US1503581A

US1503581A - Traveling scaffold

Info

Publication number: US1503581A
Application number: US581383A
Authority: US
Inventors: August L N Fleming
Original assignee: Individual
Current assignee: Individual
Priority date: 1922-08-12
Filing date: 1922-08-12
Publication date: 1924-08-05
Anticipated expiration: 1941-08-05

Description

Aug. 5 1924. 1,503,581

A. L. N. FLEMING TRAVELING SCAFFOLD Filed Aug. 12, 1922 3 Sheets-Sheet l an vc u to:

62 51 nmwemgzy g ghls Gwen H213 Aug. 5, 1924. 1,503,581

A. L. N. FLEMING TRAVELI "G S CAFFOLD Filed Aug. 12, 1922 3 Sheets-Sheet 2 guucufoz Aug. 5 1924. 1,503,581

A. L. N. FLEMING TRAVELING S CAFFOLD Filed Aug. 12, 1922 :s Sheets-Sheet 5 Patented Aug. 5, 1924.

AUGUST L. rmmmo, 0F LYNDEUBS'I, NEW

JERSEY.

raamme somonn.

Application filed August 12,1922. sci-m 80. areas.

To all whom it may concern:

Be it known that I, AUGUST L. N. FLEM- me, a citizen of the Republic of France, and a resident of Lyndhurst, in the county of Bergen and State of New Jersey, havethereof by being moved back and forth in longitudinal directions or extensibly adjusted u wardl and downwardly to different hei ts, an which is of a form whereby these adjustments are accom lished from the uppermost part of the sea old, in order to save time and trouble when it is desired to change the positions of the scaffold as is incident to the forms of suspendedscaflolds in ordinary use- The invention consists essentially of a ladder com osed of extensibly adjustable sections, an on the lower section are wheels for traveling on a surface, while on the uppermost section are, wheels for traveling on the walls of a structure. Manually operative mechanism is provided on the uppermost section to revolve all the wheels in unison when it is desired to move the v scafi'old lengthwise of the wall, and also on the uppermost section is provided manually operative mechanism for adjustin the sections of the ladder in upward and ownward directions so that persons working on the scaffold may appropriately adjust its height as well as move it to suitable positions as occasion requires. s

Other ob ects of the invention are to rovide a safety brake which is operative w en the cable is severed to check accidental lowering of the upper sections of the ladder for preventing accidents; to provide rollers on the uppermost section of the ladder above the upper wheels, and these rollers are adjustable for spacing the, uppermost section with the upper wheels from the wall prior to operating the cable for extensibly adjusting the sections of the ladder; and to provide a traveling scaffold ofa simple, eflicient and and will then showing a plan of durable construction which may be made in any a propriate size.

Wit these and other objects in vieiv, the invention will be hereinafter more fully described with reference to the accompanying drawings formin a part of this specification in which simllar characters of reference indicate corres onding parts in all the views, ointed out in the claims at the end of the escription.

In the drawings, Figure 1 is a front elevation of one form of traveling scafi'old embodying my invention.

Fig. 2 is a side elevation of the scaffold.

Fig. 3 is an enlarged fragmentary view, showing an elevation of the parts of the mechanism for extensibly adjusting the sections of the ladder used 111 the apparatus.

Fig.4 is an enlarged fragmentary view, arts of the mechanism for causing the lad er to be wheeled.

Fig. 5 is an enlarged fragmentary view showing the form of safety brake used in conjunction with the sections of the ladder.

Fig. 6 is an enlarged to plan of the parts of the scaffold with the oor and railing of the platform removed, and

Fig.7 is an enlarged detail sectional view taken on the line 7 7 of Fig. 2.

The apparatus or scafi'old has a ladder 10 which may be composed of any a propriate number of separate sections, thoug the form of the ladder illustrated has two

sections

11, 12. each having two

side bars

13, 14 and PA ENT OFFICE...

spaced rungs or rods 15 therebetween so that persons may climb up and down the ladder. The sections are relatively arranged so that the upper parts of the side bars of the section 11 movably overlap the lower parts of the side bars of the upper section 12 for allowing the ladder to be extensibly lengthened and shortened. On the upper end portion of the

side bars

13, 14 of the section 11 of the ladder are spaced

sleeves

16, 16 and 17, 17 in which the lower, end portions of the side bars of the up or section 12 are slidably disposed for hol ing the sections of the ladder extensibly together, and rojecting laterally from the sleeves 16 an 17 are two alined bearings, as 18, 19. On the lower ends of the

side bars

13, 14. of the lower section 11 are two brackets, as 20, 21, which protrude in opposite lateral directions as well as terminatlng with bearings, as 22, 23, and also extendin from the brackets at the rear of the

bearings

22, 23 are two more across the lower end of the ladder. Also protruding from the bracket 20 may be a caring 29* which is on alinement with the

bearin

18, 19 of the

sleeves

16, 17.

On t e upper end of the section 12 of the ladder 10 is a latform, as 30, having two spaced parallel eams or

bars

31, 32 on top of which is a floor, as 33, of substantially a rectan ular shape, and extending upward from t e floor may be a railing, as 34, so that persons usin the scaffold may safel stand on the platform while working. The central parts of the

beams

31, 32 of the platform 30 are mounted on the upper ends of the

side bars

13, 14 of the uppermost section 12 of the ladder by two brackets, as 35, 36, so that the platform will be longitudinally level when the ladder is disposed on an incline, as shown in Fig. 2, and these brackets are adjustable on the

beams

31, 32, as will be hereinafter more fully explained. On the lower part of the bracket 35 may be a hearing, as 37, which is on alinement with the

bearings

18, 19 of the

sleeves

16, 17 and with the bearing 29 of the bracket 20. Protruding laterally from the bracket 35 above the bearing 37 are two alined spaced

bearings

38, 39, and projecting laterally in an o posite direction from the bracket 36 are also two alined spaced

bearings

40, 41. On the rear ends of the

beams

31, 32 of the platform 30 are two brackets, as 42, 43, and extending in opposite lateral directions from these bracketsare two arms or

plates

44, 45. Also extending in opposite lateral directions from the

brackets

42, 43 are two arms or

plates

46, 47 which are spaced above the

plates

44, 45. On the upper faces of the

plates

46, 47 are two

hollow bearings

48, 49

ig. 6 which extend upwardly as well as rearwardly toward the rear ends of the

beams

31, 32 of the platform 30.

In registered holes provided at the ends of the airs of spaced

plates

44, 45 and 46, 47 of

t e brackets

42, 43 are j ournaled the ends of

vertical studs

50, 51 on which are held two

wheels

52, 53 adapted to travel when revolved on the wall or the like of a building or other structure when the scaffold is in use. On the studs 26, 27 of the brackets 20, 21 on the lower end of the ladder are held two wheels, as 54, 55, adapted when revolved to travel on the surface adjacent the wall when the scaffold is employed, and serving to cause all of these wheels to revolve in unison I provide a mechanism, as 56 which is manually operative from the platform 30 for shifting the scaffold from place to place.

The mechanism 56 ma be of any appropriate type, though the orm of the mechanism illustrated, has a shaft 57 which is jour, naled in the

bearings

29, 18, 19, 37 on the sections of the ladder l0,'and this shaft is of an extensibly adjustable form having a tubular section 58 of a length approximately similar to the length of the lower section 11 of the ladder. In the upper end of the tu bular section 58 of the shaft 57 is an extensibly adjustable section 59 which extends somewhat above the bearing 37 of the section 12 of the ladder. These sectional parts of the shaft- 57 will thereby be extensibly lengthcried and shortened with the extensible adjustment of the sections of the ladder, and the sections of this shaft are revolvable in unison by the section 59 being frictionally held in the section 58 against tendency to rotate independently of the section 58 or the sections may be formed with angular extensibly interfitting parts. On the lower end of the section 58 of the shaft 57 is a worm 60 which is in mesh with a worm gear 61 held on the shaft 28 and also on both ends of the shaft 28 are held

bevel gears

62, 63 in mesh with bevel gears, as 64, 65, held on the studs 26, 27 of the

wheels

54, 55. On the upper end of the section 59 of the shaft 57 is a bevel gear 66 in mesh with a bevel gear 66 held on one end of a shaft 67 which is j ournaled in the

brackets

35, 36, of the

beams

31, 32 of the platform 30. The shaft 67 thus extends across the beams of the latform, and on the second end of the sha t 67 is a bevel gear 68. The

bevel gears

66, 68 are in mesh with

bevel gears

69, 70 held on

shafts

71, 72 which are journals-d respectively in the

bearings

38, 39 and 40, 41 of the

brackets

35, 36 of the beams of the platform. The

shafts

71, 72 are of such lengths that their rear ends terminate at the rear ends of the beams of the platform, and at the rear ends of these shafts are worms 73, 74 meshing with

worm gears

75, 76 held on the

studs

50, 51 of the

upper wheels

52, 53. Projectin on an upward incline from the bracket 36 0 the beam 32 of the platform is a bearing 77 in which is ournaled a stud 78 having on its lower end a bevel gear 79 in mesh with the bevel gear 68 of the shaft 67. On the u per end of the stud 78 is held a crank hand e 80 adapted to be manually operated by a person positioned on the platform 30. The mechanism 56 is operated to cause the scaffold to be moved from place to place by the handle 80 being revolved accordingly." The stud 78 and

thebevel gears

79, 68, will then be rotated to revolve the shaft 67 and bevel gear 66. The

bevel gears

69, 70,

shafts

71, 2, worms 73, 74, and the

worm gears

75, 76

- as 92 Figs. 2 and 5.

will be rotated to revolve the wheels'52, '53 on the wall or the like of a building or other structure when the scaffold is in use. With the o ration of these parts the bevel gear '66 wi 1 be rotatedto drive the sectional shaft 57, and in turn the worm 60, worm gear 61, shaft 28, bevel gears 62,63 and bevel rs 64, will be rotated to drive the stu 26, 27 and the

wheels

54, 55 to cause the scaffold to move on the surface at the base of the wall simultaneously with the travel of the

wheels

52, 53 on the wall.

Serving to cause the platform 30 to be raised and lowered as occasion requires by extensibly adjusting the

sections

11, 12 of the ladder 10, a mechanism, as 81, is provided. The mechanism 81 preferably 1n.- cludes a drum or pulley, as 82, which is freely revolvable on theshaft 67 of the mechanism 56, and this drum may be movably held in proximity to the beam 31 of the platform against tendenc to slidably shift on the shaft 67 by a co lar 83 which is fixed to the shaft. On the central part of one of the lower rungs 15 of the section 12 of the ladder is held one of the ends of a bracket, as 84,

protruding rearwardly of the ladder, and

this bracket carries a pulley, as 85 Figs. 1, 2, 5. Wrapped on the.drum 82 is one end ortion of a cable or line 86 which passes downwardly over the ulley 85 and then upwardly so that an end of the cable is held to one of 'the rungs of the upper end of the lower section 11 o worm gear 87, and meshing with this worm gear is a worm 88 provided on the lower end of a stud 89 which is journaled in a bearing 90 extending upwardly from the bracket 35 of the beam 31 of the platform. On the uper end of the stud 89 is a crank handle 91 isposed above the platform 30 so that when a person on the platform revolvably swings the handle the stud 89, worm 88 and the worm gear 87 will be rotated. The drum 82 will then also be revolved to wrap or unwrap the cable 86 for causing the upper section 12 of the ladder to be extensibly adjusted relative to the lower section 11 of the ladder when it is desired to raise or lower the plat form 30 without requiring the person to leave the platform.

Should the cable 86 he accidentally severed the sections of the ladder will be prevented from collapsin by a-safety device, he safety device is composed of a cam'wheel 93 which is eccentrically held on a stud 94 journaled in a bearing. as95, provided on the sleeve 18 of the ladder so that in event of the upper section 12 of the ladder and the platform 30 tending to accidentally move downwardly the cam wheel will revolve for being frictionally wedged against the side bar 13 of the section 11 of the ladder. The downward the ladder. On the shaft 67 and held to one end of the drum 82'is a.

movement of the section 12 with the platform will thereby be effectually checked.

Prior to operating the mechanism 81 for causing the sections of the ladder to be extensibly adjusted, as explained, the

wheels

52, 53 are spaced from the wall with which they contact, and this is accomplished by operatin a mechanism, as 96. The mechanism 96 includes a shaft 97 having in roximity to its ends two eccentric whee s or

cams

97 and 97 which are journaled in the

hollow bearings

48, 49 of the

brackets

42, 43 of the

beams

31, 32 of the platform. On the ends of the shaft 97 above the

wheels

52, 53 are two freely

revolvable wheels

98, 99 of such diameters that when partly revolved accordingly their peripheries will extend beyond the rims of the

wheels

52, 53. On the central part of the shaft 97 is held a handle 100 which is positioned with relation to the

cams

97, 97 so that when the handle is swung this shaft will be revolved for revolvably swinging the

cams

97, 97 for causing the

idler wheels

98, 99 to contact with the wall to spacethe

wheels

52, 53 therefrom and with the operation of the mechanism 81 these wheels will travel upwardly or downwardly on the wall to allow the sections of the ladder to be readily adjusted extensibly.

The

brackets

35, 36 are movable on the beams 31, .32 to allow the platform 30 to be adjustably positioned against a wall for positioning the ladder a suitable distance rom the wall. The

brackets

35, 36 are there fore movably fastened to the beams b nut bolts, as 101, 102, which are removab y inserted in registered

holes

103, 104 in the brackets, and in forward end portions of the

beams

31, 32 are spaced pairs of registered holes 105, 106.- When it is desired to adjust the, platform the

brackets

35, 36 are moved by removing the

bolts

101, 102 from the holes in the brackets and from the holes in the beams in which they may be seated. The brackets are then slidably moved on the beams to properly position the platform, in which instance, the pair of

holes

103, 104 of the brackets must be in register with one of the other pair of

holes

105, 106 in the beams. By then refastening the bolts in the airs of registered holes in the brackets an in the holes of the beams the platform will be held .against accidental movement in itsadjusted parting from the principle or sacrificing any of the advantages of this invention, therefore, I reserve to myself the ri ht to make such changes as fairly fall within the scope thereof.

Having thus described my invention, I claim as new and desire by secure by Letters Patent:

1. In a traveling scaffold, in combination, a ladder composed of extensibly adjustable sections, a platform on the uppermost section, wheels on the lower section for traveling on a surface, wheels on the upper section for traveling on a wall, and mechanism manually operative on the platform for simultaneously revolving all of the wheels to cause the scaffold to travel on the surface.

2. In a travelin scaffold, in combination, a ladder compose of extensibly adjustable sections, a platform on the uppermost section, wheels on the lower section for traveling on a surface, wheels on the upper section for traveling on a wall, mechanism manually operative on the platform for simultaneously revolving all of the wheels to cause the scaffold to travel on the surface, and mechanism also manually operative on the platform to extensibly adjust the sections of the ladder.

3. In a traveling scaffold, in combination, a ladder composed of extensibly adjustable sections, a platform on the uppermost section, wheels on the lower section for traveling on a surface, wheels on the upper section for travelin on a wall, and mechanism manually operative on the platform for simultaneously revolving all of the wheels to cause the scaffold to travel on the surface. a cable operatively holding the sections of the ladder together, and mechanism also manually operative on the platform for operating the cable to extensibly adjust the sections of the ladder.

4. In a travelin scaffold, in combination, a ladder compose of extensibly adjustable sections, a platform on the uppermost section, wheels on the lower section for traveling on a surface, wheels on the upper section for traveling on a wall, and mechanism manually operative on the platform for simultaneously revolving all of the wheels. a cable operatively holding the sections of the ladder together, mechanism also manually operative on the platform for operating the cable to extensibly adjust the sections of the ladder, and a safety brake operative when the cable is severed to check accidental lowering of the upper sections of the ladder.

5. In a traveling scaffold, in combination, a ladder composed of extensibly adjustable sections, a platform on the uppermost section, wheels on the lower section for traveling on a surface, wheels on the upper section for travelin on.a wall, and mechanism manually operative on the platform for simultaneously revolving all of the wheels, a

. a ladder compose neoaear cable operatively holding the sections of the ladder together, mechanism also manually operative on the platform for operating the cable to extensibly adjust the sections of the ladder, rollers on the upper section of the ladder above the up er wheels, adjustable for moving the plat orm and u per sections to space the upper wheels om the wall preceding operation of the cable to extenslbly adjust the sections of the ladder.

6. In a travelin scaffold, in combination, a ladder compo of extensibly adjustable sections, a platform on the uppermost section, wheels on the lower section for traveling on a surface, wheels on the upper section for traveling on a Wall, and maehanism manually operative on the platform for simultaneously revolving all of the wheels, a cable operatively holding the sections of the ladder together, mechanism also manually operative on the platform for operating the cable to extensibly adjust the sections of the ladder, a safety brake operative when the cable is severed to check accidental lowering of the upper sections of the ladder, rollers on the upper section of the ladder above the upper wheels,-adjustable for moving the platform and upper sections to space the upper wheels. from the wall preceding operation of the cable to extensibly adjust the sections of the ladder.

7. In a travelin scafi'old, in combination, a ladder compose of extensibly adjustable sections, a platform on the uppermost section, wheels on the lower section for traveling on a surface, mechanism manually operative on the platform for simultaneously revolving all of the wheels, a cable operatively holding the sections of the ladder together, mechanism also manually operative on the platform for operating the cable to extensibly adjust the sections of the ladder, and a safety brake operative when the cable is severed to check accidental lowering of the upper sections of the ladder.

8. In a traveling scafiold, in combination, a ladder composed of extensibly adjustable sections, a platform on the uppermost section, a shaft journaled in the lower end of the lower section, wheels held on the shaft for traveling on a surface, a shaft journaled in the uppermost section, wheels held on the upper shaft for traveling on a wall, and. manually operative mechanism on the platform for simultaneously driving both shafts to revolve all of the wheels to cause the scaffold to travel.

9. In a travelin scaffold, in combination,

d of extensibly adjustable sections, ashaft journaled in the lower end of the lower section, wheels held on the shaft for traveling on a surface, a shaft journaled in the uppermost section, wheels held on the upper shaft for traveling on a wall, manually operative mechanism on the uppermost holding the sections of the ladder together,

and manually operative mechanism on the uppermost section to extensibly adjust the sections of the ladder.

,10. In a traveling scaffold, in combination, a ladder composed of extensibly adjustablesections, a'platform on the uppermost section, a shaft journaled in the lower end of the lower section, wheels held on the shaft for traveling on a surface, a shaft journaled in the uppermost section, wheels held on the upper shaft for traveling on a wall, manually operative mechanism on the platform for simultaneously driving both shafts to revolve all of the wheels to cause the scaffold to travel, a cable operatively holdin the sections of the ladder together, manua 1y operative mechanism on the platform for operating the cable to 'extensibly adjust the sections of the ladder, and a safety brake operative when the cable is severed to check accidental lowering of the upper sections of the ladder.

11. In a traveling scaffold, in combination, a ladder composed of extensibly adjustable sections, a shaft journaled in the lower end a of the lower section, wheels held on the shaft for traveling on a surface, ,a shaft journaled in the uppermost section, wheels-held on the upper shaft for traveling on a wall, manually operative mechanism on the uppermost section for simultaneously drivlng both shafts to revolve all of the wheels .to cause the scaffold to travel, a cable operatively holding the sections of the ladder together, manually operative mechanism on the platform for operating the cable to extensibly adjust the sections of the ladder, a safety brake operative when the cable is severed to check accidental lowering of the upper sections of the ladder, and rollers on the upper section of the ladder above the upper wheels, adjustable for moving the platform and up or sections to space the upper wheels from tlie wall preceding operation of the cable to extensibly adjust the sections of the ladder.

12. In a traveling scaffold, in combination, a ladder composed of extensibly adjustable sections, .a platform on the uppermost section, a shaft journaled in the lower end of the lower section, wheels held on the shaft for traveling on a surface, a shaft journaled in the uppermost section, wheels held on the upper shaft for traveling on a wall, manually operative mechanism on the uppermost section for simultaneously driving both shafts to revolve all of the wheels for causing the scaffold to travel, a cable 0 eratively holding the sections ofthe lad er together, manually op- ;orative mechanism on the platform for operating the cable to extensibl adjust the sections of the ladder, a safety rake operative when the cable is severed to check accidental lowering of the upper sections of the ladder, and rollers on the upper section of the ladder above the upper wheels, adjustable for moving-the platform and upper sectionsto' space the upper wheels from the wall receding operation of the cable to extenslbly adjust the sections of the ladder.

13.. In .a traveling scaffold, in combination, a ladder composed of extensibly adj ustable sections, an adjustable platform on the uppermost section, a. shaft journaled in the lower end of the lower section, wheels held on the shaft for traveling on a surface, a

shaft journaled in the uppermost section,

wheels held on the upper shaft for traveling on a wall, and gearlng manually operative on the platform for simultaneously driving both shafts torevolve all of the wheels to cause the scaffold totravel.

14. In a traveling scaffold, in combination, a ladder composed of extensiblyadjustable sections, an adjustable platform on the uppermost section, a shaft ournaled in the lower end of the lower section, wheels held on the shaft for traveling on a surface, a shaft journaled in the uppermost section, wheels held on the upper shaft for traveling on a. wall, gearing manually operative on the platform for simultaneously driving both shafts torevolve all of the wheels to cause the scaffold to travel, a cable operatively holding the sections of the ladder together, and gearing manually operative also on the platform for operating the cable to extensibly adjust the sections of the ladder.

15, In a traveling scaffold, in combination, a ladder composed of extensibly adjustable sections, an adjustable latform on the uppermost section, a shaft ournaled in the lower end of the lower section, wheels held on the shaft for traveling on a surface, a shaft journaled in the uppermost section, wheels held on the upper shaft for traveling on a wall, gearing manually operative on the platform for simultaneously drivingboth shafts to revolve all of the wheels to cause the scaffold to travel, a cable operatively holding the sections of the ladder together, gearing manually operative also on the platform for operating the cable to extensibly adjust the sections of the ladder, and a safety brake operative when the cable is severed; to check accidental lowering of the upper sections of the ladder.

16. In a traveling scaffold, in combina- -tion, a ladder composed of extensibly adjustable sections, an adjustable latform on the uppermost section, a shaft ournaled in the lower end of-the lower section, wheels held on the shaft for traveling on a a shaft journaled in the uppermost section, wheels held on the upper shaft for traveling on a wall, manuall o rative on the platform r si iultaneou sly driving both shafts to revolve all of the wheels to eau'se the scaffold to travel, a cable operatively 5 holding the sections of the ladder together,

rin manually operative also on the platorm or operating the cable to extensibly adjust the sections of the ladder, a safety brake operative when the cable is severed to 1 check accidental lowering of the u per sections of the ladder, and rollers on t e upper section of the ladder above the upper wheels,

adjustable for moving the platform and upper sections to space the upper wheels from the wall receding operating of the cable to extensl 1y adjust the sections of the ladder.

This specification signed and witnessed this 11th day of August A. D. 1922.

AUGUST L. N. FLEMING.

Witnesses D. MAGUIRE, J. 1 FREDERICK (111mm