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Publication numberUS3334933 A
Publication typeGrant
Publication dateAug 8, 1967
Filing dateAug 9, 1965
Priority dateAug 9, 1965
Publication numberUS 3334933 A, US 3334933A, US-A-3334933, US3334933 A, US3334933A
InventorsEhlers Ervin W
Original AssigneeEhlers Ervin W
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Locking device
US 3334933 A
Abstract  available in
Images(2)
Previous page
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Claims  available in
Description  (OCR text may contain errors)

E.'W. EHI-ERS LOQKING DEVICE Aug. 8, 1967 2 Sheets-Sheet l Filed Aug.

FIG. 2

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ATTORNEYS BY M E. W. EHLERS LOCKING DEVICE Aug. s, 1967r 2 Sheets-Sheet 2 Filed Aug. 9, 1965 FIG. 7

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INVENTOIL` ERVIN w. EHLERs ml. r

BY MAM/#w ATTORNEYS United States Patent 3,334,933 LOCKING DEVICE Ervin W. Ehlers, Rte. 1, BOX 160, Austin, Minn. 55912 Filed Aug. 9, 1965, Ser. No. 478,252 Claims. (Cl. 292-148) My invention relates to locking devices and more particularly to an improved locking device of the slide bolt type. Locking devices which employ a sliding bolt and are sometimes known as dead-bolt locks have taken a variety of form and complexity. The present invention is directed to a lock of this type utilizing a relatively small padlock as the locking mechanism, provide a locking device which is rugged in construction and relatively tamper proof in that the padlock is substantially enclosed at all times. In the present invention, the shackle of the small padlock encircles the -bolt and the position of the body of the padlock relative to the surrounding structure and the bolt will provide a positive locking structure for the sliding bolt type lock. In the improved locking device, the key operated padlock is positioned within the housing of the lock at all times as is the bolt structure so as not to become separated therefrom and lost or tampered with. Thus the improved locking Adevice permits the use of a key operated padlock which cooperates with the sliding bolt in the fully extended or fully retracted position and engagement of the padlock with the sliding bolt permits locking of the locking device.

It is therefore an object of this invention to provide an improved locking device of the sliding bolt type.

Another object of this invention is to provide a locking device of this type in which a small key operated padlock effectively positions and locks the bolt, and the padlock is completely enclosed to prevent tampering therewith.

A further object of this invention is to provide a locking device in which the bolt and the padlock cannot be removed without disassembly of the locking device to prevent loss or tampering with parts.

It is also an object of this invention to provide in a locking device a simplified design which is easily manufactured, installed and maintained.

It is another object of this invention to provide an improved locking device in which the sliding bolt and the small key operated lock are positioned so as not to be exposed beyond the surface of a protecting body upon Which they are mounted.

A further object of this invention is to provide in a lock of this type an arrangement in which the locking device may be mounted on the inside of an enclosure or forming a part of an enclosure with access means for operating the lock and a manually operated mechanism for sliding the bolt from without theenclosuref These and other objects of this invention will become apparent from a reading of the attached description tol gether with the drawings wherein:

FIGURE 1 is a plan view of the improved locking device with parts in section showing the bolt in a retracted position;

FIGURE 2 is a sectional view of the locking device of FIGURE l taken along the lines 2-2 therein;

FIGURE 3 is a plan view of the locking device of FIGURE 1 with parts in section showing the bolt extended;

FIGURE 4 is a sectional view of the locking device of FIGURE 3 taken along the lines 4 4 therein;

FIGURE 5 is a sectional view of the locking device of FIGURE 3 taken along the lines 5--5 therein;

FIGURE 6 is a sectional view of the locking device of FIGURE 3 taken along the lines 6 6 therein;

FIGURE 7 is a plan View of an alternate embodiment of the improved locking device;

3,334,933 Patented Aug. .8, .1967

ice

FIGURE 8 is a sectional view of the improved locking device of FIGURE 7 taken along the lines 8-8 therein; and

FIGURE 9 is a back view of the embodiment of the locking device shown in FIGURE 7.

My improved locking device is shown in plan view in FIGURES 1 and 3, in one of several modes of installation. Thus the improved locking device, which is shown generally at 10, is comprised of a body 12 which is adapted to be mounted on a support structure 15 and cooperate with a keeper member 20 mounted on a second support structure 22 such that a bolt mechanism 25 in body 12 may be moved to an extended position and co operate with the keeper in a conventional manner. The support structures or surfaces 22 and 15 may be wall and door structures disposed in adjacent relationship or any other relatively movable surfaces. In the normal installation position, the locking device is generally located in a horizontal plane to cooperate with an aperture 26 in the keeper member such that a bolt portion 28 of the bolt mechanism 25 may slide into and out of confining relation therewith. It will be recognized, however, that this mounting relationship may vary in accord with the usage of the locking device.

The body 12 is shown in FIGURES 1-6 as an elongated member which is channel shaped or U-shaped in cross-section and in the embodiment shown is partially open on the lower extremity or bottom when it is mounted on a vertical surface and in a horizontal direction. The body 12 has an elongated passage therethrough which is defined by a cylindrical bolt guiding member 30 which is suitably attached to the channel or U-shaped body member 12 at the upper interior surface thereof through means ysuch as welding, as indicated at 32. While we have shown this cylindrical bolt portion 28 and a similarly shaped guide member 30 for the bolt, it will be recognized that this structure may take any desired cross-section. The cylindrical guide member 30 is aided in its support within the body 12 by a transversely extending cylin drical member 35 attached between the sides of the body or channel member 12 through suitable means such as welding 36, the cylindrical member 35 having an aperture therethrough which provides for mounting of the body 12 by a bolt 48 extending therethrough. The remaining portion of the longitudinal passage through the body 12 is generally rectangular in cross-section and is defined by a pair of angle members 45 and 46 positioned between the sides of the body 12 and suitably secured thereto through means such as welding (not shown). The angle members 45, 46 are so positioned in the body 12 that they define with the sides and top or closed portion thereof a generally rectangular passage such as is shown in FIG- URES 2 and 5 which extend part way through the body 12 and terminate in the cylindrical passage defined by the cylindrical member 30. The members 45, 46 are also spaced from one another to provide a transversely extending passage 50 which extends from the bottom of the body normal to the first named rectangular passage and in communication therewith.

Bolt 25 which is positioned in the passage through the elongated body 12 is an elongated structure adapted to be slidably mounted therein and is comprised of the cylindrical bolt portion 28 adapted to fit into and slide within the cylindrical member 30 between extended and retracted positions. At the extremity of the cylindrical bolt portion 28 a guide flange 52 is mounted and secured thereto through means Isuch as Welding (not shown), the guide flange member being generally rectangular in crosssection to fit into the rectangular structure defined by the members 45, 46 within the body 12 and having a leg portion which will aid in guiding the bolt mechanism 25 in the passage. Member 52 may take varying forms and is preferably constructed from an angle type member whose length conforms with the generally rectangular cross-section of the passage. Bolt mechanism 25 also mounts a shoulder ilange 55 along its extent which shoulder ange is restricted in its width dimension to the diametrical dimension of the bolt portion 28 and in length such as to slide in the rectangular portion of the passage through the elongated body. Thus as the bolt moves translationally from extended to retracted positions, the shoulder flange 55 will clear the surfaces of the angle members 45, 46 defining the rectangular passage. The rectangular guide flange 52 also mounts a pin member 86 which is attached thereto through suitable means such as welding (not shown) with the pin extending out of the rectangular passage and being adapted to -be manually engaged for positioning the bolt mechanism between extended and retracted positions. In the extended position of the bolt mechanism, the shoulder flange 55 on the cylindrical bolt portion 28 will be advanced to engage the edge of the cylindrical guide structure 30. In this position, the shoulder flange 55 will have its opposite edge aligned with the edge of the passage 50 defined by the flange members 45, 46 for purposes to be later noted. Further, in this extended position, the pin member 86 will have a portion extending beyond the body 12 such that it may be manually or otherwise engaged. The guide flange 52 at the end of the bolt mechanism 25 in the extended position, will be clear of the opposite edge surface of the passage 50.

The transversely extending passage 50 in the elongated body 12 of the locking device mounts a conventional key operated padlock, indicated generally at 65, as comprising a body 66 and a U-shaped shackle 67 which cooperate in a conventional manner. The passage 50 and the body 66 of the padlock are of such dimension that the body of the padlock snugly ts therein and is slidable within the passage to permit locking and unlocking of the padlock. Shackle 67 is positioned around the cylindrical portion 28 of the bolt mechanism and is of such dimension that the body of the lock is substantially enclosed by the body 12 in an unlocked position. Further, in this position, the bolt may be slidably moved between extended and retracted position and the shoulder ange 55 thereon will slide within the shackle. Body 12, as shown in FIGURES 1-4 and 6, has an indentation 70 on the inner surface of the top of the body into which the curved extremity of the shackle extends for the purpose of positioning the shackle Within the body against translational movement. This indentation or groove on the interior surface of the body 12 will insure that the shackle does not pivot within the body and hence bind on the bolt mechanism 25 as the bolt is moved relative thereto. In place of the indentation of 70 in the body 12, suitable ridge members (not shown) may be provided for this purpose.

The end of the extremity of the elongated body member which houses the guide ange 52 of the bolt mechanism 25 and the pin member 86 connected thereto is enclosed by a cap member 80 which tits over this extremity of the body and encloses the open end of the passage therethrough. The cap member 80 encloses all but the rear surface of the body 12 adjacent the surface upon which the body is mounted and includes a pair of outwardly extending flanges 82 with apertures therein through which mounting bolts 85 extend to attach the cap member and hence this extremity of the body to the surface 15 upon which the locking device is to be mounted. The mounting bolts 85 cooperate with the mounting bolt 40 extending through the cylindrical member 35 in the elongated body to positively position the locking device on the surface to which it is mounted on. The capy 80 further prevents removal of the bolt mechanism 25 from the passage in a body 12. Cap 80 has an aperture 84 therein through which the pin member 86 extends such that the pin member may be moved to position the bolt mechanism 25 between extended and retracted positions. To

move the bolt mechanism, the padlock 65 must be unlocked such that the shackle is moved to an extended position from the lock body 66 such that the shoulder flange 55 on the bolt portion 28 may slide within the contines of the shackle as the bolt mechanism is guided by the guide flange 52 in the rectangular portion of the passage. The padlock 65 can be operated Iby pu-shing to a closed position only when the bolt is extended so that the shoulder ange 55 is abutting the cylindrical guide structure 30 for the bolt portion 28 and its opposite edge is clear of the transversely extending passage 5d. As the padlock is moved to a closed position, body 66 will be raised in the transversely extending passage to project into the rectangular `portion of the elongated passage to abut against the opposite edge of the shoulder flange 55. Since the major extent of the body 66 of the padlock is still confined in the passage 50, it will prevent movement of the bolt mechanism toward the retracted position thus holding the locking device in a locked position. The positioning of the guide ange 52 may be varied but it must be spaced a sufficient distance from the shoulder llange 55 on the bolt so as to provide a clear passage for the body 66 of the lock as it is raised to the locked position. The groove provided by the raised portion 70 in the elongated body will insure that the shackle is positively positioned to further retain the bolt in the extended position.

The improved locking device is tamper proof in that the body of the lock is completely enclosed at all times so as not to be subject to damage by external blows. Further, the shackle of the lock is completely protected and the portion by which the bolt mechanism is held by the shackle and the body of the lock is similarly enclosed. The cap covering the open extremity prevents the bolt mechanism from being removed when the locking device is in the unlocked position or locked position to further protect the structure. The materials employed in the elongated body 12, the end cap 80 and the bolt 25 are of sufficient rugged metallic material to withstand forces of tampering. The improved locking device is simple in design and permits the use of a conventional padlock in a location which prevents exposure of the same. Similarly in the unlocked and locked position, the padlock is continually maintained within the confines of the locking device so that it will not become lost or tampered with.

An alternate embodiment of the improved locking device is shown in FIGURES 7, 8 and 9. In the before mentioned embodiment, the improved locking device was comprised of an elongated body which housed the sliding bolt and key operated lock in such a manner that the bolt and lock were not exposed so as to prevent tampering of the same. The bolt was slidably mounted in a guide passage through the body and the shackle of the lock encircled the bolt with the body of the lock cooperating with a shoulder on the bolt to secure the same in a locked position. In the alternate embodiment, the elongated protective body takes the form of a general platelike member 102 of a metallic material which is adapted to be mounted on the movable part of an enclosure, such as a door on the inside surface thereof, or as a part of the door, and depending upon the physical size of the structure, as the door itself. Thus as will be seen in FIGURE 7, the movable part of the enclosure, such as a door indicated at 105, mounts the platelike member or portion 102 of the body in a suitable opening therein such that only an aperture 106 of a transversely extending passage 122 to be later defined and a slot 167 appear in the surface of the platelike member. On the opposite surface, the platelike member 102 mounts a pair of spaced angle support members 110, 111 which form a portion of the transverse passage 122 and aid in the mounting for a bolt, indicated generally at 115. Thus, as will be seen in FIGURE 8, the channel members or angle members 110, 111 are positioned in alignment with a cylindrical guide structure 118 at one end of the plate 102 which guides the straight portion of the bolt 115, as will be hereinafter described.

Also positioned between the angle members 110, 111 are a pair of transversely extending angle plates 120, 121 which form with the angle members 110, 111 the transversely extending recess 122 Whose extremity 106 is exposed on the face of the plate 102. The extent of passage 122 is generally normal to the passage formed by the cylindrical guide structure 118. The outer edges ofthe plate 102 may include mounting flanges 125 extending along the edge of the same which aid in mounting it on the movable portion of the enclosure or to form flanged edges for the movable portion of the enclosure in the event that the elongated body 102 forms the entire enclosure.

The sliding bolt 115 of this embodiment of the locking device is bent or offset along its extent, such as 130 in FIGURE 8 such that a portion is raised from the surface of the plate 102 to extend over the transversely extending passage 122 and cooperate With the U-shaped shackle 67 of the key operated lock whose body 66 is positioned in the transversely extending passage for slidable movement therein. The shackle encircles the extremity of the bolt remote from the cylindrical guide member 118 and it in turn is restrained against rotation by means of a U-shaped bracket member 135 which is attached to the angle members 110, 111 at its extremities. Thus as Will be seen in FIGURE 9, the U-shaped bracket member has transversely extending flange portions 136 at its extremities which attach to the iiange members 110, 111 through suitable bolt means indicated at 137. The saddle or U-shaped bracket 135 engages the top of the shackle to prevent pivotal or rotative movement of the same in its body. It also serves to define the end of the transversely extending passage 122 and a portion of the guide structure for the bolt 115. Bolt 115 beyond the bent or oifset portion 130 mounts a shoulder ange 138 which is adapted to slide through the shackle clearing the body of the lock when the lock is in its open position. The extremity ofthe bolt 115 opposite that portion which is adapted to slide into and cooperate with a keeper mounts a transversely extending pin 140 Which extends toward the platelike member 102 and through the slot 107 therein such that a portion of the same is exposed beyond the surface of the plate 102 for manual engagement and movement of the bolt to which it is attached. Pin 140 in extending through the slot 107 aids in the guiding of the bolt 115 such as to prevent rotation of the same. Similarly, the bracket 135 surrounding the bolt and encircling the shackle of the lock insures that the bolt will Ibe guided through the cylindrical member 118 attached to the platelike member 102 and into and out of the keeper. Further the shoulder means or flange 138 on the bolt is of such dimension and is so positioned as to slide through the shackle 67 of the lock and clearing the body part 66 of the same when the lock is in an open position. When the lock is in a locked position, the body part will be raised inasmuch as the shackle is fixed against movement by virtue of its association with the bolt and the bracket 135. In the raised position of the body part 66 of the lock, the shoulder portion or flange 138 on the bolt abuts the top of the body which is guided in the recess and retained therein by means of the angle plates 120, 121 and the angle members 110, 111.

Thus the bolt will be restrained against movement to the left Ias viewed in FIGURE 8 to prevent sliding the straight portion of the bolt in the cylindrical guide member 118 when the padlock is in a locked position and the shoulder portion is to the right of the body of the lock. With the padlock in an unlocked position, the body part 66 is lowered in the recess 122 such that the bolt may be slid back and forth along the extent of the plate and guided by the cylindrical guide member 118 and the pin 140 in the slot 107 with the shoulder ange 6 138 sliding through the shackle of the lock to permit the bolt to be removed from the keeper and be positioned entirely behind the protection by the plate 102. The slot 107 in the plate 102 is of sucient dimension to permit such movement.

In the alternate embodiment of the improved locking device, the padlock and bolt are again protected against tampering by being substantially enclosed, inasmuch as the plate 102 is mounted with the bolt and lock portions projecting into the enclosure with which they are associated. Lock 66 may be operated by insertion of the key `for the same through the aperture 106 `and into the recess 122 to engage the body of the lock and the keyhole therein. Whenever it is desired to place the locking device in a llocked position, the padlock is unlocked and the bolt is moved to the right as viewed in FIGURE 8 to slide the bolt portion beyond the contines of the cylindrical guide member 118 and into an associated keeper. Such movement is compiled by manually grasping the exposed end of the pin 140 and moving it in the slot 107 on the exposed surface of the plate 102. With the bolt in the extended position or a locked position for the locking device in general, the padlock is closed by physically moving the body part 66 of the same further into the recess 122 to cause the shackle 67 to lock with the body part 66. In this position, the shoulder flange 138 on the bolt is to the right of the body part 66 as shown in FIGURES 8 and 9 and the exposed portion of the bolt extends into the keeper. The bolt is prevented from moving further to the right by the limitations of the keeper andthe bent portion engaging the cylindrical guide member 118. To unlock this embodiment of the improved locking device, the key operated padlock will be placed in an un'locked position freeing the bolt for movement by moving the body part 66 of the padlock toward the exposed surface of the body or plate member 102. This will allow the shoulder flanges 138 to clear the body part 66 of the lock and permit movement of the bolt 115 by manually engaging the exposed portion of the pin 140 attached thereto and sliding it in the slot 107 for the same.

It will be recognized that the improved Ilocking device may take varying forms internally to provide the general features outlined above. Thus the structure may be cast as an integral unit, the shape of the bolt mechanism may take on the cross-section of a polygon to eliminate or otherwise modify the guiding structure for the same. Within the scope of the present invention, the body `of the lock will provide the means in cooperation with the bolt for insuring the locked or secured relationship and as such must be in proximity to the bolt mechanism with the lock in a closed position While permitting movement of the bolt mechanism in the unlocked position.

Therefore in considering this invention it should be remembered that the present disclosure is intended to be illustratively only and the scope of the invention should be determined by the appended claims.

What is claimed is:

1. A locking device comprising, an elongated body adapted to be mounted on a support, said body having a longitudinal passage extending therethrough a portion of which is a cylindrical bolt opening and the rest being generally rectangular in form, a transversely extending passage terminating in the rectangular portion of the longitudinal passage in the elongated body, an elongated bolt having a cylindrical bolt portion slidably mounted in the cylindrical bolt opening of the longitudinal passage and a guide flange slidably positioned in the rectangular portion of the longitudinal passage, said elongated bolt having a shoulder flange on the bolt portion, a key operated lock having a U-shaped shackle and a body -part iitted into the transversely extending passage in the elongated body With the shackle encircling the bolt portion of the elongated bolt, the elongated bolt being slidable within the longitudinal passage in the elongated body between a position in which the bolt portion extends out of the cylindrical bolt opening and is adapted .to t into a keeper to a position in which the bolt portion is disposed entirely within the longitudinal passage, and said lock being opened and closed within the transversely extending passage of the elongate-d body and when closed with the bolt extended out of the cylindrical bolt opening causing the body of the lock to be positioned between the shoulder flange and the guide flange of the elongated bolt with a portion of the lock body remaining in the transversely extending passage to prevent sliding movement of the bolt within the elongated body.

2. The locking device of claim 1 in which the key operated lock is positioned entirely within the transversely extending passage of the elongated body for conditions of open and closed and when open permitting the bolt portion of the elongated bolt with the shoulder flange thereon to slide within the shackle of the key operated lock between said positions.

3. The locking device of claim 2 and including a pin connected to the guide ange on the elongated bolt and extending out of the elongated body yto be manually engaged for moving the elongated bolt within the passage of the elongated body.

4. The locking device of claim 3 and including a cap closure positioned over the end of the elongated body and closing one end of the longitudinal passage therein adjacent the rectangular portion of the longitudinal passage and including aperture means through which the pin extends.

5. The locking device of claim 4 and including mounting means positioned in part in said cap closure and in part in said elongated body for mounting the body on a support.

6. A locking device comprising, an elongated bodyadapted to be mounted on a support, said body having a longitudinal passage extending therethrough, a transversely extending passage positioned in said body and intersecting the longitudinal passage, an elongated bolt slidably mounted in said longitudinal passage and including means for guiding said bolt within said longitudinal passage, said elongated bolt being adapted to be moved between positions in which the bolt extends beyond the elongated body and is adapted to fit into a keeper and to a position in which the elongated bolt is positioned wholly within the elongated body, a key operated lock having a U-shaped shackle and a body part fitted into the transversely extending passage in the body with the shackle encircling the elongated bolt, and shoulder means positioned on the elongated bolt and adapted to be engaged by the body part of the lock in the locked position as said body part moves partially into the longitudinal passage of the body part to prevent movement of the bolt relative to the elongated body.

7. The locking device of claim 6 in which the transversely extending passage in the elongated body is shaped to slidably mount the body part of the key operated lock and is substantially of the same cross-section as the body part of the lock.

8. The locking device of claim 6 and including means connected to the elongated bolt and extending out of the elongated body for manually sliding the bolt within the body between the various positions of the bolt.

9. The locking device of claim 8 in which the shackle of the key operated lock continuously encircles the elongated bolt permitting slidable movement of the elongated bolt in the open position and preventing relative movement between the bolt and the elongated body when the bolt is in a position extending out of the longitudinal passage and the lock is closed.

lil. A locking device comprising, an elongated body adapted to be mounted on a support, said body having a longitudinal passage therein, a transversely extending passage positioned in the body with its extent normal to the extent of the longitudinal passage, an elongated bolt slidably mounted in said longitudinal passage and including means for guiding said bolt. Within said longitudinal passage, said elongated bolt being adapted to be moved between positions in which the bolt extends beyond the elongated body and is adapted to lit into a keeper and to a position in which the elongated bolt is positioned wholly protected by the elongated body, a key operated lock having a U-shaped shackle and a body part fitted into the transversely extending passage in the body with the shackle encircling the elongated bolt, and shoulder means positioned on the elongated bolt and adapted to be engaged by the body part of the lock in the locked position to prevent movement of the bolt relative to the elongated body.

1l. rl.`he locking device of claim 10 in which the means for guiding the elongated bolt extends through an aperture in the elongated body for manually sliding the bolt between said positions.

12. The locking device of claim 11 in which the elongated body includes a platelike member with a longitudinal passage for the bolt positioned to one side of the body and in which the platelike member is adapted to be positioned on movable portion of an enclosure such that the bolt is positioned within the enclosure when the movable portion completes the enclosure.

13. The locking device of claim 12 in which the transversely extending passage in the body in which the key operated lock is positioned is open at one extremity on the surface of the platelike member.

14. The locking device of claim 13 in which the means for guiding the bolt in the longitudinal passage includes a pin extending from the bolt and through a slot in the platelike member to be manually engaged for positioning the bolt in said positions.

15. The locking device of claim 14 in which the means for guiding the bolt further includes a bracket attached to the elongated body and encircling the bolt.

References Cited UNITED STATES PATENTS 1,490,988 4/1924 Soref 70-11 2,482,341 9/1949 Holmsten 292--148 2,912,845 11/1959 Mordovanecy 70-129 X 2,974,987 3/1961 OBrien 292-148 BOBBY R. GAY, Primary Examiner.

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Classifications
U.S. Classification292/148, 70/129
International ClassificationE05C1/00, E05C1/04, E05B67/38, E05B67/00
Cooperative ClassificationE05B67/383, E05C1/04
European ClassificationE05C1/04