US2122263A

US2122263A - Guard for scraper devices

Info

Publication number: US2122263A
Application number: US70208A
Authority: US
Inventors: Frank V Pinter
Original assignee: Briggs Manufacturing Co
Current assignee: Briggs Manufacturing Co
Priority date: 1936-03-23
Filing date: 1936-03-23
Publication date: 1938-06-28
Anticipated expiration: 1955-06-28

Description

June 28, 1938. v PlNTER 2,122,263

GUARD FOR SCRAPER DEVICES Filed March 23, 1956 Eem" "mm" lNvENToR [7d /,5 [4h/[7d M Z' 1 AM BY @M75/u1;

I I 2" ATTORNEYS.

Patented June 28, 1938 ETED STATES PATENT OFFlCE Briggs Manufacturing Company,

Detroit,

Mich., a corporation of Michigan Application March 23, 1936, Serial No. 70,208

Claims.

This invention relates to guards for Scrapers and has for one of its principal objects the provision of a retractable guard on a hand scraper to protect objects from accidental contact With 5 the blade of the scraper when the blade is not 1n use.

Scrapers using extremely sharp blades, such as razor blades, are utilized in industrial establishments and elsewhere for numerous purposes, such as removing accidentally applied spots of paint from the windows of automobile bodies, and continual use of such sharp edged tools leads to carelessness in their handling, resulting in those using the scrapers occasionally cutting themselves more or less seriously. One of the purposes of the present invention is to provide a means for preventing such accidents, the means consisting of a guard which automatically projects out beyond the blade whenever it is not deliberately retracted.

Another object of the present invention is to provide a scraper blade guard which is held in retracted position by the pressure applied to press the scraper against the surface being worked on, so that substantially no additional effort on the part of the worker is needed to use a scraper with a blade guard.

Other objects of this invention will appear in the following description and appended claims, reference being had to the accompanying drawing forming a part of this specification wherein like reference characters designate corresponding parts in the several views.

Fig. 1 is a perspective view of a scraper embodying the present invention, the guard being shown in extended position.

Fig. 2 is a plan View of the scraper shown in Fig. l with the guard retracted.

Fig. 3 is a sectional view on the line 3--3 of Fig. 2, taken in the direction of the arrows, with the position of the parts when the guard is in extended position being shown in dotted lines.

Fig. 4 is a sectional view on the line 4 4 of Fig. 2, taken in the direction of the arrows.

Before explaining in detail the present invention it is to be understood that the invention is not limited in its application to the details of construction and arrangement of parts illustrated in the accompanying drawing, since the invention is capable of other. embodiments and of being practiced or carried out in various Ways. Alsol it is to be understood that the phrase-ology or terminology employed herein is for the purpose of description and not of limitation, and it is not intended to limit the invention claimed herein beyond the requirements of the prior art.

In the embodiment of the invention shown in the drawing the body I0 of the device is preferably made of at metal stock shaped to pro vide an elongated shank Illa and a transverse head Illb. Wooden hand grip pieces II, I2 are riveted on the two sides of the shank Illa. to form a smooth comfortable handle and to make the tool more rigid.

A standard double-edged razor blade I3 is secured to one side of the head IIlb by means of a clamping plate I4, a screw I5 extending through a hole in the plate and through the central hole in the razor blade to hold the three members tightly together and a pair of lugs IIIa projecting integrally from the rear edge of the plate extending through short slots IB in the head to keep the clamping plate I4 and the razor blade I3 square with the head IIlb.

The guard I'I comprises a metal plate slidable on the opposite face of the head I 0h from the clamping plate I4 and having its forward edge Ila turned down so as to lie almost in the plane of the blade I3. Thus, when the guard I'I is slid out and extends beyond the blade I3, it effectively shields the cutting edge, and it Will slide back past the edge when it is retracted. The ends of the guard I'I are bent down to form flanges I'Ib extending alo-ng the side of the head I Db and the clamping plate I4 to guide the guard I'I in its sliding movement. Lugs IId on the edges of the flanges IIb` are bent under the head Illb` and the clamping plate I4 to hold the guard I1 onto the head Illb. The center of the guard I'I is provided with a slot I8 through which the screw I5 holding the clamping plate III to the head Il'lb` projects. The slot I8 is of suitable length so as to be engaged at its ends by the screw to limit the normal travel of the guard in opposite directions.

At each side of the central slot I8 in the guard lugs I'Icl are struck up from the metal thereof, these lugs providing means for connecting the mechanism for moving the guard I'I in and out. This mechanism comprises a spring-wire bail I9 whose ends I9a are pivoted in holes in the lugs I1c and whose central portion I9b is pivoted in a lever 20 mounted on the shank Illa. The lever 20 is formed of sheet metal with depending flanges 20a through which pass the bail I9, a pivot pin 2I forming the fulcrum. The fulcrum or pivot pin ZI is carried by the arms 22a of a U-shaped bracket which projects up through holes in the shank and lies between the anges 20a on the sides of the lever 20, the central portion 22b of the bracket 22 lying below a slightly raised portion of the stock l and being spot welded thereto. A small coil spring 23 encircles the pivot 2l and acts on the lever 20 to lift it and normally hold the guard I1 forward to cover the blade I3.

When the tool is in use, the workman grasps the handle with his fingers and places his thumb on the lever 2Q, pressing it down to retract the guard Il and pressing the blade l'3` against the surface to be scraped, the same pressure serving the two purposes. As soon as the tool is removed from the work, the workman unconsciously or automatically releases the pressure on the lever 20, and the guard l1 springs back into place. It will thus be seen that I have provided a guard which is practically automatic in its operation and which does not depend upon anyones' memory for its efcacy.

I claim:

l. A scraping device comprising a flat stock, means to clamp a blade against one face of the stock with an edge of the blade projecting beyond the end of the stock, a guard slidably mounted on the stock so as to be movable between a position in which it projects beyond the blade and a position in which the blade projects beyond the guard, a manually operable lever to retract the guard, and spring means associated with said lever to move the guard into its projected position.

2. A scraping device comprising a flat stock, a clamping plate on one face of the stock, a blade between the clamping plate and the stock, a at guard slidably mounted on the other face of they stock and having a hole therein, means for maintaining said guard normally in projected position to shield the forward edge of the blade, and a clamping screw passing through the clamping plate andthe blade and threaded through the stock to clamp the blade in place, the end of the screw projecting into the hole in the guard to limit the movement of the guard, the hole being large enough to allow the guard to slide between its operative and inoperative positions.

3. A scraping device comprising a flat stock, a clamping plate on one face of the stock, a blade between the clamping plate and the stock, a at guard slifdably mounted on the other face of the stock and having a hole therein, spring means for maintaining said guard normally in projected position to shield the forward edge of the blade, manually controlled means for retracting said guard to uncover the forward edge of said blade, and a clamping screw passing through the clamping plate and the blade and threaded through the stock to clamp the blade in place, the end of the screw projecting into the hole in the guard to limit the movement of the guard, the hole being large enough to allow the guard to sli-de between its operative and inoperative positions.

4. A scraping device comprising a flat stock, a clamping plate on one face of the stock, a blade removably supported between the clamping plate and the stock, a at guard slidably mounted on the other face of the stock and having a hole therein, spring means for maintaining said guard normally in projected position to shield the forward edge of the blade, and manually controlled means for retracting said guard to uncover the forward edge of said blade, said manually controlled means comprising a pivoted operating member and a bail detachably connecting said operating member and said guard.

5v. A scraping device comprising a handle, a blade secured thereto and having its edge extending transversely with respect to the handle, a guard movable with respect to the blade and arranged to extend out beyond the edge of the blade, a lever pivoted to theV handle on a fulcrum whose axis is substantially parallel tothe edge of the blade, and a connection to retract the guard when the lever is moved toward the handle.

FRANK V. PINTER.