Padlock.

(Application filed June 11, 1900.) (No Model.)

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THE NORRIS PETERS CO., PHOTO-LITMO., WASHINGTON. D. C.

United States Patent Office.

FRANK SOLEY, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE MILLER LOCK COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

PADLOCK.

SPECIFICATION forming· part of Letters Patent No. 695,347, dated March 11, 1903.

Application filed June 11,1900. Serial No. 19,880. (No model.)

To all whom it may concern:

Beit known that I, Frank Soley, a citizen of the ITnited States, residing in Philadelphia, Pennsylvania,haveinventedcertainlmprove5 ments in Padlocks, of which the following is a specification.

My invention relates to padlocks which have a sliding shackle retained in the retracted position by engagement with a dog which is perio mitted to move out of engagement with the shackle when the tumblers controlling it have been properly adjusted by the key, the .shackle being then projected by the action of a spring.

One object of my invention is to so construct such a lock as to provide fora more extended movement than usual of the sliding shackle, thereby insuring a larger opening for the passage of the staple in the application of the 20 lock to or its removal from said staple, a further object being to improve the construction and action of the dog-eontrolling tumblers of the lock. These objects I attain in the manner hereinafter set forth, reference being had 25 to the accompanying drawings, in which—

Figure 1 is a view of my improved lock with the cap or cover plate removed and the shackle in the closed or retracted position. Fig. 2 is a similar view showing the shackle 30 projected or in the open position. Fig. 3 is a transverse section on the line a a, Fig. 1. Fig. 4 is a view, partly in section and partly in plan, on the line δ δ, Fig. 1. Fig. 5 is a perspective view of the lock-casing with the cap 35 or cover plate removed. Fig. 6 is a perspective view of the shackle. Fig. 7 is a perspective view of the retaining-dog and tumblers and their springs. Fig. 8 is a side view of one of the tumblers, and Fig. 9 is an enlarged sec40 tional view of part of the lock-casing.

The casing 1 of the lock is in the present instance of circular external form with flat side and has at one point in its periphery a segmental recess 2 for the reception of the staple, 45 the flat cover-plate 3 being similarly shaped and having a like recess 4. The upper portion of the sliding shackle 5 has a segmental recess, which when the shackle is retracted conforms to the recess 2 of the casing and com50 pletes the circle of which said recess is a seg ment, the nose 6 of the shackle being seated . in a recess 7 in the lock-casing. The retaining-dog for engagement with the shackle to hold it in the retracted position is shown at 8, this dog being pivoted within the casing 55 and havinga nose or stump for engaging with the notches of the tumblers 9, which are likewise pivoted within the casing and acted upon by springs 10, the tumblers being adjusted by means of a key 11, introduced through the 60 slot 12 in the easing.

So far as described the parts are all similar to those of padlocks of this character as heretofore made; but usually the lower end of the dog 8 engages with a notch formed in the ad- 65 jacent side of the sliding shackle and extending completely across the same, as it must in such ease because of the width of the dog, which is equal to that of the shackle. The objection to this method of construction is 70 that it limits the sliding movement of the shackle, since the latter cannot be of such an extent as to carry the notch outwardly into line with the segmental rib 13, bounding the inner portion of the recess 2 in the lock-cas- 75 ing; otherwise the shackle could be tilted out of its proper position, and the parts thus deranged, so as to interfere with the proper operation of the lock. I therefore provide the back of the dog 8 with a projecting lug 14, 80 as shown in Fig. 7, and I form in that side of the shackle 5 which is adjacent to the dog a recess or socket 15, as shown in Fig. 6, said recess when the shackle is retracted receiving the projection 14 on the dog and causing 85 the latter to retain the shackle in the retracted position. The recess 15 is less in width than the shackle itself, so that it is flanked on both sides by walls 16, which bear upon the edge of the rib 13 when the recess 15 is passing 90 the same in the movements of projection or retraction of the shackle, and thus prevent any tilting or other objectionable derangement of the shackle during either of these movements. The back of the shackle bears 95 against the edge of the outer segmental rim of the easing during said movements of projection and retraction, and further guidance of said shackle is provided for by a rib 18, projecting inwardly from the side of the cas- 100

695,347 ing 1 and engaging with a groove 19 formed in the adjacent side of the shackle, as shown in Fig. 6. The shackle is laterally confined between the cap 3 and the segmental rib 20 5 on the edge of the recess 2 and straight ribs 21 on the inside of the casing, one of said ribs 21 having a rib 22 projecting therefrom at a right angle and having a segmental termination 23, said ribs 22 and 23 serving as lateral io guides for the dog and tumblers. By reason of this construction the shackle is during movement rigidly guided and retained in proper position in respect to the lock-case and extended movement of the shackle is permit15 ted, so that when the shackle is projected the space between the projecting nose 6 of the same and the periphery of the casing 1 is such as to permit of the passage of a staple of almost as large diameter as the diameter of the 20 opening formed by the shackle and casing for the reception of said staple. Hence ample strength of staple is provided for and the lock fits snugly to said staple.

The spring 24, which projects the shackle, 25 is a multiple-coil spring—that is to say, it comprises a large coil 25 and a series of smaller coils 26, disposed side by side. By this means considerable length of spring is obtained and the same has more uniform 30 elasticity and is less likely to break in action than a single-coil spring. Moreover, the series of coils is of such lateral dimensions as to substantially fill the space between the lock-casing and cap, thus preventing lateral 35 displacement of the spring on its supportingpin.

One of the tumblers has a bevel instead of a notch for the reception of the nose of the shackle-retaining dog, such tumbler being 40 represented at 9^a in Fig. 8, and the spring 10% which acts upon this tumbler, is heavier than the springs 10, which act upon the remaining tumblers 9. The depression of the tumbler 9^a causes its beveled face to act upon the 45 nose of the dog 8 in order to force the projection 14 of said dog into the recess 15 of the shackle when the latter has been retracted, and by stiffening or strengthening the spring 10^a, which acts upon said tumbler 9^a, suffi50 cient power is obtained for thus moving the dog; but as the remaining tumblers are acted upon by light springs the resistance offered by the tumblers to adjustment by the key is not excessive. The spring 10^a also acts upon 55 the dog 8 to retract the same, so as to withdraw its projection 14 from engagement with the recess 15 of the shackle when the tumblers have been properly adjusted, and the nose of the dog is therefore free from the in60 fluence of the beveled face of the tumbler 9^a; but the latter projects the dog when said tumbler is permitted to descend, owing to the fact that it acts upon said dog at a point farther from the fulcrum of the same than that 65 at which the spring 10^a acts directly upon it.

The projection of the shackle is arrested by contact of a projecting toe 27 thereon with a transverse stop-pin 28 in the casing, this stoppin having a shoulder bearing against the cap-plate 3 and a portion beyond said shoul- 70 der reduced in diameter and swaged into a countersunk openingformed in the cap-plate, as shown in Fig. 9, the opposite end of the pin being likewise swaged into a countersunk opening formed in the casing 1 of the 75 lock. By this means the pin can before being compressed endwise, so as to upset or swage its ends, be introduced into the casing after the cap-plate has been secured in place and the shackle has been inserted, the 80 upsetting of the ends of the pin serving to secure it in place in the lock and preventing it from being driven laterally from its proper position.