By way of summary, the present invention cont•。m- plates a nov•l method of grooving a hoisting drum of any suitable type wherein a “master cylinder” may be utilized to provide a variety of counterbalanced grooving systems。 The “master cylinder” comprises a sleeve which may be machined in any well i:nowt manner to provide a plu- rality of para11。•l yooves on the outer periphery ‘thereof。
Tbis type of machining operation is well known, and may d0
be accomplished by the usual lathe, milling machine, or
the likc, thus eliminating the necessity of: specially de- signed adapters in the construction of the grooved sleeve。 The parallel grooved sleeve niay tIi•n be cut or slit to provide a plurality of arcuate sections or segau•-nts, and portions or the segments may be re-in。anged and welded or bolted, or th• lit:e, to the outer periphery of a drum cGre in order to provide a continuous helical and parallel groove thereon。 The same method of grooving may be
utilized to provide substantially any continuous combined 60
helical and parallel groove on a drum, with only the cut-
ting of tbe sleeve differing in accordance with the par- ticular grooving design desired。
Fro:n the foregoing, it will be apparent that tn"e present invention provides a nov»•1 method for groo•/ing a spool- 65
ing drum, or the like, in a manner utilizing conventional
machining devices, and greatly reduces the cost and ti。me of manufacture of counterbalanced grooving on the drum。
A variety of: the types of continuous circumferential grooves comprising comliined helical and straight or paral- 70 lel portions may be provided 。on a drum core by using a
“master cylinder” or parallel grooved drum。 The novel grooving method is simple and efficient in operation and economical and durable in construction。
Whereas, the present invention has been described in
particular relation to the drawings attached hereto, it shoald be understood that other and funher modifica- tions, apart from those shown or suggested herein, may 'be made within the spirit and scope of this invention。
What is claimed is:
1。A method of providing a continuous oircumferen- tial groove having alternate helical and parallel sections on a drum core, and consisting of providing a plurality of grooves on the outer periphery of a sleeve, severing the yooved Sleeve into a plurality of segments, and in- terchanging certain pairs of the shivered segments and securing the interchanged pairs and the remaining seg- ments on tire outer periphery o:I the drum core to pro- vide the continuous alternate helical and parallel circum- ferential groo-ze。
2。A method of pro•/iding a continuous circuinferen- tial groove having alternate helical and parallel sections on a diam core, and consisting of providing a plurality of parallel grooves on the outer periphery of a sleeve, severing the parallel grooved sleeve into a plurality of segments, intei chan%ng certain of the seveied se,•ments, and secaring the int-•rchanged and remaining segments on the outer periphery of the dixim core to provide bh-• continuous a1terno。te helical and para11e1 circuit。ferential groove, and securing the segments to the drum core。 开槽电缆线筒体的方法英文文献和中文翻译(9):http://www.youerw.com/fanyi/lunwen_100039.html