US1762460A - Window - Google Patents

Description

` June 10,y 1930. E. w. ABRAHAMSON WINDOW Filed DBC. 5, 1927 5 Sheets-5h66?. l

June 10, 1930. E 'w. ABRAHAMSON 1,762,460

WINDOW Filed Dec. 5, 1927 5 Sheets-Sheet 2 6M MM Mg.

amg 5 E. W. ABRAHAMSON June 10, 1930.

WI NDOW Filed Dec. 5. 1927 5 Sheets-Sheet 4 M Mad/amsn June 10, 1.930. E. w. AEcFeAl-lA/xsohl` WINDOW Filed Deo. 5, 1927 5 Sheets-Sheet 1:' il. .v

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mucus j Patented lune 10, 193i) Nth/itil unirse i STATES PATENT EDWIN WILLIAM ABRAEAMSON, F BUFFALO, NEW YORK, ASSIGNOR TO TWIN-FLEX EJIETAL MANUFACTURNG CURPORATIDIT, 0F` BUFFALG, NEWYORK, A COBPURA- TON F NEVI YORK VVINIDOV` Application led December 5, i927. Serial No. 237,738.

This invention relates to a Window, and more particularly to a Window in which the principal parts are constructed of sheet metal.

i One oi the objects ofthis invention is to provide a Window in Which the frame has an integral Wind break which upon being bui-lt into the Wall of a buildingby masonry or the lileoperates not only to effectively prevent the wind and Weather from entering between the i'ralne `and Wall but also strengthens and stili'ens the traine and si1npliiics and cheapens the construction.

Another object of this invention is to pro* vide a Window iranie Vin which the face plates ot the jambs are readily removable tor convenience of assembly and repairs and also to aiiord easy access to the boxes formed by the jambs for taking care o'l' the sash weights and other parts contained therein.

Another object of this invention is to proide sash hanging bars or runners on the jamhs tor guiding the sliding sash which are rigid and Weather tight and which will 2.5 maintain the sas ies parallel With the frame While in a normal position and still permit the'sashes to be reversed freely and easily.

\ Another object otthis invention is to pro* i vide improved parting ustrips or stops be- 30, tween the ruimere or hanging bars for the upper and lower sashes which strips in cooperation with the runner bars form a Weather tight joint and still permit the sashes 'to be raised and lowered freely.

A further object of the invention is to improve the joint between the sill of the Window frame and the lower sash when the latiter is closed so as to strengthen and cheapen the saine and also render the saine Weather tight when closed and permit the discharge to the exterior ot any Water which may enter the joint.

A still further object of this invention. is to so construct the head of the same so that the face plate oit' the saine is removable and thesash lines and guide pulleys are easily accessible for inspection, adjustment and repairing.

This invention has the added object of so "0 organizing the sash balancing mechanism that one weight serves to support both sides ofthe same sash and thus simplifies the construction, lessens the cost and reduces the liability of getting out of. order.

In the accompanying drawings:

Figure l is a perspective view ot a window embodying my improvements showing the sashes in an open position and one of the jambs partly broken away. Figure 2 is horizontal section talicn on line 23m?. l. Figure 3 is a perspective vieiv showing jiarts of the mechanism for balancing the snshes.

-Figure lLis a fragmentary vertical section,

on an enlarged scale, taken on line imi, Fig. l. Figures 5, 6 and 7 are fragmentary horizontal sections, on an enlarged. scale.Y taken on the correspondingly number u lines in Fig. l. Figure 8 a ,ginentary vertical section, on an enlarged scale, tellen on line S-8, Fig. 7. Figure 9 is a frag inentary horizontal section taken on lino 9 9, Fig. 8, and showing the pivotal connection and clamping means between one edge of a sash and the adjacent runner bar on an enlarged scale.

Similar characters of reference indicato like parts in several views oil` the` drawings.

The frame oi' the window in 'the present instance is shown as mounted Within the opening of alivall l0 which is constructed oi: masonry but it is to be understood that this frame may be mounted in a wall constructed of Wood or other material. The general ele` ments of the frame consist ot two upright jambs l17 ll, a horizontal sill l2 connected at its opposite ends With the lovver ends of thejainbs, and a horizontal head 13 connected, at its opposite ends with the upper ends of the jambe, each of said members being constructed mainly oi a single sheet ot' metal. Flach `of the jambs .is set in a recess le in one side of the Wall opening and comprises an upright rear plate l5, inner and outer side plates 16, l?, and a front "face plato composed of a fixed outer section .18. and a removable inner section ll. The inner side plate 16 is connected directly with 'the adjacent inner edgcot the rear plato 'l5 and is provided at its iront edge with a laterally proj ecting flange 19 which fits against [lll lll)

the adjacent part ofthe wall. The outer side 17 of the jamb is connected at its rear end with the outer' end of the rear plate 15 by a bead or 1in 20 projecting backwardly into slit 21 in the wall and formed by reversely bending or doubling the sheetof metal from which the jamb is formed at the rear outer corner ofthe same so thatv tween the jaznb of the window frame and the wall opening which operates to prevent- `or check any weather from driving into building from the exteriorl in case the window frame should be imperfectly set when erected'or the joint between the frame and wall should become loose from any cause, thereby avoiding the objectionable results which otherwise would` follow thev entrance of rain, snow, wind or dust into the building at this point. Moreover, this bead strengthens the frame and ybeing made integrally .with the amb-does not appreciably add to the cost of the same. Y. The fixed outer section 18 of the face plate of the jainb eX- tends inwardlyy from the front edge of the outer plate 17 across the front half of the jarnb and is stepped so as to form a rabbet 23 constituting partof an outer runway and an outer stop onshoulder 2li and an inner rabbet 25 forming part of a channel shaped seat which is adapted to receive a parting strip or stop arranged between the runways for the upper `and lower sashes as will be hereinafter described. rlhe removable section 181 of the jamb face plate is made from a sheet of metal which is bent so that its front side is step shaped and forms an inner rabbet 26 constituting partof an inner upright runway, an inner stop or shoulder 27, and an outer rabbet 28 constituting part of the seat for said parting strip; A hollow sheet metal jamb f is thus formed which serves asv a box for a vertically movable weight constitutingpart of the sash balancing mechanism.

Arranged within the hollow jamb are one or'niore horizontal metal braces 29 eachk of which is connected at itsV outer end with the rear side of therxed section 18 of the jamb face plate and its inner end with the inner side of the inner side plate 16 ofthe jamb, the connections'between these members being preferably effected by electric welding or thev like. The central part of each of these braces is spaced apart from the rear sides of the {iX-ed and movable sections of the jamb face plate and atfits inner end edge of the inner j amb face plate section 181 laps the'rear side of the inner edge portion Vof the outer face plate section 18, and the saine is also provided with a reversely bent party or fold 32 which terminates in an inclined bearing lip 33 which projects inwardly and rearwardly and enga-ges with the front side of the braces 29, thereby holding the outer edge of the inner jamb face plate section in position relative to the inner edge of the 'outer section of the jamb face plate and also facilitating vassemblage of the same. The removable faceplate section 181 is removably held in place by screws 34 passing through this plate and the braces 29 and bearing Vwith their heads against the outer'sides of thisplate adjacent to the inner stop 29 and having the:1 threaded ends engaging threaded openings in the braces.'

The parting strip or stop Vis constructed of a single piece of sheet metal to form a hollow channel bar the front ,side of which is flush with the outer and inner stops 24 and 27 and the rear edges of which are spaced apart and project rearwardly against .the front side of the rabbeted inner part 25 of the outer face plate section 18, as shown in Fig. 5, and thereby forming with the stops 2&1, 27,' outer and inner upright runways for-the upper and lower mountings. The outer andV inner rear c ners of the parting strip 35 are provided with rabbets 36, 37, respectively, for use `in forming a weather tight joint between the upper and lower sash mountings and the jainb, as will presently appear. `The overlapping inneredge of. the outer face plato section and the outer edge of the inner face plate section having the reversely bent *aart 32 are detachably connected by screws 38 passing through the same at diil'erent Joints in their length. Y

In the vertical runways on the face of 'the jamb are arrangedfrunners or hanging bars which slide vertically therein and forni part of the mounting for supporting the seshcs at the respective vergical edges thereof. Each of these hanging bars or runnersV is constructedv of sheet metal and provider. with an upright front plate 39and two side plates 10, 11, projecting` rearwardly opposite edges of the frontplate engaging respectively with one side of v,ie parting strip and the inner side of the conipanion stop 18 or 181011 the jamb. The

side plate 40 ot the hanging strip next to a stop 18 or 181 on the jaiub is provided on its rear edge with an inturned tlange -l and the companion side plate il extends rearwardly through a slot between the parting stop and the jamb face plate and provided at its rear edee with a laterally projecting thinge i3 whichis arranged in a vertical channel Iii termed between the rabbet 36 or 37 at a rear corner of the parting strip and the adjacent part of the depressed seat on the central part of the opposing face plate of the jainb. By ineans ot this angular' extension on the hanging strip the latter is free to `slide vertically on the 'anib but is held against inovenient avian l O J troni the jainb and the driving oi weather through the joint between the janib and hanging strip is also checked.

Each ot the hanging bars is provided on its iront side or bridge with a vertical channel `5() which is formed by pressing the iront plate of this bar baclrwardly between the sides thereofi the rear side of this channel being connected about midway oit p its height with the side plates oit this hang-` ing bar by a transverse brace 5i `which is connected with this channel and these .side plates by electric welding or otherwise. cured to the front face of each hanging bar byelectric welding and extending arross `the open sido of the channel :EO is a tace plate 522 which is lpreferably coextensive with the tace ci the respective hanging bar and practically forins a part thereof.

Upon the outer hanging bars or runners mounted an outer orupper sash and upon the inner hanging bars or runners is mounted an inner or lower sash. HaceA oi these sashes has two upright side bars or stiies i-:ii which are pivotally inouiited on one pair oiu corresponding hanging bars. ri he upper sash has a top rail 4.6 connecting the stiles oi. this sash and cooperating with the head oi the `trarne and a lower meeting rail connecting the lower ends of these stiles and the lower sash has an upper inceting rail i8 cooperating with the meeting rail oit theupper sash and connecting the upper ends ot the Stiles of the lower sash and lower rail i9 `cooperating with the sillot the traine and connecting the lower ends of the stiles of the lower sash. Each ot the stiles of the upper and lower sashes is of tubular forni and made of sheet nietal which is bent to forni inner and outer plates 53, 5% connected on their front edges by a turn 55, a` laterally projecting tlange 56 on the rear edge of the outer plate 53, a laterally projecting iiange on the rear edge of the inner plate 54, and tace plate 58 folded bach from the inner edge of the iiange 56 and connected at its outer edge with the flange 56 by welding or otherwise, as shown in Fig. 5. On its inner side the inner plate oit' each stile is provided with a rabbet 59 forming a seat for the adjacent edge of the glass pane GO oi the respective sash, said pane being bedded in cement (il and held in place by means which include a retaining strip 62 engaging with the inner side of the inner plate of the stile and the adjacent edge portion of the glass pane and detachably connected with the inner plate oi this stile by screws 63.

Each of the stiles of a sash engages its face plate 58 with the face plate 52 of the adjacent hanging bar and is pivotally and frictionally connected therewith by means which are preferably constructed as follows:

The numeral Gil represents the shank of a pivot bolt which passes horizontally through the tace plates 58 and 52 of the cooperating stile and hanging bar and also through the bottoni of the channel and the internal brace 5l on the central part ,t the saine provided with a screw nut 65 at its rear end which bears against the rear side of the brace 51 and having a head 66 at its front end which is arranged in openings 67, GS formed in the front plate of the stilo and the adjacent part of the retaining strip and bearing through a washer `(59 against the front side of the stile flange 57, as best shown in Figs. 7, 8 and 9. i

Arranefed within the central part of the channel o0 on the hanging bar is a. datent bar preferably of channel torni which projects througha vertical slot 7l into engagement with the face plate 58 ot the respective stile. The detent bar and stile are tirinly pressed together so as to maintain a irictional engagement between the saine at all times by a spring means consisting pre ferably of a bow shaped leai1 spring 72 the central part of which has a hole T3 for the reception of the pivot bolt Gil and bears against the bottoni oi the channel 50 whilel the opposite ends of this spring bear against the rear side ot the detent bar adjacent to opposite `ends thereof.

By these means of mounting each sash the saine can be opened and closed by raising and lowering the saine with its hangL ing bar while parallelwith the latter durw ing which time the hanging bars slide vertically in the respective runways of the jamos and the sash is also capable of being turned about a horizontal axis on the pivot bolts 6a for controlling the direction in which the air enters the rooin and also for reversing the sash so as to permit both sides of the glass pane to be cleaned from the inside of the building and thus avoid the hazard attending cleaning the windows from the exterior oi the building. The detent bars bear against the Stiles with SeiteV cient pressure to produce the requisite trietion for holding the sash at whatever angle the same may be adjusted. These means ofV mounting the sash are strong and durable, the sarne are not liable to get out Vof Order and the several parts can be readily assembled and taken apart for inspection, adjustment and repairs. Y

For the purpose of arresting the rotary movement of each sash on its hanging bars when the sash reaches a position parallel or flush with the hanging bars each of the hanging bars has itsiface plate provided on diagonally opposite parts of its longitudinal edges relative to its axis of rotation with an upper outer stop hook 74, and a lower inner stop hook 7 5. In the closed position ofthe sash each upper center stop hook 74 receives the outer edges of the outer flange 56 and the face plate 58 of the rcspective stile, as shown in Fig. 6, and each of the inner lower stop hooks 75 receives the inner edges of the flange 57 and the face plate 58 of the respective stile, as shown in Figs. 5 and 6, thereby not onlyT stopping the sash when swung shut but also aiding in producing a weather tight joint between the sashes and the hanging strips.

The head 13 of the frame is also made principally of sheet metal in the form of va hollow box which is secured in a lrecess 76 in the wall above the window opening and comprises a horizontal top plate 77, outer and inner vertical side plates 78, 79 projecting downwardly from the outer and inner edges of the top plate, an outer stop 80 formed by reversely bending the lower edge ofthe outer plate inwardly and upwardly, a laterally projecting ilange 81 arranged at the lower end of the inner plate 79 and engaging ywith the adjacent part of the wall, and a removable bottom plate V82, an inner stop 83 formed by reversely bending the inner edge of the bottom plate downwardly, inwardly and upwardly, an intermediate stop 84 formed on the central part of the bottom plate by bending apart of this plate downwardly, and a weather sealing channel 85 opening downwardly and formed on the bottom plate by forming an upwardly bent head on said bottom adjacent to the outer side ofsaid intermediate stop At its outer edge the bottom plate is provided with an upwardly projecting flange 86 which engages with a downward- Vly opening hook 87 formed on the inner edge of the outer `stop 80. Within the hollow head of the frame are arranged transverse braces 88 each of which is connected at its ends by electric welding or otherwise with the inner side of the side plates 78, 79, of the head for the purpose of hold- .ing the same in place. The inner ends of these braces are provided with hoolrs 89 forming seats which are removably engaged by the inner edge 90 of the inner stop 83 of the bottom plate 82.y The latter is secured in its operative position with its eX- treme outer and inner edge portions 86, 90, in engagement withv the seats 87, 89 by a screw 91 connecting the central parts of the bottom plate lwith the corresponding part of the brace, as shown in Fig.' 4.

The top rail 46 of the upper sash cooperates-with the head of the frame lto form a weather tight oint or contact therewith when the window is closed and in its preferred form this top rail is made hollow or tubular of sheet metal and provided with angular outer and inner plates 92, 93, a top plate 94 connected at one edge with the outer edge of the outer side plate 92 and provided at its inner edge with a laterally projecting flange V95 which is secured by welding or otherwise to the laterally projecting edge portion 96 of the inner plate 93 and forms therewith a rib which'enters the channel 85 of the frame head in tl e closed position of the upper sash and thereby forms a joint therewith whereby weather is prevented from driving through this part of the window. The inner part of the top rail is provided with a rabbet 97 against which the adjacent edge portion of the window pane is held by a retaining strip 98 connected by screws 99 withvthe adjacent part of the top rail, as shown in Fig. 4.

The sill 12 of the frame is fitted in a rabbet 100 formed in the wall at the lower end of the window opening and is made hollow of sheet metal so as to form a top having an inclined outer/part 101 and a level inner part 102 which latter extends partly underneath a window stool 103, inner and outer vertical plates 104, 105 projecting downwardly from the inner and outer' edges of the sill top and resting on the wall, and transverse braces 106 arranged' within the hollow sill and connected at opposite ends with the inner and outer side plates thereof, as shown in Fig. 4. Frojecting upwardly from the sill and preferably from a point in line with the junction of the inclined and level parts of the sill top is a weather rib or head 107 which is preferably formed by .doubling or plaiting the adjacent part of the sill top. This rib is spaced outwardly from the outer end of the Window stool so as to form an upwardly yopening recess between the same.

The lower rail 49 of the lower sash cooperates with the sill of the frame to form a weather tight joint therewith whenl the lower sash is closed. This rail is also made of sheet metal and of tubular form and comprises inner and outer plates 108, 109 of angular form which are connected at their inner edges, and a bottom plate 110 connected by a laterally projecting doubled part or plait 111 with the lower edge of the inner plate 108 and provided at its outer edge with a downwardly projectingflange 112 which is secured in an upwardly turned hook llt? iso

113 at the lower end of the outer plate 109, as shown in Fig. 4. In the lowered and closed positions of the lower sash the tongue formed by the flange 1121 and the hook shaped part 113 of the outer plate 109 engage with the outer side of the rib and the inner part of the plait 111 overhangs the stool 103 so as to check the passage ot weather through the window at this point. The formation ot a weather tight joint at this place is further promoted by a weather strip ci' sheet metal having a supporting plate 114 secured to the underside of the plait 111 and having its inner and outer edge portions foldedor doubled to form an inner plait and an outer plait said inner plait having a fixed ply 115 which projects downwardly from the inner edge of the sup porting plate 11s and a flexible ply 116 projecting at an incline upwardly from the lower edge of the fixed ply on the inner side ot the same, and said outer plait having an inner fined ply 117 projecting downwardly from the outer edge or" said supporting plate 114 and an outer flexible ply 118 projecting at an angle upwardly from the lower end of the companion fixed ply 117. In the closed position or' the lower sash the inner iiexible ply 115 engages yieldingly with the stool 103 and the outer flexible ply 118 engages yieldingly with the upstanding rib 107, and thereby forms a tight closure between the sash and the sill of the trame. For the purpose et preventing any water from collecting in the recess on the sill between the stool and the rib 107 the latter is provided with a weep hole 119 adjacent to its base through which any water in said recess flows l to the outer inclined top of the sill and escapes. The glass pane 60 of the lower sash engages its lower edge with a rabbet 121 on the innerside of the lower rail and held in place by a retaining strip 122 connected with this rail by screws 123, as shown in 1 The upper and lower meeting rails are each made of sheet metal in the form of tubes and consistof innerand outer side plates A124, 125 connected at their inner ends, and

laterally project- ing flanges 126, 127 arranged at the outer edges of said plates and connected with each other by welding orotherwise. One of the tianges of theupper meeting rail, preferably the upper' one, is provided at its inner edge with an upwardly opening channel 128, and one ofthe flanges of thelower `meeting rail,` preferably the upper one, is

provided at its outeredge with a depending tongue 129 which is adapted in the closed position of the sashes to engage with said channel and thereby form a weather tight joint between the sashes, as shown in Fig. 4.

These meeting rails are provided on their in ner sides with rabbets 130 in which the window panes are held by retaining strips 131 connected with the meeting rails by screws 132. t

Adjacent to opposite ends of the overlap ping parts of the meeting rails, closure blocks 133 are secured to the tace plates ot the `trame jambs in order to lill the space at this j balancing weights which are vertically movable, respectively, in the hollow jambs of Ithe window frame which form weight boxes for this purpose. @ne or" these weights is connected with opposite hanging bars o1 one sash and the other weight is connected with the opposite hanging bars of the other sash so that only one weight is utilized for counterbalancing each sash. In the preferred construction each of these weights is connected at its upper end with the upper ends of the hanging bars of the respective sash by two lines 136, 137 having preferably the form of chains, which lines are suitably guided in the trame. ln the present case the line 136 which connects each weight with the near hanging bar passes around a guide pulley 138 arranged within the upper corner of the traine on the same side the vtraine, thereby providing front and rear stretches of this line which depend on opposite sides of the pulley and connect at their lower ends with the near hanging bar and the res-pcc tive sash weight. The other line 137 which connects with the tar hanging bar passes around a guide pulley 139 arranged adjacent to the pulley 138 and also around another pulley 140 arranged within the frame at the opposite upper corner thereof, so` that this line forms a horizontal upper' stretch extending between the pulleys 139 and 140 and arranged within the head of the trame, and two end stretches depending from these pulleys and arranged within the jambs of the frame and connected, respectively, with the sash weight and the tar hanging bar. The group of pulleys 138, 139 and 140 in each corner of the iframe are arranged obliquely and the angle of Obliquity of one group opposite to but parallel with the other group for thepurpose of permitting the lines et the two sash hanging bars to pass each other and still permit of attaching these linesto the respective weights and hanging bar te ensure proper supporting of the latter and guiding of thelines. Although these guide pulleys may be mounted in any suitable manner, this is preferably accomplished by pivot ally mounting each group of pulleys on a bracket 141 which is secured to the inner side of the jalnb and head of the window frame at one of the vupper corners thereof, as shown, for example, in Figs. l2 and 4.

As a whole -thi'sfwindow is very strong and dur'able and will retain its form under the roughest usage to which the saine may be subjected. t also can be'very easily manipulated tor either raising or lowering the sash or tilting the same into various angles and when closed the saine is weather tightto maximum extent and' thereby permits of economically regulating the. temperature of a jamb provided on its face with averticaly channel seat and stops on opposite sides of said seat, a parting strip secured in said seat andfforniing with said stops vertical runways and provided on its rear corners within said seat with rabbets,vr and sash vhanging bars sliding `in said runways and each provided-with an angular extension which passes between the `parting strip :and the face plate of the jamb and enters a channel formed by said seat and the opposing rabbet on the parting strip.

3. A window comprising a frame having a runway and a runner or hanging bar ormingpart'oi a sash vmounting and slidable lengthwise in said runway and having a front plate, side plates extending rearwardly ieroin the edges of the iront plate, and a channel arranged on the front plate, and a face plate-secured to the front side of said vfrontA plate and extending `across sail channel.

l; A windowcomprising a frame having a runway, a hanging ba'r slidable lengthwise in said runway and having side plates, a Vchannel on its :front part and a face' plate extending Vacross said channel, a sash for supporting av paneV having a tubular stile having aninner plate and an outer and a face plate connecting said inner and outer plates and 'bearing'against the Viace plate ofsaid hanging bar, andy a'retaining strip adapted to engage the pane and secured to said inner plate oi the stile.

5. A windo-w comprising ay frame having` a runway, a hanging bar slidable lengthwise in said runway and having sideplates, a

channel .on its front part and a faceplate extending acrossV saidchannel, a sash for supporting a pane havingk a tubular stile ieefieo `having an inner plate and an outer and a face plate connecting said inner and outer plates `and bearing against the face plate oi" -said hanging bar, and a retaining strip 'adapted to Vengage the pane and securedto said inner plate of the stile.

6. A window having a traine provided with a runway, a hanging barv slidable lengthwise-in said runway and having 'side plates, a iront plate, a channel in said Jfront plate and a face plate secured to thev front side of said Jfront plate Vand having a slot, a sash lor supporting a pane having a stile provided with a face plate engaging with the face plate of thehanging bar, a detent bar arranged in said channel and projecting through said slot into engagement with Ythe tace slate of said stile. means for ieldingly pressing said detent bar against said stile, and means for pivotally connecting said stile and hanging bar;

7. A window having a traine provided with a runway, a hanging bar slidable lengthwise in said runway and having side plates, a front plate, a channel in said iront plate and a 'tace plate secured to the iront side ot said 'iront plate and having a slot, a sash 'for supporting a pane having a stile provided with a face plate engaging with vthe face plate ot the hanging bar, a detent vbar arranged in said channel and projecting through said slot into engagement with the face plate of said stile, a bow leaf spring arranged within said channel and bearing with its central part against the bottom 'of said channel and engaging its ends with the ends of said deteiit bar and a aivot o 1 l 7 I bolt assino throun said tace vilares chana? o l i nei and spring.

8. A window havin@` a traine provided D L with a runway, a hanging bar slidable lengthwisein said runway and having side plates, a front plate', a channel in said front l plate and a tace plate secured to the front side of said iront plate and having slot, a

sash for supporting a pane having a stile arovided with aftace )late enoa ine with the l e e tace plate of the hanging bar, a detentbar arranged in said channel and projecting through said slot into engagement with the vface plate of said stile, a bow leaf spring arranged within said channel and bearing with itscentralfpart against the bottom of said channel and engaging its` ends with the Vends otsaidv detent bar, andV a pivot bolt passing through said face plates, channel and spring, and having a screw nut arranged in rear of the channel and a head arrangedi within the stile.V Y

In testimony whereeie l aliixiny signature.

EDWIN 'WILLAM ABBAHAMSON.

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