US377A

US377A - Turnek whitehouse

Info

Publication number: US377A
Authority: US
Publication date: 1837-09-08
Anticipated expiration: 1854-09-08

Description

AM. PHOTO-LITHO. CILNM SSSSSSSSSSSSSSSS $1 TURNER VHITEHOUSE, OF BOSTON, MASSACHUSETTS. D

CONSTRUCTION 0F DOOR-LOCKS.

To all whom t may concern:

Be it known that I, TURNER VHITEHOUSE, of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Mode of Preventing Friction and Wear in Door-Locks, called Turner Whitehouses Improved Door-Lock, of which the following is a true and exact description.

The nature of my invention consists in adapting certain parts of the common lock for the reception of friction wheels, and for the application of the same, which I apply in the following manner. Having made the box in the common form and placed therein the wards and key fitted to them, I proceed to form and adapt the lock-bolt. This I form by making the shaft, about one fourth as thick as its head, which slides through the front plate, by taking oif a part of the shaft on each, side; but more from the under side than from the upper side; as may be seen, marked, A, in Plate 1, Figures 5 and 6. Also Plate 2, Fig. 1. Thus I furnish a space between the shaft of the lock-bolt and the under plate of the lock for the reception of the dog F, and its friction wheel, C, which I swivel on the dog, by the pin, K; and in such a position that the key, a, may play against its periphery, while raising the dog to unfix the lock bolt, instead of rubbing against the dog itself. (Vide P. 1, Figs. 5 and 6.) I also furnish another space between the upper side of the shaft of the lock bolt and the upper lock plate, for the purpose of accommodating two friction wheels, (marked D, and 12,) which I swivel on the upper side of the shaft of the lockbolt, in such a position as that the key plays between them, alternately escaping the periphery of the other while locking or unlocking; and therefore moves with much more freedom and ease than when it rubs against the lock bolt itself. (Vide P. 1, Fig. 5, and P. 2 Fig. 1.)

I make a mortise either through or a part way through the shaft of the lock bolt, near to the end, and longitudinally fitted to slide on a short stud standing fast and perpendicularly in the lock plate. (Marked N. P. 1,

Figs. 5 and 6.) In the edge of the shaft of the lockbolt I out two nitches, a little deeper than a half round, whose distance from each other is equal to the distance the lock bolt slides in locking and unlocking. These nitches alternately receive the neck of the pin, vK, fixing the lock bolt whether locked or unlocked. (Vide P. 1, F. 5.) After the dog has been raised (as in Fig. 5,) itis forced down again by Va longitudinal spring, (marked L Thisy spring acts on the periphery of t e friction wheel, O, as in Figs. 5 and G. There are two more friction wheels (P, P,) so adapted as to free the tumbler Gr, from friction. (Vide P. 2, Fig. 1.)

The latch bolt, R, is made narrower at that part where the appendage of the tumbler plays over it, and is bent at right angles, forming a foot, Q, about an inch long, and

slides on the lower plate of the lock, directlv behind the tumbler; and its shaft is parallevl` with the shaft of the lock bolt. There is a friction wheel, S, swiveled upon the foot of the latch bolt in such a manner that its pe- Y riphery bears against the center of the appendages of the tumbler.v The face of the appendages is excavated. This excavation is marked, z'; it is for the friction wheel to rest in, and aords two bearings for it. (Vide Plates 1 and 2, Figs. 2, 3, and 4.) This friction wheel, S, revolves on the pin, T, on the neck ofwhich is swiveled one end of a small connecting arm V,-the other end of which arm is swiveled on another pin, U, fixed in the shaft of the lock bolt nearthe back end. (Vide P. 2, Fig. l.) Because the end of the lock bolt slides steadily on the above mentioned pin, or stud, N, the arm V affords a guide for the direction of the back end of the latch bolt. (Vide P. 2 Fig. 1 and P. 1 F. 2 dotted lines.)

The latch bolt is forced out through the face of the lock by the spring, W, which acts against the friction wheel, X, swiveled near the end of the short arm, little w. This arm is swiveled on a pin a little back of the friction wheel, thence extending forward to the foot of the latch bolt, it receives the friction Y wheel, ZV, which plays against the foot of the latch bolt and forces it out. (Vide P. 1, Fig. 2.)

.aan Aram joFFicE. i

What I claim as my invention and improvement, and desireto secure by Letters` Patent, is-

The application of the several friction Wheels, and the adaptation of the Various Aence of the Witnesses Whose names are hereparts of the 100k for the reception of the unto subscribed, on the 21st day of Augt. friction Wheels as represented in my draw- A. D. 1837.

ings, and referred to in my specieation. TURNER WHITEHOUSE. 5 In testimony 'that the above is a true speci- Witnesses:

oation of my invention and improvement, AUGUSTUS PEABODY,`

I here unto subscribe my name in the pres- JOHN DWIGHT.