US2377745A - Handle guide - Google Patents

Description

E.. BELANGER June 5, 1945 HANDLE GU I DE Filed Aprii 18 1944 Patented June 5,1945

UNITED STATES. PATENT OFFICE 3 Claims.

, My invention relates to a handle guide for files and other such tools of the same type which require to be fixed in precise relation to the article being worked, for example, in filing the teeth of a saw.

. The operator should have proper means to guide his hand and fingers so that when he is operating the tool there should be the least Variance in its motion. I have devised such a guide and in using same the operator is also saved the strain on his eyes due to the fact that he need not have his sight fixed permanently on the operation to detect or divert any faulty motion.

My handle guide is relatively cheap in construction and will perform a much. greater amount of work and a better quality of work in a given time.

These and other advantages will appear readily upon reading the specification together with the drawing, in which,

Figure 1 shows a side view of my improved handle guide with a file fixed in. position, and

Figure 2 shows a transverse out looking from the end of the file.

By referring to the drawing it will be seen that my invention consists in short in the provision of side positions on the handle which conform to the normal position the hand and fingers will take in operating or using a tool such as a file. The handle A consists of a gripping portion at the top which is rounded and of decreasing diameter towards the centre. This portion is gripped by the palm of the hand and the three fingers other than the index and thumb. Just below the narrowed centre point of th handle I provide a ridge I of a diameter about the size of the top of the handle. Below this ridge I I pro vide a depression 2 which has a diameter about equal to the centre narrowed portion of the handle. This is followed by a small ridge 3 which tapers out into triangular facet 4. The ridge I is a position or rest for the thumb and is provided on the top side with six cavities 5 of equal size to provide finger positions for fingers other than the index finger. On the other-side of the ridge in thedepression 2 I provide elongated It is important to note the relative ali nment of these cavities for the thumb andindex fingers. The division l ne between any two cavities 6 is opposite the centre of a cavity 5 in ridge I. This alignmentis made to correspond to the normal position the fingers should take on a handle when a tool is bein properly operated.

As a result of these fixed positions in fixed relation on the handle the operator is "assured in advance that he is holding thehandleproperly and need not apply constant pressure on the handle and keep his eyes fixedly on his work.

-It follows also that if a period of rest or a change in his job is necessary the operator can begin towork more quickly.

The smaller ridge 3 is tapered and has three facets 4 corresponding in number to the sides of the file B and in parallel alignment with them.

These facets 4 are so aligned that the division line between two facets is opposite the division line of a cavity 6 just above.

In the drawing I have shown a file B which is positioned in the handle A by inserting the point in the hole ,I in the centre of the bottom of the handle. It will be seen from the drawing that the alignment of the facets 4 fixes the normal relative position 'of the file to the handle so that the operator is assured that when he has gripped the handle his file'i also properly positioned.

What I claim is:

l. A- handle guide for files having a number p of depressions to provide a thumb rest whereby when the handle is gripped, the thumb of the operator will rest on the said ridge portion, and

the index finger will rest in one ofthe said second series of depressions.

2. A tool handle having a guide means for fixing the position of the hand of the operator for thereby fixing the precise relationship of the tool to the work, said handle having a socket at one end to receive and retain the tool, facets at the said tool receiving end corresponding in number to the sides of the tool, a tapered ridge adjacently above said facets, a series of elongated depressions adjacently above said tapered ridge, a sec- 0nd tapered ridge adjacently above said depressaid handle having two spaced sets of cavities equal in number circumferentially arranged and longitudinally extending, one set arranged above the other, and facets at the bottom end of the handle corresponding to the number of sides on alignment with.

the file. each facet arranged in a side of the file.

EMILE BELANGER.

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