US722468A - Pedestal-extension-table locking device. - Google Patents

Pedestal-extension-table locking device. Download PDF

Info

Publication number
US722468A
US722468A US10966002A US1902109660A US722468A US 722468 A US722468 A US 722468A US 10966002 A US10966002 A US 10966002A US 1902109660 A US1902109660 A US 1902109660A US 722468 A US722468 A US 722468A
Authority
US
United States
Prior art keywords
pedestal
latch
latches
lever
members
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US10966002A
Inventor
Emil Tyden
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US10966002A priority Critical patent/US722468A/en
Application granted granted Critical
Publication of US722468A publication Critical patent/US722468A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47BTABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B3/00Folding or stowable tables
    • A47B3/02Folding or stowable tables with foldable cross legs

Definitions

  • This invention relates to devices for engaging and drawing together the parts of the pedestal of an extension-table, which are liable to sag apart at the lower end when the table is closed up.
  • Figure 1 is a partly-sectional elevation of a pedestal extension-table having my improvement, section being made axially through the pedestal to disclose the interior parts, the table being shown in locked position of the parts.
  • Fig. 2 is a detail view similar to Fig. 1 so far as the locking parts are concerned, but showing them in an unlocked position, but ready for engagement.
  • Fig. 3 is a detail section at line 3 3 on Fig.1.
  • Fig. 4 is a detail section at line 4 4 on Fig. 2.
  • Fig. 5 is a section at line 5 5 on Fig. 1.
  • Fig. 6 is a view similar to Fig. 1, showing the modified structure.
  • Fig. 7 is a section at line 7 7 on Fig. 6.
  • 1 1 are the two members of the table, which are closed together or extended, according to the use.
  • 5 is the customary center leg, which is socured to the bridge 3 and performs the customary function of upholding the extension devices when the table is extended.
  • I employ for locking the pedestalmembers together a latch 6, fulcrumed on the center leg 5 at a substantial distance below the top of the table, having at its opposite ends hooks 7 7, one of which turns downward and the other upward, the two pedestal members having secured to them at their inner surfaces facing each other at opposite sides of the center leg plates 8 8, which are adapted to be engaged by the books 7 7, respectively, and constitute the latch-stops, the pedestal side walls being slightly recessed, as shown at 9 9,to receive the hooks when they are engaged behind the plates and the plates having inwardly-struck lips 8 which form inclined cams for engagement of the hooks as they are forced in behind the plates to crowd the pedestal parts together tightly, the hooks being of suitable length to pass down over the entire inclined portion and become engaged against the inner face of the plates below the incline, so that tendency of members to separate may be resisted positively by such engagement, and, if necessary,the plates may be slightly recessed below the inclined portion, where the nose of .the hook lodges
  • I employ two latches, secured rigidly at opposite ends of the short rock-shaft 10, which are journaled in a center leg, each of the latches having its appropriate engaging plates 8 8 secured tothe opposite pedestal parts, respectively, as seen in Fig. 4.
  • I provide a link, which in order to engage both latches and operate them'most easily I make up of two members l1 l1, symmetrically formed and riveted together, as shown, each part practically coustituting a complete link, theirlower ends being spread, as seen in Fig. 3, to engage, respectively, the two latches, to which they are pivoted at 12 12.
  • the latch may readily enter over and behind the plates when the pedestal parts are closed together,its hook-noses7 maybe formed with an outer inclined face or edge 7, which encountering the edge of the inclined cam-lip 8 as the parts are closed together rides on the said edge and with the hook passes it and enters behind the lip ready to be thrust down into the desired looking engagement with the
  • a slide-bar 20 mounted upon one of the members of the table, which is constructed suitably to engage the lever-arms or some part connected with them-as, for example, the pivot 14, which connects the links ll 11 to them--When the pedestal parts are near enough together to permit the locking action.
  • rocking the latch on its pivot down atone end and up at the other is further assisted by the push of the end of the slide-bar against said pivot, because both actions tend to rock the lever-arms 15 15 downward, and either of said elementsthat is to say, the inclined faces of the latch-noses or the pivot encountering the end of the slide-bar 20-may be solely relied upon for the purpose; but preferably, as shown both means are provided, each tending to assist and insure the opera tion of the other.
  • each or both of said means operating in the manner described the latchnoses finally pass over the edges of the camlips, and at the same time the pivot 1'4'reaches the lower corner of the end of the slide-bar and passes under the same, and as the latchnoses pass, respectively, up and down behind the inclined lips 8 the lever-arms 15 15, rocking back a little toward upright position, carry the pivot 14 fairly into the notch 21.
  • the lips 8 are designed to be protruded inward enough so that the maximum sag or separation at the lower end of the table parts when the two members of the table-top are together will be exceeded by said protrusion of the lips and that the noses of the latch will lodge on the inclined slope of the alialittle inward from the crest of the same.
  • the pivot 14 will be within the notch 21, as described.
  • the slide-bar 20 being new pulled toward the end of the table, the pivot will be engaged by the shoulder of the notch and the engage ment become deeper as the lever-arms 15 15 are rocked up toward erect position, forcing the latch-noses along the inclined slope of the cam-lips until when the pedestal parts are close together the latch-noses will reach the limit of said inclined lips and be thrust down beyond the straight portion of the plates 8 S to secure engagement, the pivot 14 having meantime been drawn past the direct line from the fulcrum 16 of the lever-arms of the pivotal connection of the link 11 with the latch.
  • Figs. 6 and 7 The modification of this structure, as shown in Figs. 6 and 7, consists in employing two latches instead of one, both latches operating upward to effect engagement with the pedestal members.
  • a sleeve or ferrule 23 which is made rigid therewith, said ferrule constituting a pivot-hanger for the latches and for that purpose being provided with pivot-studs 26 26 26 26, to which are pivoted the four latches 27 27 27, two upon each side, each pair of latches being extended from their pivots toward the pedestal member on the opposite side of the leg from that upon which said pivots are located, so that the latches from either side pass by the pivots of the latches on the other side, and for that purpose thelatches are made with the notch or recess 27 to permit them to oscillate properly where they pass said opposite pivots.
  • the latches are operated by the link 11, and I provide for the purpose of reciprocating said rod 29 a construction substantially similar to that already described, mounted at the top of the leg of the bridge 3, the aperture in said leg being tapered, widening from the lower end toward the upper end to permit the oscil lation of the rod 29 after the manner of the link 11 as the upper end is carried with the rocking movement of the lever-arms 15 15.
  • the latch In order to render the action of the device as nearly automatic as possible and require the minimum mechanical understanding of the structure in order to enable an operator to manipulate it successfully in looking and unlocking, itis desirable that the latch should normally stand at a position intermediate between the two extreme positions which it may occupy, the one when it passes over the edge of the cam-lip 8 and the other when it is in finally locked position engaged behind the straight portion of the plate 8, and for this purpose a convenient device is that shown in Figs.
  • the spring therefore operates to throw the pivot 1-1 up into the notch 21 when the members of the table arebeing closed together and after the encounter of the end of the slide-bar with said pivot has rocked the lever-arms 15 15 far enough to tilt the latchhooks into position for passing the edges of the cam-lips 8 and at the same time of course the latch-hooks are thrown down behind the lips or onto their cam-slope ready to be thrust farther down into full engagement when the operator pulls the slide-bar.
  • latch-stop which is herein shown consisting of the plates 8; but I employ the term latch-stop in my claims to denote generically the elements with which the latch engages for performing its office of securing the part on which it is mounted to the part on which the stop is mounted.
  • extension device for the table; but my invention is not limited to use with such extension devices, but, on the contrary, any element of the table structure which is intermediate between the two members of the table when it is extended so as to be adapted to carry the locking devices in position to be inclosed between the pedestal members when they are brought together will be within the meaning of the term extension devices as employed in my claims.
  • I claim- 1 In a pedestal extension-table, in combination with the upper structure comprising the separabletable members and extensionslides which connect them; the pedestal members pertaining to said separable members respectively; latching devices carried by said upper structure adapted for engaging the pedestal members at a substantial distance below the table-top, and latch-stops on the pedestal members respectively; a lever having its fulcrum carried by said upper structure; a link connecting it to the latching devices for forcing the same into engagement with the latch-stops; means for rocking the lever over its fulcrum to effect such engagement, and astop for limitingits rocking movement when the pivot of the link thereto has passed beyond the line from the other pivot of the link to the fulcrum.
  • a latching device pivoted on such element; latch-stops on the pedestal members respectively a lever fulcrumed at the top of said element; a link connecting it with the latching device; means for rocking the lever over its fulcrum and a stop for limiting its rocking movement when the pivot of the link thereto has passed beyond the line from the other pivot of the link to the lever-fulcrum.
  • a'pedestal extension-table in combination with the upper structure comprising the separable table members and extensionslides which connect them; the pedestal members pertaining to said separable members respectively; latching devices carried by said upper structure adapted for engaging the pedestal members at a substantial distance below the table-top, and latch-housings on the pedestal members respectively for such engagement; a lever having its fulcrum carried by said upper structure; a link connecting it to the latching devices; a slide-bar on one of the table members adapted by endwise movement to rock the lever to actuate the latching devices to position for entering the latch-stop, said bar having a delay-surface for holding the lever at such position during further end- Wise movement of thebar While the latching devices thus enter, and having back of the delay-surface a notch to engage the lever;
  • a pedestal extension-table in combination with the upper structure comprising the separable table members and extensionslides which connect them; the pedestal members pertaining to said separable members respectively; latching devices carried by said upper structure adapted for engaging the pedestal members at a substantial distance below the table-top, and latch-stops on the pedestal members respectively for such engagement; a lever having its fulcrum carried by said upper structure; a link connecting it to the latching devices for operating the same to force them into and take them out of engagement with the latch-stops respectively, a slide-bar on one of the table members having a shoulder in position adapted to engage said lever by movement in one direction when the members are near together, for rocking the lever away from horizontal position to force the latches to locked position, and having a second shoulderfacing the first which encounters the lever when the bar is moved in the opposite direction and rocks the lever back toward horizontal position to disengage the latches from the housings, the notch or interval between said shoulders being in position and extent to be traversed by the lever while the latch is passing over
  • a pedestal extension-table having an element extending downward from the extension devices within the pedestal; a latching device pivoted on such element; latch-stops on the pedestal members respectively; a lever fulcrumed at the top of said element; a link connecting it with the latching device; a slide-bar mounted on one of the table members adapted to encounter the lever when the bar is moved endwise in one direction and rock said lever toward horizontal position to tilt the latch to position for entering the latchstops, and having a delay-surface by which the lever is held in position to retain the latches in entering position during further closing movement of the pedestal members, and a shoulder back of said delay-surface for engagement of the bar with the lever, and means causing one of said parts to react to efiect such engagement when the delay-surface is passed, the bar being adapted to be retracted with respect to the table member on which it is mounted after such engagement to rock the lever away from horizontal position to force the latching devices into engagement with the latch-stops.
  • a pedestal extension-table having an element extending down from the extension devices within the pedestal, a latching device pivoted on such element; latch-stops on the pedestal members respectively; a lever fulcrumed at the top of said element; a link connecting it with the latching device; a slidebar mounted on one of the table members adapted to be moved endwise thereon and carried endwise therewith as the table is closed up and extended, said lever having a notch in which the lever is engaged when the pedestal members are closed together, whereby the forward endwise movement of the bar causes one shoulder of said notch to engage the lever and rock it toward horizontal position for disengaging the latch from the stops, the other shoulder of the notch being of less extent and the bar being adapted to be further thrust in the same direction while the table member on which it is carried is moved in the opposite direction to extend thetable, and a stop limiting such thrust of the bar at the position at which the latch is passing the edge of the stop; whereby the lever passes the notch and is prevented from engaging with the opposite shoulder while the latch is thus rest
  • a pedestal extension-table having an element extending down from the extension devices within the pedestal, in combination with latching devices on said element and stops for engaging them on the pedestal parts respectively, means for operating the latching devices comprising the lever, 15, and the links connecting it to the latching devices, the slide-bar having the notch, 21, with its inner and outer shoulders of different extent and the delay-surface beyond the outer shoulder, the lever, 33, fulcrumed on the table member which carries the slide-bar, and pivotally connected to the latter at one side of its fulcrum, and havingone handle at the opposite side of said fulcrum and another at the opposite side of said pivotal connection, and a stop limiting the endwise thrust movement of the bar on the table member.
  • a pedestal extension-table having an element extending down from the extension devices within the pedestal; a latching device pivoted on said element within the pedestal; latch-stops on the pedestal members respectively, having their latch-engaging lips provided with inclined inner faces for the track of the latch moving into engagement with the stops; and means extending from the latch to one end of said element on which the latch is pivoted for forcing the latch along said inclined faces into such engagement.
  • a pedestal extension-table having an element extending downward from the extension devices within the pedestal; a latching device pivoted on such element; latch-stops on the pedestal members respectively; means extending to one end of said element for operating the latch to withdraw it from engagement with the stops, the latch having inclined pilot-noses to guide it into engagement with the stops.
  • a pedestal extension-table in combination with the upper structure comprising separable table members and the extensionslides which connect them, the pedestal members pertaining to said separable members respectively; latching mechanism carried by said upper structure for connecting the pedestal members ata substantial distance below the table-top, comprising two pairsof latches having fulcrum-support depending from the extension-slides, one latch of each pair at each side of the center of the pedestal, the
  • latches of one pair extending to one pedestal member and those of the other pair to the other pedestal member, and latch-stops on the pedestal members for said latches respectively.
  • a pedestal extension-table having an element extending downward from the extension devices Within the pedestal, two pairs of latches pivoted on such element, the latches of one pair extending toward one pedestal member and those of the other pair toward the other pedestal member, and latch-stops on the pedestal members respectively for engagement of the latches; a link connecting the latches upwardly and means at the upper part of said element on which the latches are pivoted for actuating the link to operate the latches.
  • apedestal extension-table having an element extending downward from the extension devices within the pedestal, devices for locking together the two pedestal members comprising two pairs of latches,all four latches being pivoted to said element, those of one pair for engagement With one pedestal member and those of the other pair for engagement with the other pedestal member; latchstops on the pe estal members for such engagement, the pivots of the latches to said element being at the opposite side of said element from the pedestal members which the latches respectively engage; a reciprocating rod extending within the said element, having a cross-head emerging therefrom for engaging the latches between their pivots; and means at the upper end of the latch-supporting element for actuating said rod to engage and disengage the latches.
  • a pedestal extension-table in combination with the separable members, the extension-slides connecting them and the pedestal members pertaining to said separable members respectively, the center leg carried by the extension-slides and extending within the pedestal members when the latter are closed; a sleeve secured on the center leg and having two pairs of pivot-studs projecting from it, two pairs of latches pivoted upon said studs respectively, those of each pair extending from the pivot-stud past the center leg toward the opposite pedestal member; latch-stops upon the pedestal members for the engagement of said latches respectively; and means connected with the latches between the two pivot-studs at each side and extending thence upward to the top of the leg for operating the latches.
  • a pedestal extension-table in combination with the separable members, extension-slides connecting them and the pedestal members pertaining to the separable members respectively, the center leg carried by the extension-slides and extending within the pedestal when its members are closed up; two pairs of latches pivoted to said center leg, those of one pair for engagement with one pedestal member and those of the other pair for engagement with the other pedestal member, the pivots of the latches being at the opposite side of the center leg from the pedestal member which they engage; latch-stops on the pedestal members for such engagement, and connections for operating the latches engaging the same at the opposite sides of the center leg between the pivots and extending thence up to the upper end of the center leg; and means at the upper end of the center leg for actuating such connections to operate the latches.
  • a pedestal extension-table in combination with the extension devices and an element extending downward therefrom, two pairs of latches pivoted on said element at opposite sides thereof and at a substantial distance below the table-top, the latches of each pair extending parallel with each other from their pivots past the center of the pedestal toward the pedestal member at the opposite side; a link guided at the lower end on said latch-supporting element, and having loose pivotal connection atone side with one latch of each pair, and at the other side with the other latches, and means at the upper end of said latch-supporting element connected to the link to operate the latches.

Description

No. 722,468. PATENTED MAR.10,1903.
' E.TYDEN.
PEDESTAL EXTENSION TABLE LOOKING DEVICE.
APPLICATION FILED MAY 31, 1902.
no 11011121.. I z SHEETS-S 1.
UNITED STATES PATENT OFFICE.
EMIL TYDEN, on HASTINGS, MICHIGAN.
PEDESTAL-EXTENSION-TABLE LOCKING DEVIC E.
SPECIFICATION forming partof Letters Patent No. 722,468, dated March 10, 1903. Application filed May 31, 1902. Serial No. 109,660- (No model.)
To all whom, it may concern:
Beit known that I, EMIL TYDEN, a citizenof the United States, and aresident of Hastings, Michigan, have invented certain new and use ful Improvements in Pedestal Extension- Table Locking Devices, of which the following is a specification, reference being made to the accompanying drawings, forming a part hereof.
This invention relates to devices for engaging and drawing together the parts of the pedestal of an extension-table, which are liable to sag apart at the lower end when the table is closed up. I
It consists of specific means for this purpose, which are set out in-the claims.
In the drawings, Figure 1 is a partly-sectional elevation of a pedestal extension-table having my improvement, section being made axially through the pedestal to disclose the interior parts, the table being shown in locked position of the parts. Fig. 2 is a detail view similar to Fig. 1 so far as the locking parts are concerned, but showing them in an unlocked position, but ready for engagement. Fig. 3 is a detail section at line 3 3 on Fig.1. Fig. 4 is a detail section at line 4 4 on Fig. 2. Fig. 5 is a section at line 5 5 on Fig. 1. Fig. 6 is a view similar to Fig. 1, showing the modified structure. Fig. 7 is a section at line 7 7 on Fig. 6.
1 1 are the two members of the table, which are closed together or extended, according to the use.
2 2 are the pedestal members pertaining to the table members'l 1, respectively.
3 represents the bridge, which connects two of the extension-slides, one of which appears at 4.
5 is the customary center leg, which is socured to the bridge 3 and performs the customary function of upholding the extension devices when the table is extended.
In the form shown in Figs. 1 to 4, inclusive, I employ for locking the pedestalmembers together a latch 6, fulcrumed on the center leg 5 at a substantial distance below the top of the table, having at its opposite ends hooks 7 7, one of which turns downward and the other upward, the two pedestal members having secured to them at their inner surfaces facing each other at opposite sides of the center leg plates 8 8, which are adapted to be engaged by the books 7 7, respectively, and constitute the latch-stops, the pedestal side walls being slightly recessed, as shown at 9 9,to receive the hooks when they are engaged behind the plates and the plates having inwardly-struck lips 8 which form inclined cams for engagement of the hooks as they are forced in behind the plates to crowd the pedestal parts together tightly, the hooks being of suitable length to pass down over the entire inclined portion and become engaged against the inner face of the plates below the incline, so that tendency of members to separate may be resisted positively by such engagement, and, if necessary,the plates may be slightly recessed below the inclined portion, where the nose of .the hook lodges when the parts are at locked position; thus increasing the security of the engagement. In the preferred form, which, as may be understood from Fig. 4, is represented in the first group of figures, I employ two latches, secured rigidly at opposite ends of the short rock-shaft 10, which are journaled in a center leg, each of the latches having its appropriate engaging plates 8 8 secured tothe opposite pedestal parts, respectively, as seen in Fig. 4. For the purpose of operating the latch or latches I provide a link, which in order to engage both latches and operate them'most easily I make up of two members l1 l1, symmetrically formed and riveted together, as shown, each part practically coustituting a complete link, theirlower ends being spread, as seen in Fig. 3, to engage, respectively, the two latches, to which they are pivoted at 12 12. At the upper side said links 11 11 are spread, forming a fork, whose arms 13 13 are connected to the pivot 14:, which has two short lever-arms 15 15 extending down to pivots at 16 16 on the plate 17, secured on the upper side of the bridge 3. The leverarms 15 15 when the latches arein position to be engaged to pass by the edges of the plates 8 8, respectively, as seen in.Fig. 2, are inclined from vertical position at an angle of about thirty to forty-five degrees over toward the side at which the link 11 is extended down to reach the latches. The parts having reached this position ready for engagement, it will be seen that if the lever-arms 15 15 are swung over to position at which the plate.
stress of the parts drawn together will tend to prevent return past that line, and if stopped against further movement in the same direction the parts will be locked. The link is most conveniently stopped 'to limit the rocking movement at the desired locked position by colliding with the side of the bridge 3 or the plate 17, which may be extended to or beyond that side to afford such stop. If the lever-arms 15 15 are rocked in the other direction back past the line indicated, the reaction of the parts will immediately release the latches, and further movement will positively withdraw them from engagement with the plates 8 8. It will not be necessary to withdraw them positively farther than to cause them to reach the incline 8, and then the table parts being separated they will ride up the inclines freely. I construct the latch so that with the weight of the parts connected with it and the stress of the spring which may be employed to control its position, as hereinafter described, it tends to stand at a position intermediate to that to which it must move in order to effectively engage the plates for locking and that to which it must move to let the hooks pass the lips 8. In order that, notwithstanding its tendency to occupy this position, the latch may readily enter over and behind the plates when the pedestal parts are closed together,its hook-noses7 maybe formed with an outer inclined face or edge 7, which encountering the edge of the inclined cam-lip 8 as the parts are closed together rides on the said edge and with the hook passes it and enters behind the lip ready to be thrust down into the desired looking engagement with the For the purpose of rocking the leverarms 15 15 through the necessary angle to perform the function above described I provide a slide-bar 20, mounted upon one of the members of the table, which is constructed suitably to engage the lever-arms or some part connected with them-as, for example, the pivot 14, which connects the links ll 11 to them--When the pedestal parts are near enough together to permit the locking action. When the pedestal parts are brought near enough together so that the inclined faces 7 of the latch-noses 7 are in contact with the edges of the cam Iips 8 and ready to ride'on said edges as the pedestal parts are further made to approach, the extremity of the slidebar beyond the notch 21 is in contact with the pivot 14, so that as the table members are further pushed together and the latch-noses ride over the edges of the lips 8 such action,
rocking the latch on its pivot down atone end and up at the other, is further assisted by the push of the end of the slide-bar against said pivot, because both actions tend to rock the lever-arms 15 15 downward, and either of said elementsthat is to say, the inclined faces of the latch-noses or the pivot encountering the end of the slide-bar 20-may be solely relied upon for the purpose; but preferably, as shown both means are provided, each tending to assist and insure the opera tion of the other. Each or both of said means operating in the manner described the latchnoses finally pass over the edges of the camlips, and at the same time the pivot 1'4'reaches the lower corner of the end of the slide-bar and passes under the same, and as the latchnoses pass, respectively, up and down behind the inclined lips 8 the lever-arms 15 15, rocking back a little toward upright position, carry the pivot 14 fairly into the notch 21. The lips 8 are designed to be protruded inward enough so that the maximum sag or separation at the lower end of the table parts when the two members of the table-top are together will be exceeded by said protrusion of the lips and that the noses of the latch will lodge on the inclined slope of the lipsalittle inward from the crest of the same. Thus by the time it becomes necessary to use the devices for the purpose of forcibly clamping the parts of the pedestal together the pivot 14 will be within the notch 21, as described. The slide-bar 20 being new pulled toward the end of the table, the pivot will be engaged by the shoulder of the notch and the engage ment become deeper as the lever-arms 15 15 are rocked up toward erect position, forcing the latch-noses along the inclined slope of the cam-lips until when the pedestal parts are close together the latch-noses will reach the limit of said inclined lips and be thrust down beyond the straight portion of the plates 8 S to secure engagement, the pivot 14 having meantime been drawn past the direct line from the fulcrum 16 of the lever-arms of the pivotal connection of the link 11 with the latch. The parts will be thus in the locked position desired. For unlocking the operator will thrust the bar 20 forward-that is, toward the junction-line of the two-members of the table-top-and the shoulder 21 on the notch operating on the pivot 14 will rock the lever-arms 15 15 over past the locked position and on down far enough to fully free the.
latches from their locked position. This movement may be continued until the latches are lifted entirely clear of the lips; but it will be suflicient' to continue it until they are in position to encounter the inclined slope of said lips when the table parts are pulled apart, because they will ride up on said lips and pass over them, the pivot 14 in that action, Whether caused by the push of the slidebar or by the action of the latch, as described, being carried downward to a point which will permit the terminal of the slide-bar beyond IIO the notch to pass freely over the pivot as the table parts are farther separated.
The modification of this structure, as shown in Figs. 6 and 7, consists in employing two latches instead of one, both latches operating upward to effect engagement with the pedestal members. Referring to these figures, there will be found mounted on the center leg a sleeve or ferrule 23, which is made rigid therewith, said ferrule constituting a pivot-hanger for the latches and for that purpose being provided with pivot-studs 26 26 26 26, to which are pivoted the four latches 27 27 27 27, two upon each side, each pair of latches being extended from their pivots toward the pedestal member on the opposite side of the leg from that upon which said pivots are located, so that the latches from either side pass by the pivots of the latches on the other side, and for that purpose thelatches are made with the notch or recess 27 to permit them to oscillate properly where they pass said opposite pivots. The corresponding latches of the two pairsthat is, the two at either side of the leg, which extend one toward one pedestal member and the other toward the other memberlie alongside each other and are slotted to receive the cross-head 28 of an operating-rod 29, which extends axially within the center leg and protrudes above the bridge 3, the leg and the sleeve or ferrule 23 being vertically slotted to accommodate the cross-head 28. It will be seen that with this construction the reciprocation of the rod 29 and its cross head 28 will operate all the latches in substantially the same manner as in the construction shown in the other figures. The latches are operated by the link 11, and I provide for the purpose of reciprocating said rod 29 a construction substantially similar to that already described, mounted at the top of the leg of the bridge 3, the aperture in said leg being tapered, widening from the lower end toward the upper end to permit the oscil lation of the rod 29 after the manner of the link 11 as the upper end is carried with the rocking movement of the lever-arms 15 15.
It is manifest that one latch on either side may be dispensed with without affecting the substance of the invention.
In order to render the action of the device as nearly automatic as possible and require the minimum mechanical understanding of the structure in order to enable an operator to manipulate it successfully in looking and unlocking, itis desirable that the latch should normally stand at a position intermediate between the two extreme positions which it may occupy, the one when it passes over the edge of the cam-lip 8 and the other when it is in finally locked position engaged behind the straight portion of the plate 8, and for this purpose a convenient device is that shown in Figs. 1 and 2,which consists ofa tensile spring 30, attached to a lug 31, projecting upward from the hub of either of the latches, the other end of the spring being attached by an eye 32, secured to the side of the leg 5, the pull on the spring tending to bring the point of its attachment to the lug 31 in line with the pivot of the latch, and the other attachment of the spring tends to cause the latch to stand at the intermediate position indicated and to return to that position'from either direction. The spring therefore operates to throw the pivot 1-1 up into the notch 21 when the members of the table arebeing closed together and after the encounter of the end of the slide-bar with said pivot has rocked the lever-arms 15 15 far enough to tilt the latchhooks into position for passing the edges of the cam-lips 8 and at the same time of course the latch-hooks are thrown down behind the lips or onto their cam-slope ready to be thrust farther down into full engagement when the operator pulls the slide-bar.
I have referred to the movement of the slide-bar by which the locking is effected as a pull, because the bar is in that action moved toward the operator standing at the end of the table. It is preferable, however, to have the movement which the operator makes for closing up the table and operating the lock in that process'a push, because that is the direction of movement whichis being given to the table member at the end at which the operator stands, the opposite member being held opposed to that movement by its stability on the floor and its inertia tending to resist the push, and'similarly in extending the table it is desirable that the movement which the operator gives to unlock the device should be a pull. In order to make the movement upon the slide-bar 29 in looking a pull on that bar-that is, a movement of the bar with respect to the table in a direction toward the operatorand to make the contrary movement for unlocking a push on the bar with respect to the table, while the actual movement which the operator makes is a pull in unlocking and a push in looking, I prefer to provide for operating said bar by means of a lever 33, fulcru med at 3a on the table-top and pivotally connected to the slide-bar at 35 at one side of the fulcrum, the lever being provided with one handle 36 at the opposite side of the fulcrum and another handle 37 at the opposite of its pivotal connection to the slidebar. With this construction the operator in unlocking and extending the table will take hold of the handle 36 and pull toward the end of the table, causing the bar 20 to be thrust or pushed away from him, while the stress of the pull operating upon the table member through the pivot 3% tends to draw that member away from the other, as should be done to separate the table members as soon as the latch is disengaged. It will be noted that as the operator thus pulls on the handle and thrusts the slide-bar from him the pivot 14 is first forced over the fulcrum of the lever-arms 15 15, and then said arms are further rocked on beyond the fulcrum, the pivot 14 in such movement traveling down along the face of IIO the shoulder 21 and the latch-hooks being withdrawn from behind theplates 8; but the spring 30 will tend to resist this action and restore the latch and the pivot 14 after the middle point of the movements is past. Nevertheless said movement must be continued, and the pivot must be held down until the slide-bar is withdrawn, so that the other shoulder of the notch 21 may pass back over the pivot. This can only be done by continuing the thrust of the bar while the table parts are being separated enough to compensate for such separation and until the separation has continued far enough to carry the latch-hooks out past the edges of the lips 8. While the ends of the hooks are passing over these edges the latch is prevented by the lips from i returning to its normal position under the stress of the spring 30, and during that part of the separating movement of the table members the pivot 14 will pass from one side to the other of the notch 21 and arrive under the end of the terminal nose of the bar 20 and be past the possibility of being thrown back into the notch. In closing up the table the operator will push first on the handle 37, which will have the effect of pushing also on the slide-bar 20,.and at the same time the push will operate on the table member to move it toward the opposite memher, as desired. The push on the bar 20 will throw the latch-hooks into position to pass the edges of the lips 8 and be ready to become engaged behind them when the table members are together at the top or so nearly together that the locking action may be performed. The operator will then transfer his push from the handle 37 to the handle 36, but will continue to push, thus pulling on the slide-bar, which is the proper movement to operate the locking device, While he will still be pushing on the table, as is necessary, since otherwise if he should pull on the table the tendency would be to separate the members and get the latches out of. locking position, and such position will be continued until the locking is effected, which will be readily perceived by the slight reaction which will be felt when the pivot 1 L passes over the center.
I do not limit myself to the particular form of latch-stop which is herein shown consisting of the plates 8; but I employ the term latch-stop in my claims to denote generically the elements with which the latch engages for performing its office of securing the part on which it is mounted to the part on which the stop is mounted. I
I have shown a familiar form of extension device for the table; but my invention is not limited to use with such extension devices, but, on the contrary, any element of the table structure which is intermediate between the two members of the table when it is extended so as to be adapted to carry the locking devices in position to be inclosed between the pedestal members when they are brought together will be within the meaning of the term extension devices as employed in my claims.
I claim- 1. In a pedestal extension-table, in combination with the upper structure comprising the separabletable members and extensionslides which connect them; the pedestal members pertaining to said separable members respectively; latching devices carried by said upper structure adapted for engaging the pedestal members at a substantial distance below the table-top, and latch-stops on the pedestal members respectively; a lever having its fulcrum carried by said upper structure; a link connecting it to the latching devices for forcing the same into engagement with the latch-stops; means for rocking the lever over its fulcrum to effect such engagement, and astop for limitingits rocking movement when the pivot of the link thereto has passed beyond the line from the other pivot of the link to the fulcrum.
2. In a pedestal extension-table having an element extending downward from the extension devices within the pedestal, a latching device pivoted on such element; latch-stops on the pedestal members respectively a lever fulcrumed at the top of said element; a link connecting it with the latching device; means for rocking the lever over its fulcrum and a stop for limiting its rocking movement when the pivot of the link thereto has passed beyond the line from the other pivot of the link to the lever-fulcrum.
3. In a'pedestal extension-table, in combination with the upper structure comprising the separable table members and extensionslides which connect them; the pedestal members pertaining to said separable members respectively; latching devices carried by said upper structure adapted for engaging the pedestal members at a substantial distance below the table-top, and latch-housings on the pedestal members respectively for such engagement; a lever having its fulcrum carried by said upper structure; a link connecting it to the latching devices; a slide-bar on one of the table members adapted by endwise movement to rock the lever to actuate the latching devices to position for entering the latch-stop, said bar having a delay-surface for holding the lever at such position during further end- Wise movement of thebar While the latching devices thus enter, and having back of the delay-surface a notch to engage the lever;
means for causing one of said parts to react to efiect such engagement when the delaysurface is passed, whereby the retraction of the slide-bar rocks the lever'back to force the latching devices into engagement with the latch-stop.
4. In a pedestal extension-table, in combination with the upper structure comprising the separable table members and extensionslides which connect them; the pedestal members pertaining to said separable members respectively; latching devices carried by said upper structure adapted for engaging the pedestal members at a substantial distance below the table-top, and latch-stops on the pedestal members respectively for such engagement; a lever having its fulcrum carried by said upper structure; a link connecting it to the latching devices for operating the same to force them into and take them out of engagement with the latch-stops respectively, a slide-bar on one of the table members having a shoulder in position adapted to engage said lever by movement in one direction when the members are near together, for rocking the lever away from horizontal position to force the latches to locked position, and having a second shoulderfacing the first which encounters the lever when the bar is moved in the opposite direction and rocks the lever back toward horizontal position to disengage the latches from the housings, the notch or interval between said shoulders being in position and extent to be traversed by the lever while the latch is passing over the edge of the latch-stop; whereby the lever is prevented from engaging the first shoulder after being actuated by the second for disengagement of the latches.
5. In a pedestal extension-table having an element extending downward from the extension devices within the pedestal; a latching device pivoted on such element; latch-stops on the pedestal members respectively; a lever fulcrumed at the top of said element; a link connecting it with the latching device; a slide-bar mounted on one of the table members adapted to encounter the lever when the bar is moved endwise in one direction and rock said lever toward horizontal position to tilt the latch to position for entering the latchstops, and having a delay-surface by which the lever is held in position to retain the latches in entering position during further closing movement of the pedestal members, and a shoulder back of said delay-surface for engagement of the bar with the lever, and means causing one of said parts to react to efiect such engagement when the delay-surface is passed, the bar being adapted to be retracted with respect to the table member on which it is mounted after such engagement to rock the lever away from horizontal position to force the latching devices into engagement with the latch-stops.
6. In a pedestal extension-table having an element extending down from the extension devices within the pedestal, a latching device pivoted on such element; latch-stops on the pedestal members respectively; a lever fulcrumed at the top of said element; a link connecting it with the latching device; a slidebar mounted on one of the table members adapted to be moved endwise thereon and carried endwise therewith as the table is closed up and extended, said lever having a notch in which the lever is engaged when the pedestal members are closed together, whereby the forward endwise movement of the bar causes one shoulder of said notch to engage the lever and rock it toward horizontal position for disengaging the latch from the stops, the other shoulder of the notch being of less extent and the bar being adapted to be further thrust in the same direction while the table member on which it is carried is moved in the opposite direction to extend thetable, and a stop limiting such thrust of the bar at the position at which the latch is passing the edge of the stop; whereby the lever passes the notch and is prevented from engaging with the opposite shoulder while the latch is thus restrained on the edge of the stop.
7. In a pedestal extension-table having an element extending down from the extension devices within the pedestal, in combination with latching devices on said element and stops for engaging them on the pedestal parts respectively, means for operating the latching devices comprising the lever, 15, and the links connecting it to the latching devices, the slide-bar having the notch, 21, with its inner and outer shoulders of different extent and the delay-surface beyond the outer shoulder, the lever, 33, fulcrumed on the table member which carries the slide-bar, and pivotally connected to the latter at one side of its fulcrum, and havingone handle at the opposite side of said fulcrum and another at the opposite side of said pivotal connection, and a stop limiting the endwise thrust movement of the bar on the table member.
8. In a pedestal extension-table having an element extending down from the extension devices within the pedestal; a latching device pivoted on said element within the pedestal; latch-stops on the pedestal members respectively, having their latch-engaging lips provided with inclined inner faces for the track of the latch moving into engagement with the stops; and means extending from the latch to one end of said element on which the latch is pivoted for forcing the latch along said inclined faces into such engagement.
9. In a pedestal extension-table having an element extending downward from the extension devices within the pedestal; a latching device pivoted on such element; latch-stops on the pedestal members respectively; means extending to one end of said element for operating the latch to withdraw it from engagement with the stops, the latch having inclined pilot-noses to guide it into engagement with the stops.
10. In a pedestal extension-table, in combination with the upper structure comprising separable table members and the extensionslides which connect them, the pedestal members pertaining to said separable members respectively; latching mechanism carried by said upper structure for connecting the pedestal members ata substantial distance below the table-top, comprising two pairsof latches having fulcrum-support depending from the extension-slides, one latch of each pair at each side of the center of the pedestal, the
latches of one pair extending to one pedestal member and those of the other pair to the other pedestal member, and latch-stops on the pedestal members for said latches respectively.
11. In a pedestal extension-table having an element extending downward from the extension devices Within the pedestal, two pairs of latches pivoted on such element, the latches of one pair extending toward one pedestal member and those of the other pair toward the other pedestal member, and latch-stops on the pedestal members respectively for engagement of the latches; a link connecting the latches upwardly and means at the upper part of said element on which the latches are pivoted for actuating the link to operate the latches.
12. In apedestal extension-table having an element extending downward from the extension devices within the pedestal, devices for locking together the two pedestal members comprising two pairs of latches,all four latches being pivoted to said element, those of one pair for engagement With one pedestal member and those of the other pair for engagement with the other pedestal member; latchstops on the pe estal members for such engagement, the pivots of the latches to said element being at the opposite side of said element from the pedestal members which the latches respectively engage; a reciprocating rod extending within the said element, having a cross-head emerging therefrom for engaging the latches between their pivots; and means at the upper end of the latch-supporting element for actuating said rod to engage and disengage the latches.
13. In a pedestal extension-table, in combination with the separable members, the extension-slides connecting them and the pedestal members pertaining to said separable members respectively, the center leg carried by the extension-slides and extending within the pedestal members when the latter are closed; a sleeve secured on the center leg and having two pairs of pivot-studs projecting from it, two pairs of latches pivoted upon said studs respectively, those of each pair extending from the pivot-stud past the center leg toward the opposite pedestal member; latch-stops upon the pedestal members for the engagement of said latches respectively; and means connected with the latches between the two pivot-studs at each side and extending thence upward to the top of the leg for operating the latches.
14. In a pedestal extension-table, in combination with the separable members, extension-slides connecting them and the pedestal members pertaining to the separable members respectively, the center leg carried by the extension-slides and extending within the pedestal when its members are closed up; two pairs of latches pivoted to said center leg, those of one pair for engagement with one pedestal member and those of the other pair for engagement with the other pedestal member, the pivots of the latches being at the opposite side of the center leg from the pedestal member which they engage; latch-stops on the pedestal members for such engagement, and connections for operating the latches engaging the same at the opposite sides of the center leg between the pivots and extending thence up to the upper end of the center leg; and means at the upper end of the center leg for actuating such connections to operate the latches.
15. In a pedestal extension-table, in combination with the extension devices and an element extending downward therefrom, two pairs of latches pivoted on said element at opposite sides thereof and at a substantial distance below the table-top, the latches of each pair extending parallel with each other from their pivots past the center of the pedestal toward the pedestal member at the opposite side; a link guided at the lower end on said latch-supporting element, and having loose pivotal connection atone side with one latch of each pair, and at the other side with the other latches, and means at the upper end of said latch-supporting element connected to the link to operate the latches.
16. In a pedestal extension-table in combination with the extension devices and a latchsupporting element extending downward therefrom; the hooked latching devices pivotally mounted on said element; latch-stops on the pedestal members respectively for engagement by the hooks of said latches to draw and lock the table parts together; a lever fulcrumed at the upper end of the center leg; a link connecting said lever with the latching devices whereby the rocking of the lever over its fulcrum operates said devices; means causing the latch to stand normally at position requiring deflection in one direction for entering into engagement with the latchstops and in the other direction for drawing the pedestal members together after suchengagement is effected; the normal position of the rocking lever corresponding to such normal position of the latch, being intermediate horizontal and vertical; a slidebar on the table-top adapted to encounter said lever at said intermediate position as the pedestal members are brought together, and by such encounter to rock the lever and deflect the latch in direction for entering into engagement with the latch-stops, said lever having a notch for engagement with the lever when the latches have thus entered; the wall of the notch remote from the lever-encountering end of the slide-bar being extended down farther than said encountering end to rock the lever down for disengaging the latch, and means for operating the slide-bar.
In testimony whereof I have hereunto set my hand, in the presence of two witnesses, this 12th day of May, A. D. 1902.
EMIL TYDEN.
In presence of- FRED W. STEBBINS, KITTIE F. CLARKE.
US10966002A 1902-05-31 1902-05-31 Pedestal-extension-table locking device. Expired - Lifetime US722468A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10966002A US722468A (en) 1902-05-31 1902-05-31 Pedestal-extension-table locking device.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10966002A US722468A (en) 1902-05-31 1902-05-31 Pedestal-extension-table locking device.

Publications (1)

Publication Number Publication Date
US722468A true US722468A (en) 1903-03-10

Family

ID=2790983

Family Applications (1)

Application Number Title Priority Date Filing Date
US10966002A Expired - Lifetime US722468A (en) 1902-05-31 1902-05-31 Pedestal-extension-table locking device.

Country Status (1)

Country Link
US (1) US722468A (en)

Similar Documents

Publication Publication Date Title
US722468A (en) Pedestal-extension-table locking device.
US681155A (en) Locking device.
US1009902A (en) Locking and opening device for extension-tables.
US1024566A (en) Coupling device or clasp.
US106970A (en) Improvement in desk
US1943099A (en) Locking device
US733367A (en) Pedestal-table lock.
US1113192A (en) Pedal-operated lock for extension-tables.
US892131A (en) Pedestal-extension-table lock.
US747132A (en) Pedestal-extension-table lock.
US860709A (en) Pedestal-table lock.
US747131A (en) Pedestal-extension-table lock.
US786070A (en) Pedestal-table locking device.
US707186A (en) Pedestal-extension-table lock.
US655150A (en) Satchel-fastening.
US625173A (en) Extension-table
US2688526A (en) Desk drawer stop
US1076174A (en) Extension-table lock.
US773691A (en) Pedestal-table lock.
US754196A (en) Pedestal-table lock.
US1004220A (en) Extension-table.
US788572A (en) Automatic railway-switch.
US405252A (en) Clement engel
US848233A (en) Extension-table.
US92365A (en) Improved railway-car coupling