USRE17091E

USRE17091E - Hbnby j

Info

Publication number: USRE17091E
Authority: US
Publication date: 1928-10-02

Description

Oct. 2, 1923.

v Re.v1'v7,091

H. J. KASCH MEANS Fon sscunus xuos Arm Duns-'go Insfmuun'r sHAFTs' Original Filed July 5`, ).924

Reimed oa.. 2, 192s.

UNITED STATES may a.

Re.. 1,7.;,091v

PATENTorrlcaif IASCH, l' DAYTON, OHIO, ASSIGNOB TO IURZ-XASCH COMPANY, OF\ SOUTH l BROADWAY, NEAR DAYTON, OHIO', A CORPGBATION OF O HIO.

-miamiron sncunme xNons AND :ms 'ro ms'raunanr sm'rs.

origini no. Lacasse, ama December 1, ma, semi no. 723,951, ma my s,- icm. Appunti for,"

p reissue lled J\anuary 88,

The invention relates to new and useful improvements in means for securing knobs and dials to instrument shafts, and more particularly to means for securing a knob and 5 a dial to a cylindrical shaft or spindle, in`

radio apparatus.

It is one of the principal objects of my invention to provide a loose member, such as a tapered bushing, for firmly securing a knob and dial, or a knob, on an instrument shaft.

In those cases where the knob and dial are made integral `and secured in position on the shaft by set screws, the operation of the latter is diicult because of their inaccessible positions. These set screws also give the device a rough appearance.

My loose grip ing member, which may take the form o a tapered split bushing, will not only close in tightly u on the shaft when the knob is turned, but wi l not mar the appearance of the device because of its entirely concealedposition therein. It Will also present a large gripping or contact surface to the shaft. A

In radio apparatus especially,- mfy loose o carryin stock,

bushing will obviate the necessity ing dials with diierent sized holes for only bushings with different sized holes need be kept on hand with dials having a one-sized hole to receive them. Thus, lsince diiferent sized holes can be formed in the bushing to accommodate different diameter shafts, it becomes a more economical proposition to carry bushings wit-h different sized .35 holes in stock to fit shafts of different diameters, than to carry different dials with the bushings molded in as at present.

My loose tapered bushing may also be provided with a key to engage the shaft, or it 40 may be made solid, with Aholes provided to receive balls that engage the shaft. In any event, my method of pulling on the bushing to cause it, or the key, or the balls to close( in on the shaftr is more advantageous than the set screw or other methods now employed for securing a knob and a dial, or a knob, to an instrument shaft, c,

In theaccompanying drawings, Fig. 1 is a l front view of a combined knob and dial em- 5o bodying my improvements. Fig. 2 is, a side the loose tapered s is a central sect-iena view taken through an'- 192s. serial No. sans.

view thereof. 'Fi ure 3 is a centralv sectlonal view taken .t rough thesame, showing lit bushing. Figure 4.

other type of my device. Figure 5 is a central sectiona view taken through a combined knob and dial employing my ball type of loose bushing. Figure 6l is a central ysectional view taken through a combined knob and dial employing my loose tapered bushing in conjunction with aWoodruf key. And'Figure 7 is a central sectional view taken throu l1 y a two part knob employing my yloose sp it bushing that is closed in against the shaft by turning `the outer part of they knob when the inner part is held stationary.

Referring to the accompanying drawings for a detailed description of the diii'erent forms of embodiment of m invention, the numeral 1 designates adia and 2 a knob, for adjusting a spindle or shaft 3 of any type, but more particularly'that of a radio instrument. (Seek Figures 1, 2 and 3.) The extent of this adjustment is determined by a series of graduations 4, formed on the outer periphery of the dial. The latter may be made of bakelite, metal, a rubber composition or any other suitable substance, and 'has anintegral hub or axial extension 5, in which there is formed a tapering axial hole 6. The knob 2, which is preferably made of bakelite or the like, is formedwith an inner tubular lextension 7 having an axial hole 8, which is' threaded at its inner end./ The tubular extension 7 terminates at its 'inner end in an annular iiange 9 adapted to engage the hub portion 5 of the dial 1, with its hole 8 in registry with -the axial hole v6 in said hub i portion of the dial to receive the outer exl 10.. The inner part outer surface drawn -'against the the shaft without the use of an unsightly and inconvenient set screw.

In Figure 4 I have illustrated a Vernier type knob, through the face of which the hole 8n extends to receive a Vernier shaft 11. The bushing 10 shown in/ this figure and in Figure 3, has its tapered port-ion split to enable it to close in readily against the shaft y3 when `the rknob is turned, but in the case now to be described the loose bushing may be formed without the slits in its tapered portion.

Referring to Figure 5, it will be noted that the loose bushing 10 is not; split, but has formed around the inner edge of its tapering portion, a Ynumber of holes 12, which are counterbored to receive and retain balls 13 which project through the inner Vreduced oriiices of such counter-bored holes, so that when the knob is turned as before described, the balls will engage the shaft 3 to firmly secure the dial and knob thereon. In other words, when the knob 2 is turned, thetapering portion of the bushing will be drawn against the tapered' wall of the hole 6 1n the dial 1 to force the balls 13 into clutching engagement with the shaft.

In Figure 6 the tapered loose bushing 10 is not split, but is formed with an inner concave hole to receive a Woodruff key. 14, which when the knob is turned as before, will engage the shaft 3. In other words, when the knob 2 is turned, the tapered portion of the bushing will be drawn against the tapered wall of the hole 6 in the dial, to force the key 14 into clutching engagement with the shaft, thereby to hold the knob and dial firmly on the latter.

In Figure 7, I have shown a knob, which is made in two parts, the outer part 15 having an inner tubular extension 16, which is internally threaded, and the inner part 17 having a tapering axial hole. When the outer part 15 ofthe knob is placed upon its inner part 17, as in Figure 7, a loose lbushing 18'having its outer end externally threaded and its inner end tapering and split, may beforced through the axial hole-in the inner part 17 of the knob to receive a shaft 19. The outer knob part 1 5 may then be .screwed on the outer threaded portion of the bushing 18, 'to draw its tapering portion against the tapered wall of the axial hole in the inner knob part 17, to cause the split tapering portion of the bushing to firmly clutch the shaft 18-and thereby firmly vsecure both knob parts upon the shaft.

While the invention 'has been illustrated as applied to a circular dial carrying a series of graduations for cooperation with a stationary gage mark or pointer, it is to be understood that itis applicable to a contrary construction wherein a pointer member is to be connected upon the shaft or spindle for cooperation with a stationary series of graduations.

Having described my invention, I claim:

1. In a device of the type described, the combination with a shaft, of a knob and a dial for conjoint use in turning the shaft, the dial having 'a tapering axial hole and the knob having a tubular extension adapted to be brought over said hole, a loose bushing having a tapered, split end adapted to be contracted within said hole, and having its opposite end threaded for connection with the tubular extension on the knob, whereby when the knob is turned, the tapered end ofthe bushing will be contracted tightly-about the shaft, for the purpose speciiied.

2. The-combination of an indicator member having a hub provided with a tapered bore converging outwardly toward the front face of the indicator member, a tapered split bushing fitted within the tapered bore and terminating at its outer and small end in an exteriorly screw threaded extension projecting be- 'yond said hub, and an adjusting member screw threaded upon said extension and bearing upon thevhub to draw Athe tapered bushing f toward the frontl face of said indicator member into the tapered bore of such hub, thereby contracting such split bushing into engagement with a stem surrounded by the bushm0.

t. Means for engaging an indicator and adjustment knob with the spindle of a radio del vice or the like, including an outwardly converging conical bushing longitudinally slotted and compressible into clamping engagement with the spindle which extends within the'bushing, said conical slotted bushing terminatingy in a. screw threadedneck at its apex extremity, an indicator member having an outwardly converging opening therein, through which the conical bushing extends, and an adjusting member at the outer side of said indicator, having screw threaded engagementwith such neck and bearing upon the indicator member to contract the bushing upon the spindle by drawing such slotted conical bushing longitudinally outwardly within the opening in the indicator member.

4. Means for connecting an indicator and adjustment knob with each other and with a spindleof a radio apparatus or the like having a spindle to be rotated, of an indicator the indicator member to-engage 'said' spindle andindicator, member in their relative posi- A ,tions of revoluble adjustment.

5. Meansfor connecting an indicator and adustment knob 'with each other and with a spindle of a radio apparatus or the like, havl. ing a spin dle to be rotated, of an indicator pered couplin engagement by the coupling'sleeve.

(i.K Means for connecting an indicator with a spindle of a radio apparatus and the like, comprising a revoluble indica-tor having radially disposed indicating means formed integral with the head, an` independent adjusting knob for. said indicator, and a coupling mem- 'ber adjustably engageable with a shaft to be rotated, comprising a conicalbushing-invdependent of said indicator, screw threaded at its smaller end and longitudinally slotted at its vlarger end, the indicator having therein a tapered central opening in Which'the slotted portion of the bushing engages with its screw threaded smaller end projecting through andbeyo'nd the front face of the rotary indicator and vinto engagement with the y, adjusting knob, said coupling member being operative'- ly engaged with the shaft and the rotary indicator by theaxial adjustment of the coupling member relative thereto to maintain `said parts in fixed relation with each other by the relative adjustment of the knob.

, 7. Means-,f r connecting an indicator with a spindle of radio apparatus and the like, comprisi l A noliccon ensa'tion material, an independent- Emdi'cator formed from phelyl formed' knob 'for rotatingA the indicator and clutch means projecting beyond the front y face of said indicator for fixedl securing the "indicatorvupon the shaft Lto rotated, comprising a conical bushing screw threaded at its smaller end, and longitudinally slotted at its larger end, said-indicator having thereina taperedo ening in which the slotted'portion of the cutch is seated and wherein it is contracted upon the engaged shaft by Arelative axial adjustment of the indicator and conical bushing, said knob having screw threaded engagement with the smaller end of said conical, said clutch means, and abutting upon said indicator.

`8. Means for securing knobs and dials to instrument shafts-of-radio apparatus and the like, including an indicator molded from phenolic condensation material or the like,

comprising a head poi-tion having a central orifice and an indicating means carried thereby in radially disposed relation Iupon the head, said head having therein a tapered opening,'a conical clutch element-engageable with the 'shaft to be rotated and axially adjustable within the tapered opening, sai conical clutch element being screw threaded at its smaller extremity and 'a coacting member having screw threaded engagement with such smallerfend of the clutch element and abutting upon the indicatorto relatively adjust tlie indicator and clutch element in an axial direction to effect clutching engagement upon the' shaft to be rotated.

9. Means for connecting an indicator with l a spindle of a `radio apparatus and the like,

comprising an indicator member molded from phenolic condensation materialqor the like, having a projecting hub provided with a conical bore, converging. forwardly from its rear toward its forward side, a contractible bushing within the conical bore and projecting beyond the front face of said indicator member, and means engageable with the forward projecting portions of said contractible bushing for drawing the bushing axially relative to the indicator member in a forwardly direction, for contracting said bushing upon a shaft inserted therein to lock the indicator member in fixedv relation therewith. l0. Means for securing knobs and dials to instrument shafts of radio apparatus and the I like, including an indicator member molded from phenolic condensation material having a projecting hub provided with a conical -i bore converging from its rear toward its front face, and open at its opposite ends for the reception of a shaft clutching device.

flu.

11.l As an article of manufacture, a couj sleeve engageable within a conical bore, of an indicatingmember, said tapered sleeve havingat its smaller end, an exte-riorly screw member for securing lan indicator `in fixed position upon a` revoluble shaft, comprising an exteriorly tapered contractiblethreaded neck projecting beyond the front face of the indicating member forengage-Y ment with an adjusting'memberrb which the tapered sleeve is axially adjusta le rel`a` tive to the indicator, the tapered portion of i the sleeve being longitudinally slotted from the larger terminal thereof to a'point in proximity to the screw threaded neck.

12. Means for securing knobs and dials to instrument shafts of radio a paratus and the like, includingr an indicator or radio apparatus and the like, including an exteriorly tapered sleeve terminating at its smaller end in an exteriorly threaded neck, the sleeve being longitudinally slotted from the larger end to a point in proximity to the threaded neck,

lib

an indicator member'having therein a conical bore conyerging forwardly vfrom its rear to 4 y Y p 17,091

itsdforward face, in which the tapered sleeve direction relative to the indicator member, Ahas expansive Wedging pressure, upon forand thereby contracted within the tapered ward longitudinal movement, and any indebore yinto gripping engagement with a shaft 1 pendent adjusting member havin screw' to be turned. 5 threaded engagement with the threa ed neck In testimony whereof, I have hereuntoset of said sleeve at the forward side of saidinmy .hand this-22nd day of January, 1926.

dicator member, by the adjustment of which thesleeve is adjusted axially'in a forwardly HENRY J. KASCH