US892320A - Portable asphalt plant. - Google Patents

Description

PATBNTED JUNE so, 1908.

2 BHBIT8SHBBT 1.

INVENTOR: mew 5. 5mm; A 4; Mm

P. B. SMITH. PORTABLE ASPHALT PLANT.

APPLICATION FILED MAB..27'.1906- WITNESSES:.

nil uonnls rrrrns cm, \nnnnorun, t.

No. 892,320. PATENTED JUNE 30,1908.

F. B. SMITH. PORTABLE ASPHALT PLANT..

APPLIOA'IION IILED MAE.Z'7.1906.

2 SHEETS-SHEET 2.

' FZGI.

WITNESSES: mvemom Ffi/IMY B. SMITH,

uypnoamn FITIRS 0a., wlwilfmbl, n c.

UNITED sTATEs PATENT oEEioE.

FRANK B. SMITH, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE BARBER ASPHALT PAVING COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF WEST VIRGIN IA.

To all whom it may concern:

Be it known that I, FRANK B. SMITH, of Philadelphia, in the State of Pennsylvania,- have invented certain new and useful Improvements in Portable Asphalt Plants, whereof the following is a specification, reference being had to the accompanying drawm 's.

It is important that portable asphalt plants should be fitted with hoisting apparatus whichis used for various purposes, as for instance, for hoisting the asphalt in order that it may be deposited into the asphalt tank with which the apparatus is provided. These portable asphalt plants have hitherto been provided with various forms of prime movers such as steam engines, gasolene engines, etc. and have also been provided with air compressors employed for delivering compressed air to the asphalt tanks, but no method has heretofore been devised whereby the compressed air with which they are pro vided may be utilized for the hoisting device. Instead thereof recourse has been had to the slower and more cumbersome methods of hoisting, as for instance, winches run by the prime mover. I have devised means whereby an air hoist can be incorporated as an integral part of one of these plants, and operated by air from the compressor, and have found that 'very marked advantages result from this device.

In the accompanying drawings, Figure 1, represents a longitudinal elevation, and, Fig. II, a partial plan view of a plant embodying my invention.

The plant is mounted upon a platform car 1, which carries the asphalt tank 2, mounted on one end thereof, and the sand driers 3, mounted on the other end. Between these are placed the sand hoist 4, and the mixer 5. All of these parts are of a construction previously described by me in prior patents or applications and need not be further described.

The car carries a prime mover 10, which as shown in Fig. II, consists of a small gasolene motor, which I have found a most convenient arrangement. The shaft 11, of the m0- tor is connected by the gears 12, 13, with an air compressor 14, which is used for various purposes in connection with the plant, and from which according to my present invention, I obtain the supply of compressed air required to operate the hoist which I will Specification of Letters Patent.

Application filed March 27, 1906.

PORTABLE ASPHALT PLANT.

Patented June 30, 1908.

Serial No. 308,258.

now describe. This hoist consists of a cylinder 15, which is mounted longitudinally be neath the platform of the car. It is conveniently secured to the frames 16, which support the car platform. The piston 17, of the cylinder carries sheaves 18, on its protruding extremity. Other sheaves 19, are suitably journaled near the other end of the cylinder. The hoisting cable 23, is anchored at 20, and after making one or more turns around the pairs of sheaves 18, and 19, is led around sheaves 21, and 22, which are in suitable relation to the hoisting derrick. This derrick may preferably be constructed of iron tubing as shown in the drawings, and comprises an upright 30, which is supported for rotation in suitable bearings 31, 31, which are secured to the side of the asphalt tank and is provided with collars 32, 32, resting on said bearings; to the upper end of the upright is attached the arm 33, the projecting end of which is additionally supported by the brace 34. The arm 33, of the derrick may thus be swung over different parts of the tank.

Small pulleys 35, 35, are journaled in the arm 33, and afford the necessary support for the hoisting cable of the derrick, the arrangement of which is otherwise clearly shown in the drawings.

Although I have shown the derrick on the side of the car immediately adjoining the asphalt tank, it will be understood that it may be placed elsewhere on the car, or if desired, two or more derricks may be mounted in different parts of the car, and by suitable arrangement of sheaves, the hoisting rope may be led to any of such derricks.

The compressed air for the operation of the hoist is led by the pipe 40, from the air compressor to the cylinder 15, of the air hoist. The operation of said cylinder is controlled by the hand valve 41.

By means of the combination as above described, I obtain a very quick-operating hoisting apparatus, and am enabled to mount it on a part of the car where it calls for no increase in the size of the car. The problem in 1plants of this description, is to compress a of the required parts for the plant within the comparatively small space provided by a single platform car. Floor space is therefore very valuable, and it is one great advantage of my invention that I am able to provide the plant with this eilicacious form of hoisting apparatus without employing any of the floor space, for the derrick being formedof tubing may be mounted on the side of the car, and the air hoist, as above described, is mounted entirely beneath the car body, so that its longitudinal thrust takes place in a plane where there is nothing to interfere with its operation.

Having thus described claim In a portable asphalt plant, a single car body, an air compressor and its operating means mounted on said car body; a cylinder and piston mounted beneath the car body; connections whereby the piston is operated my invention, I

by air from the compressor; a derrick mount ed on the car body; asheave on the end of the. piston, other sheaves fixed to the car body and a hoisting cable which after passing around the piston sheave is led over other sheaves to the extremity of the derrick, substantially as described.

In testimony whereof, I have hereunto signed my name, at Philadelphia in the State of Pennsylvania this 26th day of March 1906.

FRANK B. SMITH.

Witnesses:

FREDERICK A. HOLMES, JAMES H. BELL.

Images