US1391092A - Flexible-shaft guard - Google Patents

Description

C. H. BEACH.

FLEXIBLE SHAFT GUARD.

AIPUCATION FILED JULY 7. 19x9.

PatentedSept. 20, 1921.

shaft.

rnnxmnn smr GUARD.

CHESTER H. BEACH, OF RACINE, WISCONSIN, ASSIGNOBTO MOORE ELECTRIC RATION, OF CHICAGO, ILLINOIS, A COBPORATIOllT DELAWARE.

I Specification of Letters li'atent.

7 UNITED-STATES 'P'AT'ENr' oFFlcE.

Patented Se t;- 20,- 1921.

Application fil ed m t'z, 1919. ,Serial no." 309,128.

I 1 I0 all whom it concern;

Be it known that I, CHESTER H. Bnaon, a citizen of the United States, and aresident of the city of Racine, county of Racine, and

State of Wisconsin, have invented certain new' and useful Improvements inv Flexible- Shaft Guards, of which the following is a specification.

guards for flexible shafts and has for its object the provision of a guard adapted toprotect the projecting end of a flexible rotating Other objects will appear hereinafter. I The invention consists in the combinations and arrangements of parts hereinafter described and claimed. 1 The invention will bebest understood by reference to the accompanying drawings forming a part of this specification, and 1n which, 1

Figure 1 isla perspective view of a flexible shaft embodying my invention, secured to a pair of clippers, parts being in section.

Fig. 2 is a' perspective view of my inven tion with a part-removed.

'portion which is The approved form of construction, as

My invention relates to improvements in 11 is beveled so as to adapt same for'more ready and easy insertion into the handle 15.

, The form of constructionof devices of this class which are now customarily used, embracesa metallic tip similar 'to the tip 11,] with the exception that'the enlarged o ening 17 is not provided therein, andv with t e further distinction that the tip 11 terminates immediately below the groove 12, thereby allowing the end of the shaft 4 which cooperates with the driving shaft 6, to project tion; the'end of the flexible shaft 4, which beyond the tip 11. In this form of construc- 1 is provided with a shoulder 9, is unprotected by any sort of casing. Inasmuch as this shaft 4 (revolves ata high'speed, it is a source of great danger and inconvenience illustrated'in the drawings, comprises a flexible shaft 4, which is intended primarily to be used in connection with a pair of clippers 5. A driving shaft 6 is mounted upon the clippers 5, one end of said driving shaft 6 havin an enlarged" cylindrical tubular rovided with. an elongated slot -8. Provided upon one end ofv the shaft 4 is a laterally projecting shoulder 9, which in operation is adapted to engage in the slot .8 of the driving shaft 6. The flexible shaft 4 is inclosed bya flexible sheath' 10, one end of which is provided with a cylindricalmetallic' tip 11 having a groove -The tip ll is designed to fit a bearing 16 which is provided in the handle 15 of the clippers 5. A suitable pin "13 actuated by a compression spring seated in a slot 14 which is provided in the handle 15, is adapted to engage in the groove 12 and securely lock the tip 11 in position. As will be noticed, the tip 11 is provided at its lower end with an enlarged tu ular o ening or bearing to the operator when unprotected, owing to the fact that it is liable to catch in the clothing or the hair. The shaft would also gather up lint and small particles of thread, which would interfere wlth the eflicient operation of the device. Furthermore, the shaft 4, when thrust into the handle of the clippers with'which used, isjgenerally revolving, and

consequently, when itv comes into, contact with; the surface of the handle of the clippers,'will generally mar the handle, chipping -o1f the nickel or the coating. of the same. -These difliculties are eliminated by prolong ing the tip 11 and extending it so as to incase throughout the entire length the flexible shaft 4. A further advantage is thattheprolonged portion of the tip 11 affordsa bearing for the end of the shaft 6 which 17. This bearing is provi ed for the reception of the enlarged end of the shaft 6,

. which cooperates with the shaft 4." It is also to be noticed that the end 18'of the tip engages the flexible shaft 4, as clearly shown in Flg. 1. The shaft 6 on this account is plrtpvide'dwith three bearings instead of two. e lateral motion of the. same is reduced to a mim'mum,.adding efliciency and durability to the entire device. i Y While I have illustrated and described the preferred form of construction for carrying my invention into effect, this is capable 'of variation and modification without de-;

parting from the spirit of the invention. I,

therefore, do not wish tobe' limited'to the recise details of the construction set forth, but desire to avail myself of such variations and'modifications as comewithin the scope of the appended claim. 1

Having described my invention, what I claim as new and desire to-secure by Letters Patent, is: i I

The combination with hair clippers consisting pf a casing having an operating shaft In testimony whereof I have signed my 10 thereln, there being a bearing in said casing name to this specification in the presence of surrounding said shaft, 0f a flexible shaft two subscribing witnesses. inclosed in a sheath, said sheath being provided with a tubular tip surrounding the end CHESTER. H. BEACH.

of said flexible shaft, said tip fitting the' I bearing in said casing and-theshaft in said Witnesses:

casing fitting-within and having a'bearing L. H. HAMILTON,

in saidtip, substantially as described. 1 a L I. PEAsE.

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