US2552587A - Magazine hammer - Google Patents

Description

y 195.1 I G. F. RENDALL 5 25 MAGAZINE HAMMER Filed Jan. e,"1947 s she'et s-sheet l.

62' p v @0 Z i Z Q q {@3 r I vii I v 6 Al II May 15, 1951 e. F. RENDALL 2,552,587

MAGAZINE HAMMER Filed Jan. 6, 1947 3 Sheets-Sheet 2 INVENTOR. M

E fll I Patented May 15, 1.951

UNITED STATES PATENT OFFICE MAGAZINE HAMMER George F. Kendall, Chicago, Ill.

Application January 6, 1947, Serial No. 720,450

This invention relates to an improved magazine hammer, and in particular, one that may be used. in driving nails in locations which do not permit facile use of an ordinary hammer.

In this connection it is contemplated that the magazine hammer may be held by the operator and operated in any desired angular position. That is, it may drive nails downwardly or upwardly, or in a horizontal direction.

It is an object of my invention to provide an improved magazine hammer which is characterized by comparatively inexpensive construction and simplicity of operation.

Another object is to provide in a magazine hammer, an improved magazine in which the nails are disposed radially, each nail. touching each adjacent nail at two places, so that there will be no free movement of the individual nails. Thus, the nails, and in particular, the nail which is in feeding position, are always properly aligned, with the feeding device irrespective of the angle at which the hammer is held by the operator.

A further object is to provide an improved means for transferring one nail at a time from the magazine to the barrel of the hammer.

Still another object is to provide an improved ram arrangement for a magazine hammer by means of which the ram is maintained in alignment with the barrel, thereby insuring easy operation, and also to provide means for locking the ram in place when the hammer is not in use.

Other objects, features and advantages will become apparent as the description proceeds.

With reference now to the drawings, which form a part of this specification, and in which like reference numerals designate like parts, Fig. 1 is an elevation of a preferred embodiment of my invention;

Fig. 2 is a side view of Fig. l with the rain handle shown in a changed position;

Fig. 3 is a section along line 3-3 of Fig. 1, but showing the parts in still a different position;

Fig. 4 is a section along line 4--4 of Fig. 3;

Fig. 5 is an enlarged detail view of a portion of the parts shown in Fig. 4;

Figs. 6 and '7 are detail perspective views showing the operation of the nail feeding device in greater detail;

Fig. 8 is a horizontal section taken along 88 of Fig. 3;

line

Fig. 9 is a horizontal section taken along line 5 Claims. 01. 146) Fig. 11 is a perspective view of the ram locking device; and

Fig. 12 is a vertical section through the ram locking device.

The hammer comprises a barrel I5, a magazine I6, a block H, which is mounted on the barrel, and to which the magazine I5 is secured, and a handle [8 which is suitably secured to the block. At the upper portion of the hammer is a ram handle IS, the arrangement being such that the operator maintains the hammer in position, with the lower end of the barrel against the point in which the nail is to be driven, by grasping the handle It in one hand. The other hand is then free to operate the ram handle IS.

The magazine l6 comprises a circular sector shaped plate 2!] which extends through 240 degrees, more or less, and as shown in Fig. 4, is provided with an are shaped groove 2i which is adapted to accommodate the heads of a series of nails 28. The plate is secured to the block .1 by screws 22 and 23, as shown in Fig. 4, and at its lower end the plate is secured with respect to the barrel l5 by means of a suitable bracket 36.

A second plate 24 overlies plate 20, and is spaced therefrom by a spacer 26, thereby providing a magazine in'which the nails 28 may be disposed. The plate 24 also has a groove 25 which is opposite to the groove 2|, thereby forming a double groove for the nail heads. The plates 20 and 24 and the spacer 25 are secured to each other by a series of screws 25. in addition to the.

engages the nails 28 in the magazine, and urges them against the feeding device.

The follower 3| comprises a hub portion 32, which surrounds the bolt 29 and sleeve 53, and two arms' 33 and 34. Arm 33 extends between the plates 29 and 24 to engage the nails, as shown in Fig. 4, whereas arm 34 is disposed without the magazine, adjacent plate 24, and provides.

means by which the operator can retract the follower 3! from operative position, as shown in full lines in Fig. 4, into its loading position as indicated by the dotted lines in Fig. 4.

A spring 35 serves to urge the follower in a clockwise direction,- as shown in Figqi, wherein.

it bears against the nails 28. The spring 35 is disposed in the space between the sleeve 53 and the hub portion 32, one end of the spring being secured to the flanged nut 30, and the other to the hub 32. Thus, the nails 28 are urged through the magazine in a clockwise direction. The block I1 is formed in two parts, the part 38 being the part to which the plate 20 is secured, as shown in Fig. 6, and the other part, 39, being secured to part 38 by'means of screws 40. The two parts are suitably grooved to accommodate a portion of the barrel I which is of somewhat smaller diameter than the remaining portion of the barrel, thereby insuring that the position'of the" block ll will be fixed with respect to the barrel.

The nail feeding device comprises-a slide 42 which slides in a recessed portion'M of the'lolock part 39, as shown in Figs. 8 to 10. The slide 42 is provided with a bent over thumb piece 4-3, and

is biased into normal position by a spring 44 which surrounds a pin 45, the .pin being mounted in the thumb piece and extending into a suitable bore-in the block-part 39. Thus, the slide is urged into its normal position, as shown in Fig. 2, said normal position being determined by an 'enlarged portion 46 which engages the block part 39,as'shown in Fig. 8.

'A vertically disposed notch 41 is provided in the slide 42, the position of the notch being such that when the slide is in its normal position the notch will be in registry with the space between plates 20 and 24. As shown in Figs. 6 and '7, the barrel I5 is cut away, as indicated by the reference numeral 43, and the purpose of the slide is' to transfer a nail from the magazine to a point opposite the cutaway portion of the barrel. It will be observed that the slide 42 is provided with a groove 49, as shown in Figs. 8 and 10, which accommodates the head of the next succeeding nail in the magazine during such time as the slide is being operated to transfer the nail which is in feeding position. Similarly, a groove 50 is formed in the block part 38, as shown in Fig. 6, to accommodate the head of the nail which is being fed to the barrel.

The slide 62 is provided with a horizontally disposed slot 5|, and the leaf spring 52, having one end anchored in the block part 38, is disposed within the slot, as shown in Fig. 9. The opposite end of the leaf spring bears against the recessed portion of block 39, whereas the intermediate portion is bowed" toward the cutaway portion d8 of the barrel I5. The leaf spring engages the nail and forces it laterally into the barrel l5, and out of the notch 41. Thus, displacement of the slide by the operator serves to transfer, one at a time, the nails from the magazine into the barrel.

The ram handle 19 comprises a short length of tubing 5%, as shown in Fig. 3, the upper end of which is closed by a cap 6|. The ram 62 is threaded at its upper end into the cap 6|, and extends into the barrel I 5. The lower end of the tubing 60 is closed by a guide '63 which slides on the barrel I5. The upper portion of the barrel is enlarged, as at 64, to limit the upward motion of the ram and ram handle. Thus, by sliding the ram handle l9 up and down, the ram is caused to slide in the barrel, and will engage the'head of. a nail which has been fed into the barrel, to drive the same into the piece of'wood against which the lower end of the barrel is positioned. The parts'of, the ram handle preferably are of considerable "mass, inorder to provide the necessary'momentum for driving the nail.-

4 Due to the comparatively small diameter of the bore of the barrel, and the consequent small diameter and flexibility of the ram 62, it is desirable to provide the lower guide 63 which keeps the parts in alignment and tends to prevent any binding due to the flexibility of the ram.

Means are provided to lock the ram and ram 7 handle in its normal Fig. 1 position, in order to facilitate handling of the magazine hammer when the device is not actually in operation, and also to facilitate the positioning of the hammer when held in inverted position. This means comprises agroove formed in the guide 63, together with a locking device for engaging the groove, as shown in Figs. 11 and 12. The locking device comprisesa pin 65 which is slidably and rotatably .mounted in a bore in the block part 38. The pin 66 has an eccentrically disposed projection 6-? which is formed with an overhang or a catch 68 which is adapted to be rotated in or out of engagement with the groove 65. A bolt-BB-is threaded into the under side of the pin 66, anda spring H is confined between the head of the Thus, the" bolt, and a shoulder 78 in the bore. pin is urged downwardly into the bore. A screw 12, threaded into the side of the pin '66, and-extending through a suitable L-shaped slot in the block 38, provides a means by which the. pin 66 may be raised froman inoperative flush position,

I 63 as the pin is being elevated. Then the screw T2 is rotated sideways, as permitted by the 'L- shaped slot, which causes the catch 68 to engage the groove 55. when the hammer is held in position and ready to operate, the operator need only flick the screw l2 with the index finger of the hand which is grasping the ram handle E9. Thus, the spring 1|" retracts the pin and the catch within the bore in the block part 38, where it will not be dam-' aged by subsequent operation of the ram handle.

It will be observed in Fig. 4 that the dimensions of the magazine with respect to the nails are preferably such that the nails contact each other at any two places, namely, at their heads and near their points. Thus, there is no sideways movement of the nails, as might be expected in a radial type magazine. Furthermore,

the nails will all assume a radial position, and the nail which is in feeding position will be forced by the follower into the notch Al of the slide.

1 Thus, there is no opportunity for the nail to be disposed in a slanting position, partly in the notch and partly in the magazine.

In loading the magazine, the follower 31' is' brought up into dotted line position, in Fig. 4.

A suitable feeding device may be as shown For intube, and the latter agitated until the'shanks of the nails drop through the slot, the heads being retained within the tube. are aligned and the tube may be brought up to the feeding end of the magazine 55, and dropped The arrangement is such thatemployed Thus the nails released, all as above described. The follower will then assume the position shown in Fig. 4 in which it urges the whole series of nails 28 in a clockwise direction, the first nail being urged into the notch 41 of the slide 42. Let it also be assumed that the ram handle 5 9 is locked in position, then the operator with his right hand on the ram handle and his left hand on the handle positions the open end of the barrel against the surface into which a nail is to be driven. Without releasing the grip of his left hand on the handle [8, the operator places his thumb over the thumb piece 42 and displaces the slide, thus feeding the nail into a position opposite the cutaway portion 48. Since the ram 62 is disposed in the barrel at this cutaway portion, the leaf spring 52 is somewhat flattened. The operator then flicks the screw '12, unlocking the ram handle, and withdraws the ram handle while the thumb piece til is still depressed. As soon as the ram 62 clears the cutaway portion 48 of the barrel, the leaf spring 52 forces the nail into the barrel. At this point the pressure on the thumb piece 43 may be released, causing it to return to its normal position. In the mean-. time, the ram handle is being withdrawn to the limit of its motion, and pushed toward the handle 18. In the course of its driving motion, it will pick up the nail and urge it toward the open end of the barrel and drive it into the wood.

Repeated operations may then be effected at adjoining spots on the wood and it is obvious that it is not necessary to lock the ram until previous to each driving operation. If desired, the ram handle may first be withdrawn, and then the thumb piece quickly depressed and released, which will serve to feed a nail into the barrel preparatory to the driving operation.

I claim:

1. A magazine hammer comprising a barrel having a cutaway portion to permit the lateral insertion of a nail thereinto, a ram slidably mounted in said barrel, a magazine spaced from said barrel, slidably mounted means for removing one nail at a time from said magazine and bringing said nail into a position laterally opposite said cutaway portion, a spring biased follower in said magazine for engaging the last one of a series of nails disposed in said magazine in order that the flrst one of said series will be urged into engagement with said slidably mounted means, and stationary means extending into the path of said nail as it is being displaced by said slidably mounted means for laterally displacing said nail out of engagement with said slidably mounted means and into said cutaway portion of said barrel as said nail is brought into said position opposite said cutaway portion.

2. A magazine hammer comprising a barrel having a cutaway portion to permit the lateral insertion of a nail thereinto, a ram slidably mounted in said barrel, a magazine spaced from said barrel, means in said magazine for urging a nail into a feeding position in which it is disposed parallel to the axis of said barrel, a slide having a notch therein for removing said nail from said magazine and displacing said nail into a position laterally opposite said cutaway portion, and stationary means extending into the path of said nail as it is being displaced by said slide into the last named position for laterally displacing said nail out of said notch and into said cutaway portion of said barrel.

3. In a magazine hammer having a barrel, a

block mounted on said barrel, and a magazine secured to said block and spaced from said barrel, a slide slidably mounted in said block and capable of assuming a normal position and a dis placed position, said slide being provided with means for receiving a nail from said magazine when in normal position, and for transporting said nail into a position laterally adjacent said barrel, said barrel having a cutaway" portion adjacent said slide to permit lateral insertion of said nail into said barrel, and means mounted on said block and adapted to engage a nail as said slide is being moved into displaced position in order to displace laterally said hail from said slide into said barrel.

4. In a magazine hammer having a barrel, a block mounted on said barrel, and a magazine secured to said block and spaced from said barrel, a slide slidably mounted in said block and capable of assuming a normal position and a displaced position, said slide being provided with means for receiving a nail from said magazine when in normal position, and for transporting said nail into a position laterally adjacent said barrel, said barrel having a cutaway portion to permit lateral insertion of said nail into said barrel, and resilient means extending into the path of said nail as said slide is being moved into displaced position in order to displace laterally said nail from said slide into said barrel.

5. A magazine hammer comprising a barrel, a ram slidably mounted in said barrel, and a ram handle for actuating said ram, said ram handle comprising a tubular member telescopically mounted with respect to said barrel, and having a flanged guide for engaging said barrel, said ram being concentrically mounted within said ram handle and secured thereto whereby reciprocation of said ram handle will cause reciprocation of said ram within said barrel, a block mounted on said barrel, and locking means slidably and rotatably mounted in said block, said locking means being provided with an eccentrically disposed projection, and means for rotating said projection into looking engagement with said flanged guide to maintain said ram and ram handle in a fixed position with respect to said barrel, said block being provided with a bore in which said locking means is slidably mounted, and a spring for urging said blocking means into said bore so that it will be Wholly received within said block when in inoperative position.

GEORGE F. RENDALL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 446,631 Crisp Feb. 17, 1891 608,555 Nazel Aug. 2, 1898 622,638 Sandbo Apr. 4, 1899 662,898 Grandy Nov. 27, 1990 1,106,861 Beadle Aug. 11, 1914 1,146,105 Sabelman July 13, 1915 1,219,446 Erickson Mar. 20, 1917 1,514,403 Stepanek Nov. 4, 1924 1,879,895 Fenton Sept. 27, 1932 2,058,034 Prochiette Oct. 20, 1936 2,237,458 Thayer Apr". 8, 1941 2,379,826 Peterson July 3, 1945 2,418,118 Hamilton Apr. 1, 1947

Images