US21820A - Hammer - Google Patents

Description

UNITED STATES PATENT GFFICE.

JOSIAH P. CLARK, OF PORTLAND, MAINE.

HAMMER.

Specification of Letters Patent No. 21,820, dated October 19, 1858.

To all whom it may concern.'

Be it known that I, JosmH P. CLARK, of Portland, in the county of Cumberland and State of Maine, have invented a new and useful Improvement in Hammers for Driving Nails; and I do her'eby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specication, in which- Figure l represents a view of the under side of the metallic plate d, CZ, cl, with the opening a for inserting and holding the head of the nail; the slide Z) which by the action upon it of the spring e combined with the beveled edge of the slide holds the head of the nail lirmly until, with one blow, the point of the nail is inserted in the wood or other material, and at the same time by the recoil of the hammer the head of the nail is released and the nail left sticking in the place where it is to be driven, without requiring the use of the other hand oi the carpenter or joiner to tix or hold the nail in place. Fig. Q represents a longitudinal vertical section of the same; Fig. 3 represents the slide and Fig. 4 a longitudinal vertical section of the same. Fig. 5 represents a carpenters hammer, with my improvement attached to it.

Similar letters of reference indicate corresponding parts in all the figures.

My invention consists in the novel means employed for holding the nail to be driven, so that without being xed or held by the hand of the carpenter or other person in the place where it is to be driven, the nail is by one blow of the hammer, firmly fixed in the place where it is to be driven, by means of an apparatus attached to the side of the hammer constructed and arranged substantially as herein set forth.

To enable any one skilled in the art to understand and construct my invention, I will proceed to describe it.

To the side of a carpenters hammer I attach securely by screws, or other means, a metallic plate cZ, cl, d, having on its external :tace an opening a of sutlicient size to admit the introduction of the head of a nail. The slide Z2 is so arranged by means of a metallic spring e, or a spiral spring, or other equivalent mechanical device, as upon the introduction of the head of the nail, to recede sufficiently to admit of its introduction into the aperture a, and then by the action of the spring upon the slide, the head of the nail is firmly held between the face of the slide and the edge of the metallic plate on the opposite side of the opening. It will be seen by the sectional drawing (Fig. 4) of the slide, that the anterior edge of the slide forms an acute angle with its exterior face at f I also use the small pin c in connection with the groove in the slide to regulate the extent of the movement of the slide; but the same thing can be accomplished by any of the other equivalentdevices in coinmon use for such purposes. It will thus be seen that by means of my invention, the carpenter, when he desires to drive a nail in any position where he is obliged to reach above his head or where he needs the use of one of his hands to hold on with to keep himself from falling (as is frequently the case in nailing around and above the windows and other openings in a house, and in many other positions) can first insert the nail in the aperture a and then with one blow ot' the hammer with the use of but one hand, fix the nail in its place, and by the recoil of the hammer at the same time have the nail released from the hammer, and the hammer 4ready for use to drive the nail in the ordinary way.

Vhat I claim as my invention and desire to secure by Letters Patent is- The combination with an ordinary hamlner of the metallic plate fl, CZ, el, with an opening a and slide Z) constructed and operating substantially as herein set forth and described.

JOSIAI-I P. CLARK.

Witnesses:

G. F. SHEPLEY, L. D. SHEPLEY.

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