Table or cabinet for sewing-machines
US 588798 A
Description (OCR text may contain errors)
'TKUNDTZ 'I'ABLEGR CABINET IOR SEWING MACHINES. No. 588,798. Patented Aug. 2li-,1897.v
ms Nnnms News co. mom-uma., WASHINGTON. n z:v
UNrTED STATES PATENT OFFICE.
TrinoDoR KUNDTZ, or CLEVELAND, omo.
TABLE `OR .CABINET AFOR 4SEl/VING-MACHINES.
SPECIFICATION forming part of Letters Patent No. 588,798, dated August 24, 1897. pplication iiled January 2, 1896. Serial No. 617,694. (No model.)
To all whom, t naz/ con/cern:
Be it 'known that I, vTHEODOR K UimTz, of`
, cabinets or tables for sewing-machines, &c.,
wherein the sewing-machine head or other machine is mounted upon a leaf that in the elevated or operative position of said machine is flush with the top of the table or cabinet and is tiltable downwardly below said top.
The invention consists in certain meritorious and novel features of construction here-v inafter described, and pointed out in the claims.
In the accompanying drawings, Figure I is a top plan of a sewing-machine table or cabi'- net embodying my invention. Portions are broken away and in section in this figure, and the tilting leaf that bears the sewing-machine head is in its elevated position. Fig. II is a rear side elevation of the same. In thisflgure' the sewing-machine head and the leaf supporting it are in solid lines shown in their lower or downwardly-'tilted position, and the lifting-leaf that is employed in elevating the sewing-machine head is in dotted lines shown in two other positions. Fig. III is a vertical section of a portion of the top of the table or cabinet and shows the leaf B in its elevated and horizontal position, and shows also the slides K and P, that are instrumental in supporting said leaf and the latters load, and shows also the operative connection between said slides.
Referring to the drawings, A designates the supportingl frame or stand of the table or cabinet, and a represents the top of said cabinet or table. Top a is provided with a centrally located rectangular opening ci',
Opening a is designed to receive and be closed by the tilting leaf B, that bears the sewing-machine head C or other machine or object. Leaf B at each end is pivoted at b horizontally and longitudinally to top a, and leaf B is consequently capable of tiltingvertically: The sewing-machine head is lowered by tilting said leaf downwardly, and said head is actuated from its lower position into its operative orA elevated position by tilting second dotted position of said leaf in saidfigure. v Said leaf D is designed to lift leaf B and its load from the latters downwardlytilted position, and consequently such connection between said leaves is provided as will render the load-bearing leaf B capable ofbeing lifted by leaf D during the time that the latter is being Vvtilted Vfrom its closing position' into-the 'position wherein it is flush with top a. f
One object of my invention is to provide such lconnection betweenleaves D and B that leaf D will not begin to lift until it is about in a perpendicular position, as shown in the first dotted position in Fig. II, and thereby not only facilitate the elevation of the sewing-machine head, but reduce. the work attached to the elevation of saidhead to a minimum.
My improved operative connection between leaves B and D comprises a chain E, that is securely attached at one end to and at or near the rear edge of leaf D, a short distance from the axis of said leaf. Chain E extends from its point of attachment to leaf D over the lefthand end of the rear portion of the top a of the cabinet or table, and leads over a sheave Cr, arranged longitudinally of said top and supported within a slot a2, formed in said portion of the top, and chain E leads through the aforesaid slot and downwardly from the sheave to and in under a sheave H, that is arranged at right angles to and below sheave G and is xed upon the left-hand end of a horizontally-arranged shaft h, supported from and below the rear portion of top a. Chain IOO E, in the closing position of leaf D, is slack and hangs below sheave II and is attached to the rear side of said sh eave. Another sheave JL is fixed upon the right-hand end of shaft h, and a spiral spring I, that has one of its ends attached at I to the rear side of said sheave h', leads in under and forwardly from the sheave, and has its opposite end attached at I2 to the underside of the top a of the table or cabinet. Said spring counterbalances the sewing-machine head, and thereby facilitates the elevation of said head from its lowered position. Shaft 7L at its central portion has a forwardly-projecting arm 7b2, that extends in under and transversely of the under side of the sewing-machine head and the leaf that carries said head, and lifts said head and leaf from their lower position upon the rearward oscillation of shaft 7L, effected by the required movement of leaf D. Chain Eis slack, while leaf B and the sewing-machine head supported therefrom are in their downwardlytilted position, as already indicated, and the length of said chain and the arrangement of parts are such that the slack in said chain will be taken up and leaf D shall commence to lift when said leaf is about in a perpendicular position, as shown in the first dotted position of said leaf in Fig. Il, so that the work attached to the lifting of the sewing-machine head is reduced to a minimum.
Mechanism instrumental in holdin g the forward portion of leaf B and its load in the elevated position and assisting the aforesaid lifting means in holding the load elevated comprises, preferably, two small plates or slides arranged to slide longitudinally within opposite ends, respectively, of top a'. arranged to move endwise of a mortise a3 in the left-hand end of top a and in under the left-hand end of leaf B. In its normal position this slide K is out of engagement with leaf B and, as shown in Fig. II, protrudes beyond the left-hand edge of top a, and hence leaf D, when it is actuated into line with top a, actuates slide K inwardly in under leaf B, as shown in Fig. I. A forwardly and rearwardly extending and horizontally-swinging and centrally-fulcrumed lever L has its rear end operatively connected with slide K and has its forward end attached to the left-hand end of a link M, arranged horizontally below and longitudinally of the forward portion of top a. The right-hand end of link M is operativel y connected with the central portion of a forwardly and rearwardly extending horizontally-swinginglever O, supported from the right-hand end of top a. Lever O is fulcrumed at its forward end and has its rear end operatively connected with a slide P, that is arranged to slide from within a mortise a4 in the right-hand end of top coin under the righthand end of leaf B, and that, in the normal position of the slide K, is out of engagement with leaf B. Slides K and P coperate, and the arrangement of parts are such, therefore, that when slide K is moved in under the left- Slide K is hand end of leaf B slide P is actuated under the right-hand end of said leaf. The under side of leaf B is preferably cut away somewhat, as at B', where it is engaged by slides K and P in its upwardly-tilted position.
A forwardly and rearwardly extending leafspring J, attached at its rear end at J to the top a within a recess or mortise a in the under side of the left-hand end of said top, has its forward end engaging a shoulder K', formed upon slide K, and acts to retain slides K and P and the mechanism connecting said slides in their inoperative position. Said spring therefore actuates said slides and mechanism into their inoperative position immediately upon closing the lifting-leaf D down over the lowered sewing-machine head.
Slides K and P, the mechanism operatively connecting said slides with each other, the mortises or recesses as, a4', and a5, and the spring .I are, it is believed, sufficiently illustrated in dotted lines, Fig. I, and their operation will be readily understood without further description or illustration.
I would also remark that member h2 does not in the case illustrated directly engage the sewing-machine head ortlie load-bearing leaf, but engages a metallic rod or bar R, that eX- tends in under and longitudinally of said head and is secured at its ends to the under side of leaf B, as shown in Fig. II, and this construction I prefer.
l. In combination with the top of the table or cabinet, which top is provided with a vertical opening a', the load-bearing tilting' leaf B arranged to close said opening in its upwardly-tilted position, and the lifting-,leaf D hinged to the left-hand portion of said top, of an oscillating shaft suitably supported below the rear portion of the top and having an arm or member overlapping the under side of the load-bearing leaf, mechanism arranged to oscillate said shaft and operatively connected with the lifting-leaf, and the arrangement of parts being such that the load-bearing leaf is lowered or elevated according as the lifting-leaf is tilted into the one or the other of its extreme positions, substantially as set forth.
2. The combination with the top of the table or cabinet,which top has a vertical opening therethrough, the suitably-supported tilting load-bearing leaf arranged to close said opening in its upwardly-tilted position, and the lifting-leaf D hinged to the left-hand portion of the top and arranged to close down over the tilting load-bearing leaf in the latters downwardly-tilted position, of an oscillating shaft h suitably supported below the rear portion of said top and having an arm or member h2 extending in under and arranged to lift or carry the load-bearing leaf, the sheave II, the guide-sheave Gr, the chain E, the sheave h and the counterbalancing-spring I, all arranged and operating substantially as shown, for the purpose specified.
3. The combination with the top of the table or cabinet,vvhich top has a vertical opening therethrough and has the mortises or recesses CL3, a4 and a5, and the suitably-supported tilting load-bearing leaf arranged to close said opening in its upwardly-tilted position, of the slides K and P arranged to be capable of movement in under opposite ends, respectively, of the aforesaid leaf, lever mechanism operatively connecting said slides With each other, the actuating-leaf D hinged to thelefthand end of the aforesaid top, the spring J operatively engaging one of said slides vand acting to retain the slides and connecting mechanism in their inoperative position, and the arrangement of parts being such that in their normal position one of said slides shall protrude outside of the top in position to be engaged and actuated by the said hinged leaf and both of the slides shall be operated simultaneously, substantially as set forth.
In testimony whereof I sign this specification, in the presence of two Witnesses, this 31st day of December, 1896.
C. H. DORER, ELLA E. TILDEN.