US1566366A

US1566366A - Door-closure mechanism

Info

Publication number: US1566366A
Application number: US636047A
Authority: US
Inventors: Brady Thomas
Original assignee: BRADY ELEVATOR EQUIPMENT COMPA
Current assignee: BRADY ELEVATOR EQUIPMENT COMPA; BRADY ELEVATOR EQUIPMENT COMPANY Inc
Priority date: 1923-05-02
Filing date: 1923-05-02
Publication date: 1925-12-22
Anticipated expiration: 1942-12-22

Description

:s sheets-sheet'- f1Y T. BRADY DOOR cLosURE MEGHANISM Flled May 2, 1923 Deco N www T. BRADY DOOR CLOSURE MECHANISM Dec. 22, 1925 1,566,366

Filed May 2, 1923 5 Sheets-Sheet. 2

uantoz T. BRADY DOOR CLosURE MECHANISM Filed May 2, 1923 5 Sheets-Sheet 5 Patented Dec. 22, 1925.

YUMTED STATESY DELAWARE.

PATENT onirica.

THOMAS BRADY, OE EAST ORANGE, NEW JERSEY, ASSIGNOR TO BRADY ELEVATOR EQUIPMENT COMPANY, INC., OF HOBOKEN, NEW JERSEY, A CORPORATION O F Doon-CLOSURE iifrncHANIsM.y j

Application filed May 2, 1923.. Serial No. 636,04?.

To all whom it may concern Be it known that I, THOMAS BRADY, a citi- Zen of the United States, and a resident of .East Orange, county ofEsseX, and State of New Jersey, have invented certain new and useful Improvements in Door-Closure Mechanism, of whichl the following is a specification.

This invention relates to door closures for elevator hatchways.

It is very essential that the closure mechanism for elevator hatchway doors be so con# structed and arranged that the `door can not be opened from the floor landings.

When lever mechanism or other latching mechanism is used the door is not latched unless it is entirely closed and therefore if the door is left partly Y. opened it can be opened from the floor level.

To overcome this condition rack and pawl mechanism has been used to prevent the door being opened until it has been entirely closed. This arrangement,l however, has been objectionable because of the noisy operation of the rack and awl.

This invention has or itssalient object to provide rack and pawl door control mechanism so constructed and arranged that it will operate noiselessly.

Another object of the invention is to provide mechanism of the character vdescribed that will operate effectively and can be economicallyv manufactured.

Further objects of the invention will appear from the following description taken in connection with the drawings which form a part of this application and in which, f

Fig. l is an elevational View illustrating a three panel door, lever .closure means an rack and pawl controlling means for the door. Y n v Fig. 2 is a top plan view of the construction shown in Fig. 1, illustrating particularly the lever closure mechanism. n

Fig. 3 is an elevational view on an enlarged scale showing the rack and pawl mechanism illustrated in Fig. 1, these parts being shown in the position taken when the door has not been entirely closed.

Fig. 4L is a sectional elevation taken at right angles to Fig. 3. y

Fig. 5 illustrates the position of the parts when an attempt has been made to open the door when it has not been entirely closed.

Fig. 6 is an elevational view showing the Yshown in Figs'. 6 and 7, and

Fig. 9V is a top plank `view of the rack shown in Figs. L5. y j I The invention briefly described consists of a rack and pawl, one of these membersV being mounted on the door or on aY slidable door section and the other member being l is a sectional-'elevation taken at L mounted on a stationary support in' the' hatchway. The pawl is provided with ,a sloot adjacent the toothed end thereof and in the slot is mounted a pin upon which are mounted rollers. When the door is opened the rollers will hold the pawl tooth in elevated position so that it will not en age the rack and this action lwill also ta e lace when the door is closed. However, i? the door is not entirely closed but is nearly closed the pawl will be positioned as shown in Fig. 3 and any attempt to open the door from this position will cause the pawl tooth to engage the rack teeth. In the embodiment of the invention shown in Figs. 1-5

the pawl is pivoted on a stationary bracket and the rack is carried by the door section. In the embodiment shown in Figs. 6`8 inelusive, however, the pawl is mounted on the door section and the rack isy mounted on a stationary support. v

' In the embodiment of the invention illusd trated in Figs. 1*-5 and 9 a three-panel door prises a plurality of links A, B and C. The

link A is lpivoted at 13 to ,thedoor section l0 and the link B is pivoted at 14 to the link A. The link B is also pivoted at 15 to a bracket 16 secured to the section 11. The link B and the link C are pivotally connected at 17 and tion ot the door operating mechanism.

the opposite Aend of the link C is pivoted at 18 to a lug 19 secured in the elevator hatchway. In the particular form of the invention illustrated in Fig. l a dash pot or cushion 20 is pivoted at 2l toan extension 22 formed on the link C in'order to secure a quiet operan. handle 23 is shown as secured to the link In order t-o open the door the operator pulls downwardly on the handle 23 and the link B swinging theparts to the. position shown in dotted lines wherein the sections l0 and ll have been moved to a posit-ion overlapping the stationary section or panel l2. vIt will be understood that any other form of door operating means may be utilized it desired. Y

In the form ot the invention shown in Figs. linclusive and 9, the rack 23 is mounted on the section l() adjacent the upper edge thereof and the pawl 29 is pivoted at 30 on a plate 3l secured above the hatchway opening. It will be seen from the showing in Fig.' l that the pawl is located in such a position that'it will swing 'freely on its pivot when the door is entirely closed or when the door is entirely opened.

The pawl 29 has formed therein adjacent the toothed end 32 thereof an elongated slot 33 in which is mounted a. pin 34 having mountedthereon rollers 35. In this form of the invention the rack has a pair ot' rails or tracks 36 onv which the rollers are adapted to run and the rack teeth 37 are formed intermediate these rails. The tracks or rails 36 are flared at their ends as shown at 36a to guide the pawl into position above the rack. The under side of the rack is recessed as shown at 38 and openings 39 are provided at the bases of the teeth to permit dust and dir-t to pass downwardly into the recess 38 from which this matter can be cleaned out. The rack is secured to a bracket l0 in a position slightly offset from the panel l0.

rIhe door is shown in Fig. l in full lines in its fully closed position. Then the door is opened the pawl 39 will be swung in an anticlockwise direction and the rollers 35 will ride on the tracks 36 retaining the toothed end A32 of the pawl out of engagement with the rack teeth thereby providing a. noiseless operation. When the door is closed the pawl will be swung in a clockwise direction and the rollers 35 will again ride on the tracks 36. It, however, the door is not entirelyl closed but is stopped in a position suoli as is illustrated in Figs. 3 and 5 and the operator or some unauthorized person tries to open the door the pin 34 will ride upwardly in the slot 33 permitting the toothed end 32 of the pawlto engage one of thevrack teeth. In order to open the door therefore it will be necessary to entirely close it permitting the pawl to swing downwardly to the position shown 1n Fig. l.

The construction shown in Figs. 6, 7 and 3 is similar to that shown in the preceding In this construction, however', the pawl 5l is pivoted at 52 on a plate 53 secured to the botto-m of the door panel 54. rlhe rack 55 is-mounted below the hatchway opening and is provided with two sets of

rack teeth

56 and 57. At the ends of the track 62 the rack base is recessed and llared as shown at 62a to guide the roller 6l into proper position on the track. This construction operates as l'ollows. Then the door is opened the roller will ride on the track 62 thereby ele\f'ating the pawl above the rack. When, however, the door is closed in the direction shown by the arrow in Fig. 6 the pawl will swing to the position shown in t'ull lines and it. the door is stopped in the position shown in this ligure and an attempt is then made to open it, the pawl teeth will engage the rack teeth.

Although certain specitic embodiments ot the invention have been particularly shown and described, it will be understood. that the invention is capable of further modification and that further changes in the construction and in the arrangement of the various cooperating parts may be made without departing from the spirit or scope` of the invention as expressed in the following claims.

lVhat I claim is 1. Pawl and rack mechanism comprising relatively slidable members, a rack mounted on one of said members, a pawl pivoted on the other member, said rack and pawl being constructed and arranged to prevent relative movement orp said members in one direction when the pawl engages the rack teeth, 'and means carried by the pawl for elevating the pawl above and out ot engagement with the rack teeth when one of said members is moving relative to the other member, said means permitting the pawl to engage the teeth when the members are so relatively moved as to move the pawl into such engagement.

2. Pawl and rack mechanism comprising relatively slidable members, a rack mounted on one of said members, a pawl pivoted on the other member, ,said rack and pawl being constructed and arranged to prevent relative movement of said members in one direction when the pawl engages the rack teeth, and means including a roller carried bythe pawl for elevating the pawl above the rack teeth when one ot said members is moving relative to the other member, said means permit-ting the pawl to engage the teeth when the members are so relatively moved as to move the pawl into such engagement.

3. Pawl and rack mechanism comprising relatively slidable members7 a rack mounted on one ot said members, a pawl pivoted on the other member, said rack and pawl being constructed and arranged to prevent relative movement of said members yin one,

direction when the paWl engages the rack teeth, and means including rollers carried by the pawl for elevating the pawl above the rack teeth When one of said members is moving relative to the other member, said means permitting the paWl to engage the teeth When the members are so relatively moved as to move the pawl into such engagement.

4. Pavvl and rack mechanism comprising relatively slidable members, a rack mounted on one of said members, a pawl pivoted on the other member, said rack and paWl being constructed and arranged to prevent relative movement of said members in one direction When the paWl engages the rack teeth, and means including rollers carried by the paWl and movable bodily relative thereto, for elevating the paWl above the rack teeth when one of said members is moving relative to the other member, said means per y mit-ting the paWl to engage the teeth When the mmbers are so relatively moved as to move the paWl into such engagement.

5. Pawl and rack mechanism comprising relatively slidable members, a rack mounted on one of said members, a paWl pivoted on the other member, said pavvl having a longitudinal slot therein, a pin loosely mounted in said slot and rollers mounted on said pin.

6. PaWl Vand rack mechanism comprising relatively slidable members, a rack mounted on one of said members, a pawvl pivoted on the other member, and a roller carried by said paWl and movable bodily relative thereto and longitudinally thereon.

7. Pavvl and rackmechanism comprising relatively slidable members, a rack mounted on one of said members, a pavvl pivoted on the other member, and rollers carrier by said pavvl and movable bodily relative thereto and longitudinally thereon.

8. In combination, a rack having teeth formed thereon and having a track disposed 'adapted to roll on said track.

`parallel )to said teeth and a paWl having a tooth adapted to engage the rack teeth and a roller slidably mounted thereon and adapted to roll on said track.

9. In combination, arack having teeth formed thereon and having a track disposed adjacent to said teeth and a pawl having a tooth adapted to engage the rack teeth and a roller slidably mounted thereon l and l0. In combination, a rack having teeth formed thereon and having a track disposed adjacent to said teeth and a paWl having a tooth adapted to engage the rack teeth and a roller slidably mounted thereon and adapted to yroll on said track, and means for retaining the roller on the track.

11. In combination, a rack having teeth formed thereon and having a track disposed adjacent to said teeth and a paWl having a tooth adapted to engage the rack teeth and a roller slidably mounted thereon and adapted to roll on said track, and means for guiding the -roller to and retaining the roller on the track. Y

12. In combination, a rack having teeth formed thereon and having tracks disposed j adjacent to said teeth and a paWl having a' tooth adapted to engage the rack teeth and rollers slidably mounted thereon and adapted toroll on said tracks. V

13. PaWl and rack mechanism comprising relatively slidable members, a rack mounted on one of saidmembers, a pawl pivoted on the other member, said rack and pawl being constructed and arranged to prevent relative movement of the members in one direction when the pawl engages the rack teeth and means for elevating the pawl above and oulof engagement with the rack teeth when relative movement of the members takes place in the opposite direction.

my hand this 30th day of April, '1923.

THOMAS BRAD Y.