US494909A - wallis - Google Patents

Description

3 SheetsSheet 1".

(No Model.)

J. E. WALLIS. ROAD MACHINE.

No. 494,909. Patented Apr. 4, 1893.

3 Sheets-$heet 2.

J. E. WALLIS.

N0 Model.)

ROAD MACHINE.

3, Sheets-Sheet 3'.

(No Model.)

J. E. WALLIS.

ROAD MACHINE.

No. 494,909. Patented'Apr. 4, 1893.'

.Zhrrezzio): Mar/Z7726 77522293",

Unitas 'lA'lES .ionnuunnsr WALLIS, or BASINGSTOKE, ENGLAND.

ROAD MACHINE.

SPECIFICATION forming part of Letters Patent No. 494,909, dated April 4, 1893.

Application filed August 23,

a subject of the Queen of England, residingat Erdesley, Basingstoke, in the county of lIants, England, have invented an Improvement in Road-Machines,of which the following is a specification.

My invention relates to a machine for picking and loosening the surfaces of roads wherein one or more picks or picking tools is or are made to operate by a reciprocating percussive action upon the surface of the road so as to penetrate to a sufficient extent into the same to break it up. The said tools are for this purpose arranged to be alternately raised and dropped or forced downward by steam or other power acting upon pistons or lever arms to which the tools are attached or the tools are placed so as to receive the stroke from such pistons or lever arms. When several tools are employed, they may be actuated either consecutively or simultaneously.

The said apparatus can either be combined with an ordinary road engine or steam roller,

the steam from which is made to actuate the picks or picking tools, or the apparatus can be mounted by itself on wheels and be worked either by steam from a boiler on the vehicle, or by a motion derived by gearing from the road wheels.

From the above it will be seen that the said machine can be constructed in a variety of ways for carrying out the purposes of the invention; by way of example I will describe some of the arrangements which I prefer to employ, for which purpose I will refer to the accompanying drawings.

Figure 1 shows a side elevation of one arrangement, as applied to a steam roller. Fig. 2 shows a front view of the picking apparatus the cylinders and the pickin tools being viewed in the direction a Fig. f, and the foot of the cylinder casting B in the direction I). Fig. 3 is a detail side view showing a modification of my invention. Fig. 4 is a detail end elevation, and Fig. 5 is a detail side elevation showing another modification.

To the side or end of asteam roller or road engine A of any known construction is fixed by a foot B a casting B constituting three steam cylinders arranged side by side, and

1892. sennuolnasm. (NomodeL) each containing a piston O, the piston rod D of which carries at its lower end the picking tool E. a head F keyed on it whichslides on a guide G fixed to the cylinder and to which is pivoted a socket piece II in which is secured the picking tool E.

The socket piece H is connected to the head F by a pin I the head being made to fit with a semicircular end surface against a corresponding hollow of the socket piece H so'that the shock of impact in operating is taken by these surfaces and not by the pin I. The hollow of the socket piece also bears with a straight side against the one straight side of the head F, while the other side of the socket piece is open. It is held with the straight side abutting against the head by means of a spring J connecting the two parts as shown. When in this position the center line of the picking tool E is by preference made to form a small inward angle with the center line of the piston red, as shown, for a purpose to be presently stated.

I Steam is supplied to the slide chestof the cylinders B by a pipe K, and is admitted to the cylinders by ordinary slide valves L, actuated by elbow levers M pivoted to the guide G the cranked short arm of which lever is connected to the slide rod, whilethe long arm is slotted, and engages with a stud N- on the head F of the piston rod, so that by the reciprocating motion of the latter avibrating motion is imparted to the lever M, causing the slide valve to be moved so' as to alter-v nately admit steam on either side of the pis- The piston rod has forthis purpose ton, and thus to effect the reciprocating motion of the picking tool so that on this being propelled downward by the steam pressure it is caused to penetrate to a certain extentinto the road surface. Owing to the before mentioned slightly angular position of the picking tool E relatively to the piston rod, it will be seen that as the-steam roller advances with the apparatus in thedirection of the arrow, the tool holder H will not be liable to give way at its pivot I when the tool strikes the ground, as it might do if the tool were in line with the piston rod, thereby preventing effective penetration. After being driven into the ground by the percussive action, the tool 2 eegeoe and socket will turn on the center pin I firstly into the position in line with the piston rod, and then in being dragged along, it will turn still farther on its pin and will operate with a-certain leverage upon the ground in front of it so as to break it up. ()n being withdrawn by the upstroke of the piston, the tool E will at once be drawn back into its original position by the spring J.

The tool E is secured in its holder 11 by means of two loops X X in an open groove of the holder through which loops it passes. The loops are connected togetherby a bar X and they are formed on screw bolts X that pass through the holder II and are provided with nuts as shown so that by screwing these up, the loops will nip the tool tightly in the groove of the holder, the end of the tool being made to butt against the end of the groove, with or without the intervention of packing pieces for adjustment.

When the apparatus is not in use the pistons and their picks are held in theraised position by means of lever arms 0 pivoted at O to the guides G through slots in which they are made to project underneath the end of the head F by means of a forked screw rod Z carried by brackets B on the cylinders as shown. Then the apparatus is to be set to work, the lovers 0 are moved downward by the rod Z until they are out of the groove of the guide bar in which the head F works. The exhaust from the steam cylinders is led from the exhaust chamber P through a pipe Q to the smoke box of the boiler. The angle at which the cylinders and picks are .shown inclined to the ground line is that which has been found to be most advantageous; they may however be inclined at other angles, or they may even be arranged vertically. The steam cylinders might also be made single acting, raising the piston against the action of a helical springinterposed between the end of the cylinder and the piston rod head, which spring would then effect the working downstroke.

It will be evident that various other arrangements of valves may be used for Working the steam cylinders.

Fig. 3 shows a side view and Fig. 4 a part front view of an arrangement in which the picks E are carried at the ends of lovers or arms R pivoted at R to an inclined frame S the lower end of which is carried by road wheels S while the upper end is pivoted at S to the engine framing A. On the frame S is mounted a shaft T carrying cams T and receiving rotary motion from the engine gearing by pulleys and belt or pitch wheels and chain U U U The cams'l" in revolving act on lugs R on the lovers R so as to raise these together with the picks into the dotted position shown at Fig. 3; on the cams leaving the lugs, the lever arms with the picks fall down and penetrate the road surface as shown, the force of the downward motion being increased either by a weight Vas at l igsi3 and 4or by a spring V as at Fig. 5. The lever arms R are guided in their motion by guides IV fixed to the frame S, and when not in use they are held in the dotted raised position by suspending them from eyes W" on the top bar of the guides.

The above described arrangement of the picks or picking tools might also be carried on a single vehicle the road wheels of which would impart the requisite rotary motion to the cams T by pitch wheels and chain or other suitable gearing.

Having thus described the nature of my invention and the best means I know for carrying the same in practical effect, I claim 1. A machine for pecking or loosening the surface of roads and similar hard surfaces consisting of one or .more peeks or picking tools operated by the pistons of fluid pressure cylinders or equivalent means so as to act percussively or with blows upon the said surface, the said pecks or picking tools being jointed and free to turn on a pivot at right angles to their axes and mounted on wheels so as to travel over the road while they operate thereon, substantially as described.

2. In a machine for pecking or loosening the surface of roads, and similar hard surfaces the combination of a peck E pivoted to a head on the piston rod D of a cylinder 0 worked by fluid pressure, a spring J tending to hold the peck E against a stop on the head F, a guide G for guiding the piston rod head F and peck E in their motion, a slotted lever M actuated by a stud on the head F and controlling the slide valve L of the cylinder 0, and a vehicle A carrying a supply of fluid pressure, substantially as described.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 12th day of August, A. D. 1892.

J OIIN ERNEST l/VALLIS.

Witnesses:

CHARLES D. ABEL, Chartered Patent Agent, 28 Southampton Buildings, London, W'. C.

J NO. 1.. M. MILLARD, Clerk to Messrs. Abel ch Immy, Consulting Engineers and Patent Agents, 28 Southampton Buildings, London, W. O.

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