CA1165065A - Lever attachment for a rotary door knob - Google Patents
Lever attachment for a rotary door knobInfo
- Publication number
- CA1165065A CA1165065A CA000383917A CA383917A CA1165065A CA 1165065 A CA1165065 A CA 1165065A CA 000383917 A CA000383917 A CA 000383917A CA 383917 A CA383917 A CA 383917A CA 1165065 A CA1165065 A CA 1165065A
- Authority
- CA
- Canada
- Prior art keywords
- arms
- collar
- attachment according
- clip
- knob
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Lock And Its Accessories (AREA)
Abstract
LEVER ATTACHMENT FOR A ROTARY DOOR KNOB
ABSTRACT OF THE DISCLOSURE
A lever attachment for a rotary door knob comprises an arcuate collar adapted to embrace the knob, the collar terminating at its opposite ends in arms and being formed on an arc such that the arms have a tendency to diverge. The collar is formed of material sufficiently resilient to enable the arms to be moved into engagement with one another, there-by causing radial contraction of the collar and enabling the latter to grip the knob. The arms are releasably maintained in engagement by any one of a number of different kinds of latches.
ABSTRACT OF THE DISCLOSURE
A lever attachment for a rotary door knob comprises an arcuate collar adapted to embrace the knob, the collar terminating at its opposite ends in arms and being formed on an arc such that the arms have a tendency to diverge. The collar is formed of material sufficiently resilient to enable the arms to be moved into engagement with one another, there-by causing radial contraction of the collar and enabling the latter to grip the knob. The arms are releasably maintained in engagement by any one of a number of different kinds of latches.
Description
-~
I
1 ¦ It is common practice to provide interior and
I
1 ¦ It is common practice to provide interior and
2 ¦ exterior doors of buildings with knobs which must be ro-
3 ¦ tated to effect openin~ of the doors. Rotation of a door
4 ¦ knob is not a simple undertaking for many persons, such ~s
5 ¦ those afflicted with arthritis or whose hands or arms are B ¦ otherwise handicapped. A rockable lever is more easily 7 manipulated by such persons, but by the time the handicap 8 of some persons manifests itself the doors of the building 9 ¦ occupied by such persons may already be fitted with rotary knobs. The expense of replacing rotary knobs with rockable 11¦ leversmay be beyond the means of many persons who would 12¦ desire such replacement.
14 The desirabilit~ of converting rotary knobs to rockable levers by the attachment of a lever to a rotary 16¦ knob has been recogniæed heretofore. Typical of conversion 1~¦ devices heretofore proposed are those disclosed in Sutter 18 U.S. patents Nos. 2,756,088 and 2,801,122; Hohl U.S. patent ~ , 19¦ No. 3,575,~53; and Overholser U.S. patent No~ 3,827,739.
20 ¦ Although the constructions disclosed in these patents enable 21¦ a rotary knob to be converted to a rockable lever, each of such 22¦ constructions requires the use of one or more tools to effect 231 the conversion. Quite often, the person who desires to ~41 make the conversion is incapable of using the necessary 251 tools, thereby requiring the assistance of some other person.
~61 ~7 ¦ Another objection to conversion devices o the ~81 kind heretofore proposed is that, when such devices are in-~01 stalled, some or all of the mounting means is visible, thereby ~ol detracting from the appearance of the door knob and the door ,," ..11 ~ 3 1 on which it is mounted.
31 An ob~ect of the present invention is to provide 41 a lever attachment adapted to be fitted to a rotary door 51 knob and which requires the use of no tools in mounting the 61 attachment on the knob.
8 Another object of the invention is to provide an 9¦ attachment of the kind re~erred to and wherein the mour.ting means is invisible or disguised.
12¦ A lever attachment for a rotary door knob comprises 13 an arcuate collar terminating at its opposite ends in a pair 14 ¦ of arms which diverge when the attachment is conditioned for mounting on the door knob. The collar is formed from a ma-16¦ terial having a resiliency such that the radius of the collar 17 ¦ may be reduced to effect movement of the arms toward and into 18¦ engagement with one another. The radius of the collar, when 19¦ reduced, is such that the collar will embrace and grip tightly 20 ¦ a rotary knob, and the resilience of the collar material will 21¦ tend to separate the arms. Latch means is provided for re-22¦ leasably latching the arms in engagement with one another, 231 and the tendency of the collar to expand radially maintains ~41 the latch means snugly in latching condition. The collar 251 thus will be retained in snug, frictional engagement with ~61 the knob so as to enable rotation of the knob in response ~7 ¦ to rocking of the lever attachment.
~8 Attachments constructed in accordance with the ~ s 1 ¦ invention are disclosed in the following description and 2 ¦ in the accompanying drawings, wherein:
4 ¦ Figure 1 is an elevational view of a lever 5 ¦ attachment according to one embodiment of the invention
14 The desirabilit~ of converting rotary knobs to rockable levers by the attachment of a lever to a rotary 16¦ knob has been recogniæed heretofore. Typical of conversion 1~¦ devices heretofore proposed are those disclosed in Sutter 18 U.S. patents Nos. 2,756,088 and 2,801,122; Hohl U.S. patent ~ , 19¦ No. 3,575,~53; and Overholser U.S. patent No~ 3,827,739.
20 ¦ Although the constructions disclosed in these patents enable 21¦ a rotary knob to be converted to a rockable lever, each of such 22¦ constructions requires the use of one or more tools to effect 231 the conversion. Quite often, the person who desires to ~41 make the conversion is incapable of using the necessary 251 tools, thereby requiring the assistance of some other person.
~61 ~7 ¦ Another objection to conversion devices o the ~81 kind heretofore proposed is that, when such devices are in-~01 stalled, some or all of the mounting means is visible, thereby ~ol detracting from the appearance of the door knob and the door ,," ..11 ~ 3 1 on which it is mounted.
31 An ob~ect of the present invention is to provide 41 a lever attachment adapted to be fitted to a rotary door 51 knob and which requires the use of no tools in mounting the 61 attachment on the knob.
8 Another object of the invention is to provide an 9¦ attachment of the kind re~erred to and wherein the mour.ting means is invisible or disguised.
12¦ A lever attachment for a rotary door knob comprises 13 an arcuate collar terminating at its opposite ends in a pair 14 ¦ of arms which diverge when the attachment is conditioned for mounting on the door knob. The collar is formed from a ma-16¦ terial having a resiliency such that the radius of the collar 17 ¦ may be reduced to effect movement of the arms toward and into 18¦ engagement with one another. The radius of the collar, when 19¦ reduced, is such that the collar will embrace and grip tightly 20 ¦ a rotary knob, and the resilience of the collar material will 21¦ tend to separate the arms. Latch means is provided for re-22¦ leasably latching the arms in engagement with one another, 231 and the tendency of the collar to expand radially maintains ~41 the latch means snugly in latching condition. The collar 251 thus will be retained in snug, frictional engagement with ~61 the knob so as to enable rotation of the knob in response ~7 ¦ to rocking of the lever attachment.
~8 Attachments constructed in accordance with the ~ s 1 ¦ invention are disclosed in the following description and 2 ¦ in the accompanying drawings, wherein:
4 ¦ Figure 1 is an elevational view of a lever 5 ¦ attachment according to one embodiment of the invention
6 ¦ and prior to assembly with a door knob;
7 Fi.gure 2 is an elevational view of the attachment
8 applied to a rotary knob;
91 Figure 3 is a sectional view taken on ~he line 10 ¦ 3-3 of Figure 2;
11 Figure 4 is a fragmentary, plan view o~ a portion 12¦ of the apparatus as viewed in the direction of the arrows 13 4-4 of Fi~ure 2;
~41 Figure 5 is a view similar to Figure 1, but illus-trating another embodiment;
16¦ Figure 6 is an elevational view of a modified 17 ¦ form of latch adapted for use with the attachment of Figure 181 5;
19¦ Figure 7 is a view similar to Figure 2, but illus-20 ¦ trating another embodiment of the attachment; and 21¦ Figures 8 and 9 are sectional views on the lines 22¦ 8-8 and 9-9, respectively, of Figure 7.
241 An attachment constructed in accordance with all 251 embodiments of the invention is adapted for use in con-26¦ ~unction with a rotary door knob 1 that is rotatably mounted 27 ¦ on a sleeve 2 mounted on a door 3 via a garnish ring 4.
28¦ rotary stem (not shown) extends through the sleeve 2 and ~¦ is connected at one end to the knob 4 and at its other end ~ 5 l to a bolt operating mechanism (not shown) as is conventional.
2 To effect movement of the bolt hetween its retracted and 31 projected positions, the knob l must be rotated.
51 An attachment according to the embodiment of the ~ invention disclosed in Figures 1-4 is designated generally 7 by the reerence character 5 and comprises a one-piece~
8 molded member having an arcuate collar 6 terminating at
91 Figure 3 is a sectional view taken on ~he line 10 ¦ 3-3 of Figure 2;
11 Figure 4 is a fragmentary, plan view o~ a portion 12¦ of the apparatus as viewed in the direction of the arrows 13 4-4 of Fi~ure 2;
~41 Figure 5 is a view similar to Figure 1, but illus-trating another embodiment;
16¦ Figure 6 is an elevational view of a modified 17 ¦ form of latch adapted for use with the attachment of Figure 181 5;
19¦ Figure 7 is a view similar to Figure 2, but illus-20 ¦ trating another embodiment of the attachment; and 21¦ Figures 8 and 9 are sectional views on the lines 22¦ 8-8 and 9-9, respectively, of Figure 7.
241 An attachment constructed in accordance with all 251 embodiments of the invention is adapted for use in con-26¦ ~unction with a rotary door knob 1 that is rotatably mounted 27 ¦ on a sleeve 2 mounted on a door 3 via a garnish ring 4.
28¦ rotary stem (not shown) extends through the sleeve 2 and ~¦ is connected at one end to the knob 4 and at its other end ~ 5 l to a bolt operating mechanism (not shown) as is conventional.
2 To effect movement of the bolt hetween its retracted and 31 projected positions, the knob l must be rotated.
51 An attachment according to the embodiment of the ~ invention disclosed in Figures 1-4 is designated generally 7 by the reerence character 5 and comprises a one-piece~
8 molded member having an arcuate collar 6 terminating at
9 its opposite ends in a pair of arms 7 and 8. The collar has a groove 9 in its inner surface defining a pair of ll arcuate, parallel ribs lO and ll. The rib lO preferably is 12 radially thicker than the rib ll, for a purpose presently to 13¦ be explained, but the ribs could be of the same radial thick-l4¦ ness or the rib ll could be thicker than the rib lO. The attachment 5 is formed from a material such as polypropylene, 18¦ polyethylene, nylon, or the like~ which has sufficient re-l7 siliency to enable the arms 7 and 8 to be moved toward and 18¦ into engagement with one another and in substantially paral-l9 lel overlying relation as is shown in Figure 2. Such move-ment of the arms 7 and 8 results in radial contraction of21¦ the collar 6 and stressing of the latter so as to exert a 22¦ constant force on the arms tending to return them to their 23 diverging positions. This tendency is restrained and the 2~ arms are releasably maintained in overlying, substantially parallel relationship by separable latch means.
~7 In the embodiment shown in Figures 1-4, the latch ~8 means comprises an integral finger or pawl 12 depending from 2~ ¦ the free end of the arm 7 and terminating in a lip 13. The . 1 I 3~ jt~
1 arm 8 is provided with a slot or socket 14 between the side 21 edges of the arm and of such width as snugly to accommodate 3 the ~inger 12. At the base of the slot 14 is an undercut 4 shoulder 15 on which the lip 13 i5 adapted to seatO
B To apply the attachment 5 to the rotary knob 1, 7 the arms 7 and 8 are spread apart, as shown in Figure 1, 8 and the collar 6 is fitted over the knob 1 to embrace the 9¦ latter. The arms 7 and 8 then may be moved toward one
~7 In the embodiment shown in Figures 1-4, the latch ~8 means comprises an integral finger or pawl 12 depending from 2~ ¦ the free end of the arm 7 and terminating in a lip 13. The . 1 I 3~ jt~
1 arm 8 is provided with a slot or socket 14 between the side 21 edges of the arm and of such width as snugly to accommodate 3 the ~inger 12. At the base of the slot 14 is an undercut 4 shoulder 15 on which the lip 13 i5 adapted to seatO
B To apply the attachment 5 to the rotary knob 1, 7 the arms 7 and 8 are spread apart, as shown in Figure 1, 8 and the collar 6 is fitted over the knob 1 to embrace the 9¦ latter. The arms 7 and 8 then may be moved toward one
10 ¦ another, thereby radially contracting the collar 6 to cause
11 the latter tightly to grip the surface of the knob 1. The
12¦ arms 7 and 8 are of sufficient flexibility to enable the
13¦ latch lip 13 to snap under the shoulder 15 and maintain the
14¦ attachment 5 assembled with the knob 1. The attachment may be removed from the knob 1 by disengaging the lip 13 from 16 the shoulder 15.
18¦ When the attachment is applied to the knob 1, the 19¦ attachment functions as a rockable lever to transmit rota-tion to the knob. The attachment may be applied to the knob 21 with the arms extending horizontally, vertically, or at 22 any angular position therebetween.
~41 The knob 1 shown in Figure 3 has a tapered con-figuration. Such a knob is in wide usaye, thereby making ~6 it economical to produce attachments in large quantities ~7 for use with such knobs. When the attachment is applied to 28 ¦ a tapered knob like that shown in Figure 3, the radially 2~ thicker rib 10 will overlie the marginal edge of the face 30 l ,.1 l ~ 5 1 of the knob, to prevent movement o the ~ollar 6 toward the 21 door 3, and -the radially thinner rib 11 will bear against 31 the surface of the knob and prevent movement of ~he collar 41 away from the door 3. The different thicknesses of the 51 ribs thus function to position the collar axially of the 6 axis of rotation of the knob.
8 If the rotary knob to which the attachment 5 is 9 to be applied has a configuration other than that shown in Figure 3, the attachment nevertheless may be used inasmuch 11 as the resiliency of the material from which the collar 6 12 ¦ is formed will enable the latter to adapt to differently 13 ¦ shaped surfaces. However, the cross-sectional configuration 14¦ of the collar 6 can be molded in such manner as to comple-ment knobs of many different configurations.
17 If the knob has no key slot therein, a decorative 18 membrane (not shown) may overlie the face of the knob and 19 ¦ be held in place by the rib 10. A decorative membrane a]so 20 ¦ may be used if the knob has a key slot, but in this case 21 ¦ the membrane also should have an opening in register with the 22 ¦ key slot.
~4 ¦ The attachment 5a shown in Figures 5 and 6 is similar to the previously described embodiment and in-26 cludes a collar 6a and arms 7a and 8a having grooves 16 and ~7 17, respectively, in their outer surfaces and grooves 18 28 and 19, respectively, at their free ends. Means for latching 2~ the arms 7a and 8a in overlying, substantially parallel 3~
, 1 ~L ~ t~ 5 1 positions comprises a U-shaped clip 20 having parallel legs 2 21 and 22 joined by a web 23 of such length as to span both legs. Serrations or teeth 24 are provided on the confronting 41 surfaces of the legs 21 and 22 adjacent their free ends~
~¦ The clip 20 may be accommodated in the grooves 7 16-19 when the arms 7a and 8a are in overlying, engaged 8 positions so as to maintain the collar 6a in snugly em-9 bracing relationship with a rotary knob.
11 The attachment 5b shown in Figures 7-9 is similar 12 to the earlier described embodiments and has a collar 6b 13 from which extends a pair of arms 7b and 8b. Adjacent 14¦ their junctures with the collar the arms 7b and 8b are re-lieved to form cavities 25 and 26, respectively, for the 16¦ purpose of increasing the flexibility of the arms adjacent 17 ¦ the collar. The latch means comprises a loop or ring 27 18 that is adapted to encircle the arms 7b and 8b and be re-19 tained in recesses or grooves 28 and 2g formed in the outer 20 ¦ surfaces of the arms 7b and 8b respectively.
22¦ In all of the disclosed embodiments of the inven-23 tion the latching means not only maintains the arms of the ~41 attachments in engagement with one another, but also pre-vents lateral movement of the arms relative to one another.
~6 ¦ The lever attachment, therefore, is extremely stable when ~7 it is applied to a rotary knobO
~8 The disclosed embodiments are representative o ~0 ,- 1 l ~ '{~
1¦ presently pref~rred forms of the invention~ but are intended 21 to be illustrative rather than definitive thereof. The 9 ¦ nvention is defined in the claim~.
~37 ~8 ~0 ~0 I
18¦ When the attachment is applied to the knob 1, the 19¦ attachment functions as a rockable lever to transmit rota-tion to the knob. The attachment may be applied to the knob 21 with the arms extending horizontally, vertically, or at 22 any angular position therebetween.
~41 The knob 1 shown in Figure 3 has a tapered con-figuration. Such a knob is in wide usaye, thereby making ~6 it economical to produce attachments in large quantities ~7 for use with such knobs. When the attachment is applied to 28 ¦ a tapered knob like that shown in Figure 3, the radially 2~ thicker rib 10 will overlie the marginal edge of the face 30 l ,.1 l ~ 5 1 of the knob, to prevent movement o the ~ollar 6 toward the 21 door 3, and -the radially thinner rib 11 will bear against 31 the surface of the knob and prevent movement of ~he collar 41 away from the door 3. The different thicknesses of the 51 ribs thus function to position the collar axially of the 6 axis of rotation of the knob.
8 If the rotary knob to which the attachment 5 is 9 to be applied has a configuration other than that shown in Figure 3, the attachment nevertheless may be used inasmuch 11 as the resiliency of the material from which the collar 6 12 ¦ is formed will enable the latter to adapt to differently 13 ¦ shaped surfaces. However, the cross-sectional configuration 14¦ of the collar 6 can be molded in such manner as to comple-ment knobs of many different configurations.
17 If the knob has no key slot therein, a decorative 18 membrane (not shown) may overlie the face of the knob and 19 ¦ be held in place by the rib 10. A decorative membrane a]so 20 ¦ may be used if the knob has a key slot, but in this case 21 ¦ the membrane also should have an opening in register with the 22 ¦ key slot.
~4 ¦ The attachment 5a shown in Figures 5 and 6 is similar to the previously described embodiment and in-26 cludes a collar 6a and arms 7a and 8a having grooves 16 and ~7 17, respectively, in their outer surfaces and grooves 18 28 and 19, respectively, at their free ends. Means for latching 2~ the arms 7a and 8a in overlying, substantially parallel 3~
, 1 ~L ~ t~ 5 1 positions comprises a U-shaped clip 20 having parallel legs 2 21 and 22 joined by a web 23 of such length as to span both legs. Serrations or teeth 24 are provided on the confronting 41 surfaces of the legs 21 and 22 adjacent their free ends~
~¦ The clip 20 may be accommodated in the grooves 7 16-19 when the arms 7a and 8a are in overlying, engaged 8 positions so as to maintain the collar 6a in snugly em-9 bracing relationship with a rotary knob.
11 The attachment 5b shown in Figures 7-9 is similar 12 to the earlier described embodiments and has a collar 6b 13 from which extends a pair of arms 7b and 8b. Adjacent 14¦ their junctures with the collar the arms 7b and 8b are re-lieved to form cavities 25 and 26, respectively, for the 16¦ purpose of increasing the flexibility of the arms adjacent 17 ¦ the collar. The latch means comprises a loop or ring 27 18 that is adapted to encircle the arms 7b and 8b and be re-19 tained in recesses or grooves 28 and 2g formed in the outer 20 ¦ surfaces of the arms 7b and 8b respectively.
22¦ In all of the disclosed embodiments of the inven-23 tion the latching means not only maintains the arms of the ~41 attachments in engagement with one another, but also pre-vents lateral movement of the arms relative to one another.
~6 ¦ The lever attachment, therefore, is extremely stable when ~7 it is applied to a rotary knobO
~8 The disclosed embodiments are representative o ~0 ,- 1 l ~ '{~
1¦ presently pref~rred forms of the invention~ but are intended 21 to be illustrative rather than definitive thereof. The 9 ¦ nvention is defined in the claim~.
~37 ~8 ~0 ~0 I
Claims (14)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A lever attachment for a rotary knob comprising an arcuate collar having at its opposite ends arms extend-ing away from said collar and terminating in free ends, said collar being formed on an arc such that said collar may embrace said knob with said arms diverging from said collar, said collar being formed of material sufficiently resilient to enable said collar to be radially contracted and said arms to engage and substantially parallel one another; and latch means spaced from said collar and re-leasably maintaining said arms in engagement with each other.
2. The attachment according to claim 1 wherein said latch means comprises a pawl carried by one of said arms and a socket in the other of said arms.
3. The attachment according to claim 2 wherein said pawl and said socket are at the free ends of said arms.
4. The attachment according to claim 1 wherein said latch means comprises a clip engaging both of said arms.
5. The attachment according to claim 4 wherein said clip is substantially U-shaped having a pair of legs joined at corresponding ends by a web.
6. The attachment according to claim 5 wherein the legs of said clip extend longitudinally of said arms and said web spans the free ends of said arms.
7. The attachment according to claim S wherein one leg of said clip engages one of said arms, the other leg of said clip engages the other of said arms, and the web of said clip spans said arms.
8. The attachment according to claim 5 wherein the legs of said clip are accommodated in recesses formed in said arms.
9. The attachment according to claim 1 wherein said latch means comprises a loop encircling said arms.
10. The attachment according to claim 9 wherein said loop is accommodated in recesses formed in said arms.
11. The attachment according to claim 1 wherein said collar has a groove in its inner surface flanked by a pair of parallel ribs.
12. The attachment according to claim 11 wherein one of said ribs is radially thicker than the other.
13. The attachment according to claim 1 wherein said arms are relieved adjacent their juncture with said collar
14. The attachment according to claim 1 wherein said latch means comprises a U-shaped clip having parallel legs joined at corresponding ends by a web, the other ends of said legs having confronting serrations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000383917A CA1165065A (en) | 1981-08-14 | 1981-08-14 | Lever attachment for a rotary door knob |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000383917A CA1165065A (en) | 1981-08-14 | 1981-08-14 | Lever attachment for a rotary door knob |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1165065A true CA1165065A (en) | 1984-04-10 |
Family
ID=4120701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000383917A Expired CA1165065A (en) | 1981-08-14 | 1981-08-14 | Lever attachment for a rotary door knob |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1165065A (en) |
-
1981
- 1981-08-14 CA CA000383917A patent/CA1165065A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |