US1431533A - Chuck - Google Patents

Description

W. L. McLEAN.

CHUCK.

APPLICATION FILEDSEPT. 29, 1921.

1,431,533, Patented Oct. 10, 1922.

Win55; Z

1ilatenteil ct. l0, 1922.

UNITED STATES WARREN L. MGLEAN, OF SAN FRANCISCO, CALIFORNIA.

CHUCK.

Application nled September 29, 1921. Serial No. 504,011.

To al( whom t may concern:

Be it known that I, VARREN L. MoLEAN, a citizen of the Dominion of Canada, and resident of San Francisco, county of San Francisco, and State of California, have invented a new and useful Chuck, of which the following is al Specification.

The present invention relates to improvements in Vchucks and has reference more particularly to such chucks as are used in connection with screw drivers, drills and similar rotating tools. The invention hereinafter described. constitutes an improvement on thedevice disclosed in my co-pending application Serial No. 383,617, filed May 24.-, 1929, entitled Screw driver. j

The present improvement was designed with particular reference to the screw driver disclosed in said application, but the general principle involvedca'n be used as well in connection with drills or lsimilar tools in ,which `a rotating bit is to be gripped by the tool actuating the same.. The principal object of the present invention is to provide a. chuck that is provided with jaws adapted to adjust themselves or their bit engaging surfaces to the particular shape of the bit to be engaged. l y

A further object of my inventionv is to provide my chuck with simple auxiliary means for rotating the same in case the means ordinarily provided for this purpose do not allow of the application of suihcient strength to rotate the bit. The preferred form of my invention is illustrated in the accompanying drawing, in which Figure l represents a side view of my chuck, portions-of the same being broken away to dis close the interior; Figure 2 a horizontal cross section along line 2-2 of Figure 1; Figure 3 a vertical cross section along line wl of Figure 2; Figure 4t a horizontal cross section along line /i-*t of Figure 3; Figure i a vertical cross section corresponding to that shown in Figure 3 but representing the jaws in a somewhat different position; Figure 6 a wrenchto be used in connection with the chuck; Figure 7 a vertical cross section through the vtool substantially along line 2 2 of Figure l illustrating the use of the wrench referred to; Figure 8 a perspective view of the jaws used in my chuck, and Figure 9 a perspective view of a sleeve adapted to be used in combination with thek wrench illustrated in Figure 6.

Referring to the drawings in detail, it will be seen that only the chuck portion of the tool, which may be a screw-driver, or a drill or some similar device, is shown in the drawing. For the sake of convenience it may be assumed that the tool portion (l) shown in Figure l is the lower end of the screw-driver illustrated in my co-pending application, or of any other screw driver of a type commonly known as the Yankee screw driver. The chuck (2) comprises the two jaws (3), a jaw retaining portion (4f) anda sleeve (6).

The two jaws (3) are ythe principal part of my invention and their particular feature is the means for joining the same,

which consists in a spring (7) comprising a string of wire turned into a central loop and having its two ends turned side ways in opposite directions as shown in Figures 3 and 5, each end being adapted to be received in a corresponding perforation (l0) in the top end of each jaw.V The tendency of this spring is to normally `hold the two jaws in spaced relation to each other in the manner illustrated in Figure 5, which shows the top ends of the two jaws in rather close vrelation while the bottom ends are further away from each other so that normally the interior surfaces of the jaws do not run parallel to each other but slant away from each other downwardly. The particular spring connection between the two aws, however, allows the relative position of the same to be adjusted so that they may change their slanting position to a parallel position in the following manner:

Assuming that the bit (9) indicated in dotted lines in Figure 5 is carried upwardly between the jaws until it comes in contact with their interior surfaces, it will be seen that upon pressing the jaws together by means of the sleeve (6) the jaws will pivot on the points of contact between the jaws and the bit and will assume such a position that their interior surfaces lie substantially flat against the surface of the bit, thus es tablishing a iirm holding contact along the whole line of engagement ln this manner any shape of bit within reasonable limits can be introduced between the jaws and they CTX `torce the latter together.

v handle actuating the same.

tion (l2) of somewhat smaller dimensions, and an interior Oroove (la) increasing in dimensions toward the bottom. and provided at the bottom with a shoulder (16) adapted to engage a corresponding shoulder (17) provided in the commonly used 1 u oit (lb), and holding the same against longitudinal displacement.

` The jaw retaining portion is provided at the top with a recess (2l) or square cross section adapted `to receive the barl torni'- ing a part of the tool handle. Through the main portion of the jaw retainer extends a circular recess (23) beginning at the bottom and extending upwardly andadapted to receive the spring (7) previously referred to. To receive lthe upper portions ol the jaws a cent-ral part (26) of the retainer is cut away altogether, which allows the jaws tol spread under the influence ot the spring Where the cutfaway portion begins a curvedshoulder (27) is provided which allows the` jaws to spread their adja- Cent upper ends in the manner hereinbeiore described. Exteriorly the lower portion oit Athe jaw retainer is threaded and adapted "to grooves (31) and is yheld in that position bythe rspring which extends around the retainer and holds the hoolrin contactvwith the same.`

p Itwill be seen that in this manner the hook can be easily slipped on 4the retainer whenever it becomesnecessary to exert more force in rotating the drill than can ordinarily be obtained from the This particular wrench (32)l in combination with a groo-ved sleeve (37) can be used generally :tor vthe j turning of nuts in inaccessible places, if the sleeve is provided with a perforation (38) of square or hexagonal cross section adapted to lit on the nut it is desired to turn.

lVhile I have` thus illustrated andl described a particular preferred form of my invention, I wish to remark that a number of changes and modifications may be made, espepially as to the particular form of the jaws and the means for l clamping the jaws together, without .affecting the spirit yof my invention, the essential feature of which is the particular con necting means ot` the jaws allowing the latter to adjust their` relative position to each other and to a bit gripped by the same so as to present contacts over an extended area ofthe respective surfaces irrespective oi the particular shape of the bit employed.

l. claim:`

l. In adevice of the character described,-

the coinbinationoi'` a chuck having a rplua wrpnch tor rotating thesame comprising a hook adapted to engage any` one of the Vgrooves and yieldingr means for holding the hook in the groove allowing of lateral en-L gagement and disengagement. l

2. In a wrench the coinbfnation of a sleeve having a plurality of external longitudinal grooves with a hook adapted t'o engage any oneof the grooves and provided withy a spring adapted to hold it in the'sleeve and to allow ol lateral engagement and disengagement.

ln a y sleeve having a plurality of external longitudinal grooves with a hook comprising a handle ending in a curved portionadapted j to lie against a peripheral portion of the sleeve` and terminating j in la tooth adapted to engage one ot the grooves, a spring being secured. to said curved portion and extendv'i'ench, the combination `of a Arality of longitudinal'grooves therein and ing beyond the ltooth .aroundv the sleeve ,so

as to hold the hook in yielding contact with the sleeve. .y

vminanlir` L; MenEAN;

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