US587564A

US587564A - voight

Info

Publication number: US587564A
Authority: US
Publication date: 1897-08-03
Anticipated expiration: 1914-08-03

Description

(No Model.) 2 sheets-sheet 1.

H. G. VOIGHT.

MASTER KBY'PIN LUCK.

No. 587,564. Patented Aug. 3,1897.

ggigpfm M# www (No Model.) 2 Sheets-Sheet 2.

H. G. VOIGHT. MASTER KEY PIN LOCK.

No. 587,564. v D Patented Aug. 3,1897` Hbf/755555 LVEUUF UNITED STATES PATENT OFFICE.

HENRY Gr. YOIGIIT, OF NEW BRITATN, CONNECTICUT, ASSIGNOR TO THE RUSSELL d: ERVIN MANUFACTURING COMPANY, OF SAME PLACE.

MASTER-KEY PIN-LOCK.

SPECIFICATION forming part of Letters Patent No. 587,564, dated August 3, 1897'.

Application tiled March 25, 1897. Serial No. 629,175. (No model.)

To all '1f/'hom it may concern:

Be it known that I, HENRY G. VorGHT, a citizen of the United States, residing at New Britain, in the county of Hartford and State of Connecticut,have invented certain new and useful Improvements in Master-Key Cylinder-Locks, of which the following is a specification.

My invention relates to improvements in master-key cylinderlocks; and the main object of my improvement is to arrange the pintumblers for bringing their divisions all upon one line when a special key is used and on different lines when the master-key is used. In the accompanying drawings, Figure l is a front elevation of my lock. Fig. 2 is a rear elevation of the same. Fig. 3 isa longitudinal section thereof, partly in elevation, on the line .fr of Fig. l, together with a special key properly inserted therein ready to turn the plug. Fig. 4 is a like view without any key. Fig. 5 is a like view with the master-key inserted in the lock ready to turn the plug. Fig. 6 is a horizontal section, partly in elevation, on the line gj y of Fig. 2. Fig. 7 is a front elevation of the case with the plug removed. Fig. 8 is a sectional view of the case on the line z z of Fig. 7, showing the upper portion of said case; and Fig. D is a detached view of one of the holding-wings for the plug.

A designates the case, having the case-tumblers 1 2 3 4 5 6 and springs 1l substantially as in other locks of thisclass, and B is the plug or cylinder fitted within the bore of said case. A longitudinal groove l2 is formed in said case in line with the inner ends of its tumbler-recesses 13, Fig. 8, and tumblers, the said groove being the full wid th of the diameter of said tumblers. The plug B is divided transversely into two parts, the front tumblerbearing portion having the plug or cylinder tumblers a b c d e f set therein, while the rear part carries the usual wing or dog l5 for acting on the lock-bolt. (Not shown.) Said rear part of the cylinder is provided with an annular groove, and the case is provided with holding win gs or plates 14, extended into said groove and secured to the case in any proper manner-for example, by screws lf3- whereby the plug or cylinder may be rotated in the Case under certain conditions, but its rear part cannot be moved longitudinally in the case to any appreciable degree. The rear and front parts of the plug or cylinder are held together so as to necessitate their simultaneous rotation and at the same time permit an independent longitudinal movement of the front part. This is accomplished by means of the screws 17, which pass loosely through holes in the said rear part and are snugly screwed into holes in the front part, so that the said screw may move longitudinally with said front part, while the rear part does not so move. The `cylinder or plug is also provided with the usual keyway 18, either with or without guards 19 and20.` The cylinder or plug is also provided 'with'three' circumferential grooves 2l, 22, and 23, each groove being of awidth to let the pin-tumblers pass through it, or, rather, let the grooves pass by the tumblers, as one end thereof rests within said groove. The tumbler-sockets are so arranged that when the forward end of the plug is at the extreme end of its outward movement the sockets and tumblers in the case and plug correctly register with each other, and the division-line of all the tumblers when the plug is in this position must be on the line of its. main periphery.

TheV grooves 2l 22 23 are each formed a little forward'of their respective tumbler-sockets, so that there is a partial tumbler-socket on one side of each groove, and when the forward'end of the'plug is at the limit of its inward movement the grooves will register with their nearest case-tumbler, and the divisionlineof such tuinblers must now be at the bottom of said grooves. In the confronting faces of the front and rear parts of the plug or cyl' inder is a special tumbler-socket 24:, having shoulders 25 above its lower end, the socket lbelow said shoulders beingof such diameter stantially fill it, so that the outer or front end of the plug cannot be moved inwardly until said tumbler is lifted up out of the way and lifted high enough so that its lower end may be above the shoulders 25, as shown in Fig.

IOO

o. If desired, instead of a pin-tumbler the not move the special tumbler.

ing faces of the front and rear parts of the plug, so that the said front part cannot move longitudinally. The change-key maynow be inserted, and it is made so short that it does The tu mblers are operated by this key so that the division between all of the case and cylinder tu mblers is on the periphery of the plug, as shown in Fig. 3. the same suit or set the changes are made in the tumblers la, 3c, and 5e, leaving the tumblers 2b, 4d, and 6 f the same in all of the locks.

The master-key is longerv than the changekey,V so that when inserted it lifts the special tumbler 26 up above the shoulders 25 to permit the front part of the cylinder or plug to be forced inwardly into the position shown in Fig. 5. The fact that the tumblers of the plug and case are slightly out of longitudinal alinement does not materially change their action. It is obvious that the 4several tumblers must move up and down as the keys are being inserted with a tendency to force the cylinder or plug inwardly, and if the plugtumblers should enter the round portion of the tumbler-sockets in the case they would be liable to bind therein and prevent the inward movement of the plug. The groove l2 is for the purpose of preventing such binding. This groove is deep enough so that the ends of the cylinder or plug tumblers are never forced into the tumbler-sockets in the case lying above said groove, and at the same time it is narrow enough to hold the cylinder or plug against rotation when the casetumblers enter it, the width of said groove corresponding with the diameter of said tumblers.

The master-key brings the ends of the tumblers 2b, 4d, and (if to the periphery of the plug the same as the change-key, while the ends of the tumblers la, 3c, and 5e are even with the bottoms of the grooves 2l 22 23. It is necessary to notch the back of the masterl key, as at 29 30 3l, to register with the said grooves and permit the back of the key to pass the projecting ends of the case-tumblers l, 3, and 5. Upon withdrawing `the masterkey the forward part of the plug is pulled out again andthe special tumbler 26 drops down between the two parts of the plug to lock For other change-locks belonging to it against longitudinal movement when the change-key is used.

I claim as my invention- 1. A cylinder-lock having its plug or cylinl der divided transversely but connected for rotating together, the part bearing the plugtumblers being adapted to move longitudinally for operating in one of its positions With the change-keys and in its other position with the master-key substantially as described.

2. A cylinder-lock having a plug provided with circumferential grooves a little to one side of part of its tumbler-sockets, the case, the plug and case tumblers, and means for moving said plug longitudinally to bring the ends of the plug-tumblers int'o position for operating either on the line of the main periphery'of the plug or at the bottom of said grooves as desired.

3. A cylinder-lock having its plug divided transversely with one part arranged to move f longitudinally, the special tumbler arranged to wedge between said two parts and holdthe f plug against longitudinal movement, and also to be removed therefrom by a key when'it is 85 desired to move the plug longitudinally sub stantially as described.

4. The combination of the case, plug, case A and plug tu'mblers, the said plug being divided transversely with its `two parts connected to rotate together while the tumblerbearing portion may move longitudinally, and means substantially asdescribed for locking the longitudinally-moving part of said plug against longitudinal movement when the change-key is used and for unlocking to permit a ,longitudinal movement thereof when the master-key is inserted substantially as described.

5. The combination of the case having alonroc gitudinal groove in the line of the inner ends y of its tu mbler-sockets the width of said groove substantially corresponding to the diameter of the tumblers, the longitudinally moving and rotating plug, and tumblers for said case :o5

and plug vsubstantially. as described.

I 6. The combination of the case having tu'mblers, the two-part plug within said case the front part thereof having tumblers and the 4rear part of said plug having an annular no part to move longitudinally at times, substan- `1 x 5 tially as described.

HENRY G. VO'IGHT.

lVitnesses:

T. S. BISHOP, M. S. WIARD.