US3206959A - Interchangeable lock cores - Google Patents

Description

Sept. 21, 1965 F. E. BEST INTERCHANGEABLE LOCK CORES Filed Feb. 28. 1963 iMiiQiibi-E 15:5 @3759 Q mijzm 43 SOLDER 0 m 3 u w u m w AAA/2f, 4 4 2 s 4 United States Patent 3,206,959 INTERHANGEABLE LOCK CORES Frank Ellison Best, P.0, Box 103, Indianapolis, Ind. Filed Feb. 28, 1963, Ser. No. 261,744 8 Claims. ((11. 70-373) This specification, taken in conjunction with the accompanying drawings show my new discoveries and inventions in interchangeable lock cores over the old structure first invented by me more than 40 years ago.

FIGURES 1 to 9 inclusive show the old core as it has been continuously manufactured since I an. 2, 1925.

FIGS. to 12 inclusive show the new core as herein disclosed and claimed.

A general object of this invention is to provide a lock core of the interchangeable lock controlled assembly type in which a combined key plug housing and tumbler pin housing is constructed substantially entirely of sheet metal parts that are suitably shaped by stamping, rolling, bending, folding and pressing and are soldered together in such a manner as to attain the following objects and advantages:

(l) Reduce material costs by using lesser amounts of less expensive types of materials.

(2) Reduce manufacturing costs by eliminating and simplifying old manufacturing processes and methods.

(3) Gain better concentricity of parts and improve contact surfaces by replacing machined extruded parts by roll-ups and fold-ups stamped out of less expensive sheet metal.

(4) Increase the life and strength of core parts.

(5 Improve the ease of operating the lock.

(6) Greatly simplify the assembly problems.

(7) Render the assembling and combinating of the cores more automationable.

These and other objects and advantages will be apparent upon examination of the following description and accompanying drawings.

FIG. 1 is a perspective view of the old figure-8 shaped core 14 with its control key 15 in vertical, insertable and Withdrawable position and with its locking lug 16 extended.

FIG. 2 is a perspective view of the same with its control key 15 turned a few degrees to the right from its position in FIG. 1 and with its locking lug 16 retracted by the slight movement of the key 15.

FIG. 3 is a vertical axial section of said old core 14 showing its control key 15 laid in, and its control shear line 17 lined up for shearing operation.

FIG. 4 is a vertical axial section of said old core 14 showing an operating key 18 laid in and its operating shear line lined up for shearing operation.

FIG. 5 is a transverse section of old core 14 as taken on line 55 of FIGS. 3, 4, and 7 showing old body 21 and housing 21 with its receptacle opening 22.

FIG. 6 is a transverse section of old core 14 as taken onlline 6-6 of FIGS. 3, 4, and 7 showing old body on y.

FIG. 7 is a side view of the old core 14 showing face 23, and locking lug 16 in extended position.

FIG. 8 is a transverse section of old core 14 in dotted silhouette outline 24 as taken on line 55 of FIGS. 3, 4, and 7 showing the old sleeve 25 in full section.

FIG. 9 is a transverse section of the same at taken on line 66 of FIGS. 3, 4, and 7.

FIG. 10 is a transverse section of the new core body 26, new sleeve 29 and housing 21 as taken on line 5-5 of FIG. 11.

FIG. 11 is a side elevational view, with parts broken away, of the new core body 26 showing parts of the key plug housing and parts of the tumbler pin housing 28 3,236,959 Patented Sept. 21, 1965 and face 32 and showing the combined locking lug and tumbler pin holder 30 in an extended position.

FIG. 12 is a transverse sectional view of the new core body 26 together with the combined locking lug and tumbler pin holder 30 and spacer sleeve 31, as taken on line 6-6 of FIG. 11.

The new core body 26 comprises key plug housing 27 and pin tumbler housing 28 and the new sleeve 29 comprises pin-tumbler holder 30 and spacer 31.

It is contemplated to make the key plug housing 27 of sheet metal rolled or otherwise similarly formed to the proper shape and to solder the same to the tumbler pin housing 28 at the locations indicated by 43 in FIGS. 10 and 12, using either silver solder or other suitable solder.

You will notice, FIG. 11, that pin tumbler housing 28 is soldered to new face 32 at 44.

In the past, we have made the old bodies 20, FIGS. 5 and 6 out of solid figure-8 shaped brass extrusions, by drilling holes 33 and 34 and broaching upper hole area 35 out of the solid bar extrusion stock. Thus about half of this extrusion material went into the scrap barrel. Also we were never able to satisfactorily keep said drilled holes 34 concentric with the outside outline 36 (FIGS. 5 and 6.)

Likewise we made the old sleeve 25, FIGS. 8 and 9, out of solid brass bar extrusion stock also by drilling holes 37 therethrough. Thus about half of this extrusion also went into the scrap barrel and here also we were never able to satisfactorily keep the inside and outside surfaces 38 and 39 respectively of these sleeves concentric. (See FIG. 8.)

Furthermore, the extruded material was much more costly per 1b. to fabricate than regular shapes and was procurable only from sources having the extrusion dies, which wa very restrictive and often caused expensive and damaging delays.

Furthermore, the drilling and broaching processes above mentioned were also very costly processes.

When I discovered that it was not necessary to make the sleeve out of a single integral piece of material, but that a plurality of segments could be securely trapped in place and could be used even to all the advantages recited above, this invention dawned on my mind.

Then I discovered that the body also could be fabricated advantageously by using a plurality of parts soldered together, FIGS. 10 and 12, in place of the old solid, onepiece body of FIGS. 5 and 6.

Then I discovered that pin tumbler housing 28 could be made of thicker gauge material than key plug housing 27 so as to improve the construction.

Almost concurrently with making these discoveries, I discovered that by using sheet metal with parallel and finely calendered surfaces for key plug housing 27, pintumbler holder 30, and spacer 31, all of our previous concentricity problems were solved as by magic, and at the same time the finely calendered harder surfaces worked upon each other with less friction, all of which contributed to a much superior lock core at a greatly reduced material and manufacturing cost.

FIGS. 9, l0 and 11 show primary lock mechanism made in accordance with my above outlined discoveries and adapted for use in a lock housing 21 which is the same as the housing 21 shown in FIG. 5. The new lock parts shown in FIGS. 9, 10 and 11 comprise a tubular key plug housing member 27 having a cylindrical portion shaped and sized to fit snugly and telescopically within the lowermost lobe or part of the figure-8 shaped receptacle in the lock housing 21 and further having an outwardly protruding hollow locking lug receiving portion of substantial width and depth which extends upwardly through the narrowed waist part of the figure-8 shaped receptacle into the uppermost lobe or part of said receptacle and recelves and houses the locking lug 30. Two terminal portions of the part of housing 27 which receives the locking lug 30 protrude upwardly, as shown in FIGS. and 12, and receive therebetween the pin tumbler housing 28 and are soldered to said housing 28 at the locations indicated by the numeral 43.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States of America, is:

1. In a lock of the classin which the assembly 'is lock controlled, a lock housing having therein a receptacle of substantially figure-8 cross sectional shape adapted to receive primarylock mechanism; a tubular key plug housing of thin sheet metal having a part of generally cylindrical cross sectional shape adapted to fit telescopically within one part of the figure-8 shaped receptacle in said lock housing; and a sheet metal tumbler pin housing soldered to said tubular key plug housing and adapted to be disposed in the other part of the figure-8 shaped receptacle in said lock housing.

2. In a lock of the class in which the assembly is lock controlled, a lock housing having therein a receptacle of substantially figure-8 cross sectional shape adapted to slidably and telescopically into one part of the figure-8 shaped receptacle in said lock housing and having a transversely protruding portion adapted to extend into the other part of the figure-8 shaped receptacle in said lock housing; and a sheet metal tumbler pin housing soldered to said transversely protruding portion of said key plug housing.

3. A look as defined in claim 2 wherein the substantially cylindrical portion of said key plug housing is transpierced by a spacer sleeve which fits snugly and is rotatively movable a limited amount in said substantially cylindrical portion.

4. In a lock of the class in which the asembly is lock controlled, a lock housing having therein a receptacle of substantially figure-8 cross sectional shape adapted to receive primary lock mechanism; a tubular sheet metal key plug housing including a substantially cylindrical portion adapted to fit telescopically into one part of the figure-8 shaped receptacle in said lock housing and a transversely protruding portion adapted to extend into the other part of the figure-8 shaped receptacle in said lock housing; a sheet metal tumbler pin housing soldered to said transversely protruding portion of said key plug housing; a tubular sheet metal spacer sleeve rotatively disposed and fitting snugly within the cylindrical part of said key plug housing; and a combined locking lug and tumbler pin holder rigid with said sleeve and movable by rotary movement of said sleeve into locking engagement with said lock housing.

5. A lock of the class in which the assembly is lock controlled comprising a lock housing having therein a receptacle of substantially figure-8 cross sectional shape formed of two intersecting parallel bores normally disposed one above the other and adapted to receive primary lock mechanism; a tubular sheet metal key plug housing including a substantially cylindrical part adapted to fit slidably and telescopically into the lowermost bore of the figure-8 shaped receptacle; a longitudinally disposed external transversely protruding portion on the substantially part of said key plug housing adapted to extend into the uppermost bore of said figure-8 shaped receptacle, said transversely protruding portion comprising a hollow locking lug receiving part having substantial width and depth and two flat parallel terminal parts extending upwardly from said locking lug receiving part; a sheet metal tumbler pin housing telescopically engaged with and soldered to said. two flat parallel terminal parts; a tubular spacer sleeve of thin sheet metal snugly fitting and 0p eratively disposed within the cylindrical part of said key plug housing; and a combined locking lu and tumbler pin holder rigid with said sleeve and operatively disposed for limited rotary movement at least partly Within said locking lug receiving part ofsaid key-plug housing.

6. A lock as defined in claim 5 wherein the spacer sleeve .is stamped out of sheet metal and rolled into cylind'rical shape and the combined locking lug and tumbler pin holder is a separately formed element rigidly attached to said spacer sleeve.

7. A lock as defined in claim 5 wherein the sheet metal of'which said lock core housing is formed is of uniformly calendered thickness.

8. A lock as defined in claim 5 wherein a lock face is soldered to an end portion of said sheet metal tumbler pin housing.

7 References Cited by the Examiner UNITED STATES PATENTS ALBERT H. KAMPE, Primary Examiner.

Claims (1)

1. IN A LOCK OF THE CLASS IN WHICH THE ASSEMBLY IS LOCKL CONTROLLED, A LOCK HOUSING HAVING THEREIN A RECEPTACLE OF SUBSTANTIALLY FIGURE-8 CROSS SECTIONAL SHAPE ADAPTED TO RECEIVE PRIMARY LOCK MECHANISM; A TUBULAR KEY PLUG HOUSING OF THIN SHEET METAL HAVING A PART OF GENERALLY CYLINDRICAL CROSS SECTIONAL SHAPE ADAPTED TO FIT TELESCOPICALLY WITHIN ONE PART OF THE FIGURE-8 SHAPED RECEPTACLE IN SAID LOCK HOUSING; AND A SHEET METAL TUMBLER PIN HOUSING SOLDERED TO SAID TUBULAR KEY PLUG HOUSING AND ADAPTED TO BE DIS-

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