US2718703A

US2718703A - Compass protector

Info

Publication number: US2718703A
Application number: US340815A
Authority: US
Inventors: Charles R Chilcote
Original assignee: Individual
Current assignee: Individual
Priority date: 1953-03-06
Filing date: 1953-03-06
Publication date: 1955-09-27
Anticipated expiration: 1972-09-27

Description

Sept. 27, 1955 c, CHILCOTE 2,718,703

COMIDASS PROTECTOR Filed March 6, 1953 IN V EN TOR. C'HAIQL E S E. CA /L COTE,

A T'TOENE VS.

United States Patent ()tfice 2,718,703 Patented Sept. 27, 1955 COMPASS PROTECTOR Charles R. Chilcote, Cincinnati, Ohio Application March 6, 1953, Serial No. 340,815

1 Claim. (Cl. 33-27) This invention relates to drawing implements, and more particularly to an improvement in drawing compasses.

The main object of the invention is to provide a novel and improved drawing compass which is provided with guard means to receive the point of the compass when the compass is not being used, the improved drawing compass being simple in construction, being inexpensive to manufacture, and protecting the user of the compass against injury from the compass point, as well as protecting the users clothing against damage from said point.

A further object of the invention is to provide an improved drawing compass, especially useful for students, the drawing compass being provided with guard means for at times housing the point of the compass and the pencil secured to the compass, whereby said point and the pencil are protected when the compass is not being used, the guard means being easily moved to an out-of-the-way position when its use is not required and when the compass is to be employed for drawing circles, arcs and the like.

Further objects and advantages of the invention will become apparent from the following description and claim, and from the accompanying drawings, wherein:

Figure 1 is a front elevational view of a drawing compass provided with guard means, constructed in accordance with the present invention.

Figure 2 is a side elevational view of the drawing compass shown in Figure 1.

Figure 3 is a front elevational view showing the compass in its inoperative position with the guard means housing the compass point and the point of the pencil carried by the compass.

Figure 4 is a plan view of a blank employed to form the guard member of the compass shown in Figures 1, 2 and 3.

Referring to the drawings, the drawing compass is designated generally at 11 and is provided with a first arm 12 which is formed with a lower portion 13 laterally offset relative to its top portion 14, said lower portion having rigidly secured thereto the compass point 15. Designated at 16 is a second arm which is pivotally connected at its top end to the top end of the first arm 12, as by the transverse rivet 17, the second arm being laterally offset to define the depending end portion 18 provided with the clamping sleeve 19 in which is secured the pointed pencil 20. The second arm 16 is formed at its intermediate portion with the arcuate scale 21 extending adjacent the first arm 12, as shown in Figures 1 and 2, and the top end of the first arm 16 is provided with the knurled handle 23 for rotating the compass around the point 15. The

arms

12 and 16 are further connected by a transverse headed rivet 24 which extends through respective overlapping

arcuate slots

25 and 26 provided in the upper portions of the

arms

12 and 16 below the transverse rivet 17.

Designated at 27 is the elongated, generally channelshaped guard member formed with the

parallel lugs

28, 28 at its end, said lugs receiving the intermediate portion of the first arm 12 therebetween and being pivotally connected thereto by the transverse rivet 29. As shown in Figure 4, the guard member 27 may be formed from a flat blank having a symmetrical shape relative to its longitudinal center line, indicated in dotted view at 30, said dotted line 30 also indicating a fold line on which the blank may be folded during the process of fabrication of the guard member. The blank 28 may be folded to a generally channel-shaped configuration, having a substantially V-shaped cross section, and the ends of the flanges may be further folded into contact with each other and crimped together, at 31, the joint between the ends being further secured by welding, soldering or the like. The side edges of the respective flanges of the guard member are formed with the respective elongated shallow notches, shown at 32, 32. With the guard member 27 thus secured to the depending arm 12, in the manner illustrated in Figure 1, it will be apparent that the guard member may be rotated downwardly from the position of Figure 1 to a position, such as that shown in Figure 3, wherein the clamping sleeve 19 enters the

notches

32, 32 and the point 15 and the pointed end of the pencil 20 are housed in the guard member when the

arms

12 and 16 are rotated towards each other to bring the point 15 into adjacency with the end of the pencil 20. As is clearly shown in Figure 3, the point 15 and the end of the pencil 20 are completely housed in the guard member 27, whereby the user of the compass is protected against injury from the point 15 and whereby the pencil point is protected against damage. When the compass is to be used, the guard member 17 may be swung to the position thereof shown in Figure l, exposing point 15 and and the point of the pencil 20.

While a specific embodiment of an improved drawing compass has been disclosed in the foregoing description, it will be understood that various modifications within the spirit of the invention may occur to those skilled in the art. Therefore, it is intended that no limitations be placed on the invention except as defined by the scope of the appended claim.

What is claimed is:

A drawing compass comprising a first arm, a depending pointed member secured to said first arm, a second arm, means pivotally connecting the top end portions of said arms together, a pencil, a clamping sleeve on said second arm clampingly receiving said pencil and securing said pencil to said second arm, an elongated, generally channel-shaped guard member located outwardly of and facing said first arm, parallel lugs at the end of said guard member engaging opposite sides of the intermediate portion of said first arm above the pointed member, and means pivotally connecting said lugs to said intermediate portion of the first arm so that said guard member is at times swingable downwardly and inwardly to receive said pointed member and said pencil, said guard member being substantially V-shaped in cross section at its intermediate portion to receive the pencil outwardly adjacent to the pointed member within said guard member, and being formed at its opposing edges with elongated shallow notches located to at times receive said clamping sleeve.

References Cited in the file of this patent UNITED STATES PATENTS 341,081 Weissenborn May 4, 1886 723,109 Willmott Mar. 17, 1903 936,157 Phenix Oct. 5, 1909 1,814,596 Hamel July 14, 1931 2,080,917 Hochman May 18, 1937 2,582,585 De Cesaris Jan. 15, 1952