US509194A

US509194A - Robert p

Info

Publication number: US509194A
Authority: US
Publication date: 1893-11-21
Anticipated expiration: 1910-11-21

Description

(No Model.)

- R. P. GARTY.

KNOB AND SPINDLE LOCK.

No. 509,194. Patented Nov. 21,-

UNITED STATEs PATENT OFFICE.

ROBERT F. OARTY, OF DETROIT, MICHIGAN, ASSIGNOR OF ONE-HALF TO JOHN QGOODRIOH, OF SAME PLACE.

KNOB AND SPINDLE LOCK.

SPECIFICATION formingpartof Letters Patent No. 509,194, dated November 2 1, 1893.

7 Application filed March 21,1893. Serial No- 467,027- (No model.)

To all whom it may concern.-

Be it known that 1, ROBERT F. CARTY, acitizen of Canada, residing at Detroit, county of Wayne, State of Michigan, have invented a certain new and useful Improvement in Knob and Spindle Locks; and I declare the following to be a full, 'clear, and exact description of the invention, such as will enable others skilled in .the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to door locks, and has for its object an improvement, in that class of door locks in which the latch is turned into and out of engagement with a catch by the spindle and knob.

In carrying out this improvement, I employ a hollow knob, within which is concealed a lock, and the hollow knob is sleeved upon a bushing that is secured to the end of the ordinary square spindle by which the latch is drawn. The locking-mechanism is secured to the bushing, and operates to throw a bolt into such a position that the hollow knob is either locked to the bushing and the spindle or unlocked from it. In the former case, when the knob is turned the latch is drawn. In the latter case the knob revolves freely on the bushing.

When the lock is used in connection with outside doors I add to the bolt a catch which engages with a notch in the rosette whenever the knob is released from engagement with the bushing, and thus not only permits the knob to revolve freely, but also holds the latch rigidly to parts that are made fast to the door itself.

In the drawings, Figure 1, is a front elevation of the knob; Fig. 2, a front elevation of the lock. Fig. 3, is a section of the look as applied to inner doors; Fig. 4, shows in section those parts of the lock which are modified in the look as shown in Fig. 3, when the knob is used for outside doors; Fig. 5, shows the rosette used with outside doors; Fig. 6, shows in perspective the several parts of the locking mechanism separated from each other. Fig. 7 is a section on line a: m of Fig. 5.

D, indicates the square spindle commonly used with what are termed mortise latches or rim latches.

0, indicates a bushing fitting upon the spindle D, cylindrical on its outside terminating at its front end within the interior of the knob with a collar 0, and provided with a slot d, in which is hung a bolt or pawl e.

B,indicates the inner half of the outer shell or covering oomprising-theknob proper. This is provided with a cylindrical neck I), which is sleeved upon the bushing O. The interior of the neck I), is provided with a number of notches or serrations adapted to engage with the end e of the pawl e. The pawl e, is in the form of a bent lever, and normally the end e is lifted out of engagement with the notches b, by a spring .9. At one side of the collar 0, is a pin a, and upon the pin, a, is hung a tumbler t.

The bushing C, is provided with a central opening 0, to receive the stem is, of a key guide, g; the end of the key guide 9, is flush with the outer surface of the shell A, is concentric with the shell A, and turns in a perforation, that extends through the shell A; it is held from escaping from the shell, by the collar 9'.

H, indicates a wheel, provided with four notches n, and also provided with an eccentric shaped part h. The eccentric h, engages with the end e of the pawl c. The tumbler i, is curved and provided at each of its ends with an inwardly projecting hook or catch, 1, I. It also has an inwardly extending wing t. The distance between the inner ends of the hooks, Z, Z, is equal to the diameter of the wheel H. The wheel H, on its outer side opposite the side on which the eccentric h, lies is provided with a semicircular lug, j. The

tumbler t, is provided with a lug 19, with which one end of the spring a engages.

In assembling the parts of the lock, the in- I nor half B, of the shell is placed upon the bushing O, in which the pawl e, and the spring 8, had been previously placed, and the bushing is then secured to the spindle by a screw or rivet. The key guide or hub, g, is

passed through the hole in the wheel H, and into the hole G, in the end of the bushing O. The tumbler t, is hung on the pin a, with the end of the spring a, underneath the lug t the outer half of the shell is then put in place and secured to the inner half, by burnishing the edge of one down over the other. The spring a, tends to throw the hook Z, away from engagement with the wheel H, and tends to draw the hook Z, into engagement with the wheel H, and into one of the notches, n. A key of proper shape to operate the lock is passed into the hole through the key guide and pushed in until the end of it or a notch on it strikes against the front face of the wheel 1-1, in aposition to engage with the lug j, and turn the wheel H, as it is itself turned;

the revolution of the wheel H, and the eccentric, h, which forms a part of this wheel actuates the pawl or bolt 2, locking and unlocking the same; unless the proper key is inserted the tumbler '15, will be swung improperly and will either not be swung over far enough to cause the hook Z to move out of engagement with the notch n, in which it has been resting, or it will cause the tumbler t, to swing so far over that the hook Z, will catch in a notch on the opposite side and thus prevent the rotation of the wheel H. If desired the tumblers 25, may be multiplied to any desired number.

The lock thus described is for inside doors, such as bed room doors, where the locking part of the knob would be placed to the inside of the room, leaving it impossible to lock the door from the outside without the key.

.When this look is used with outside doors I add to the part already described the features shown in Figs. 4 and 5. To the pawl is added a hook or catch at, that is adapted to engage with a notch 7", cut in the ring that surrounds the opening through the rosette. To the knob on the inside of the door I add apush-button P, with the end e, of the pawl e, by a push rod q. Upon pushing the push button R, inward the pawl is turned and the catch n, lifted out of engagement with the notch r, and the spindle and knob is free to turn. The rosette itself is provided with points or lugs m, m, that take into the wood work of the door and aid the screws commonly used in securing the rosette to the door, sufficiently to prevent any one from forcibly twisting the rosette out of place.

What I claim is-- 1. In a knob latch, in combination with a spindle and a hollow knob, a bushing secured to the spindle and rotatably engaging in the hollow neck of the knob, a locking pawl, adapted to interlock the bushing and the hollow neck of the knob, means actuated by an inserted key for moving said locking pawl, substantially as and for the purpose specified.

2. In combination with a knob and the spindle thereof, a bushing secured to said spindle, a hollow neck extending from said knob, a locking pawl secured in the walls of the bushing, and adapted'to interlock with the knob a notched wheel having a central perforation, and an eccentric hub, 'a tumbler adapted to engage said notched wheel, the wheel being adapted to be rotated by an inserted key, and to itself actuate the locking pawl by means of the eccentrichub, substantially as and for the purpose specified.

3. In a knob latch, the combination of a spindle, a bushing thereon, a hollow knob rotatably secured on said bushing,a locking pawl, adapted to interlock the knob, and bushing a push rod, extending along the spindle and terminating at the center of the opposite knob, and adapted to actuate said locking pawl, substantially as and for the purpose specified.

4:. In a lock for securing a knob to a spindle the combination of the centrally perforated notched wheel, provided with the eccentric hub h, the tumbler t, the holding pin a, secured mediately to the spindle, the locking pawl e, e and the key guide g, substantially as and for the purpose described.

5. In combination with a spindle, the bushing secured thereto, a hollow knob adapted to turn on said bushing, and provided with looking notches b, a pawl hung to said bushing and adapted to form an interlocking means between the bushing and the knob, an eccentric wheel hung to said bushing and engaging with the said pawl to force it into locking engagement, and a spring adapted to lift the pawl out of interlocking engagement, substantially as and for the purpose specified.

In testimony whereof I sign this specification in the presence of two witnesses.

ROBERT F. OARTY.

Witnesses: I

CHARLES F. BURTON, EFFIE I. CROFT.