US2593570A

US2593570A - Hasp

Info

Publication number: US2593570A
Authority: US
Inventors: William O Kirkpatrick
Original assignee: ER Wagner Manufacturing Co
Current assignee: ER Wagner Manufacturing Co
Priority date: 1950-09-12
Filing date: 1950-09-12
Publication date: 1952-04-22
Anticipated expiration: 1969-04-22

Description

April 1952 w. o. KIRKPATRICK 2,593,570

HASP

Filed Sept. 12, 1950 I INVENTOR. ll/zile vn 469i nae ATTOE/VEX Patented Apr. 22, 1952 UNITED STATES PATENT OFFICE HASP William 0. Kirkpatrick, Milwaukee, Wis., assignor to E. R. .Wagner Manufacturing company, Milwaukee; Wis a corporation of Wisconsin & Application September 12, 1950, Serial'No'. 184,402

provide a hasp which may be inexpensively manufactured; isattra'ctive in appearance, durable, and easilyapplied' to ther'eceptacle. r

This object is obtained-- by providing a hasp plate, portionsof the topwall of which are formed downwardly to provide penetrating prongs as well as simple and effective'holding means for the hasp spring. An over-center actingihasp spring snaps into place on the underside of the hasp plate and its legs straddle thepenetrating prongs, one of which has notches with which such legs engage to hold the spring in place and provide a fulcrum thereforl A hasp is pivoted to said plate and has a camming lug against which said hasp spring rests. This construction is inexpensive because: the plate penetrating prong'and spring holder are made in one-operation from a single sheetof rrietal; the hasp assembles easily to the plate; and a' single operation puts the spring in place so that it can operate the hasp as well as hold it assembled.

The novel features which are considered characteristic of the invention are set forth with particularity in the ap ended. claims. Theinvention itself, however, both as' to its organization and its method of operation, together with additional objects and advantages thereof, will best be understood from the following description of aspecific embodiment whenyread in connection with the accompanying drawings, in which:

Fig. 1 is a top plan view showing the/hasp constructed in accordance with the present invention, the hasp. being in the closed or latched position;

2 is a sectional view taken on line 2 '-2 of Fig. 1;

' Fig. 3 is a bottom plan viewof the hasp viewed in Fig. 1;

Fig. 4 is a sectional view taken on line 4-4 of Fig. l;

Fig/5 is a sectional view taken on line 5-5 of Fig. 1;

Fig. 6 is a fragmentary plan view of the approximate layout of the penetrating prong development;

Fig. 7 is a fragmentary sectional view showing 2 the relation of thehasp and hasp'spring when the hasp is partly open; and

Fig. 8 is a fragmentary sectional view showing therelation of the hasp and hasp spring when the hasp'is fully open.

A hasp of the generalcharacter illustrated in the drawings is disclosed in thepatent to Berthold' R- 'Th ele ,314,180 owned byth'e assignee hereof. Reference should be had to such patent for the details of construction of such of the parts herein niehtionedwhich are of siinilar design.

They hasp or clasp comprises two principal parts. one o'fthese, thekjeeper' I6, is mounted on one section of the receptacle and the other, the hasp !4, is mounted on another section of the receptacle by means of a hasp plate 12. As the sections of"thetreceptacle are brought together the hasp and the keeper come into alinement and interlocking engagement to hold such'sec tions together.

The keeper ID issimilar tothat described in the patent and has the usual boss I! and toe l3. The-boss H is engaged by the hasp l4 and the toe l'3'a1ines the keeper with the hasp plate in the closedposition; The hasp I4 is pivoted to a has'p plate 12 and held in such pivotal relationship by a hasp spring Mlhaving an over-center actionto urge the hasp l4 into keeper-locking position or into fully open position.

One of the features of the hasp plate i2 is-that the top-|6- has part of its central portion-cut out asshown in Fig.- 6 leaving sections thereof hav--. ing the shapes of penetrating prongs indicatedat 22 and 24." These sections are bent downwardly from the plane of the top I6 to form the pens trating prongs by which the hasp plate l2 is se curedto a receptacle. Theprong22, adjacent its juncture with the top l6, has a pair of spaced notches 26 adapted to receive and hold the legs of the haspspring 49 and thereby provide a fulcrum for such spring. Near the prong 24, the top [6 is displaced upwardly to provide transversely alined bearing sockets 28 adapted to cooperate with trunnions 30 on the hasp 14. In

order to strengthen the hasp plate [2 and to space the top Hi from the surface Of the receptacle, the plate is provided with a marginal depending flange Ill. The height of the flange I8 is sufiicient to provide adequate space for the operation of the hasp l4 and hasp spring 40 without interfering with the receptacle.

The hasp M has a substantially imperforate body provided with integrally formed trunnions 30 at one end. These trunnions are shaped to nest within the bearing sockets 28 to form pivotal association between the hasp l4 and the hasp plate l2. Adjacent the trunnions the hasp M has a camming lug 32 which projects downwardly and rearwardly with respect to the body of the hasp 14 to cooperatively engage the legs of the hasp spring 40. As is shown in Fig. 3 the lug 32 may be cut away, as indicated at 34, to provide clearance for the penetrating prong 24 when the hasp I4 is in the locked position of Fig. 2. The hasp I4 is provided with a customary finger-piece 38 by which it may be manually lifted from locked position or by which it may be temporarily cammed over the boss H as the keeper ID and hasp plate l2 are brought together.

One of the novel characteristics of the hasp l4 resides in the provision of a boss-locking edge 38. To form such edge the substantially imperforate body of the hasp has a small section cut therefrom at the juncture of the body and the finger-piece. The edge thus formed is relatively sharp and engages the side of the boss II with enough friction to prevent the hasp M from being accidentally unlocked. Thus the appearance of the hasp created by the imperforate body thereof is not affected and still the advantage of a good frictional grip between hasp and keeper 7 is attained.

Another feature of this invention is the manner in which the hasp spring 40 is secured to the hasp plate l2 to operatively engage the camming lug 32 and hold the hasp M in pivotal association with such plate. The spring 46 is made of tempered spring wire formed in a general U shape having legs connected by a bridge portion. The legs of the spring 49 straddle both of the penetrating prongs 22 and 24 while the bridge rests against the under side of the top I6 between the marginal flange i8 and a small depending projection 42. The legs are inherently sprung inwardly enough so that they are slightly spread apart by the edges of prong 22 as the spring is forced upwardly thereof. Hence the legs snap into the notches 26 and are held therein with sufficient force to prevent the spring from being dislodged under normal operating conditions. The spring is held against movement longitudinally of the plate l2 by the engagement of the bridge by the flange I8 and projection 42. The legs are bent upwardly as indicated in Fig. 2 so that when the bridge rests against the top [6 and the intermediate parts of the legs are engaged in the notches 26 the end portions of the legs will be resiliently urged upwardly against the camming lug 32 with sufficient force to hold the trunnions 32 in pivotal relationship with the bearing sockets 28 and urge the hasp I4 to either locked or unlocked position.

Although only one embodiment of the invention is shown and described herein, it will be 4 understood that this application is intended to cover such changes or modifications as come within the spirit of the invention or scope of the following claims.

I claim:

1. A hasp comprising a hasp plate having a top with an opening therein, a spring holding member depending from an edge of said opening and having notches in the opposite edges thereof, a hasp pivoted to said plate and having a portion extending through said opening to provide a camming lug below said top, and a spring having spaced legs which straddle said member and are inherently biased into said notches to form a fulcrum connection between said member and spring whereby said spring is held in place by said member with its legs in operative engagement with said lug.

2. A hasp as claimed in claim 1 in which said spring has a bridge and said plate has a downward projection engageable with said bridge to aid in holding said spring in place.

3. A hasp as claimed in claim 1 in which said holding member extends below said notches and has its lower end, pointed whereby it functions also as a fastening prong.

4. In a hasp, a hasp plate having a top with an opening therein spaced from the sides thereof, penetrating prongs depending from said top at opposite edges of said opening, a hasp pivotally related with said top and extending over said opening, said hasp having a portion extending within said opening to provide a camming lug, a spring having a bridge and legs, said legs straddling said prongs, and notches in the opposite edges of one of said prongs into which said legs are spring-biased to provide one fulcrum point therefor, said bridge being in contact with said top to provide a second fulcrum for said legs, the free ends of saidlegs being in resilient engagement with said camming lug whereby said hasp is urged to either open position or locked position and maintained in pivotal relationship with said top.

5. A hasp as claimed in claim 4 in which said top has a marginal flange and a downward projection spaced therefrom between which said bridge is engaged to hold said spring in proper place.

WILLIAM O. KIRKPATRICK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,279,757 Magnuson Apr. 14, 1942 2,314,180 Thiele Mar. 16, 1943