US1421807A - Spacing bar - Google Patents

Description

F. L. METZGR.

SPACING BAB. APPLICATION mfp FEB. 8, 1921.

Patented July 4 im! @wma @C /W @i NETE@ STT FRITZ L. METZGER, OF AVLON, PENNSYLVANIA.

SPACIITG BAR.

Application led February 8, 1921.

To all whom-t may concern.'

Be it known thatI, FRITZ L. Mnfrzonn, a citizen of the United States, residing at Avalon, in the county of Allegheny and State of Pennsylvania, have invented new and useful Improvements. in Spacing Bars, of which the following` is a specification.

y invention relates to spacing bars used in concrete building construction for spacing the reinforcing bars used therein.

It is one object of this invention to provide a spacing bar having supporting legs formed therefrom without materially weakening the metal strip or bar from which it is made. Another object is to provide the legs with the surfaces in contact with their supports sufficiently broad to prevent them from sinking into the said supports. Another object is to provide means whereby the spacing bars may have their height or depth increased by simple supplemental legs. Other objects appear hereinafter.

Referring to theaccompanying drawing, Fig. l is a perspective view of a portion of the preferred form of my improved spacing bar with two reinforcing bars applied thereto; Fig. 2, a side elevation of a spacing bar and its supporting means, with a reinforcing bar attached thereto; Fig. 3, a cross-section of Fig. 2 on the line III-III; Fig. 4, a side view of a portion of a spacing bar with a supplemental leg applied thereto and shown in vertical section; Fig. 5, a cross-section of Fig. 4f on the line V-V; and Fig. 6, a perspective view of a portion of' a second form of my spacing bar.

On Figs. l to 5 of the drawing, nates a strip or bar of sheet metal having any. suitable cross-section. I have shown the strip 1 with an inverted V-shaped crosssection, as illustrative of my preferred crosssection. At suitable intervals along the bar 1 opposite slits are made near the edges, as at the places 2, and the strips of metal between each slit and the edge nearest thereto is bent outwardly transversely from the plane which includes both lateral edges of the bar to form the legs 3. The legs are merely drawn out from the body of the bar 1 and each leg is integra-l therewith and throughout their length, that is, from one end of the adjacent slit to the other end thereof. Preferably the strips from which the legs are made are slightly twisted as they are forced out of their original positions so as to have their outer faces or lowest 1 desig- Specication of Letters Batent.

Patented July et, 1922.

serial No. 443,344.

portions, that is, the portions having the greatest displacement, lie from edge to edge in contact with their support 4;. The legs have a comparatively large area in contact with the support 1, thereby preventing them from sinking into the support by the weight superposed on the bars. While the bending of the legs from the bars so as to present the edges of the strips to the support 4 comes within my invention it has not the full advantages of the preferred form of the legs rst described herein. Preferably the displaced metal is forced from the body of the bar by a movement normal to the support t. y

The longitudinal center line of the bar l is provided with the tongues 5 lying preferably between each pair of legs 3, the tongues being formed out of the body of the bar 1. One end of each tongue is left integral with the body while the free end thereof is bent out from the body to form a seat for-a reinforcing rod 6. The reinforcing rods rest on the body 1 beneath the tongues which are bent down over the rods to form retaining and clamping means to hold the bar 1 and the rods together.

The spacing bars may, if necessary, be secured to their support in any suitable manner, as by driving into the support e a nail or other headed device 7 through each slot 8 made by the formation of a tongue 5.

In order to space the bar 1 at a greater distance from its support then can be effected by the legs 3 alone, I may provide the supplemental device 9 having the central member 10 seated in the pairs of slots 11 left by forming of the legs 3. The ends of the member 10 entend downwardly to form supplemental legs 12 having the feetv 13 below the legs 3. The central member 10 fits the pairs of slots preferably so as to prevent any appreciable lost motion between the bar 1 and the device 9. The feet 13 are preferably turned so as to rest flatly on their support 14C to prevent their sinking into the support.

On Fig. 6, I have shown the legs 3a bent directly from a flat spacing bar la and preferably at right angles thereto, the legs being at both ends integral with the bar 1a and continuous from end to end. The lowest part of the legs 3a constitutes feet adapted to rest from edge to edge on their support so as to furnish as broad a contact as possible therewith. I have shown in all the figures legs aro-shaped, but they may obviously have a different shape in order to increase the area of contactwith their support; for example, the are may have a longer radius 0r it may be somewhat flattened, as shown on Fig. 2.

I claim:

l. In a spacing bar for reinforced concrete construction, a V-shaped bar of ductile sheet metal having at opposite edges thereof a series of one-piece legs bent therefrom at the sameside of the bar and integral therewith at both ends, the outer faces of the legs being arranged in the same plane whereby they may contact from edge to edge with a support therefor.

2. InV a spacing bar for reinforced concrete construction, a bar of ductile sheet metalv having at opposite edges thereof a series of one-piece legs bent therefrom at the same side of the bar and integral therewith at bot-h ends, in combination with a headed y device extending through slots inthe bar.

3. In a spacing bar for reinforced concrete construction, a bar of ductile sheet metal havingrat opposite edges thereof a series of one-piece legs bent therefrom at the same side of the bar and integral therewith at both ends, in combination with a series of tongues integral With the bar and lying at the side of the bar opposite that from which the legs extend, and a headed device extending through some of the slots left by the forming of the tongues.

4. In a spacing bar for reinforced concrete construction, a bar of ductile sheetv metal having at opposite edges thereof a series of one-piece legs bent therefrom at the same side of the bar and integral therewith at both ends, whereby slots are provided between each leg and the adjacent portion of the body, in combination with a supplemental device extending through two slots at opposite edges of the bar and having supplementallegs thereon extending beyond the first legs.

5. In a spacing bar for reinforced concrete construction, a bar of duetile sheet metal having at opposite edges thereof a series of one-piece legs bent therefromY at the same side of the bar and integral therewith at both ends, whereby slots' are provided between each leg and the adjacent portion of the body, in combination with a supplemental device extending through two slots at opposite edges of the bar and having supplemental legs thereon extending beyond the first legs, the supplemental device tting the said slots so as to prevent substantial lost motion between the bar and the said device.-

Signed at Pittsburgh, Pa., this 3rd day of February, 1921.

FRITZ L. METZGER.

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