US1767335A - Plasterer's corner-bead setter - Google Patents

Description

June24,1930. l H. RWILCOX 1,767,335

PLASTERERS CORNER BEAD SETTER I Filed Jan. 5, 1928 3nv'entor HOMER R.wu..cox

' Qttomegs Fat ented June 24, 1930 UNITED STATES *HOMERR. wILoox, or w g crr z', orrro PLASTERERS CORNER-BEA!) SETTER Application filed January 5,1928. Serial a... 244,607.

To neatly plaster a projecting vertical cor ner requires a very. skilled workman, much time and great care. If a vertical projecting corner is not accurately plastered espe wall paper. To make the job of plastering easier there has been invented the now widely used corner bead consisting of a strip ofsheet metal bent longitudinally in trough fashion perforated in the webs or wings and having a bead longitudinally at the corner. The corner bead is fitted at the corner of meeting walls to be plastered, the bead proper serving to fix in advance the limits of the plastering on the two walls. But this expedient gave rise to the new problem of preliminarily fixing the cornerbead so that it might stand in an accurately vertical position. The use of plumb line was commonly resorted to but success in securing verticality is rare because the line necessarily stands away from the intended corner and the 'eye was ultimately relied on. The use of the plumb line also consumes- A number of devices have been much time.

proposed or patented for positioning the corner bead, hence the object of my invention is to provide an improved tool by means of which distortion or defects in the corner bead 3 canbe first detected and the bead discarded or straightened and then quickly and accurately set without a high degree of skill on the part of the setter.

The inventionis embodied in the example herein shown and described, the features of novelty being finally claimed.

' In the accompanying drawing-- 7 Figure 'l is a view in rear elevation show ing the invention-applied to a cornerbead.

Fig. 2 is a plan view looking at the upper end thereof on a larger scale than appears in Fig. 1. v

Fig. 3'is a rear View of fractions taken from near the middle of the holder showing details.

Fig. 4 is a top plan view of the upper end of the device showing added to the gripping members means for latching said members in such relation to each other that the device may be used as a straight edge.

In the views 5, 5, designate the-bodies of the .latchin latching position until intentionv the gripping members, said bodies being con-. veniently' formed'of long'pieces of wood or metal having their forwardedges mainly straight" and fiat andtheir rear portions formed for convenient manipulation. The flat portions of the forwardedges can'be each lined with a stripof'brassas at 6, 6 if the gripping bodies be made of wood. 7

The forward edges of the gripper bodies are connected by a suitable number of hinges, v the leaves of which are indicated at 7 7 and the pintle at 8. Around the pintle of each hinge is secured a coil spring 9, under tension, the extended ends of which press against the hinge leaves with a tendency to throw the body parts toward a common plane. The forward adjacent corners of the bodies are grooved or out out, as best shown at 10, 10, a Fig. 4, to fitv on the beaded portion 11 of the corner bead and firmly grip them in prac- .7 0 tice as best shown in Fig. 2." 7

7 Each of the body portions, 5, 5, is provided near its middle with a spirit-level glass 12'. set in opening 13 and ata right angle to a line of the forward" edge of the body so that when, ,75 as hereinafter described, both said vedges are i Vertical the bubble of the glass will appear at the middle of the glass thus insuring that the cornerbead held by the gripping member is in substantially vertical position. The 8.9

fact that the bubble of one of the gripping bodies when holding a corner bead appears in the middle of'its glass would notbe evidence that both forward edges are in vertical position, hence these glasses cooperate with each otherin indicating proper verticality for the corner bead contained in the instrument.

The character 14: designates a hook on the rearedge of one of the gripper bodies and V 15 a headed pin on the other to be engaged bythe hook to latch. the gripper bodies in position as shownin Fig. 4' so that the tool can be used asa straightedge, its forward edge or edges serving in an obvious manner for this purpose. 'The pressure of the springs of the hinges being, as heretofore pointedout, to cause the bars to tend to go 7 toward a common plane will aid in holding ally removed.

i "iv In practice the corner bead will be placed tire lengths, spring means tending to hold in the instrument as shown in Figs. 1 and 2 said bars in corner bead gripping position, and the inner angle of the bead supplied with and means for latching said bars with their a suitable coating of plaster of Paris forward faces in substantially the same lane.

promptly after which the corner bead, While still in the instrument, will be applied to the corner of the two walls to be plastered. In doing this due reference will be made by the workman to the two bubbles and proper adjustment of the instrument will be made by,

him to make sure that the corner bead is set in vertical position. The plaster of Paris upon hardening fixes the corner bead in position but such fixing can be aided by a nail or two at thetop and bottom driven through 7 holes in the corner bead. An advantage of theconstruction is that because the forward faces of the corner bead setter contact with the flanges as well as the intermediate bead any defects in the corner bead are detected, and is discarded or its defects rectified before application to the corner. 7

The forms of the parts can be changed without departing from the gist of the invention as claimed.

WVhat I claim is:

1. An instrument for setting a plasterers corner bead including a pair of substantially continuous bars having flat forward faces, said bars hinged togetherlongitudinally at adjacent corners and adapted at said faces to grip the corner bead, including the flanges thereof throughout substantially their entire lengths, and spring means tending to hold said bars in corner bead grippingposition.

'2. An instrument for setting a plasterers corner bead including a pair of substantially continuous bars having flat forward inwardly beveled faces, said bars hinged together longitudinally at adjacent corners, said corners provided with grooves, and said bars adapted at said faces to grip the corner bead, including the flanges thereof throughout substantially their entire lengths, and spring means tending to hold said bars in corner bead gripping position.

3. An instrument for setting a plasterers corner bead including a pair of substantially continuous ba'rs having flat forward inwardly beveled faces, said bars hinged together longitudinally at adjacent corners and adapted at said faces to grip the corner bead, including the flanges thereof throughout substantially their entire lengths, spring means tending to hold said bars in corner bead gripping position, and means for latching said bars with their forward faces in substantially the same plane.

4. An instrument for setting a plasterers corner bead including a pair of substantially continuous bars having fiat forward faces, said bars hinged together longitudinally at adjacent corners and adapted at said faces 7 to grip the corner bead, including the flanges thereof throughout substantially their en- HOMER R. NILC X.

Images