US2919945A

US2919945A - Fastening devices for doors and the like

Info

Publication number: US2919945A
Application number: US664050A
Authority: US
Inventors: Tannen Alfred
Original assignee: Individual
Current assignee: Individual
Priority date: 1956-06-12
Filing date: 1957-06-06
Publication date: 1960-01-05
Anticipated expiration: 1977-01-05

Description

Jan. 5, 1960 A. TANNEN 2,919,945

FASTENING DEVICES FOR DOORS AND THE LIKE Filed June 6, 1957 2 Sheets-Sheet 1 p INVENTOR- Al FKFD FA/V/Vf/v W M M W W ATTORNEYS.

Jan. 5, 1960 A TANNEN FASTENING navxcszs FOR DOORS AND THE LIKE 2 Sheets-Sheet 2 Filed June 6, 1957 ATTORNEYS United States Patent v."

FASTENING DEVICES FOR DOORS AND v THE LIKE This invention relates to fastening devices for doors and the like, e.g. casement windows (all hereinafter inclusively called doors)vfor'preventing such doors being opened wider than a predetermined amount which is insufi'icient to permit the passage of a person through the doorway and which are releasable from the inside of the doorway in order to permit full opening of the door. Such fastening devices are typified by the well known chain which has been in use for many years.

An object of the present invention is to provide an improved fastening device of this general type, and in which the said device is adapted to co-operate with the key I actuated lock normally provided with a door whereby the fastening device is normally in the operative condition to limit openingrof the door when the door is shut but when the proper key is inserted in the lock in thenormal manner outside the door to unlock and open the door, the fastening device is actuated to free the door for complete opening, and, upon re-closing the door, the fastening device will return to its operative position to function as a stop against opening beyond the aforesaid predetermined amount.

A furtherobject of the present invention is to provide as the device which limits the opening of the door a slidable bolt adapted to be carried by the door and-which normaly engages atone end in a guideway provided in an arm adapted to be pivotally connected at one end to the jamb post of the door so that the said end of the bolt will slide along the guideway until it abuts against a terminal part of the guideway near the free end of the arm to prevent further opening of the door, and in which when it is desired to free the door for complete opening the bolt may be pulled by a person on the inside of the door away from the arm to disengage the said end of the bolt from thearm, and also so to connect the bolt to the normal lock of the door that when a person with the proper key unlocksthe lock, such unlocking operation I will also be transmitted to said bolt to disengage it from saidarm. j A still further object of the present invention is to provide means which will safeguard against unauthorised manipulation of the said'bolt away from said arm by a person from outside the door when the door is secured only slightly open by the interengaging bolt and arm, and for which object the head of the bolt is enlarged and the said guide is a groove which is undercut for the major portion of its length whereby such disengagement is positively prevented except when the door is completely shut.

The arm may be mounted upon the jamb post in such a manner as to pivot about a horizontal or vertical axis but it is preferred to employ pivoting about a horizontal axis as in this case the weight of the arm may be used to return it to a position close to the jamb post, whereas if the pivoting takes place about a vertical axis a spring or other means may be necessary to cause its return.

The bolt is preferably spring urged into its operative position and, in order to permit ready closing of the door,

, reaches the end of this groove, thus preventing the door 2,919,945 Patented Jan. 5, 1960 opposed cam facesmay be provided on the end of the bolt and on the arm in order to cause movement of the bolt into a withdrawn position followed by its return under spring pressure to engage the arm as the door is closed. f In order that the invention may more readily be understood certain embodiments will be described with reference to the accompanying drawings, in which:

Figure l is a rear elevational view of a door having a fastening device of this invention applied thereto;

Figure 2 is a section on the line II-II of Figure 1, but showing the door partly opened;

Figure 3 is a scrap view corresponding to Figure 1 and showing a further embodimenfland Figure 4 is a section on the line IV- IV of Figure 3,.

but showing the door partly opened.

:In'the embodiment illustrated in Figures 1 and 2, an arm 1 having a groove2 in one side thereof is pivoted to a member 3 adapted to be secured by screws to the jamb post 4 of the door so as to be pivotal about a horizontal axis, the weight'of the arm 1 normally maintaining it in the vertical position shown in Figure '1. A housing 5 is secured to the door adjacent to its edge and this housing supports a bolt 6 which is urged'by a spring 7 towards the arm 1, a knob 8 protruding through a slot 9 in the housing 5 .servingto withdraw the bolt 6 against the influence of the spring 7 as will hereinafter be apparent. The head 10 ofthe bolt 6 is normally engaged in the groove 2 so that when the door is opened the arm 1 is caused to pivot relatively to the member 3 as illustrated in Figure 2 and the head 10 of the bolt will slide down the groove 2 until it being opened any further. Obviously the door may be fully opened by actuating the knob 8 to withdraw the head 10 from the groove 2 and, in order to permit closing of the door without actuation of the knob 8, the head 10 is slightly rounded at its end and the outer side of the arm 1 is'provided with a cam surface 11 which, on engagement with the head of the bolt, will cause the latter to be displaced against the action of the spring 7 to permit its snapping into the groove 2.

{Asshown in Figure 1, the door is provided with a cylinder lock 12 of the type sold under the registered trade mark Yale and in order to permit actuation of the bolt 6 to free the door when the lock 12 is opened by means of its key, the tongue 13 which is coaxial with the cylinder in such locks is engaged in a slot in a short lever 14, whichhas pivoted to the other end of it about a pivot pin 15,a1ink 16 which extends between'the lock 12 and the housing 5. At its other end, the link 16 is pivoted by a pin 17 toone corner of a triangular cam member 18 which is pivoted by a pin 19 to the housing 5, this cam member 18 hearing against a projection 20 on the rear. side of the knob 8. Thus when the cylinder of the lock 12' is'turned by means of its key, the tongue 13; will rotate and cause rotation of the short lever 14 in the anticlockwise direction and therefore movement of the link 16 in the direction of the arrow A. Thisin turn will cause anticlockwise movement of the cam member 18 and withdrawal of the bolt 6.

In the embodiment illustrated in Figures 3 and 4, the construction of the housing 5 may be substantially the same as that illustrated in Figures 1 and 2 but the construction of the arm differs. Thus as may be seen from Figure 3, the arm 1' is pivoted to the member 3' by means of a pair of vertically extending pivot pins 21 and 22, the pivot pin 22 having a torsion spring 23 engaged therewith in order to cause the arm 1 to normally be maintained in the position in which it is flat against the jamb post. In this embodiment of the invention, the groove 2' is on the front side of the arm 1 and as can be clearly seen from Figures 3 and 4 is of undercut formation. The head 10' of the bolt 6 is of part spherical formation and engages closely in the groove 2', the inner and open end of the groove 2' being radiused and lipped as at 2a to enable the head to be cammed against the influence of the spring 7 over the end of the groove 2' so that as the door moves into the closed position the head 10 is snapped into the groove 2'. It will be understood that in both embodiments herein described the groove 2 is a channel as distinct from a slot so that the channel loosely embraces the head 10 to minimise friction, the radiused formation of the head acting somewhat as a sphere running in a channel. It will be observed that, although the head it? may be withdrawn from the groove by movement of the bolt 6 in the direction of the arrow B of Figure 3 when the door is in the closed position, as soon as the door is partially opened the fact that the bolt head 10 is larger than the entrance to the slot 2 will prevent withdrawal of the bolt 6 to permit free opening of the door, thereby preventing anyone who has forced the door partially open from releasing the fastening device. Obviously the shape of the bolt head and groove described with reference to Figures 3 and 4 may be applied to the construction described with reference to Figures 1 and 2 if desired.

In order to render the fastening device inoperative, if this should be desired for any reason, catch means may be provided for retaining the knob 8 in its withdrawn position but such catch means are not illustrated in the drawings.

A hole 24' is provided in the arm 1' adjacent to its end and a corresponding hole 27 is provided in the bolt head, a screw or pin 25 may be inserted through these holes for the purpose of holding the door slightly open, e.g. to obtain air.

I claim:

1. A fastening device for doors comprising an arm, a lengthwise guideway in said arm, a bracket member adapted to be mounted on the jamb post of a door, means pivotally connecting one end of said arm to said bracket member, a housing adapted to be mounted on the door, a bolt slidable in said housing and projecting at one end beyond one end of said housing, a head on the latter end of said bolt slidable in said guideway and so mating in said guideway that as the door is opened the arm is caused to pivot relative to the jamb post, an abutment at the end of the arm limiting the sliding movement and hence the opening movement of the door, spring means urging said bolt into operative inter-engagement with said guideway, remote control means to retract the bolt from said arm, and means to connect said remote control means to a door lock to effect withdrawal of said bolt from said arm upon operating the door lock to open the door.

2. A fastening device for doors comprising an arm, a lengthwise guideway in said arm, a bracket member adapted to be mounted on the jamb post of a door, means pivotally connecting one end of said arm to said bracket member, a housing adapted to be mounted on the door, a bolt slidable in said housing and projecting at one end beyond one end of said housing, a head on the latter end of said bolt slidable in said guideway and so mating in said guideway that as the door is opened the arm is caused to pivot relative to the jamb post, an abutment at the end of the arm limiting the sliding movement and hence the opening movement of the door, spring means urging said bolt into operative interengagement with said guideway, a cam driver pivoted in said housing, an abutment on said bolt engaged by said cam driver, a link connected at one end to said cam driver and extending outwardly from said housing, a lever to which the other end of said link is connected, said lever being attachable for its operation to a rotary actuating member of a door lock.

3. A fastening device for doors comprising an arm, a lengthwise guideway in said arm, a bracket member adapted to be mounted on the jamb post of a door, means pivotally connecting one end of said arm to said bracket member, a housing adapted to be mounted on the door, a bolt slidable in said housing and projecting at .one end beyond one end of said housing, a head on the latter end of said bolt slidable in said guideway and so mating in said guideway that as the door is opened the arm is caused to pivot relative to the jamb post, an abutment at the end of the arm limiting the sliding movement and hence the opening movement of the door, spring means urging said bolt into operative inter-engagement with said guideway, and means to interconnect a lock mounted on the door with the said bolt in suchmanner that operation of the lock causes withdrawal of the bolt.

4. A fastening device for doors according to claim 3, wherein said arm is a rod like member and the said guideway is a channel extending from the pivoted end of the arm but terminating short of the other end, the head of said bolt being overlapped by the opposed longitudinal outer edges of said channel and being obscured by the arm where accommodated therein, the periphery of said arm adjacent to its pivoted end being formed with a cam-like depression merging into the said channel to afford a camber over which the head of the bolt can be pressed against the influence of the spring so as to press the head into said channel, said cam-like depression increasing the width of the channel in alignment with the bolt when the door is closed to afford a gap through which the bolt may be retracted from said arm.

5. A fastening device for doors according to claim 3, wherein said arm is pivoted on a vertical axis so as normally to lie co-axial with the bolt, the said guide being an undercut channel extending along the arm and open at its end of the arm adjacent to its pivoted support to receive the head of the bolt, the other end of the channel being terminated short of the free end of the channel and the said head having a radiused rim to facilitate its engagement by lateral pressure into the open end of said channel due to the closing of the door, spring means with the pivot of said arm returning the arm to its normal position.

References Cited in the file of this patent UNITED STATES PATENTS 388,074 Reardon et al Aug. 21, 1888 1,673,189 Frank et al. June 12, 1928 2,369,136 Chambers et al. Feb. 13, 1945 FOREIGN PATENTS 11,631 Germany Mar. '11, 1880 27,786 Great Britain Mar. 10, 1910 322,971 Germany July 13, 1920