US1020721A

US1020721A - Lock for car-doors.

Info

Publication number: US1020721A
Authority: US
Inventors: Frank Snyder
Original assignee: Individual
Current assignee: Individual
Priority date: 1911-11-09
Filing date: 1911-11-09
Publication date: 1912-03-19
Anticipated expiration: 1929-03-19

Description

F. SNYDER.

LOOK FOR CAR DOORS.

APPLICATION FILED NOV. 9, 1911.

Patented Mar. 19, 1912..

f /7 Z r a? WITNESSES [NVENTOR/ OLUMRIA PLANOGRAP" 50-. WASHINGTON, D. C.

FRANK SNYDER, OF COUNCIL BLUFFS, IOWA.

LOOK FOR CAR-DOORS.

Application filed. November 9, 1911.

Specification of Letters Patent.

Patented Mar. 19, 1912.

Serial No. 659,315.

To all whom it may concern:

Be it known that I, FRANK SNYDER, a citizen of the United States of America, and resident of Council Bluffs, in the county of Pottawattamie and State of Iowa, have in vented certain new and useful Improvements in Locks for Car-Doors, of which the following is a specification.

This invention relates to looks for car doors, the same being particularly adapted for use on doors of grain cars where seals are usually employed to guard against opening of the said doors by unauthorized persons. I

An object of this invention is to provide novel means associated with a car door whereby the door may be locked in closed position and duly sealed, the object of the invention being primarily to so arrange the arts that upon closing the door, the parts of the lock are in operative position and a locking bolt may be operated to retain the said lock in its closed position, the bolt being provided with a seal receiving slot which will prevent opening of the door without detection.

With the foregoing and other objects in View, the invention consists in the details of construction and in the arrangement and combination of parts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, reference will be had to the accompanying drawings forming part of this specification wherein like characters denote corresponding parts in the several views, and in which- Figure 1 illustrates a view in elevation of a fragment of a door and car body with the invention applied thereto; Fig. 2 illustrates a longitudinal sectional view of the locking members; and Fig. 3 illustrates a sectional view on the line 3-3 of Fig. 1 with the fragment of the door and car body omitted.

In these drawings l denotes a plate adapted to be secured to a car body, the said plate having ears 5 apertured to receive a retaining bolt 6, the said bolt having an eye 7 in its upper end designed for the reception of a chain or other flexible connection which will prevent its dislodgment from a car body. One of the ears, that is to say, the upper ear is provided with a screw 8 which extends into the aperture of the said car.

A plate 9 is secured to a car door, the said plate having lugs 10 provided with shoulders 1.1 which are adapted to pass beyond the vertical plane of the bolt (3, so that as the bolt 6 is seated in the apertures of the several ears 5, it will serve to engage the shoulders 11 of the lugs 10 and prevent movement of the door. The lower end of the bolt 6 is shown as having a shoulder 12 thereon, which is designed to be engaged by the inner end of the screw 8 to control the limit of upward movement of the said bolt. The bolt is further provided with a slot 13 adapted to receive a wire'l-t of a seal 15 such as is now commonly employed on freight cars. The plate l at points between the ears 5--5 is beveled as shown at 16 forming camming surfaces to guide the lugs 10 over the surface of the plate so that the lugs will be in positions between the ears for the purpose heretofore stated.

It has been found that locks for car doors made in accordance with this invention are strong and durable and are conveniently operated owing to the fact that the bolt falls by gravity into the openings formed in the ears 5. One side of the bolt 6 is preferably flattened as shown at 17, the said flattened surface of the bolt resulting in the formation of the shoulder 12, the purpose of which has already been stated.

I claim" In a sliding door lock, a plate, having apertured ears formed thereon, a bolt adapted to slide in the apertures of said ears and beveled surfaces between the ears and adjacent to the edge of the plat-e; a plate having shouldered lugs formed thereon said lugs adapted to lie between said ears in frictional engagement with said camming surfaces and engage said bolt.

In testimony whereof, I ailix my signature in the presence of two witnesses.

FRANK SNYDER.

\Vitnesses SARAH C. LARsnN, JOHN S. 'ENGELKE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.