US731775A

US731775A - Locking-latch.

Info

Publication number: US731775A
Authority: US
Inventors: La Forest W Hall
Original assignee: Individual
Current assignee: Individual
Priority date: 1902-06-21
Filing date: 1902-06-21
Publication date: 1903-06-23
Anticipated expiration: 1920-06-23

Description

PATENTED JUNE 23, 1903.

No. 731,775. I

- LA FOREST w. HALL.

LOCKING LATCH. APPLICATION FILED mm: 21. 1902.

N0 MODEL.

INVENTOR C; Fbrgf 00.955152.

UNITED STAT S Patented June 23, 1909 PATENT ()FFICE.

LOCKING-LATCH SPECIFICATION forming part of Letters Patent N 0. 731,775, dated June 23, 1903.

Application filed June 21. 1902.

M y invention relates to that class of lockingi latches in which a single pivoted gravitating bolt serves the double'function of latch and locking-bolt, being especially directed to the mechanism for locking the bolt, and has for its objects to combine in such'mechanism simplicity of construction, facility of operation,

and efficiency in the performance of it-Sfunctions.

To these ends the invention comprises, in combination with a pivoted gravitating bolt, a vertically-disposed finger pivoted above the same, a sliding member adapted to swing Said finger into and out of engagement with the bolt, and operative connections between the sliding member and finger.

The invention also comprises the details of construction and combination of parts hereinafter described.

In the accompanying drawings, Figure 1 is a side elevation of a lock, having the side of the casing removed to expose to view the inter nal mechanism embodying my invention, the finger being disengaged from the bolt. Fig. 2 is a similar view showing the finger engagingand locking the bolt. Fig. 3 is a similar view of the parts removed from the casing andviewed from the opposite side. Fig. etis a sectional elevation of the bolt and its keeper.

Referring to the drawings, 1 indicates the casing of the lock, adapted, as usual, to inclose' the mechanism of the device and to be inserted into a mortised Socket in the door.

2 is a gravitating bolt pivoted, as at 3, and.

adapted to Swing on its pivot for engagement or disengagement with the keeper 4.

5 is a cam member lying beneath the bolt and adapted to be operated by the usual knobspindle (not shown) to raise the boltfor disengagement with the keeper, the engagement of the bolt with the keeper being due to gravity.

6 is a finger vertically disposed above thebolt and pivoted, asat 7, near its upper end and adapted to swing on its pivot into and out of Serial No. 112,634. (No model.)

engagement with the bolt for looking or releasing the same.

Sis a link pivoted at one end to the upper end of the finger and at its opposite end to the horizontally-sliding member 9, which is provided with an elongated slot 10 in engagement with a similarly-shaped lug 11, formed integral with the casing, which serves to hold the member 9 securely in place, but admit of its sliding freely under the action of key 12, Which'on being turned in the lock engages with the inclined faces or cam-surfaces 13'" and 13 formed by recessing the member 9, as at 13.

lat is a horizontal bar or lever pivoted to the casing back of the sliding member and provided with a lug 15, which engages with a lug 16 on the sliding member 9 to lock the latter in either of its two positions. The arm 14 extends within the path of the key 12, as at 17, so that when the latter is turned in the lock it.will lift the arm, disengaging lugs 15 and 1G, and permit the key in its further movement to operate the sliding member.

. 18 is a spring which exerts a constant downward pull upon the arm and maintains the lugs normally in engagement.

19 is a lug carried by the sliding member and bearing against the wall of the casing, thus steadying and guiding the member in its movements.

In the operation of locking the bolt, supposing the parts to occupy the positions shown in Fig. 1, the key is turned to the left and first engages and raises the arm 14, free- 'ing lug 15 from lug 16. As the key continues to turn it contacts with the. outer cam-surface 13 and moves the sliding member to the right, which in turn, through the medium of link 8, exerts a pull on the upper end of finger 6, which rocks the same on its pivot and throws its lower end intoengagement with and locks the bolt 2, as shown in Fig. 2. To unlock the bolt, the key is turned to the right and first raises the arm 14., then contacts with cam-surface 13", and forces theslide to the left, which rocks the finger (i on its pivot and throws its lower end out of engagement with the bolt.

Having thus described my invention, what I claim is-- 1. Ina lock, the combination with a pivoted bolt, of a depending finger disposed above the bolt and pivoted at its upper extremity, a longitudinally sliding member having a link inovably attached to the upper end of the finger, the said member being formed with a slot having oppositely-disposed cam edges for engagement by a key, and means for locking the sliding member to hold the same in either one oftwo positions.

2. In a lock, the combination with alongitudinally-extending gravitating bolt, avertically-disposed finger above the bolt and pivoted at its upper extremity, a slotted sliding member having a link pivoted thereto and Witnesses:

CHAS. A. ESTEY, FRED FARRAND.