US168146A

US168146A - Improvement in tunnels

Info

Publication number: US168146A
Authority: US
Publication date: 1875-09-28
Anticipated expiration: 1892-09-28

Description

0. B. DOWD.

TunneL PatentedSe men-1875 No. I68,l46.

WITNESSES ATTBBNER N.PETF.RS, PHQTO-UYHOGRAPHER. WASHINGYON. D. O

g is a specification:

- to the OLNEY B. Down; or. "NEW-YORK, N. Y.

PATENT OFFICE.

' rMPaovEMENT' IN TU'NNELS.

Specification forming partof Letters Patent No. 168,146, dated September 28, 1875; application filed 7 i M August 6, 1875.

(Lisa B.

To all whom it may doncem Be it known that I, OLNEY B. Down, of the city, county, and State of New York, have invented new] and useful Improvements in Tunnels, Sewers, &c, of which the following My invention consists, essentially, of the construction of the walls of tunnels and sewers of sections of elliptical tube, this form being employed to allow otcarrying the sections through the previously-constructed part place where they are to be added in the construction'of tunnels under river-beds,

and in other places where the only access to the work is through the completed portion of i e the tunnel. The invention also comprises certain means of conveying the section's along the tunnel; also, means of fastening the sections and packing them, and also a contrivance for holding the cage or case employed in advance of the wall for digging "out the bore from being pressed back by the pressure l on the head of the case.

Figure 1 is a longitudinal. section of a portion of a tunnel, and the tunneling-case emit ployed in advance of it. Fig. 2 is a detail section of the tube forming the tunnel-walls. Fig. 3 is a transverse section through the tun- V neling-case. Fig. 4 is a detail, in section, of

the joint between the tunnel and the tunneling-case.

Similar letters of reference indicate corresponding parts.

A is the case or shield employed for boring the tunnel, and containing the apparatus for that purpose, and' also being the place in which the tube B, with which the tunnel is lined, is set up. It is a round or elliptical shell of metal, having a head, 0, at the front end, whenworking in places much exposed to water, but may be open'for dry tunneling, and at the rear end has an opening of the size and shape of the tube B, and a packing, D, and follower or packing-ring surrounding it, topack around the tube water-tight. F represents the sections of the tube, one of which is seen in position to be connected with the previously-formed tube, and another is represented in the position in which the sections are carried into the case on a truck, consisting of two independent plates, G, each having two wheels, H, and being detachably clamped to the ends of the sections F by a bolt, 1, so that a section of the tube forms a portion of the truck itself when in working condition, and being taken out of the truck when it has arrived in the place for being set up, the other portions of the truck are less cumbersome to return past other incoming tube-sections-to the mouth of the tunnel than they would'be, together with other devices necessary to make a complete truck independently of the tube-sections. These tube-sections are grooved on one end, as at a, and tapered at the other end, I), to match tightly one with another, and pack with lead d, and

they are screwed up tight by lugs e and bolts f, or other fastening-for instance, a twoheaded link, g, and notched lugs h, the link being elongated by heat, to be applied to the lugs, and drawing them up tight by its contractions in cooling; but in many the sections will be so pressed together by their weight and the earth as not to need any fastenings. J represents stop-pins, to be used for preventing the case from being pressed back on thetun-- nel by pressure against its head, the pins be- 1 ing screwed or otherwise projected out from the inside, as shown, through holes, to be afterward stopped in any approved way.

- The apparatus attached to the head of the case represents some of the means employed for boring out the tunnel, and is described in another application for a patent filed by me simultaneously with this.

Havin g thus described my invention, I claim as new and desire to secure by Letters Patent 1. The tunnel-tube consisting of sections B,

having an elliptical form and smooth exterior surface, and lugs and fastenings or connecting devices on the inner surface, as shown and described, whereby a section may be conveyed through a completed portion of the tube Without impediment, as set forth,

2. The combination of the tunnel-sections B, of elliptical form, and the enlarged case A, as shown and described, whereby the sections may be introduced through the portion 5.Thc combination of packing 1) and folof tunnel previously made, and. fitted together lowerE with the tunnel B and the case A, subin the case. stantially as specified.

3. The combination of the stop-pins J with tunnel B and tunneling'case A, substantially v OLNEY B. DOWD.

as specified.

4. The trucks o H and clamping bolt I, Witnesses: combined and arranged for coupling with a T. B. MOSHER, tube-section, substantially as specified. s ALEX; F. ROBERTS.