USRE5335E - Improvement in double-friction couplings - Google Patents

Description

.l. HENDY.

Double Fricfion Couplings.

Reissued March 25, 1873- Jill/z (am-e 3".

any. 44

"snd-spnr-wheel, two pui UNITED STATES PATENT OFFICE.

'J-OSHIUA IIENDY, or sins FRANCISCO, camro'nnu.

- lmpaovem'sur m nouns-FRICTIONeoueuues.

' Specification forming part of Letters Patent No. 26,733, dated 0. tobvr 11, 1659 reissue No. 5,835, dated March 26, 1873.

To an whom it may concern: Be it known that I, J osnus HENDY, of the &ty and county of San Francisco and State of "'Ualifornia, have inventeda new and useful Improvement for a Double Coupling for Shatting, which I call Hendys Double-Friction ble-friction clutch as applied to'saw-millsand Fig. 2 is a sectional drawing longitudinally of the shaft and transversely of the pulley and spur-wheel,-and on an enlarged scale. A represents the shaft. Bis a doublemale coupling tired to the shaft by the key 0. Each end of the coupling B, and B" isju the form of a truncated cone playing, respectiv into the cavities c and d of'the pulley c and; 'nr' wheel D, said pulleyand spur wheel Being loose upon the shaft y'orinstlaadbf, tlie pulley ieys maybe used 011;

two spur-wheels". E is a lever, one on which isattached to the con linkand by it, 'theshaftAma be thrqwn in Iconn'ecticn with? either the pul ey O or the s ur-wheel D, being held perfectly'flrm in :posi on by the friction of the sides of the truncated cones of the coup lin .3 against the sides of the cavities or coni sleeves c or d, as the case ma be. When the pulley is in connection with t e shaft the spur-wheel is loose, and vice ve'rsa or the couplin may be disconnected from both, and the she be in a state of rest. I is thesaw-shatt, on which the saw G is placed. Motion may be communicated to this shaft by an endless belt from anyrflrst moving power passing around the pulley H. There is also a pulley I, on the saw-shaft, around which and around a? pglieyO on the shait A passes anendless l. hen the clutch B is thrown into ear with the nlle 0 then the shaft Ais rota through sai pul ey 0.

An end ess belt, 0, runs from the shaft F.

. around a pulley, f, on a shalt, g, and on this shaft g there is a pinion, i, that takes into the cogs of the wheel D on said shatt A and when the clutch is connected with the cog wheel D.

lows: When the coupling B is disconnected from both the pulley and spur-wheel the carriage will be at rest. When it "is desired to feed the carria the shaft, by means of the coupling B, is rought into connection with the spur-wheel D, and ispropelledin the direction of the saw to back the carriage, the

, shaft is disconnected from the spur-wheel, an d connection is made with the pulley O, which, movingl'in a reverse direction from that of the spur-w by which a backward direction is given to the movement of the carriage. Should the back- "ward motion of the carriage be too fast it is only necessary to shiit the coupling into the spurwheel D sufllciently far to operate as a brake.

Another great advantage-is that if, in feedingup the carriage, the saw, running at itsfull caacity, should come incontact. with a-large ot, the coupling can be 'slacked so that, the

feeding will be done more lightly, and thus. obviate the necessity of slmppingihefipeed of n in the the saw to prevent its beln t obviates the knot and becoming injured.

necessity of employing so many handles or'levers as are in use in all saw-mills, one lever being all that is required to feed the carriage, to slow it, to stop it, to back it. v

It is not on] to saw-mill carriages that this device is app icable. It is nseful wherever a quick reversible movement is required or where the same driving-shaft is to be used to drive machinery in difl'erent parts ofa buildinggalternately. A

ido not e aim a coupling in the shape of a truncated. cone fitting in a cavity or conical sleeve, as theme has been heretofore in use. a I o What I claim, and desire to secnre by Let:

ters Patent,isr a 1. The application of two such truncatedeel, changes the direction of the shaft,

cones to one coupling, one at either end, and 2. The lever E, in ,combination. with the operated bye single lever, so as to work in double-acting friction device, substantially as cavities or conical sleeves'attaehed to pulset forth.-

leys or wheels arranged on one shaft, so that In witness whereof I hereunto set my hand said shaft may be run slow or fast or backand seal.

ward or forward, or entirely stopp without I JOSHUA HENDY. [L. s.] stopping the prime; motor or changingits Witnesses:

speed, substantially asherein set-forth and ex- JOHN L. Boom,

plained. 0. .W. Rrcnumson.

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