US1140673A - Tunneling-machine. - Google Patents

Description

W. W. GIGGEY.

TUNNELING MACHINE.

APPLICATION FILED MAR. 13, 1912.

1,140,673. Patented May 25, 1915.

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W. W. GIGGEY.

TUNNELING MACHINE.

APPLICATION FILED MAR.13,1912.

Patented May 25, 1915.

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WITNESSES:

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1H5 NORRIS PETERS co.. PHOTOJJTHQ, WASHINGTON, D. C.

M OL C A TTORNEY.

W. W. GIGGEY.

TUNNELING MACHINE.

APPLlCATiON FILED MAR. 13. 1912.

1,140,673. Patented May 25, 1915.

4 SHEETS-SHEET 3.

TNESSES: INVENTOR. 3*" 1-4, 499

THE NORRIS PETERS 60., FHoTO-LITHQ. WASHINGTON. D. c.

W. W. GIGGEY.

TUNNELING MACHINE.

APPLICATION FILED MAR. 13, 1912.

1,140,673. Patented May 25, 1915.

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WALTER W. GIGGEY, OF NETHERLAND, COLORl-XIDO.

TUNNELING-MAOI-IINE.

Specification of Letters Patent.

Patented May 25, 1915.

Application filed March 13, 1912. Serial No. 683,520.

To all whom it may concern:

Be it known that I, WALTER W. GIGGEY, a citizen of the United States, residing at Netherland, in the county of Boulder and n State of Colorado, have invented certain new and useful Improvements in Tunneling-Machines, of which the following is a specification.

This invention relates to new 'and'useful improvements in tunneling-machines and more especially in the class of machines in which a plurality of reciprocating hammers have a percussive action upon the rock which it is desired to penetrate.

The invention has for its object to provide an apparatus of the class named in which simplicity of construction is combined with durability and thorough practicability in use and which, to this end, consists of the features hereinafter described, all of which will be fully understood by reference to the accompanying drawings in the various views of which like parts are similarly designated and in which,

Figure 1 represents a plan view of my improved apparatus, Fig. 2 a central, vertical, longitudinal section thereof, partly in elevation, Fig. 3, a face view of the revoluble head included in the construction, and the thereon arranged percussion hammers, Fig. 1, a cross-sectional view of the tunnel, showing the structure which supports the screw by means of which the machine is advanced into the bore, Fig. 5, an enlarged transverse section taken along the line 55, Fig. 1, Fig. 6, a side elevation of the bearing which supports the revoluble head of the machine,

Fig. 7, a fragmentary section along the line 77, Fig. 6, Fig. 8, a section taken along the line 88 Fig. 7, and Fig. 9, a vertical sectional view of one of the adjusting supports of the carrying truck.

Referring to the drawings by numerals, the carrying truck 2 is composed of a rec tangular frame 3 which is vertically adjustably mounted upon'four supports 4. The latter, which are best shown in Fig. 9 of the drawings, consist each of a hollow, cylindrical pedestal 5 which is formed in its upper extremity with an internal screw-thread for the reception, of an adjusting screw 7 which is rotatablysuspended from the frame 3.

The pedestals 5 which are su ported upon revoluble wheels 6, project with their upper extremities, into correspondingly shaped sockets"? which are formed in theframe 3,

and the screws 7 are operatively associated with hand-levers 8, by means of a ratchet and pawl movement in a manner similar to that of the ordinary jack-screw. The operatmg levers 8 on the four supports extend normally in slots 9 cut in the sides of the frame 3 where they are accessible, when it is desired to elevate all or part of the frame and the thereon supported operating mechamsm.

The hammer-head 10, which carries the drills 12 by means of which the rock is disintegrated, consists of three parallel disks 13, 13 and 13 which are firmly secured upon the end of a horizontal, hollow shaft 1 1, which is revolubly mounted in journal bearings 15 upon the truck 2. The head 10 is furthermore supported upon a carrier 16, which consists of two segmental plates 17 which are'joined below the head 10 and which, in practice, are movably supported upon the floor of the tunnel by means of revoluble wheels 18. The upper ends of the plates 17 connect with the lower extremities of two segmental arms 19 whose upper ends terminate in adjacency to each other above the head and are connected by means of a bolt 20. Suspended from the last named member by means of an eye bolt 21 is a ring 22 which concentrically surrounds the middle disk 13 and is formed in its inner sur-' face, with a ball run for the reception of anti-friction balls which engage the concave outer edge of the disk 13 The carrier 16, which in the above described manner serves to relieve the bearings 15 of the greater part of the wearingstrain caused by the weight of the head 10, is rigidly connected with the truck 2 by means of anchor-bolts 23, whose extremities are secured in lugs on the segmental plates 17.

The pneumatic drills 12, are each composed ofa cylindrical housing 12 in which a piston has a reciprocating movement and which is rigidly secured to the disks 13 and 13 The piston rods which protrude beyond the extremities of the housings 12 terminate in chucks 24 which serve to connect the percussion hammers 25, whose angular shanks 26, project through corresponding openings in the foremost disk 13. The various drills 12 are arranged on the head so that thecenters of their chucks are disposed in circular concentric series, and the hammers, whose serrated working faces are oblong, are secured in, the respective chucks the supporting structure, While, by regulation of the ad] ustable supports 4, the frame 3 of the truck 2 may be placed at any selected elevation or angle of inclination, for the purpose of directing the head 10 in accordance With the proposed direction of the tunnel.

It should be understood that While I have shown and described my invention in the best form now known to me, various changes in the form, proportion and arrangement of the parts comprised in the construction, may be resorted to Without departing from the principle of this invention.

I am aWare that it is old to cut the breast of a tunnel in concentric, overlapping circles by the use of vibratory hammers, and I do not claim this feature broadly, but

What I do claim and desire to secure by Letters-Patent is:

1. In a tunneling machine, the combination With a carrying truck, of a Wheeled the truck, a head on said shaft supported i Within the said bearing, and a plurality of reciprocating hammers on said head.

2. In a tunneling machine, the combination With a carrying truck, of a carrier independently supported in advance thereof and comprising a circular member having surface Wheels and a ball bearing ring suspended therein, a shaft rotatably supported upon the truck, a head rotatably supported upon balls Within the said ring, and a pluriality of reciprocating hammers on said hea In testimony whereof I have affixed my signature in presence of two Witnesses.

WALTER W. GIGGEY.

Witnesses:

JOHN R. WOLFE, E. A. LATORRA.

Copies of 'this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0.

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