US869036A

US869036A - Adjustable form for curved surfaces.

Info

Publication number: US869036A
Application number: US36987907A
Authority: US
Inventors: James Erastus Wood
Original assignee: Individual
Current assignee: Individual
Priority date: 1907-04-23
Filing date: 1907-04-23
Publication date: 1907-10-22
Anticipated expiration: 1924-10-22

Description

PATENTED OUT. 22. 1907.

J. EL WOOD.

ADJUSTABLE FORM FOR GURVED SURFACES.

APPLICATION FILED APR.23, 1907.

'INVEN T01? 0.7667729012 7450a? W/TNESSES A TTOHNE Y8 UNITED STATES PATENT OFFICE.

ADJUSTABLE FORM FOR CURVED SURFACES.

Specification of Letters Patent.

Patented Oct. 2'2, 190?.

Application filed April 23,l90' Serial No. 369,879.

To all whom it may concern:

Be it known that I, JAMns ERASTUS Wool), a citizen of the United States, and a resident of Pittsburg. in the able form for curved surfaces, for use in the construction of masonry and concrete bridges, culverts, tunnels, sewers, and in all places where it is necessary to use a supporting form during construction work.

A further purpose of the invention is to provide a construction of the character described, which is adjustal'ilc, any degree being obtainable, and wherein by removing oiplacing the various sections in position any length of span can be secured.

Another purpose otthe invention is to provide a construction that can be readily removed from the finished work, dismantled and transpm'ted.

Another purpose of the. invention is to provide a construction wherein the corrugated lagging employed gives the greatest possible strength for an equal quantity of material and weight, and wherein in the erection of small span arches no lagging is necessary.

The invention consists in' the novel construction and combination of the several parts, as will be hereinafter fully set forth and pointed out in the claims.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1V is a side elevation of the form adapted to a large span; Fig. 2 is a vertical section through one member of the form and the lagging arried thereby Fig. 3 is a perspective view of one of the members or sections of the form shown in Fig. 1; Fig. 4 is a section through a member of the form taken at right angles to the section shown in Fig. 2, and is likewise a longitudinal section through the lagging; Fig. 5 is a side elevation of the form adapted for small spans; Fig. (i isa side. elevation of one of the members or sections employed in theconstruction shown in Fig. 5, and Fig. 7 is a side elevation of a modified construction hereinafter more fully described. m The body of the device is made of a series of substantially triangular or loop-shaped rib sections A, I

which for long spans are preferably made of iron, al-' though a combination of material may be used, and

since all of the sections are similar in every respect,

only one will be described in detail. w

The sectionsA are usually placed side by side and have a hinge connection 10 at their upper opposing side surfaces, the pintlcs 11 being readily removable so that any desirednumber of sections can be coupled together necessary to the work in hand, but other forms of hinge connection may beemployed, as will be hereinafter described. Adjacent totho lower end or bottom surface the sections are connected by boltsl2 passed loosely through apertures 13 in their opposing faces, which bolts are provided with heads 14 engaging one surface and with nuts J5, 16 and 17; two of which are between the sections and the other at the free end of the bolt, as is shown in Figs. 1. and 5.

The curve of the arch desired, is obtained by tightening up or loosening the said bolts to produce a simple or compound curve of any degree. The bolts 12 may be straighter curved as occasion may demand.

In the detail construction of a section A as is shown in Figs. 2 and 3, each section consists of opposing sides .18 that diverge at their upper ends, the lower end portion of a section being curved to a greater or lesser de gree. A flat top plate 20 connects the two side pieces 18 at their upper ends, and this top plate 20. is provided with a slot 21 about centrally therein, and a lip 22 that extends from the forward or rear portion of the cap or top plate20, as is best shown in Fig. 3, and in this lip of wood 26 islocated within the upper portion of a section A, bearing against the under face of the cap plate 20, and at its bottom against a bolt 27 that is a fixture and which extends from side. to side of the section serving not only to support the block 26 but to strengthen the section.

In connection with each section A, a lagging B is employed, preferably constructed of metal, but which may be made sometimes of wood. This lagging B consists of a corrugated body portion 28 and a top plate 29 secured to the body, the top plate being smooth and flat. The lagging B may be made in sections-of varied lengths and the sections are held together by clips 30,

or their equivalents, as is. shown in Fig. 4, and the metal lagging'B is attached to the several sections A employed by set or logging screws 31 that are passed up through the apertures 23 in the lips 22 of the sections, into the body portion of the lagging, as is indicated in Figsll and 4. 4

In short spanarches for sewers, windows and the like, as is shown in Fig. 5, the bodies or the rib sections A are more pronouncedly triangular and are preferably constructed, of one piece of material, and the said sections A. are made very long horizontally, as is shown in Fig. 3, and their upper flat surfaces 32 serve as lagging, no auxiliary lagging being necessary. The blocks 26 are omitted, but the sections A have a hinge connection 33 that is usually similar to that shown in Fig. 1.

As many triangular sections A as are necessary to form I the arch are hinged or bolted together and all tie bolts K2 are securely tightened. I

In connection with the form of construction shown in Fig. 1, the turn-buckle 25 above referred to is used as a brace and is passed through the apertures 24 of the end sections A and secured by nuts 35 or enlargements, but any equivalent of the turn-buckle may be substituted. When as many rib sections as are necessary are connected, the corrugated iron lagging B is placed in position, and secured by the aforesaid set screws, 31.

When the device is to be removed from the masonry, several of the bolts 12 near the center of the arch are loosened and the turn-buckle is drawn inward until the arch center is disengaged from the finished work. When the lagging is of wood, it is secured by wood screws 35 to the blocks 26, as is shown in Fig. 2.

The triangular sections A or A need not be connected by the knuckle type of hinge, shown in Figs. 1 and 5, since a hinge connection may be provided of the type shown in Fig, 7. In said Fig. 7 a triangular section A is provided with a depression 36. in one side at the top, and with a corresponding projection 37 at the opposite side, and when a projection is iitted into a depression, a bolt 38 is passed through the engaging portions of the section, which bolts are provided with suitable nuts and the nuts are so placed upon the bolts that the bolts can have a little play, in order that the sections may be adjusted to the curvature oi the arch.

Having thus described my invention, 1 claim as new and desire to secure by Letters Patent,- 1. In forms for curved surfaces, a substantially triangular section having an upper flat cap plate, and provided with means at its upper side surfaces for adjustable connection with an opposing section, and means connected with one. of the side surfaces of the section at its lower portion for adjustable connection with the side surface of an adjoining section.

2. In a form for curved surfaces, a substantially triangular section having a flat cap plate at its upper end provided with openings therein, the side portions of the said section being provided with a series of apertures, the upper side portions of the section being provided with means for adjustable connection with an adjoining section, and means engaging one of the apertures in one of the side portions of the section and adapted for adjustable connection with the side of an opposing section. v

3. In an adjustable form for curved surfaces, a substan tially triangular section provided with an upper flat cap plate having a lip extension. means at opposite sides of the cap for adjustable connection with an adjoining Sii'ilnll,

and a block stationarily held within the section below the cap plate, the sides of the section being provided with a series of openings.

4. In a form for curved surfaces, a series of substantially triangular sections, adjustable connections between the upper portions of the said sections, and bolts provided with suitable nuts adjustably connecting the opposing lower portions of the said sections.

5. In a form for curved surfaces, a series of substantially triangular body sections, each provided with a cap plate at its upper end, adjustable connections between the upper portions of the said sections, bolts provided with suitable nuts adjustably connecting the opposing lower portions of the said sections. and a lagging secured to the upper portions of the said sections.

G. In an adjustable form for curved surfaces, a series of substantially triangular sections having means for hinged connection at their upper ends/and an adjustable connection between their upper and their lower ends.

7. In a form for curved surfaces, a series of triangular sections having adjustable connection at theirupper ends and adjustable connection between their lower ends, and means for drawing the lower ends of the sections in direction of each other.

8. In a form for curved surfaces, a series of triangular sections having adjustable connection at their upper ends and adjustable connection between their lower ends, means for drawing the lower ends of the sections in direction of each other, and a lagging removably secured to the upper portions of the said sections.

5). In a form for curved surfaces, a plurality of substantiaily triangular sections, each having an upper flat surface, adjustable connections between said sections at their upper opposing side surfaces, and means for adjustably connecting the lower portions'of said sections with each other.

10. In an adjustable form for curved surfaces, :1 plurality of sections, hinge connections between said sections at one end thereof, and adjustable connections between said sections adjacent to their other ends.

11. In a form for curved surfaces, a section having a Hat cap plate-at one end, provided with a lip extension, means at opposite sides of the cap plate for adjustable con nection with an adjoining section, a block held within the section and hearing at one end against the cap plate, and a bolt extending through the sides of the section and engaging' the other end of said block.

12. In a form for curved surfaces, a substantially triangular section provided with a fiat cap plate at one end having a lip extension formed with an aperture, means at opposite sides of the cap plate for adjustable connection with an adjoining section, a lagging resting on the said cap plate and a screw extending through the aperture in the said lip extension and engaging the lagging.

13. In a form for curved surfaces a plurality of sections having hinged connection at their upper ends, bolts provided with nuts and adjustably connecting the opposing lower portions of said sections, and a turn buckle extending through the lower ends of said sections.

In testimony whereof I have siened my name to this specification in the presence of two subscribing witnesses.

JAMES ERASTUS WOOD.

'Wi'tnesses .lnssis V. BRONSON, Mrs, L. K. C. GLoA'na.