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US2719712A - Balance mechanism for vertically sliding windows - Google Patents

Balance mechanism for vertically sliding windows Download PDF

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Publication number
US2719712A
US2719712A US382554A US38255453A US2719712A US 2719712 A US2719712 A US 2719712A US 382554 A US382554 A US 382554A US 38255453 A US38255453 A US 38255453A US 2719712 A US2719712 A US 2719712A
Authority
US
United States
Prior art keywords
cam
window
springs
casing
slipper
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 - Lifetime
Application number
US382554A
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English (en)
Inventor
Young William
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US2719712A publication Critical patent/US2719712A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D13/00—Accessories for sliding or lifting wings, e.g. pulleys, safety catches
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/50—Application of doors, windows, wings or fittings thereof for vehicles
    • E05Y2900/53—Type of wing
    • E05Y2900/55—Windows
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18568—Reciprocating or oscillating to or from alternating rotary
    • Y10T74/188—Reciprocating or oscillating to or from alternating rotary including spur gear
    • Y10T74/18808—Reciprocating or oscillating to or from alternating rotary including spur gear with rack
    • Y10T74/18816—Curvilinear rack
    • Y10T74/18824—Curvilinear rack with biasing means

Definitions

  • This invention has reference to balance mechanism for vertically sliding windows and relates particularly to such mechanism of the type comprising a spring loaded cam enclosed within a casing and a lever operatively connected to the cam, said spring loaded cam and lever being adapted for connection, the one to a fixture and the other to the sliding window so that the cam is rotated when the window is raised and lowered, the profile of the cam being such that the window is substantially balanced by the spring loading in all positions.
  • the object of the invention is to provide an improved construction of window balance mechanism of the type set forth which will operate with just that little friction which is necessary to prevent the sliding window from opening or closing when subjected to vibration.
  • Another object of the invention is to provide improved mechanism of the type set forth whereby the requisite pressure can be imparted to the cam while maintaining the thickness of the mechanism casing such that it can be fitted in the available space in the bodywork of the vehicle or door in which the window is fitted.
  • window balance mechanism of the type set forth is provided with a slipper on which at least one spring bears and a fulcrumed cam, the slipper bearing at a point substantially centrally thereof on the rocking member and said member transmitting the spring loading to the cam.
  • the invention further consists in window balance mechanism as set forth in the preceding paragraph wherein the cam is loaded by means of a plurality of helical compression springs arranged in co-planary parallel formation and which bear uniformly on the slipper.
  • a window with the improved fittings applied thereto may be raised and lowered by applying pressure directly thereto, the movement of the window being transmitted to the cam through the lever.
  • the improved balance mechanism may however be provided with an operating handle by which said cam and lever can be rotated to raise and lower the window.
  • the cam may be provided with a toothed quadrant with which meshes a spur wheel provided with an operating handle, the cam and the lever being rotated through the spur wheel and toothed quadrant to raise and lower the window by the operation of the handle.
  • Figure 1 is an elevation of one form of the improved balance mechanism with the front half of the casing removed;
  • FIGS 2, 3 and 4 are sections on the lines 22, 3-3 and 4 4 of Figure 1 respectively;
  • Figure 5 is a view corresponding to Figure 1 but showing a handle for the direct rotation of the cam and raising and lowering of the window;
  • Figure 6 is a section on the line 66 of Figure 5;
  • Figure 7 is a further view corresponding to Figure 1 Z 7 19 ,712 Patented Oct. 4, 1955 but showing a handle and gearing for the rotation of the cam and Figure 8 is a section on the line 88 of Figure 7.
  • the casing containing the balance mechanism consists of two pressings 12 and 13 which are secured together by spot welding or otherwise.
  • Each pressing is provided with three co-planary parallel channels 14 so that the two pressings together form three parallel co-planary housings.
  • a helical compression spring 15 In each housing is fitted a helical compression spring 15.
  • the pressings form a bearing 16 and fitted within said bearing is a short spindle or stud 17 on which the cam 18 and also a lever 19 are secured.
  • a spring carrier 20 on which bears the outer ends of the three springs and which can be adjusted to vary the compression of the springs by means of a screw threaded spindle 21 which has a head 22 and is screwed into a nut 23 'held fast between the two pressings forming the casing.
  • the spindle bears on the spring carrier centrally between the two ends thereof.
  • the slipper is shaped to fit and to be guided by the walls of the three housings in which the springs are accommodated.
  • rocking member formed of two similar plates 25 fulcrumed on a stud 26 accommodated in recesses formed in the pressings.
  • Said plates embrace a part of the cam and carry therebetween a roller 27 which bears on the cam.
  • the plates are angled to make contact points 28 which bear on or near the transverse centre line of the slipper, that is, the points are in or nearly in a transverse plane containing the axis of the central spring.
  • the cam has cut therein an arcuate slot 29 in which fit stops 30 formed in the two pressings, the stops cooperating with the ends of the slot to limit the rotary movement of the cam.
  • the casing is secured to the window body or fixed frame and the lever 19 is provided with a roller, not shown, fitted in a transverse channel secured to the vertically sliding windo to be balanced by the balance mechanism.
  • the casing can be of such dimensions that it can fit within the limited available space in the bodywork in which the sliding window is fitted.
  • the fulcrumed member always bears on the slipper at or near its transverse centre line so that there is' little tendency of the slipper to tilt. Further the walls of the housings in which the slipper is fitted serve as guides to prevent tilting of the slipper. Consequently there is little friction between the slipper and fulcrumed lever and there is no danger of the slipper and fulcrumed lever jamming and thereby preventing the smooth operation of the balance mechanism.
  • the small friction in the operating parts is just that necessary to prevent the windows opening or closing under vibration.
  • a locking device of known construction housed in a flanged casing 32 secured to the face of one of the pressings, may be provided torprevent the opening of .the window otherwise than by the operation of the handle, the stud 17 passing the casing and :being encircled by a helical .locking spring fitted therein.
  • the cam is provided-with a toothed quadrant 3'3 with which meshes a spur wheel 34 fast on a spindle 35 carrying an operating handle 35.
  • the counter-balancing mechanism may be. duplicated for large windows and in addition the duplicated mechanism may be interconnected to each .other by means of link work so that they are positively operated in unison. Where the counter-balancing mechanism is applied to a swept window the mechanism may be provided with any known construction of link work by which the window is so supported that it will be prevented from tilting.
  • Balance mechanism for .vertically sliding windows comprising a casing, a number of parallel compression springs housed in said casing, a slipper resiliently loaded by the compression springs, a cam, a lever operatively connected to the.ca rn and a rocking member fulcrumed to. the casing and bearing on a point substantially central- 1y of the slipper and also bearing on the cam so that the resilient. loadingofthe springs .is transmitted through said rocking member and cam to the lever, the casing and the lever being for connection, the one to a fixture and the other to the sliding window and the formation of the cam being such that the force transmitted tothe lever through the slipper, rocking member and cam-by the springs is substantially uniform in all positions of the lever.
  • Balance mechanism for vertically sliding windows comprising a casing, a number of parallel compression springs housed in said casing, a slipper resiliently loaded by the compression springs, a earn, a lever operatively connected to the cam, a rocking member fulcrumed to the casing and bearing on a point substantially centrally of the slipper and also bearing, on the cam so that the resilient loading of the springs is transmitted through said rocking member and cam to the lever, a toothed quadrant rigid with the cam, a spur wheel meshing with the tooth quadrant and a hand lever rigid with the spur wheel and by the operation of which the cam can be rotated, the casing and the lever being for connection, the one to a fixture and the other to the sliding window and the formation of the cam being such that the force transmitted to the lever is substantially uniform in all positions of the lever.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Window Of Vehicle (AREA)
  • Transmission Devices (AREA)
  • Lock And Its Accessories (AREA)
US382554A 1952-10-02 1953-09-28 Balance mechanism for vertically sliding windows Expired - Lifetime US2719712A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB24733/52A GB715934A (en) 1952-10-02 1952-10-02 Improvements in and relating to balance mechanism for vertically sliding windows

Publications (1)

Publication Number Publication Date
US2719712A true US2719712A (en) 1955-10-04

Family

ID=10216400

Family Applications (1)

Application Number Title Priority Date Filing Date
US382554A Expired - Lifetime US2719712A (en) 1952-10-02 1953-09-28 Balance mechanism for vertically sliding windows

Country Status (4)

Country Link
US (1) US2719712A (pt)
BE (1) BE523201A (pt)
DE (1) DE948038C (pt)
GB (1) GB715934A (pt)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1639094A (en) * 1923-01-02 1927-08-16 Klein Georges Counterbalancing means for movable devices
US2198751A (en) * 1937-08-30 1940-04-30 Young William Device for controlling vertically sliding windows

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT129275B (de) * 1930-09-01 1932-07-25 William Young Ausgleich- und Feststellvorrichtung für Schiebefenster.
GB362928A (en) * 1930-09-03 1931-12-03 William Young Improvements in or relating to devices for controlling windows of the vertically sliding type

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1639094A (en) * 1923-01-02 1927-08-16 Klein Georges Counterbalancing means for movable devices
US2198751A (en) * 1937-08-30 1940-04-30 Young William Device for controlling vertically sliding windows

Also Published As

Publication number Publication date
GB715934A (en) 1954-09-22
DE948038C (de) 1956-08-23
BE523201A (pt)

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