US288871A - Permutation-lock - Google Patents

Description

Modem i 2 Sheets-Sheet 2.

R. SOHUETZE. PERMUTATION LOCK. No. 288,871. Patented Nov. 20, 1883.

l l l I l I i I INVENTOR:

l lD MW I ATTORNEYS.

WITNESSES NITED STATES PATENT OFFICE.

ROBERT SCHUETZE, OF SAN ANTONIO, TEXAS.

PERMUTATION-LOCQK.

SPECIFICATION forming part of Letters 'Fatent No. 288,871, dated November 20, 1883.

Application filed June 23, 1883.

To :25 whom it may concern:

Be it known that I, Bonner Scnon'rzn, of

7 San Antonio, in the county of BeXa-r and State drawings, forming a part of this specification,

in which similar letters of reference indicate corresponding parts inall the figures.

Figure 1, Sheet 1, is an elevation of the outer side of my improvement, the plate of the lockcasebeing removed. Fig. 2, Sheet 1, is asecshown in sections.

release the bolt.

tional plan view of the same, taken through the line w r, Fig. 1. Fig. 3, Sheet 2, is an elevation of the inner side of the lock, part of the case-plate being broken away. Fig. 4, Sheet 2, is an elevation of the combination scale-plates, the knob-spindle and fastening-screws being Fig. 5, Sheet 2, is an elevation of a part of the operating mechanism of the lock. Fig. 6, Sheet 2, is a side view of. one of the keys. Fig. 7 is an elevation of the bolt, showing a modification. I

The object of this invention is to provide combination-locks simple in construction, inexpensive in manufacture, strong, durable, not liable to get out of order, and reliable in use.

The invention consists in a combination-lock constructed with a sliding spring-pressed bolt,

a lifting plate and aspring-prcssed lever-catch engaging with the said bolt, three eight-toothed wheels having unequal teeth and engaging with each other and the bolt, plate, and catch, and a knob and knobspindlc connected with one of thetoothed wheels,whereby the said plate and catch can be operated to release the bolt, and the said bolt can be drawn back by operating the said knob. Tothe knob is adjustably at tached a scale.-plate,which is surrounded by a stationary annular scale-plate attached to the door, whereby it can be known when the toothed wheels come into the right position to The key-hole escutcheon is made with cross-head ends and a longitudinal slot widened at its center, and is kept in place bytwo plates having their edges rabloeted to receive the said escutoheon and allow the escutcheon to be adjusted to hold the key from turning, as will be hereinafter fully described.

(Modem A represents the case of the lock, which may be so formed as to adapt the lock for use as a rim-lock, as shown in Figs. 1 and 3, or as a mortise-lock, as shown in Fig. 2 and in dotted lines in Fig. 3, as may be desired.

B is the bolt, which is made with an oiiset, as shown in Fig. l. The bolt B is thrownand held forward by a spiral spring, 0, placed in a slot, D, in the lower part of its offset, and the forward end of which presses against the said bolt at the forward end of the slot D. The rear end of the spring 0 rests against a stud, E, attached to a plate of the lock-case A, and which projects into the slot D, and serves as a guide to the bolt B in its forward and rearward movements. In the upper part of the offset of the bolt B is formed a slot, F, into which projects a stud, G, attached to a plate of the lock-case A, and serving as a guide to the said bolt in its forward and rearward movements, and as a pivot to the said bolt in its oscillating movements. The bolt B is held from a rearward movement when its rear end is lowered by a stud, H, attached to a plate of the lock-case A, and which enters a recess, I, in the lower edge of the rear end of the said bolt. The stud H also serves as a stop to limit the downward movement of the said rear end of the bolt B. The upward movement of the bolt B is limited by a stud, J, attached to a plate of the lock-case A, and which also serves as a guide to the bolt in its forward and rearward movements. In the rear end of the bolt B are formed one or more teeth, K, with which engages a lever-catch, hereinafter described, to hold the said rear end of the bolt B from being raised. In the lower edge of the offset of the bolt B is formed a tooth, L, with which engages a. toothed wheel, hereinafter described, to draw the said bolt back, and thus unlock the door.

'M is a liftingl'plate, which is arranged with its upper end beneath the edge of the rear part of the bolt B, and has a rearwardly-pro jecting arm upon its lower end to receive the pivot'N, attached to aplate of the case A, and upon which the said plate M works. In the forward edge of the lifting plate M is formed a recess or slot, 0, to receive the stud 1?, attached to a plate of the case A, to limit the upward and downward movement of the said plate. The lower part of the rear edge of the lifting plate M is concaved upon the arc of a circle having its center in the axis of the key 6, and upon the upper part of the said rear edge is formed a shoulder or tooth, M, for the bit of the key to strike against and raise the said plate.

Q is a lever-catch, which is pivoted at its lower end to the lower rear part of a plate of the case A, and is held forward by a spring, R, which rests against the rear edge of the said catch Q, and is attached to the plate of the case A or to the. catch Q. In the latter case the free end of the spring rests against a stud attached to the side plate of the lock-ease. The upper end of the catch Q projects forward and has a tooth, S, formed upon it, to engage I the offset of the bolt B, and has seven short teeth, which are made of such a length as to pass the bolt-tooth L when the forward part of the said bolt is lowered, and one long tooth of such a length as to pass the bolt-tooth L only when the forward end of the bolt B is raised. The wheel U is made with one long tooth, with its second, fourth, fifth, seventh, and eighth teeth of medium length, to correspond with the short teeth of the wheel T, and with its third and sixth teeth short. The wheel U is so placed that its long tooth will engage with the forward part of the lower end of the lifting plate M and raise it. To raise the rear end of the bolt B its long and medium teeth will engage with the long and short teeth of the wheel T, and its short teeth will only engage with the long tooth of the said wheel T. The wheel Vis made with one long tooth, with its second, fourth, sixth, seventh, and eighth teeth-of medium length, and with its third and fifth teeth short. The wheel V is so placed that its long tooth will engage with a rounded downward projection formed 011 the lower edge of the middle part of the levercatch Q, its long and medium teeth will engage with the long and medium teeth of the wheel U, and its short teeth will only engage with the long tooth of the said wheel U. The wheel T is made with a hub of sufficient length to enter and work in round holes in the side plates of the case A, and thus serve as a pivot to the said wheel. The bore of the hub of the wheel T is made square to receive and fit upon the spindle W, one or both ends of which project and have knobs X secured to them by screws Y, several holes being formed in the said spindle to allow the lock to be fitted to doors of different thicknesses.

Z is a plate through which the knob-spindle W passes, and which is secured to the base of the knob-shank by two screws, a. The screws a pass through curved slots 1) in the plate Z, as shown in Fig. 4, so that by loosening the screws to the plate Z can be adjusted to change the combination. The edge of the plate Z is beveled upon the outer side to fit into the inner edge of the annular plate, 0, which is correspondingly beveled upon the inner side, and which is designed to be secured to the door by two or more screws, d, as shown in Fig. 4.. Upon the adjacent edges of the plates Z c are formed scales of eighty (more or less) equidistant division-marks, which are numbered by tens, or in any other convenient manner.

With this construction, when the lock is to be unlocked from the outer side of. the door, the knob X is turned to the left untilby the engagement of the wheels T U W the wheel V has been revolved to bring the long tooth of the said wheel upward and cause it to raise the lever catch Q. The knob X is then turned to the right until the engagement of the wheels T U has revolved the wheel U to bring the long tooth of the said wheel upward and cause it to raise the lifting plate M and raise the rear of the bolt B. The knobX is then turned to the left until the long tooth of the wheel T engages with the tooth L and draws back the bolt B. Care must be taken each time not to turn the knob X too far, or the long tooth will be carried past the vertical position and the whole operation will have to be repeated. As the knob X must always be in exactly the same positions, when the long tooth is in the positions to do work, by noticing the numbers upon the scale of the plate 0 which some particular number of the scale upon the plate Z is opposite, when the said long teeth come into position, which numbers form the combination, and by carefully observing these numbers when unlocking the lock, the operation can be readily performed. The combination can be changed at any time by detaching the knob X, loosening the screws a, and moving the plateZ forward or backward a certain number of marks.

To open the lock from the inside, insert the two-bit key 6 in the rear keyhole, f, and turn the said key to the right through a quarter of a revolution and secure it in position by slidin g the escutcheon g downward. Then insert the single-bit key It inthe forward key-hole, '13, and turn the said key to the left, which draws back the bolt B andunlocks the door. When there is a knob at each side of the door, the singlebit key is not required, and the bolt is drawn back by turning the inner knob.

In locks where it is preferred to have the bolt B remain in place when drawn back, in* stead of shooting forward when the knob is turned to the left after drawing the bolt, the stud G is placed a little farther forward in the slot F of the bolt 13 than the position shown in Fig. 1, so as to prevent the said bolt from sides of the said eseutcheon g by screws k. The

under sides of the inner edges of the plates j are rabbeted to receive the side edges of the escntcheon g, and thus keep the said eseutcheon in place, while allowing it to move up and down freely, the cross-head ends keeping it from sliding out of place. The escutcheon g is slotted longitudinally to receive the key e, and the iniddle part of the said escutcheon is enlarged to allow the stem of the said key to turn. The stem of the key is made square, so that the said key can. be held from turning by sliding the escutcheon downward to bring the narrow part of its slot upon the square stem of the key e. I

When the lock is to be used as a chest-lock, the forward end of the bolt B is out off, and L- shaped slots Z are formed in the upper edge of the bolt B, to form catches m to enter keepers n, attached to the lid of the chest.

When the lock is to be used as a drawerlock, the forward part of the bolt B is cut away, and upon the upper edge of the said bolt is formed a lug, to which is pivoted a small bolt, which passes out in an inclined direction through a guide-slot in the upper edge of the lock-case, and has its upper end beveled, so that a forward movement of the bolt B will cause the said pivoted bolt to approach a vertical position, and thus be projected to lock the drawer.

If desired, the spiral spring G can be re placed by a straight or other shaped spring attached to the lock-case and resting against the rear shoulder of the offset of the bolt B.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent 1. A. combination lock constructed substantially as herein shown and described, and consisting of the sliding spring-pressed bolt B, having the tooth L and recess I, the stop H, the lifting plate M, the spring-pressed lever-c'atch Q, the three eight-toothed wheels T U V, and the knob X and knobspindle W, as set forth.

2. In a combination-lock, the combination, with the spring-pressed bolt B, having recess I and teeth K on its rear end, of the stop H, the lifting plate M, having a curved rearwardly-projeeting arm, and a notch, O, which receives stud P, and the spring lever-catch Q, having a tooth, S, and incline Q, said plate and catch being adapted to be operated by the bit of a key, substantially as herein shown and described, whereby the said plate and catch must be operated before the bolt can be drawn back, as set forth.

ROBERT SCHUETZE.

Witnesses:

FRED BADER, M. VVEYEL, Jr.

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