US1746849A

US1746849A - Door dovetail

Info

Publication number: US1746849A
Application number: US221419A
Authority: US
Inventors: Fred W Beyer
Original assignee: National Stamping Co
Current assignee: National Stamping Co
Priority date: 1927-09-23
Filing date: 1927-09-23
Publication date: 1930-02-11
Anticipated expiration: 1947-02-11

Description

F. W. BEYER DOOR DOVETAIL Feb. ll, 1930.

Filed Sept.k 23, 1927 Hlmlllml Patented Feb. 11, 1930 UNITED STATES maan PATENT OFFICE FRED W. BEYER, OF DETROIT, MICHIGAN, ASSIGNOR TO NATIONAL STAMPING COMPANY, A CORPORATION OF MICHIGAN noon :DOVETAIL Application filed September 23, 1927.

This invention relates to door dovetails, the principal object being to provide a new and novel construction simple in design, efficient in operation, that will not deteriorate 5 from age, and is economical to produce.

Another objectis to provide a door dovetail member comprising a circularly shaped housing closed on one side and provided with a member within the same comprising a pair 0 of arcuate segments engaging the circular walls of the housing and joined at one end to the free ends of a U shaped member, spring means urging the opposite end of the segments apart whereby to exert a tendency to 5 close the mouth of the U, and a plate overlying the housing and provided with an opening overlying the U shaped member.

A further object is to provide a door dovetail member comprising a casing having a recess provided with a curved wall, a member lying within said recess comprising a U shaped portion provided with outwardly eX- tending free ends slidably engaging the curved wall, the sides of the U shaped portion being angular in section and the remainder being flat in section, spring means being provided between the free ends of the outwardly extending end portions of the member, a slot being provided in the casing in line with the open end of the U shaped portion, and a plate member overlying the casing enclosing the recess, the plate member being provided with an opening in line with the opening in the wall of the casing and extending centrally of the U shaped portion of the member within the casing.

The above being among the objects of the present invention the same consists in certain features of construction and combinations of parts to be hereinafter described with reference to the accompanying drawing, and then claimed, having the above and other objects in view.

ln the accompanying drawing which illustrates a suitable embodiment of the present invention and in which like numerals refer to like parts throughout the several views,-

Fig. l is a perspective phantom view of the edge of a door showing the male member of a door dovetail positioned thereon.

Serial No. 221,419.

Fig. 2 is a perspective view of a door frame member provided with the female member of a door dovetail constructed in accordance with the present invention secured thereto in a position to cooperate lwith the male member sjhown secured to the edge of the door in ig. l.

Fig. 3 is a face view of the door dovetal member shown in Fig. 2, parts of the same being broken away and other parts being shown in partial section to better illustrate the Vconstruction of the same.

Fig. 4; is a sectional view taken on the line 4-4 Fig. 3.

Fig. 5 is a. view of the free end of one of the circular side portions of the holding member of the door dovetail member shown in Fig. 3 taken in the same direction as Fig. 4, and

illustrating the manner in which the coil spring cooperates with the same to force such end portions apart.

Fig. 6 is a face view of the male member of the door dovetail shown in phantom in Fig. 1.

As understood by those familiar with this art, door dovetails are used in preventing vertical movement of the free edge of a door in relation to the cooperating door frame and comprise essentially a male member and a female member. One ofthe members is secured to the free edge of the door and the other is secured to thecooperating door frame member, and are so positioned that when the door is closed the male member lits f into or cooperates with the female member and thereby prevents vertical movement of l the one in respect to the other.

Although it is immaterial in the present invention which member is secured to the door or to the door frame, it is conventional .practice to secure the male member to the edge of the door and the female member in the door frame'and this position of the members is shown in the accompanying drawing. The male member shown is of conventional design and comprises a base l0 and an outwardly projecting portion ll, the portion l1 being preferably tapered in the direction of the innor side of the ydoor so as to more easily enter the cooperating female member. Openings such as 12 are provided for the passage of screws or the like for the purpose of securing. the male member in position on the edge of the door.

The present invention deals particularly with the construction of the female member which is adapted to be secured in the edge of the door frame as indicated in Fig. 2. rI`his member, as indicated in Figs. 2 to 5 inclusive of the drawing, comprises a casing formed from sheet of metal to provide flange portions 13, a central recess 14 circular in section and bounded on the sides by the circular walls 15 and on the bottom by the bottom wall 16, it beingl open opposite the bot-tom wall 16. A portion of the circular side walls are cut out as indicated at 17 to provide an opening in such walls. Within the recess 14 is positioned a holding` member comprising` side portions 18 joined together at one end by the portion 19 and having outwardly extending portions 2O at the other end thereof. This member is positioned Within the recess 14 with the open end of the members 18 adjacent and in line with the portion cut out of the walls 15 at 17, the portions 2O being reversely bent in relation to the portions 18 and circular in formation to match the circular walls 15 of the recess 14 against which they slidably contact. The free ends of the portions 2O extend back to that portion of the recess 14 opposite the opening in the walls and into adjacent but spaced relationship, the extremities thereof being bent inwardly out of contact with the walls 15 as at 21 and being formed to provide a shoulder such as 22 (see Fig. 5). A. coil spring 23 is positioned between the end portions 21 and is held Within the recess un der compression between the shoulders 22. The side portions 18 are formedwith marginal flanges 24 in order to stillen the same longitudinally and for a purpose to be described later. The portion 19 and the portions 20 are relatively Ilexible and resilient. f

Positioned over the open end of the recess 14 and secured in contactingl relationship against the face of the flanged portions 13 by spot-weldingor other suitable means, is a face plate comprisirI the face portion 25, angularly bent edge portion 26, and marginal flange 27, the edge portion 26 abutting against the edge of the housing member andthe circular walls 15 at the point where the aforesaid opening is provided therein. An opening- 28 is formed in the edge portion 26 in line with the opening in the circular side walls 15 and with the open ends of members 18. the metal at the edge of the opening 28 being preferably struck in as at 29 and engaging the ends of the members 18 adjacent thereto in orw der to limit the amount which such ends of the members 18 may approach each other.

The face portion 25 is provided with an opening 30' which connects with the opening 28 and extends transversely across the face of the port-ion 25 centrally of the members 18. The

openings

28 and 29 are formed of sufficient width to permit the free passage of the projection 11 of the male member therebetween. The flanged portions 24 on the members 18 bear against the underside of the face portion 25 adjacent the opening 30 and act to hold the members 18 in proper operating position within the recess 14. Suitable openings such as 31 are provided through both the face portion 25 and the flange portions 13 for the passage of screws such as 32 for the purpose of securing the female member in the edge of the door frame 33.

he relation ofthe various parts are, of course, such that when the male member is not in engagement in the female member the spring-:23 forces the outer ends of members 18 towards each other to a distance less than the thickness of the projection 11 on the male member, the inwardly bent portions 29 on the edge portion 26 of the face plate limiting the amount which such ends may approach each other in order to constantly provide an openingbetween the members 18 of sufficient width to permit the projection 11 to be forced between the same.

rllhe operation of the device will be apparent from the above. Then the door 34 swings into engaging relationship with its corresponding door fra-me 33 the projection 11 of the male member of the dovetail enters the

openings

28 and 30 in the face plate of the female member and against the outer ends of the side portions 18 within the female member. The projection 11 forces the onter ends of the members 18 apart, the portions 2O sliding in the recess 14 against the circular walls 15 and compressing the spring` 23 to accommodate this movement, and the end portion 19 connecting the inner ends of the side porions 18 bending to also accommodate this movement. The spring 23 in tending to force the free ends 21 ofthe portions 2O apart, not only resists this movement due to being compressed but the same is also resisted by the friction between the portions 2O and the cir cular walls 15 which is set up by the spring in forcing the end portions 21 apart. t will be apparent that when the projection 11 has been forced between the side porti-ons 18 the same will .securely hold it against vertical movement with respect thereto. It will also be apparent that as soonas the door is opened, thus withdrawing the projection 11 from between the side portions 18, the side portions 18, portions 2O and spring 23 will return to the position shown in the drawings.

From the above it will be apparent that the device herein described is extremely simple in construction, may be formed by a few simple stamping operations, is economical to produce and includes no rubber members which may deteriorate solely because of ase- Cil Formal changes may be made in the specific embodiment of the invention described without departing from the spirit and substance of the broad invention, the scope of which is commensurate with the appended claims.

That I claim is:

1. In a device of the class described, a circularly shaped housing closed on one side, a member positioned within said housing comprising a pair of arcuate portions engaging the circular walls of said housing and a U- shaped portion joined at its ends to adjacent ends of said arcuate portions, springs urging the opposite ends of said arcuate portions apart, and a plate overlying and closing said housing provided with an opening in line with said U-shaped member.

2. A device of the class described, comprising a face plate provided with an opening therethrough, a back plate secured to said face plate and providing a circular chamber equally disposed on either side of said opening, a member within said chamber comprising a pair of arcuate portions slidably engaging the walls of said chamber and connected at one end by a U-shaped portion lying in line with said opening, and a spring cooperating with the other ends or' said arcuate parts constantly urging said ends apart.

3. In a device of the class described, an angle plate, two adjacent faces or' said plate having a continuous opening therethrough, a casing secured to the rear face of said plate overlying said opening and providing a circularly walled chamber, a member within said Ichamber comprising a pair or" arcuate portions slidably engaging said walls and a U- shaped portion connecting said arcuate portions and positioned in line with said opening, and a spring for forcing the free ends of said arcuate portions apart.

4. In a device of the class described, a casing providing a generally circular recess, a member lying within said recess comprising a pair of` spaced relatively stiff portions joined at adjacent ends by a yieldable portion` arcuate portions each joined at one end to the other ends of said stiff portions an-d extending outwardly therefrom in contact with the walls of said recess, spring means for urging the other ends of said arcuate portions apart, the walls of said recess being provided with an opening in line with the space between said stili portions and at the unconnected ends thereof, and a plate overlying said casing and covering said recess, said plate being provided with a slot there- Vthrough in line with the space between said stilll portions and matching said opening.

5. In a device of the class described, a cas-- ing provided with a recess having a curved wall, a member lying within said recess comprising a U-shaped portion provided at its ends with outwardly extending free curved portions slidably engaging said wall, the

sides of said U-shaped portion being angular in section and the remainder of said member being flat in section, spring means for urging the free ends of said curved portions apart, said casing being provided with a slot in line with the open end of said U-shape-d portion, and a plate member overlying said casing and closing said recess, said plate member being provided with an opening in line with said lJ-shaped portion and said slot.

6. In a device of the class described, a casing provided with a recess having a curved wall, a member lying within said recess comprising a resilient U-shaped portion having outwardly extending reversely bent portions resiliently connected thereto in sliding contact with said wall, resilient means for urging the free ends of said member outwardly, said casing being provided with a slot in line with the open end of said U-shaped portion, tongues on said casing engaging the ends of said U-shaped portion and limiting the inward movement thereof, and a plate member overlying said recess and secured to said casing, said plate member being provided with an opening in line with said U-shaped portion and said slot.

7. In a -device of the class described, a casing provided with a circular recess and an outwardly extending marginal flange portion, a generally W-shaped member lying within said recess with the outer portions thereof curved and in frictional contact with the walls of said casing, the free ends of said member lying in generally opposed and adjacent relationship, spring means for urging said free ends of said member apart, said casing being provided with an opening adjacent the bottom of said W, and a plate overlying said casing and secured to said flanges, said plate being provided with an opening matching said opening in said casing and extending centrally over said casing.

8. In a device or' the class described, a casing having a circularly shaped recess therein, a member within said recess comprising a pair of arcuate portions and a U-shaped intermediate portion disposed between said arcuate portions and operatively connected thereto, said arcuate portions litting and slidably engaging the walls of said recess, and spring means constantly urging said arcuate portions into rictional contact with said walls and the opposite sides of said U-shaped portionv together.

FRED W. BEYER.