US405050A

US405050A - County

Info

Publication number: US405050A
Authority: US
Publication date: 1889-06-11
Anticipated expiration: 1906-06-11

Description

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(man W. W. auf. P. PURSEL. LATCH AND LOCK COMBINED.. 100.405.050. PatentedJune 1l, 1880.

W1 TNESSES N. PETERS. Phnlwlilhognpbr. Walhingun. D. C.

, UNITED STATES PATENT OFFICE.

WILLIAM lV. PURSEL AND FRANK P. PURSEL, OF BERVICK, COLUMBIA COUNTY, PENNSYLVANIA.

LATCH AND LOCK ColvlBlNED.

SPECIFICATION forming part of Letters Patent N0. 405,050, dated J une 11, 1889. Application filed March 29, 1888. Serial No. 268,825. (Model.)

To all whom t may concern:

Be it known that we, WILLIAM W. PURsEL and FRANK P. PURSEL, citizens of the United States, residing at Berwick, in the county of Columbia and State of Pennsylvania, have invented new and useful Improvements in Latches and Locks Combined, of which the following is a specification.

Our invention relates to improvements in locks; and it has for its object to provide improved means for connecting and disconnecting the outside and inside knobs.

The invention consists in a certain novel construction and combination of devices, fully set forth hereinafter in connection with the accompanying drawings, wherein- Figure l is a perspective view of the lock. Fig. 2 is a front view with theface-plate removed. Fig. 3 is a horizontal sectional view of the lock on the line a: o: of Fig. 2. Fig, 4. is a detail sectional view of the knob-shaft, t-aken longitudinally. Fig. 5 is a detail View of the key.

Referring by letter to the drawings, A designates the case of the lock. B designates the sliding bolted mounted therein. C designates a spring bearing against a shoulder b on the bolt and norinallyholding it extended, and D designates a cross-head at the rear end ofthe bolt. A tumbler E is mounted in the casein front of the said cross-head, whereby when it is rotated one of its ends bears against the cross-head and retracts the bolt, and the barrel F of the tumbler is tubular, and is provided in one side with a longitudinal slot G. The bolt is provided near its front end with a socket H, which aligns with an aperture I in the side of the lock when the bolt is eX- tended, and a spring-latch K is attached to the side of the lock, and is provided with a pin k, which projects through the said aperture and engages the socket to hold the .loolt in its extended position.

L represents a tubular knob-shaft, which is mounted at its inner end in the barrel of the tumbler, and 'is' provided on one side with a rib M, which engages the longitudinal slot therein and enables the tumbler to be rotated by the shaft. A knob N is attached to the outer end of the shaft L,'and a shoulder n is formed in the interior of the shaftashort disj tance from'its outer end.

A knob-shaft O is mounted in the tubular shaft, and is provided at one end with ahead o, which engages the shoulder n and prevents the shafts from being drawn apart, but allows independent rotation thereof. This shaft O is provided on one side with a longitudinal groove or notch P, which is adapted to be aligned with an aperture S in the side of the tubular shaft, and a spring-latch R is mounted on the side of the tubular shaft, and is provided with a pin r, which projects through the said aperture and engages the groove or notch, thereby locking the shafts together for simultaneous operation. The outer end of the shaft O is squared to enable the knob Q to be secured thereon.

When the latch R is in its engaging position, it rests in a longitudinal groove s in the side of the tubular shaft, and a sliding ring or handle T is mounted on the saidllatch,and is adapted to be moved from one end to the other of the same. When the said ring or handle is located at the free end of the latch, it fits in a transverse groove s' in the side of the tubular shaft, and therefore allows the pin r to engage the groove or notch in the inner shaft; but when the ring or handle is drawn outward toward the other end of the latch it raises the same out of the said longitudinal groove s and withdraws the pin r out of engagement with the groove or notch in the inner shaft.

U represents the ward of a key, which is mounted permanently in the casein such a y position that when turned it will engage one end of the Vcross-head on the bolt and retract the latter. This ward is provided with the short post V, which projects slightly beyond the side of the case, and is provided with a longitudinal groove W, and when it is desired to operate the ward a key having a tubular shank provided in one side with a longitudinal rib or a stud is engagedover the said post in such a manner that the said rib or stud will engage the groove in the latter.

The operation of the improved lock is as follows: The knob having the tubular shaft attached thereto is placed on the inside ofthe door, and as it -operates directly 011 the bolt the door may be opened at any time from the inside, but can only be opened from the outside when the interior shaft is locked to the IOO tubular shaft. The means for so locking the said shafts together are mounted on the tubular shaft, and therefore the improved lock performs the additional function of a deadlatch.

It will be seen that knob-shafts thus connected may be applied to any ordinary lock, so thatltheir usefulness is not confined to the lock herein described.

The spring hereinbefore mentioned is peculiarly adapted to actuate the boltv promptly Without much strain l on the spring. The spring is of such a length as t0 reach from one side of the lock-case to the other, and it bears at its ends against the front side 0f studs or shoulders c e at the sides of the case. Thus the full lengt-h of the spring is free to be bent, and the bolt is provided with a rounded shoulder b, (above mentioned,) which bears against the center of the said spring.

The principal reason for the frequentbreakage of springs in locks of this character is, that they are ordinarily short and are bent abruptly; but in the improved lock the spring is very long, and consequently the bend is gradual and comparatively slight.

Having thus described the invention, what we claim, and desire to secure by Letters Patent of the United States, is-

l. In a lock, the combination of the tubular shaft connected to the tumbler, the shaft O,

mounted in the tubular shaft and having a groove or notch in its side adapted to be aligned with an aperture in the tubular shaft, the spring-latch mounted on the tubular shaft and engaging the said aperture and groove or notch, and the sliding ring or handle T, mounted on the latch, all constructed, arranged, and operated substantially as and for the purpose specified.

2. In a lock, the combination, with the tu1nbler having a barrel provided with a groove, of the tubular shaft mounted in the said barrel and having a rib M on its side engaging the said groove, the removable knob on the end of the shaft, the knob-shaft O, mounted in the tubular shaft and having a head o engaging a shoulder n in the tubular shaft, the knob attached to the shaft O, and the springlatch R, mounted on the tubular shaft and adapted, When in its normal position, to lock the said shafts together, substantially as specified.

In testi mony that we claim the foregoing as our own We have hereto aiiixed our signatures in presence of two Witnesses.

WILLIAM W. PURSEL. FRANK P. PURSEL.

Witnesses:

C. W. MILLER, S. F. PEAoooK.