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Publication numberUS875396 A
Publication typeGrant
Publication dateDec 31, 1907
Filing dateJun 19, 1907
Priority dateJun 19, 1907
Publication numberUS 875396 A, US 875396A, US-A-875396, US875396 A, US875396A
InventorsHerbert E White
Original AssigneeGen Fireproofing Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Clamp for use in building construction.
US 875396 A
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Description  (OCR text may contain errors)

PATENTED DEC. 31, 1907.



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Specification of Letters Patent.

Patented Dec. 31', 1907.

Application filed June 19, 1907. Serial No. 379,706.

- citizen of the United States, and a resident of Youngstown, Ohio, have invented certain new and useful Improvements 1n Clamps for Use in Building Oonstruction, of which the following is a specification, accompanied by drawings.

This invention relates to a clamp for use in building construction, and is adapted to be used more particularly in concrete building construction.

The invention has for its object the providing of a simple means for making an anchorage in ceilings from which to suspend peavy weights, as hanging shafting and pul- The nvention is also used for holding in place the reinforcing metallic members in concrete construction r In the erection of buildings of this character it is necessary to maintain the steel memhere in a certain relative position so as to insure their proper location in the concrete body. It is also desirable to fasten them together and this invention is used to perform at the same time the office of holding the steel parts in place with respect to their position in the concrete body, of fastening these parts togethdr and of maintaining the members at the required distance apart. The clam also serves to hold the bottom mold boar s in position while the concrete is being formed about the reinforcing frames or members.

The invention is fully illustrated in the accompanying drawings, in which,

Figure 1 is a longitudinal elevation partly in section of a reinforced concrete beam or girder embodying the invention; Fig. 2 is a transverse sectional view of Fig. 1 on the line no .r; Fig. 3 is a transverse sectional view of a modification of the invention. Fig. 4 is a transverse sectional view of another way of using the clamp shown in Fig. 3. I

Referring to the drawings A represents the longitudinal base members of a pair of me- 'tzl lhc reinforcing frames or members, and m this instance the members A comprise metallic rods or bars shown rectangular in cross section, although they may be any desired cross section.

Connected to the base members A by means of slats or tie pieces B are the upper longitudinal members O, w 'ch, as shown, comprise central portions 1),

outwardly extending portions E which extend from each end of the central portions D anddiverge from the base members A, so that the distance between the base members and l the portions E continuously increases as the outer ends of the reinforcing frames are approached. Preferably the extreme ends-F of the, upper member (3 extend substantially parallel to the base A. In constructing the beam the central portion D of the member C is placed upon the central portion of the base member A and the two members are tied together in any suitable manner. The slats B may be secured to the longitudinal members in any desired manner. If desired, addi tional reinforcing slats or ribs G may be provided extending outwardly from the upper members C and-suitably secured thereto in any desired manner. frames are preferably arranged side by side and secured together by means of the clamps he reinforcing which form the object of the present invention.

In Fig. 2 one form of clamp is shown, comprising the upper jaw or clamping member J provided with grooves K adapted to receive the longitudinal members A of the frames, and the lower clamping member L also provided with grooves 0 adapted to receive the longitudinal members A. The grooves K and 0am constructed to substantially register with each other and cooperate to tightly clampthe. members A in defined position when the clamp it tightened up. The up er member J is provided with a screw threa ed socket P adapted to receive the. end of the screw threaded bolt Q, a screw-threaded aperture R in the lower or main clamping member L. The bolt is rovided With'a head S by means of whic it may be tightened, and between the head and the member L is adapted to be secured the mold board T. Preferably the up er clamping member or jaw J is recessed at U toreceive the projecting head )ortion V of the main clamp member L with a small clearance to prevent concrete from getting down around the screw-threaded bolt. It should not be necessary to make any closer fit than can be made in ordinary foundry ractice. It will be seen that the rojection V forms a protecting collar for tile bolt, which also prevents the concrete from coming in contact therewith. v r

In Fig. 3 a modified form of clamp is I shown adapted to be used in connection with reinforcing frames having two or more main members located one'above the other. in this instance, the clamp is shown in connection with two reinforcing frames each having the two longitudinal members A.-

The upper clamping member a is provided with the grooves b to receive the upper base members A of the frames, while the lower clamping member or main member 0 is provided with grooves d to receive the lower longitudinal members A of the frames. The upper member a is provided with an interiorly' screw-threaded sleeve e adapted to receive the screw-threaded bolt f. This sleeve 6 is adapted to extend down into the central aperture g in the member with a small amount of clearance, and this construction protects the bolt from the concrete and prevents'the concrete from getting down around the screw. If the longitudinal base members A of each frame'are apart as shown in Fig. 4, they can be held in position when in the clamps by inserting between them any pieces of metal h of the desired thickness, as v waste ends of bars from the scrap heap.

According to this construction, after the concrete, cement, or other cementitious material is hardened sufliciently to firmly unite all the parts, the bolts and mold boards may be removed and the clamps form screw threaded sockets for the reception of iasten-' ings for heavy weights or for ceilings.

erases I claim and desire to obtain by Letters Patent the following:

1. A clamp for concrete constructionscomprising the upper and lower members, one of said members having a socket,'the other member having a projection fitting into the socket to form a closure therefor and prevent access of concrete to the socket, and a bolt passing centrally through said projection and socket, and screwing into the the lower member being constructed to prevent access of concrete to the bolt.

in testimony whereof I have signed this specification in the presence of two sub scribing witnesses.


a bolt socket, and screwing into the upper member, 4

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2737802 *Oct 17, 1950Mar 13, 1956Johannes BakkerComposite prestressing reinforcement
US2772560 *Jun 28, 1952Dec 4, 1956Herman P NeptunePick-up device for pre-cast concrete slabs
US3091897 *Aug 19, 1959Jun 4, 1963Superior Concrete AccessoriesCable hold-down anchor device
US3230678 *Oct 29, 1962Jan 25, 1966Superior Concrete AccessoriesHold-down anchor device for prestressed grouped cables
US3270471 *Oct 10, 1961Sep 6, 1966Prescon CorpPost-tensioning apparatus for prestressing concrete
US3281999 *Apr 12, 1962Nov 1, 1966Daniel KeelyPrefabricated building construction
US3712014 *Nov 27, 1970Jan 23, 1973Waerner TEmbedded anchoring socket
US4947613 *Jun 15, 1989Aug 14, 1990Siegfried FrickerRetaining device
US5473849 *May 24, 1993Dec 12, 1995Materials Technology, LimitedBuilding wall and method of constructing same
Cooperative ClassificationE04B1/4107