fig1 is a top view of the upper clip 1 of the hair cutting guide 20 . fig1 illustrates a first exterior ridge 5 , a second exterior ridge 6 , and a third exterior ridge 7 . fig2 is a side view of the hair cutting guide . fig2 illustrates that the second exterior ridge of the upper clip is raised above the other exterior ridges . referring back to fig1 first exterior groove 8 and second exterior groove 9 can be viewed . fig1 a is a top view of the lower clip 2 of the hair cutting guide 20 . as will be noticed , fig1 a is identical to fig1 . fig1 a illustrates first exterior ridge 12 , second exterior ridge 13 , and third exterior ridge 14 . referring to fig2 again , it will be seen that the second exterior ridge 13 is raised above the third exterior ridge . fig1 and 1a illustrate the thumb grips 10 of the upper clip and 11 of the lower clip respectively . fig1 a illustrates the first exterior groove 15 and the second exterior groove 16 of the lower clip 2 . fig2 illustrates the lower clip 2 and the pivot pin 3 . upper clip 1 and lower clip 2 rotate about the pivot pin 3 when the thumb grip 10 and the thumb grip 11 are urged toward each other against the resistance of spring 4 . fig3 is an end view of the hair cutting guide 20 illustrating the pivoting end thereof . coil spring 4 resides about pivot pin 3 and contacts thumb grip 10 and thumb grip 11 . specifically , the spring 4 contacts the interior of the thumb grip 10 and the interior of the thumb grip 11 . hair is gripped by the teeth of the hair cutting guide and scissors may be used to trim hair using the guide as a supporting surface upon which to cut . the upper and lower clip have identical exterior dimensions . when the clips grip the hair , either longitudinal edge may be used as a guide for the scissors . referring to fig2 one such longitudinal edge is shown and is defined by exterior ridge 7 of the upper clip 1 and exterior ridge 12 of the lower clip 2 . fig3 also illustrates the first pivot support 23 of the upper clip 1 and the second pivot support 24 of the upper clip 1 . fig3 also shows the first pivot support 28 for lower clip 2 and the second pivot support 29 for lower clip 2 . the first and second pivot supports for lower clip 2 are integral with the lower clip 2 . the first and second pivot supports 23 and 24 for the upper clip 1 are integral with the upper clip 1 . fig4 is an end view of the hair cutting guide illustrating the hair gripping end portion thereof . fig4 illustrates the first exterior ridge 5 , the second exterior ridge and the third exterior ridge of the upper clip 1 . similarly , fig4 illustrates the first exterior ridge 12 , the second exterior ridge 13 , and the third exterior ridge 14 of the lower clip 2 . fig4 illustrates how the second exterior ridges 6 and 13 of the upper and lower clip respectively , are raised relative to the other exterior surfaces . fig4 also illustrates the first interior groove 21 of upper clip 1 , the second interior groove 22 of upper clip 1 , the first depressed shoulder 30 of lower clip 2 , the second depressed shoulder 31 of lower clip 2 , and the interior groove 27 of lower clip 2 . fig5 is a side view of the hair cutting guide illustrating the upper and lower clip pivoting around the pivot pin 3 so as to open the hair cutting guide to receive hair to be cut . the position of the upper and lower clips is achieved by applying force on the thumb grips 10 and 11 by the hands of a person . also shown in fig5 are the second raised exterior edge 6 of the upper clip and the second raised exterior edge 13 of the lower clip 2 . depressed shoulder 31 is illustrated and when the force to hold the hair cutting guide is removed the third interior toothed ridge 17 abuts the second depressed shoulder 31 of the lower clip 2 . fig5 also illustrates the first interior toothed ridge 26 of the lower clip 2 . fig6 is a view of the upper clip of the hair cutting guide which illustrates a bottom view of the gripping end and a cross sectional view taken along the lines 6 -- 6 of fig2 illustrating the pivoting end . fig6 illustrates the interior of the upper clip 1 . first interior groove 21 , second interior groove 22 , first interior toothed ridge 19 , second interior toothed ridge 18 , and third interior toothed ridge 17 of the upper clip are shown in fig6 . this portion of the upper clip is discussed herein as being the gripping end portion of the upper clip 1 . the pivot pin 3 is illustrated and it is pressed fit into the supports 23 , 24 of the upper clip 1 and supports 28 and 29 of the lower clip 2 . fig7 is a view of the lower clip 2 of the hair cutting guide 20 which illustrates the bottom view of the gripping end and a cross sectional view taken along the line 7 -- 7 of fig5 illustrating the pivoting end . fig7 illustrates the first interior toothed ridge 26 of the lower clip for mating with groove 21 of the upper clip . fig7 also shows the second interior toothed ridge 25 of the lower clip for mating with the groove 22 of the upper clip 1 . first depressed shoulder 30 and second depressed shoulder 31 of the lower clip 2 are also illustrated in fig7 and they interfit with the third interior toothed ridge 17 and the first interior toothed ridge 19 of the upper clip 1 . fig2 illustrates the hair cutting guide in its closed position . in this position the hair of a person will reside in the spaces formed by the teeth of the ridges of the upper and lower clips . in the preferred embodiment the teeth of the upper and lower clip align such that there is a clear passageway between the teeth for the hair . in this way the hair cutting guide grips or clamps the hair uniformly such that the hair does not bunch up or become otherwise diverted within the hair cutting guide . in the preferred embodiment the upper and lower clips of the invention are manufactured from plastic . the pivot pin is press fit into the supports of the upper and lower clip . it will be understood by those skilled in the art that the clip could be made from many different materials . it will be understood by those skilled in the art that many changes and modifications may be made to the invention without departing from the spirit and scope of the appended claims . it will be understood by those skilled in the art that the invention has been set forth by way of example only and the foregoing example is not meant to act in any way as a limitation on the scope of the appended claims .
a hair cutting guide comprising an upper clip and a lower clip is disclosed . a pivot pin interconnects the upper and lower clips allowing rotation of the upper and lower clip with respect to each other . a spring is mounted around the pivot pin and engages the upper and lower clips and urges them into engagement with each other . the upper clip includes a toothed ridge and the lower clip includes a groove which mates with the toothed ridge . the lower clip also includes a toothed ridge which mates with a groove in the upper clip .