US1747120A - Trunk lock - Google Patents

Description

Feb. 11, 1930. LQNG 1,747,120

TRUNK LOCK Filed Sept. 15. 1928 Patented Feb. 11, 1930 PATENT GFFICE ALLEN T. LONG, OF PETERSBURG, VIRGINIA TRUN K LOCK Application filed September 15, 1928. Serial No. 306,114.

This invention relates to trunk locks and has for an important object thereof the. provision of a lock of this character in which the number of parts and the number of steps in manufacture are materially reduced and in which the facilities for key changes are increased.

A more specific object of the invention is the provision of an improvement of the lock plate construction which operates the belts in this type of lock to eliminate the use of extra pins and the lock for guiding the plate and providing the operating connection between the plate and the bolts.

A further and more specific object of the invention is to provide a single unitary plate which may be produced by stamping and which will serve at once to provide the tripping elements for the bolts, the guide for the key barrel and stops for the key.

A still further object of the invention is to provide in a lock of this character a construction such that a plate entering into the normal construction of the lock is enabled to act as a tumbler plate, affording key changes.

These and other objects I attain by the construction shown in the accompanying drawing, wherein for the purpose of illustration is shown a preferred embodiment of my invention and wherein Figure 1 is a side elevation partially in section of a trunk lock constructed in accordance with my invention; I

Figure 2 is a view of the lock cup with the key plate and barrel removed;

Figure 3 is a similar view with the key plate in position, the barrel being shown in section;

Figure at is a section on the line 4:4: of Figure 1;

' Figure 5 is a front elevation of the lock;

Figure 6 is a fragmentary plan of a slightly modified form of key plate;

Figure 7 is a side elevation of the key illustrating the key notches provided by the lock arrangement disclosed.

Referring now more particularly to the drawing, the numeral 10 generally designates the hinge plate of a trunk lock, the numeral 11 a lock cup and the numeral 12 a cap.

Arranged within the cup are a pair of bolts 13, each having at its inner end an angular shoulder 14, the purpose of which will presently appear. These bolts, as in the usual construction, are urged outwardly by a spring 15 and have associated therewith the usual guide pins 16.

In accordance with my invention, the upper surfaces of these bolts, which are usually provided with pins for co-action with an oscillatable key plate, are made perfectly smooth. The key plate employed as at present illustrated comprises a single metallic disk 17 having downwardly extending pressed lugs 18 adapted to extend behind the angular shoulders 14 to withdraw the bolts as the key plate is rotated. The periphery of the key plate rotatably fits the side wall 19 in the cup and at its axis, this plate has an opening 20 for the reception of the tip 21 of the key. Surrounding this aperture is an interrupted annular ridge 22 defining a circular seat about the opening for the reception of the lower end of a rotatable lock barrel 23.

This ridge may be formed with one or more interruptions, being at present disclosed as comprising three sections 24, 25 and 26. The adjacent ends of the sections 25 and 26 are in the form of abrupt shoulders 27, providing key stops, while the adjacent ends of the sections 24, 26 and 2 k and 25 have sloping shoulders, indicated at 28, over which'the inner end of a key may sweep until it arrives in alignment with the spacebetween the shoulders 27. A ridge 22 may, however, be provided, whose sole interruption lies between the shoulders 27, as illustrated in Figure 6.

The lock barrel 28 has the usual key slot 29 and at its upper end is formed with the usual head 30 having a reduced extension 31 usually of the same size as the main portion of the barrel. The lock plate 10 and cap 12 are provided with apertures receiving respectively the barrel intermediate its ends and the extension 31, the cap seating upon the upper surface of the lock plate and being secured to the cup by securing elements 32, extending through the lock plate. Thus, the cap serves to position the outer end of the lock barrel while the key plate 17 positions the inner end thereof. It will be obvious that with the structure illustrated, two notches or tumbler slots may be formed in the key, one to accommodate the edge of the cap opening, indicated at 33, and the other to accommodate the edge of the plate opening, indicated at 34. It will also be obvious that by differently offsetting the metal of the lock plate 10 about the edges of the opening for differentlocks, the space between these key notches will be altered for different locks, providing a number of key changes without resortin to lengthening of the lock barrel, which necessitates a change in the cap or of inserting additional tumbler plates, which leads to difficulties in assembling.

At the same time, the lock barrel is rigidly maintained in its proper position in the lock.

It will be obvious that a lock of this character may be manufactured at a very low costand will be very durable and efficient in serv ice. It will also be obvious that the construction hereinbefore set forth is capable of a certain range of change and modification without materially departing from the spirit of the invention and I accordingly do not limit myself to such specific structure eX- cept as hereinafter claimed.

I claim 1. In a look, a casing, a bolt within the casing and spring-pressed to project therefrom, a plate seated upon the bolt and rotatable within the casing, a key barrel seated upon the plate at the axis thereof, an integral interrupted rib upon the plate preventing transverse displacement of the key barrel and the ends of which formkey stops, and means upon the plate having engagement with the bolt and retracting the same as the plate is rotatet 2. In a lock, a casing, a bolt within the cas ing and spring-pressed to project therefrom, a plate seated upon the bolt and rotatable within the casing, a key barrel seated upon the plate at the axis thereof, an integral interrupted rib upon the plate preventing transverse displacement of the key barrel and the ends of which form key stops, and an integral lug upon the plate having engagement with the bolt retracting the same as the plate is rotated.

3. In a lock, a. casing, a bolt within the casing and spring-pressed to project therefrom, a plate seated upon the bolt and rotatable within the casing, a key barrel seated upon the plate at the axis thereof, an integral interrupted rib upon the plate preventing transverse displacement of the key barrel and the ends of which form key stops, means upon the plate having engagementwith the bolt retracting the same as the plate is rotated, a cap for the casing having engagement with the outer end of the key barrel preventing transverse displacement thereof or longitudinal movement of the barrel permitting its disengagement from the shoulder of said plate, and a plate secured between the casing and cap fitting the key barrel at a point intermediate the ends thereof.

4. In a lock, a casing, a bolt within the easing and spring-pressed to project therefrom, a plate seated upon the bolt and rotatable within the casing, a key barrel seated upon the plate at the axis thereof, an integral in terrupted rib upon the plate preventing transverse displacement of the key barrel and the ends of which form key stops, means upon the plate having engagement with the bolt retracting the same as the plate is rotated, a cap for the casing having engagement with the outer end of the key barrel preventing transverse displacement thereof or longitudinal movement of the barrel permitting its disengagement from the shoulder of said plate, and a plate secured between the casing and cap fitting the key barrel at a point intermediate the ends thereof, said plate being ofiset about the edges of the barrel receiving opening thereof.

5. In a look, a casing, a bolt within the easing and spring-pressed to project therefrom, a rotatable key plate seated upon the bolt and having engagement with the bolt whereby the bolt is retracted as the plate is rotated, a cap for the casing, a nonrotatable plate secured between the cap and easing, a key barrel having a head provided with a reduced extension engaging in an opening in the cap and fitting within an opening formed in said plate, the key plate having means associated therewith forming a socket to rotatably receive the inner end of the key barrel said inner end abutting against the key plate.

6. In a look, a casing, a bolt within the easing and spring-pressed to project therefrom, a rotatable key plate seated upon the bolt and having engagement with the bolt whereby the bolt is retracted as the plate is rotated, a cap for the casing, a plate secured between the cap and easing, a-key barrel having a head provided with a reduced extension engaging in an opening in the cap and fitting within an opening formed in said plate, the key plate having means associated therewith forming a socket to rotatably receive the inner end of the key barrel and against which the barrel abuts, said plate about the edges of the barrel receiving opening being offset.

7. A trunk lock comprising a plate, a cup disposed at one side of the plate, a cap disposed at the opposite side of the plate and secured to the cup through the plate, a pair of oppositely acting spring-pressed bolts within the cup and having smooth upper surfaces, 2. key plate seated upon said bolts and rotatable in the cup, a key barrel having a head engaging the inner face of the cup and an extension upon said head fitting an opening in the cup, the plate having an opening receiving and fitting the key barrel, means upon the key plate having engagement with the bolts retracting the same as the key plate is rotated, and means upon the upper surface of the key plate combining therewith to guide the key barrel and provide stops for engagement with a key inserted therethrough.

8. A trunk lock comprising a plate, a cup disposed at one side of the plate, a cap disposed at the opposite side of the plate and secured to the cup through the plate, a pairof oppositely acting spring-pressed bolts within the cup and having smooth upper surfaces, a key plate seated upon said bolts and rotatable in the cup, a key barrel having a. head engaging the inner face of the cup,

and an extension upon said head fitting an opening in the cup, the plate having an opening receiving and fitting the key barrel, means upon the key plate having engagement with the bolts retracting the same as the key plate is rotated, and means upon the upper surface of the key plate combining therewith to guide the key barrel and provide stops for engagement with a key inserted therethrough, the means coasting with the bolts and the means positioning said key barrel comprising integral portions of the key plate.

9. A trunk lock comprising a plate, a cup disposed at one side of the plate, a cap disposed at the opposite side of the plate and secured to the cup through the plate, a pair of oppositely acting spring-pressed bolts within the cup and having smooth upper surfaces, a key plate seated upon said bolts and rotatable in the cup, a key barrel having a head engaging the inner face of the cup and an extension upon said head fitting an opening in the cup, the plate having an opening receiving and fitting the key barrel, means upon the key plate having engagement with the bolts retracting the same as the key plate is rotated, and means upon the upper surface of the key plate combining therewith to guide the key barrel and provide stops for engage ment with a key inserted therethrough, said plate being ofiset about the edges of the barrel receiving opening.

In testimony whereof I hereunto affix my signature.

ALLEN T. LONG.

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