6 is a vertical transverse section taken on line 6-6 of Fig. 5,

Fig. 7 is a detail section taken on line 7-7 of Fig. 2, i

Fig. 8 is a perspective of a hook embodied in the invention.

In the drawings wherein for the purpose of illustration isJshoWn a preferred embodiment of the invention, the numeral 10 designates the platform of the scaffold which, as illustrated in Fig. 2, is substantially U- shaped so that .thesides 11 and 12 of the same may be arranged on opposite sides of a chimney. As illustrated in Fig. 2, pairs of braces or legs 13 and 14 are horizontally hinged at their upperends to the intermediateportions of the sides 11 and 12 through the medium ofastrap hinges 15. The strap hingesare secured to the under side of the sides 11 and 12 'to permit the legs 13 to be positioned in parallel relation to the sides of the platform when the scaffold is folded. The pairs of braces 13 and 1.41 are adapted to be arranged on opposite sides of the ridge of a gable roof when it is desired to position the platform immediately above the ridge of the gable roof. When applied to a gable roof, as illustrated in Fig. 1, the pairs of legs 13 and 14: lie flatly in contact with the sides of theroof and the sides 11 end 12 of theplatform are positioned on opposite sides of the chimney under construction. The sides 11 and 12 of the platform are joined by a connecting portion 16 which is also arranged atone slde of the chimney being built so that the workman may stand directly in front of three sides of the chimney and may without inconvenience reach the fourth side ofthe chimney. A standard 1? is secured to each of. the legs 13 and 14 at a point spaced from their lower ends by strap hinges 18 which permit the stand- 21 carried by the endszof the platform, said studs being adapted to receive such fastening devices as cotter pins 22 when it is desired to lock the standards to the ends of the platform. By this construction the legs may be positioned at the proper angle to conform to the inclination of the gables of the v roof and therefore the strain is equally dislower portions as it is necessary for these legs to pass beyond the sides of the chimne in positioning the scaffold.

, ith reference to Fig. 3, it will be observed that a scaffold constructedin accordance with this invention may also be employed in connection with chimneys extending through the-side of a gable roof at a point spaced from the ridge-of thesame. In thiscase the legs 13 are folded directly be neath the platform and the extended end portions of the same are arranged upon the ridge of the gable roof. .The legs lt are arranged at the proper, angle toposition the platform horizontallysothat the working material upon the platform will not fall. Thescaffold may be secured in this position by cables 25 anchored attheir upper ends to'loops 26 carriedby the free ends of the legs 13 and at their lower ends to any convenlent stationary object. When the seaffold is positioned as illustrated in Fig. 3, the standards 17 carried by the legs 1a are arranged vertically and out of the way of the workman.

When it is desired touse the scaffold in connection with a chimney which is located a considerable distance from the ridge or comb of the roof; the scaifold may be anchored in position by engaging the hook 60, clearly shown in Fig. 8, with the ridge of the roof.. The hook is provided with a pair ofoutwardly diverging bills 61 which are-adapted to be extended over; the ridge offthe roof for securely engaging the same. The'ho'ok 60 isalso provided with a single rearwardly extending bill 62 which is adapted to be engaged with one of the links of a chain having connection at one end with the i loops26; of the scaffold. 'By this constructiont-he scaffold maybe securely retained in position without the'pos'sibil-ityof slipping chimney;

- and knocking ov'er'the chimney in case the same is new and not set. In repairing old "but set'chimneys, the closed end ofthe scaffold maybe engagedwith'onej side of the When it is desired to fold the scaffold the legs-"13 andl are swung into contact with the under side of the platform and the standards subsequently are folded over upon the platform with their adjacent portions overlapped. As illustrated in Fig. 5, the standards 17 have their opposed longitudinal edges extending diagonally with respect to the longitudinal center of the standards so that the standards may be folded without conflict.

When the legs and the standards are adjusted, the platform may be folded upon the line 28. As illustrated in Fig. 2, the platform is split longitudinally so as to form in effect a pair of L-shaped sections. The L- shaped sections thus formed are connected by a strap hinge 29 which allows the L- shaped sections to be positioned as illustrated in Fig. 4;. The connecting strip 23 is formed of a pair of sections connected by a strap hinge 81. A sliding bolt 83 is carried by the under side of one of the L-shaped sections of the platform and is extended through a keeper carried by the other L-shaped section for preventing the accidental collapse of the platform. However. it will be noted that the hinges Q5 and ill must be longitudinally alined to permit either the connecting strap 23 or the connecting member 16 to collapse. In the operative position, the hinge pin of the hinge 29 is arran ed horizontall and, the hinge pin.of the hinge 31 is arranged in an inclined position and out of alincmcnt with the hinge 29 so that accidental collapse of the parts is impossible.

With reference to the foregoing description. taken in connection with the accompanying drawings, it will be observed that a scaffold constructed in accordance with this invention is capable of a variety of adjustments to meet different conditions of use and that the scaffold may be readily folded when desired so as to occupy a minimum amount of space.

When the scaffold is used for ground work, such as supporting boards along the side of a building, the upwardly extending portions of the standards serve as an el'licient means for preventing the boards from sliding off of the platform. The scafiold may, however, be employed without the use of planks and in this case the workman will stand directly upon the platform.

It is to be understood that the form of the invention herewith shown and described is to be taken as a preferred embodiment of the same and that such minor changes in construction and arrangement of parts may be made as will remain within the spirit of the invention and the scope of what is claimed.

Having thus described the invention. what is claimed as new is:

1'. A scaffold including a. platform hav- Sill llO

ing a pair of L-shaped sections, pairs of legs hinged to said platform, standards con nected to said pairs of legs, and a locking device extendin over the adjacent portions of said L-shaped sections.

2. A scaffold including a collapsible plat form having an opening extending out through one end, pairs of legs hinged to said platform, a collapsible strip connecting one pair of said legs, and standards secured to said legs and said platform.

3. A collapsible scaffold comprising a pair of L-shaped hingedly connected sections, a lockingdevice extending over the adjacent portions of said L-shaped sections and adapted for detachably securing the same in an open position, and supporting devices connected to said L-shaped sections.

4. A scaffold comprising a platform inclusive of a pair of L-shaped hingedly con nected sections, means for locking said sections in an open position, legs arranged in pairs and connected to said sections, and a strip connecting one pair of said legs and inclusive of a pair of hingedly connected sections. A

5. A scaffold including a U-shaped platform, pairs of legs hinged to said platform, said platform being split lon itudinally thereby forming a pair of L-siaped sections, a bolt carried by one of said L-shaped sections, a keeper carried'by the other L shaped section and adapted to receive said bolt, and a connecting strip joining one pair of said legs.

6. A scaffold including a longitudinally split platform provided with a pair of sections, pairs of legs hinged to said platform, standards hin ed to said legs, means to connect said standards to said platform, a strip connecting one pair of said legs and comprising a pair of hingedly connected sec-' tions, and means whereby the sections of said platform may be locked together.

7. A scaffold including a U-shaped platform having spaced parallel sides and a transverse connecting portion comprising a pair of hingedly connected sections and means to lock the sections in an open position whereby the sides of the platform are disposed in the same plane, and legs supporting the platform.

8. A collapsible scaffold including a U- shaped collapsible platform having a pair of sections hingedly connected 011 a line 1011' gitudinal of said platform and an opening extending out through one end of said platform for receiving a chimney, means whereby the sections of the platform may be locked in an open position, and legs secured to said-platform.

In testimon whereof I aflix my signature.

MICHA 4L J. HEHWIGK. [Ls] Witnesses Ron F. POWELL, J. E. Rnonns.

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