US2667639A

US2667639A - Cam action magazine type tack hammer

Info

Publication number: US2667639A
Application number: US188555A
Authority: US
Inventors: Eugene G Schick
Original assignee: Tok Inc
Current assignee: Tok Inc
Priority date: 1950-10-05
Filing date: 1950-10-05
Publication date: 1954-02-02
Anticipated expiration: 1971-02-02

Description

Feb. 2, 1954 sc -uc 2,667,639

CAM ACTION MAGAZINE TYPE TACK HAMMER Filed Oct. 5, 1950 ar 154 1,, 'llllllllllli/ a Q EUGENE G. SCHICK IN VEN TOR BY w zh.

ATTORNEY Patented Feb. 2, 1954 CAM ACTION MAGAZINE TYPE TACK HAMMER Eugene G. Schick, Fort Tok, Inc., Amarillo,

Texas Worth, Tex., assignor to Tex., a corporation of Application October 5, 1950, Serial N 0. 188,555

3 Claims.

This invention relates to a magazine type tack hammer and has reference to improvements in feeding mechanisms therefor for moving the tacks into position to be driven.

An object oi the invention is to provide a mega zine type tack hammer having a relatively slow cam action for moving and positioning the tacks therein, and whereby the tack feeding. mechanism is not subjected to damaging impact or shock loads.

Another object of the invention is to provide a reciprocating tack moving ratchet in a hammer of the described class wherein a partial stroke of the ratchet will not move the tacks in to the discharge end of the magazine.

A further object of the invention is to provide a magazine construction for a tack hammer wherein the position of tacks in the magazine may be readily determined at any time.

The invention. will be more readily understood by reference to the accompanying drawings and the following description.

Figure 1 is a side elevation and broken sectional view showing a magazine type tack hammer embodying the features of the present invention.

Figure 2 is an enlarged broken vertical sectional view of the forward or end of the hammer illustrated in Figure 1.

Figure 3 is a sectional view" taken on lines 3-3 I of Figure 2.

Figure i. is a broken perspective View of a strip of joined tacks and showing the position of the ratchet relative thereto.

The strip oi tacks it shown have their heads 5 i joined to each other on opposite sides thereof, and have their shanks 52 parallel with each other and; pointing in the same direction. Indentions I3 are provided between the respective heads whereby the tack being driven may be sheared from the strip. Within the meaning of the present invention. the strip of tacks it do not have to be joined in the manner described, but may be secured in strips by other means. such by means of strips of paper, as illustrated. and de scribed in. U. S. Patent No. 1,162,578 issued November 3 19-15, to C. S. Baden.

The present magazin type tack hammer includes a handle Hi and a hand grip E5 on one end thereof. The end of the handle M opposite the hand grip i5 is provided with a head member it having a solid laterally projecting head ii iii-- tegral therewith. The portion of the head member l5 opposite the solid head ii is provided with an integral lateral projection it having an outwardly and forwardly directed cam surface 59 on the side thereof adjacent the handle it.

The magazine Zil is comprised of spaced parallel sides 2!, each having a laterally projecting car '22 for attachment to the handle M near thegrip I5 by means of a pin 23 passing therethrough. The sides of the magazine 26 are rigidly secured to each other by means of a frame 2% in the form of a bar which is rectangular in cross section. The sides 2| may be secured to the bar 2 3 by suitabl means, such as welding, brazing, riveting or the like. Beneath the frame 24 and spaced therefrom there is a rail 25 secured to inner face of each side 2-! and so arranged as to form a T slot 26 throughout the length of the magazine 20'. The ends of the frame 2 and the rails 25 are curved outwardly from each other at the pivoted end of the magazine 29, as at 2? and 28, to provide a convenient means for inserting the strip of tacks 10;

Referring now to the end of the magazine 29 opposite its pivot pin 23', there is an enlargement 29 in each magazine side 25 and outwardly formed to receive one end of an elongated body member 30, and is secured thereto by means of screws 3!. An opening s2 is formed through the length of the body 30 and slidab-ly receives a draw bar 33 having an upturned end 3 on the end thereof opposite the cam surface ill. The upturned end 34 projects above the body where-.

by the draw bar 33 may be manually operated during the loading operation, to be dcscri .d. A compression spring 35 is positioned 1st the outer surface of the turned up end 3 2, and the remaining end of the spring is secured by tabs 36 in the enlarged sides 29- of the m azine sides 2!. A dimpl 37 (Figure 3) formed in the upturned end 34 and is received within the adjacent end. of the compression spring 35.

The end of the draw bar 33 opposite the upturned end 34 projects through the body and is in sliding contact with the cam surface If). As will become apparent, the rise of the cam surface I9 is such that it will move the draw bar 33 a distance equal to the width of any one tack head between the indentions i The forward end of the frame as terminates near the outer end of the body 3i! so as to provide a cavity 38 which accommodates a ratchet 39 secured to the lower surface of the draw bar 33. The forward end to the ratchet 39 is substantially in the form of an inverted U in lateral cross section and has a rearwardly and upwardly directed. curved spring 4'! on its rearward end for attaching the ratchet 39 to the draw bar 33, as by means of a rivet 40. The teeth 42 of the ratchet 39 are formed on both the lower sides and are spaced from each other at distances equal to the widths of the tack heads II. The teeth 32 are fiat across their lower ends and are normally received outwardly of and between the adjacent tack heads ll. As particularly shown in Figure 4, the width of the ratchet 39 is less than the maximum widthof the stripof tacks l 0 and the teeth fit between adjacent tack heads H when moving the latter forwardly. A holding spring 43 is secured to the bottom of the body 30 by means of a rivet 43a and has its'remaining end positioned to contact the upper surfaces of the tack heads H as they pass therebeneath. Al though not shown, the projecting end of the spring 43 may be forked so as to straddle the tack heads II where they join each other so as to prevent the tacks !9 from moving rearwardly during the return movement A cylindrical driver 44 is slidably positioned through a transverse opening G5 in the forward end of the body 30 and through an elongated opening 5! in the draw bar 33. The driver has an enlarged head 45 having a spherical surface 4'! on the upper end thereof. A U-shaped spring 48 having outwardly directed flanges 50 in its upper end is slidably received within opposing slots 5! in the hammer head member 16, and which spring includes a relatively large opening, not shown, therethrough, and engages the driver head 41S and positions the spherical surface 5! thereof against the lower central surface 62 of said head member. Opposing holes 52 and 53 are drilled in the head member H5 and the body 39 and receive a compression spring 5 for normally urging said member and said body away from each other.

Head side members 55 are secured to the opposing sides of the body 36, as by welding, and extend upwardly adjacent the sides of the head member Hi. There is an arcuate slot 56 in each head side member and which slots are formed on an are about the center of the magazine pivot pin 23. A pin 5? is positioned through the head member 5% and projects through the slots 56. If desired, washers 93 may be secured on the pin 5! to prevent the head side members 55 from bending outwardly. It is thus apparent that the length of the slot 5'5 limits the movement of the body 30 relative to the head member l6, and together with the pin 5?, provide for movable attachment of one end of the magazine 20 with the head member 55. Beneath the end of the member 36 and positioned adjacent the driver opening 45 therein there is a block or nose member 58 having a cylindrical opening 59 therethrough, together with a slot 60 formed to admit the strip of tacks is therethrough, and which slot is a continuation of the first named slot 26. The nose member 58 is welded or otherwise rigidly secured to the body 2-8, as shown. The nose member is made separately from the body 39 for the purpose of conveniently forming the tack accommodating opening to, since the body 30 would otherwise be difficult to machine.

In operation, a strip of tacks i is inserted in the slot in the magazine as at the end thereof adjacent the magazine pivot pin 23. The heads H are manually forced past the teeth 92 of the ratchet 39 and into a position in the cylindrical opening 59 of the nose piece 58. The hammer is then held by the hand grip i and the nose piece 58 is struck against the surface in which the tack is to be driven. The driver 44 then strikes the tack head ii and drives the tack in place. At the same time the action of the cam surface 59 on the end of the draw bar 33 moves the latter rearwardly and causes the teeth 42 of the ratchet 39 to be engaged between the adjoining heads of the rearwardly positioned tack heads H. The holding spring 33 prevents the entire strip of tacks I9 from moving rearwardly at this time. The compression spring 54 beof the ratchet 39.

4 tween the head member 16 and the body 30 separates the same and at the same time the compression spring 35 in the magazine 20 moves the draw bar forwardly as the driver it permits such action. The forward movement of the draw bar 33 positions another tack within the opening 59 in the hose 58 and the hammer is again ready for driving said tack. If any tack is only partially driven, the action or stroke of the draw bar 33 is incomplete, and by reason of the described shape of the teeth 42 the remaining tacks are not gripped for moving the same forwardly. In the latter event, the position of the head member 15 may be reversed and a single blow of the solid head I! may be used for completing the driving of the partially driven tack without interfering with the tack moving action.

The present invention is not limited to the construction herein shown and described, but may be made in many ways within the scope of the appended claims.

What is claimed is:

1. In a magazine type tack hammer including a handle and a head member on one end of said handle, the combination of a tack magazine having a tack passage slot through the length thereof, said magazine having one end thereof pivotally secured to said handle and having the remaining end thereof movably secured to said head member, a driver projecting from said head member and slidably positioned through the end of said magazine opposite its said pivoted connection and transversely through said tack passage slot, a cam carried by said head member, a draw bar slidably mounted in said magazine and positioned to engage said cam, and a tack engaging ratchet secured to said draw bar and positioned to engage and move the tacks in said tack passage slot toward said driver.

2. In a magazine and feed mechanism for a tack hammer as defined in claim 1, the construction wherein said ratchet is in the form of an inverted U in transverse cross section, and having flat end teeth along the sides thereof.

3. In a magazine type tack hammer including a handle and a head member on one end of said handle, the combination of a tack magazine having a tack passage slot through the length thereof, said magazine having one end thereof pivotally secured to said handle and having the remaining end thereof movably secured to said head member, a driver pivotally secured at one end thereof to said head member, and having its remaining end slidably positioned through the end of said magazine opposite its said pivoted connection and transversely through said tack passage slot, a cam carried by said head member, a draw bar slidably mounted in said magazine and positioned to engage said cam, a tack engaging ratchet secured to said draw bar and positioned to engage and move the tacks in said tack passage slot toward said driver, spring means carried by said magazine urging said draw bar against said cam, and spring means urging said magazine away from said head member.

EUGENE G. SCHICK.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,162,678 Boden Nov. 30, 1915 1,166,190 Dawson Dec. 28, 1915 1,463,890 Hohn Aug. '7, 1923 2,524,061 Lindstrom Oct. 3, 1950