US1683247A - Screed support - Google Patents

Description

Sept. 4, 1928. 1,683,247

V.G.H.GROTHE SCREED SUPPORT Filed March 19, 1927 1 kid i i I I --4 I 1 l I l I F1521. I i I l i {-0 i 1 15' In i 22 i /7 A TTORNEK Patented Sept. 4, 1928. r

- UNITED STATES VERNER G. H. GROTHE, OF ST. PAUL, MINNESOTA, ASSIGNQR T HAROLD I; IEAGrIEY- i OF ST. PAUL, MINNESOTA, I

' SGBEED SUPPORT. 1

Applicationfiled March 19, 1927. Serial No. 176,805.

My invention relates to screed supports used in concrete construction and the object is to provide a simple, efiicient and easily adjusted device of said kind. Another object is to further improve on my United States screed support Patent Number 1,592,681, issued July 13, 1926.

In the accompanying drawing: r

Fig. 1 is afront elevation and Fig. 2 a side elevation, (slightly modified) of my improved screed support.

Fig. 3 is an enlar ed partly sectional detail about ason line 33 in Fig. 2.

Fig. tis a sectional View as on line H in Fig. 2 showing a top view 01 the base or my device.

Fig. 5 is a modification of Fig. 4 and Fig. 6

is aside elevation of Fig. 5.

Fig. 7 is a side-elevation of the telescoping members of my device, partly in section, and including details of the locking bar of my device.

Referring to the drawing by reference numerals: 10 designates a preferably circular base plate which may be raised or dished upwardly and has an integral vertical post 11 with a rack 12 in one side. 13 is a tubular post member slidable on the post 11 and its I jecting outwardly to encase a semi-circular tiltable cam 16 having an arm 17 projecting outwardly through a slot 15A in the housing. Said'cam has an interior straight face 16F the lower part of which is formed with inwardly directed teeth 15T adapted to engage the teeth of the rack 12 when said cam arm 17 is lowered as to full line position in Fig. 3, but said teeth being non-engaging when the cam and arm is raised to dotted position shown. The teeth 15'1 may, of course, be engaged with the rack to hold member 13 and its clip 14: at any desired elevation.

In Fig. 1, 18 is a wood screw projecting downwardly concentrically from the base 10 to be screwed into the wooden floor supporting forms (not shown) used in concrete floor construction. The base may also have round apertures 10A as in Figs. 2 .and 4: for drawscreed after the clip 14: is set to a predeter-- ing nails 19 into such floor form, or triangular holes 101 may be punched'in'saidbase and the triangular piece of metal bent down to form a prong 101 also for the same purpose of holding the base rigid.

20, shown 'lotted in Fig.1, represents a floor screed laid in the clip 1 1 and resting 7 Several screed supports may be necessary to support one on the bottom of the latter.

screed and it is obvious that all of them may be adjusted until the screed is absolutely level. Parallel rows of screeds may thus be laid parallel and in a common plane,

1 21, is a heavy wire or metal arm normallyupright and having its lower end suitably pivotally connected as at 22 to the outer end of the cam arm 17 and its upper-end is formed with an inwardly directed prong Said prong may be driven into the mined height through the aperture from whence the tongue ltT' has been bent.

In Fig. 7 the lower end of tube 13 has an enlargement 18E adjacent the tooth rack 12 said enlargement being tapered downwardly and'having an-opening adjacent the bottom end of said tube, to form the pivot'point engaging in the bottom of the V-shaped lower part of the adjustment bar 21X. This bar has an inner arm 21X withinsaid enlarged part 13E the upper end of said arm having inwardly directed teeth 15T to be swung into and out of engagement with the racklZQ VJ hen the prong 21? is driven into the screed it is obvious that the rack is securely engaged by said teeth 151".

In the use of my device, it will be readily understoodthat a number of my devices are secured in the floor supporting forms, screeds laid in the clips thereof and all adjusted to proper level. Then concrete is poured in the form to a leveljust below the bottoms of the clips 14, so that the tongues 141 of the latter serve as anchors to support the upper parts of the screed supports when the concrete hardens about them.- It is further ob-' vious that when the concrete has hardened or i set the screeds will remain in a true plane and flooring may'subsequently be laid on the screeds. Itwill be understood that the small prongs 10]? of Fig. 6, or the nails 19 or screwv 18, Fig. 1, will project below the ceiling after the form-boards areremoved but these arev I claim 1. A' screed support comprisinga base with an integral vertically disposed post, an upper tubular member slidable on said post and having a screed supporting U-shaped clip at its top end, the said post having a toothed rack, rack engaging means on the tu-bular member adapted to engage the rack at any desired elevatromszud latter meanscomprising further an upright element with a horizontally directed prongada iited to be driven into a screed supported by the dcfvice.- w

,2. Thestructure specified in claim 1, in which said rack engaging means comprises a cam with teeth adjacent the rack, said cam oscilliable within a housing formed on said tubular member and having an outwardly directed arm to be engagedfer oscillatingsaid cam into and out oi engagement with the -3-"lhe structure specified in claim 1, in

wl 7 ch said rack engaging means comprises a cam with teeth ad a-cent the rack, sald cam oscillable within a housing formedon said tubular member and having an outwardly directed arm to be engaged for oscillating said cam into andv out of engagement with the rack, said,uprightelement comprising a bar with its lower end pivotally connected with v5. A screed support comprising a normally uprightmember, means for securing said at a redetermined height and an upwardly member upon a substantially horizontal support for concrete, a screed holder-ad ustable vertically upon said member, toothed means extending lon itudinally on said member,

means associatedwithsaid screed holder and movable into and out 0t engagement With said toothed means for retaining the holder projecting arm operatively connected to said whereby said engaging means may be oper-' ated to adjust the height of said holder. 7 6. A screed supportcomprising a-scree'd spacing member, meansfor securing one end of said member upon a form for concrete, screed'holder ad ustable toward and away i roin said formupon the other'end of said member, teeth disposed longitudinally on said member, means movable into and'out of engagement with said teeth for retaining said holder'in predeterminedposition upon said spacingmember, an-arm operative'ly' connected tosaid tooth engaging means and pro jecting' out from the normal surface of concrete upon saidi'orm and means on the outer end o'l said arm-for retaining said tooth engagingmeans in engagement with said teeth.

7. A screed support comprisn'g a post, means for securing an end of said post upon a support for concrete, a U shaped screed holder upon the other end of said post, telescoping members ofsaid post adapted to be extended and retractedto adjust the spacing ofsaid holder relative to said support, means for re-.

tainingl said holder in predetermined positions relative to said support and manually operable means connected to said retaining means and projecting out from the normal surfaceof concrete upon said form whereby said retaining means may be operated to ad'- just the relative positions of said holder and support after concrete has been poured in said support. V

8., A screed support comprising a post, means for securing an end. of said post upon a support for concrete, a screed holder upon the otherend of said post, telescoping mem bersol said post adapted to be extended and retracted to adjust the spacing of said holder relative to said support, means for retaining said holder in predetermined position relative to said support and an. arm connected to said retaining means and projecting out from the normal surface of concrete upon said form whereby said retaining means may be operated toadjust the height of said holder without removing a screed held; in said holder, "In testimony whereof I aflix my signature.

VERNER o. n. enom-nit} GERTHFEATE OF CURRECTWN.

Patent No. 1,683,247. Granted September 4, 1928, to

VERNER G. H. GROTHE.

It is hereby certified that the above numbered patent was erroneously issued to "Harold L. i agiey, of St. Paul, Minnesota," Whereas said patent should have been issued "one-haif to Fred i], Hoiman, of St. Pan Minnesota, and one-half to Healy-Rufi Company, oi St. Paul, Minnesota, a firm composed of Dennis L. Heaiy and De Witt G. Ruff," as assignees by mesne assignments, of the entire interestin said invention, as shown by the records of assignments in this office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 6th day st November, A, D. 1928,

M. J. Moore,

(Seal) Acting Gommissioner 0i Patents.

Images