US779362A

US779362A - Portable scaffold.

Info

Publication number: US779362A
Application number: US19424004A
Authority: US
Inventors: John G Hehr
Original assignee: Individual
Current assignee: Individual
Priority date: 1904-02-18
Filing date: 1904-02-18
Publication date: 1905-01-03
Anticipated expiration: 1922-01-03

Description

PATENTED JAN. 3, 1905.

J. G. HEHR. PORTABLE SGAFPOLD.

APPLICATION FILED FEB. 18 1904.

3 SEEETS-SHEBT 1'.

y a J H o o. m m n M 2 a0 a 1 4 1 I 0 M G I M 7\ 0 A 4 1 I 2 0. o 0W0 o m a m 4 w. i M Q 1 2 No, 779,862. PATENTED JAN. 3, 1905.

J. G. HEHR. PORTABLE SOAPFOLD.

APPLIOATION FILED FEB. 18, 1904.

I 3 SHEETS-SHEBT 2.

PATENTED JAN. 3, 1905.

J. G. HEHR.

PORTABLE'SGAFFOLD.

APPLICATION FILED FEB. 18, 1904.

3 SHEETSSEEET 3 l anucn foz 5 Fm (M5130 /vihwooeo: 9% m ZMW UNITED. STATES Patented January 3, 1905.

JOHN G. HEHR, OF NEW YORK, N. Y.

PORTABLE SCAFFOLD.

SPECIFICATION forming part of Letters Patent No. 779,362, dated. January 3, 1905.

Application filed February 18, 1904:. Serial No. 194,240.

I T on whom, it may concern:

Be it known that 1, JOHN G. HEHR, of the borough of Brooklyn, county of Kings, city and State of New York, have invented certain new and useful Improvements in Portable Scafiolds, of which the following is a specification, reference being bad to the accompanying drawings, wherein- Figure 1 is a front elevation of a device embodying my invention. Fig. 2 is a side elevation of the same. Fig. 3 is a section on the line 3 3 indicated in Fig. 1, showing the track and carrier. Fig. 1 shows means for inserting additional lengths of track for the carrier. Fig. 5 is a sectional View taken on the line 5 5 indicated in Fig. 4. Fig. 6 is a side elevation of an end connector for the track-irons.

This invention relates more particularly to a scafiold in which are provided supportingwheels for permitting it to be moved from place to place and which wheels can be so adjusted that when the scaffold is suspended from the upper part of a building they will engage the side of the same and prevent its being damaged and also facilitate the lateral movement of the scaffold.

Referring now to the drawings, the car A is formed of a number of bars of metal of suitable size for a workman to perform the necessary operations therein. The car hasa suitable bottom and also a hinged bar 12, to be secured in place after the man has entered the car, which will prevent his falling out.

On each of opposite sides of the car is attached a bracket 13, having holes in their end portions, at which portions they engage hooks 14 on the side bars of the car A. When the car is supported above the ground, the brackets hang alongside of the car and are secured in this position by means of plates 16, extending under the bottom of the car, which plates have slots therein in which enter the ends of levers 17, mounted on the bottom of the car. To the lower end of each of these brackets 13 is journaled a wheel 18, having rubber tires, which wheels are vertical when the brackets are secured to the side of the car, as just described. These wheels being on opposite sides of the car constitute wheel-supports for the car, so that the same can be readily moved from place to place, as desired. Another wheel, 19, can be removably attached to a third side of the car by suitable brackets 20, so that the car will stand alone and can be more easily moved about.

When the car has been suspended from a building, the third wheel 19 is removed. and the two wheels 18 will bear against the side of the building and facilitate the vertical adjustment of the car and prevent injury to the wall from the car; but when it is desired to move the car sidewise the brackets 13 are swung up to a horizontal position, as indicated in broken lines in Fig. 1. They are each pivotally held in this position by a short arm 21, secured to each bracket 13, to which arm is hinged a longer arm 22, having a hooked extremity 23, that engages a hole in the side member of the car, as shown in the drawings. By this means the brackets can be swung into a horizontal position and the wheels brought into engagement with the side of a building. They are adjusted in this position by ropes 2 1, that are wound on cleats 25.

On each side of the car is an arm 26, extending first outward and then upward and having a short inwardly-extending bend 27, carrying

pulleys

28 and 28 To one of these arms and the frame of the car are secured a pair of bars 29, between which is hung a drum 30, carrying a ratchet-wheel 31, engaged by a ratchet 31; The shaft of the drum 30 carries a large gear 32, that meshes with a small gear 33 on a stud-shaft 34, which latter also carries aband-wheel 35. A brake-shoe 36 engages the periphery of the band-wheel, whereby the workman can control the rotation of the drum when the unwinding of the latter by the rope causes it to rotate.

The car is suspended from a carrier that runs on a track composed of two angle-irons 37 37, suitably secured together at their ends, where they carry

pulleys

38 and 38. They are braced at intermediate portions by crossstrips 39. (Shown best in Fig. 3.)

The carrier consists of a bar 10, having each end forked, as indicated in Fig. 3, which forks carry rollers 41, that run on the upper side of the irons 37. On the ends of the carrier are

pulleys

42 and 43. A pair of hooks are secured to the ends of the carrier for the purpose of suspending the same when desired and also for attachment of the ropes that draw the carrier along the track.

A rope or cable 45 has one end attached to one end of the arm 27 of the car and passes first around the pulley 42, thence over the pulley 43, then down and around the pulley 28, and is Wound around drum 30. By this means the car is suspended from the movable carrier and its vertical position is adjusted by rotation of the drum 30 winding up the rope 45 or paying it out. When the ratchet 31 is released from the ratchet-wheel 31, the weight of the car will cause rope to unwind from the drum 30; but the latter will rotate the bandwheel rapidly, whose movement can be readily controlled by the brake-shoe 36.

Near the bottom of the car A is a shaft 46, carrying loosely a pair of

drums

47 and 48, each having a ratchet-wheel 49, controlled by a ratchet-lever 50, that are in position to be operated by the feet of the workman. A series of radial bars or spokes 51 are arranged on the drums, by which the latter can be turned by the feet of the workman. A rope 52 is secured to one end of the carrier, thence passes around the pulley 38 at the end of the track, thence around pulley 27, and then down to and around the drum 47. Another rope, 53, has one end attached to the other end of the carrier and passes around the pulley 38, thence through a toggle-clutch, and then to and around the drum 48. This toggle-clutch is composed of a pair of

links

54 and 55, pivoted between the side bar and a lever 56, and another pair of

links

57 and 58, that are pivoted between the side bar and the lever 56, the

links

54 and 56 having adjacent eccentric faces that are grooved, whereby the rope will be secured when the links are straightened by the lever 56.

When it is desired to shift the car laterally, the lever 56 is raised, releasing the rope, and one of the ratchet-levers 50 is also raised, allowing its drum to unwind, while the other drum is turned by the foot of the workman, so that it will wind the rope thereon. This will cause the car and carrier to be shifted sidewise, and the other rope will consequently unwind from its drum, the weight of the car being sustained by the rope 45. Thereupon the lever 56 is lowered, clamping the rope 53 between the cams.

Where additional length of track is desired,

, sections of double angle-irons are provided,

59 they will turn and extend somewhat transversely thereto and prevent the withdrawal of the connector.

The track is suspended from the building by suitable cables that may have hooks engaging holes in the cross-strips 39 or other suitable means.

When the brackets 13 are secured to the side of the car with the wheels lowered, the arms 22 are placed in an upright position and suitable boxes 64 are supported thereby by having a hook 65 on the side of the boX engaging an apertured portion of the arm 22, and also an eye 68 engages the hook 14.

A suitable seat 66 is adjustably secured on the upright bar a of the car.

What I claim is 1. In a portable scaffold, the combination of a car, means for supporting the car alongside of a building, and wheels vertically arranged on the car that project beyond the lowermost portion thereof and that also project beyond one vertical side of the car, whereby they will engage the side of the building and will also support the car from the ground in its normal position.

2. In a portable scaffold the combination of a car, means for supporting the car alongside of a building, wheels connected with the car, and means for adjusting the wheels whereby they will be disposed either in a vertical plane and project below the car, or in a horizontal plane in which position they will project beyond one side of the car.

3. In aportable scaffold, the combination of a car, means for supporting the car alongside of a building, a pair of brackets each carrying a wheel, the brackets being hinged to the car whereby when the brackets are in one position the wheels will engage the side of the building, and when the brackets are swung to another position the wheels will form a support for the car from the ground.

4. In a portable scaffold, the combination of a car, means for supporting the car alongside of a building, a pair of brackets each carrying a wheel, the brackets being hinged to the car and so arranged that when hung clownward the wheels will be vertical and form supports for the car from the ground, and means for supporting the brackets in a horizontal position whereby the wheels engage the side of a building.

5. In a portable scaifold, the combination of a car, means for supporting the car alongside of a building, a pair of brackets each carrying a wheel, the brackets each being hinged to the car and so arranged that when hung down the wheels will be vertical and form supports for the car from the ground, means for pivotally supporting the brackets in a hori- Zontal position whereby the wheels can engage the side of the building, and means for adjusting the brackets to move the wheels to and from the building.

6. In aportable scaflold, the combination of a car, means for supporting the car alongside of a building, a pair of brackets each carrying a wheel, the brackets being hinged to the car and s0 arranged that When hung down they form supports for the car from the ground, means for supporting the brackets in a horizontal position whereby the Wheels can engage the side of a building, and a third Wheel removably attached to the car for sup- I0 porting it from the ground.

JOHN G. HEHR.

Witnesses:v

JOHN A. PAULsoN, R. S. THROOKMORTON.