Патент USA US2405685код для вставки
Aug. 13, 1946. F. J. CANTRE‘LL 21,405,685 WINDOW JACK Filed Feb. 28, 1945 FIG. I.~ C INVENTOR. FRANK _ JQ CANTRELL Patented Aug. 13, 1946 2,405,685 UNITED I STATES PATENT ICE WINDOW JACK _ Frank J. Cantrell, San Francisco; Calif; assignor of forty-nine per cent to Eleanor Josephine Koch, San Francisco, Calif. 1 .Application February 28, 1945, Serial.No."580,183 4 Claims. (Cl. 5304-24) "This invention relates to window jacks, and more particularly to a safety window seat espe cially useful in supporting persons engaged in washing, polishing or otherwise working on the exterior of windows in buildings. Principal objects of this invention are to pro vide a seat which may be easily a?ixed to any given window in a manner insuring safety of the user thereof; to provide a seat which is com pact in design, which may be quickly and ef? ciently transported from place to place and ?xed in operative position with a minimum effort; and to provide a seat adapted to be used by Window cleaners, or the like, which may be adjusted con 2 yond members I2 to form safety stop portions 14 adapted to ‘abut against the inner wall or casement D» when ‘the seat is "in operative posi tion. Vertical posts vl5 are rigidly affixed tomembers 12 in front vof the platform member ID and are "preferably formed ‘.so that they cu‘rve slightly away from the platform member to form cam m-ing surfaces, as at“. A hook member -l'l is ,slidably ‘carried under platform vIll and cross member l3, the hook portion l8 thereof being adapted to engage the interior moulding sill A. The shank of the hook member .H is provided with longitudinal slots 20 and 2|. Slot. .20 is veniently in accordance with the individual de 15 provided with a threaded ‘bolt 22 having a ?at sire of the user ‘after initial positioning and occu head which is slidable in said slot and adapted to pancy of the seat. A further object of the in project upwardly therethrough ‘and ‘through an vention. is .to provide a window'jack, haVing ad aperture provided in cross member l3. ‘Said bolt carries a wing-nut, or the like, 23. By tightening justable safety elements, obviating‘ dif?culty of attachment to various designs of window struc 20 nut 23 ‘the hook member may be clamped in a ture. ?xed position relative to cross member l3. Hence Further objects are to provide a window jack by regulation of hook member I‘! the platform which is sturdy of construction and simple in ‘member may-be readily adjusted to form an effec design‘ and which may be manufactured at low tive safety hook' for use with varying window cost; and to provide a unitary Window jack, - constructions. wherein safety and. comfort are combined without .It is noted that‘a' guide stud 25, rigidly ?xed to sacri?cing simplicitylo-f use and structure. Other platform member 10, projects through slot 2| objects vand advantages willv be apparent upon and .acts as a guide for hook member vl'l'to pre reference to the accompanying speci?cation and vent lateral movement thereof relative to said drawing in which similar characters of refer 30 platform member. It is also noted that a groove ence represent corresponding parts in the sev maybe provided in- cross member 13 to receive eral views. the shank portion of hook member I 7. In the Fig. 1 is a side elevation of my invention at drawing, the slot has been omitted for clarity of tached to a window of conventional construc illustration. tion. 35 An axle 26is pivotally mounted in bearings Fig. 2 is a top plan view of my invention. 21, provided on base members l2 and positioned Fig. 3 is a bottom plan view of my invention below approximately the forward edge of plat with the sill support member partly broken away. form member In. Adjustable sill support 28 is Fig. 4 is a fragmentary sectional view taken on rigidly or integrally ?xed to said. axle so that it line IV—IV of Fig. 2. . may swing vertically relative to base members l2 Referring to the drawing, the novel window and platform member In. The support 28 com seat is disclosed attached to a conventional win prises a ?at piece of metal or other suitable ma dow structure wherein A represents the interior terial having an aperture 29 provided therein at moulding sill and B the exterior inclined sill or the rear and centrally thereof. In the drawing, window ledge. C represents a conventional win 45 the support 28 is shown as generally triangular dow frame vertically slidable in casement D. in form, but it is obvious that it may be rectangu A platform member is generally indicated at H) lar or other shape. and is provided with a back rest I! which may A hole 36 is provided in platform number l0 be rigidly or integrally attached to the platform near the rear thereof. A nut-forming member member or in any suitable manner. Horizontal 50 3! is ?xed on the underside of platform member base members l2 are rigidly a?ixed to the sides IE3 and is vertically spaced therefrom. A bolt 32 of the platform member Ill and extend forwardly is threadably carried in said nut-forming member thereof. Cross member i3 is rigidly attached to so that the knurled head 33 thereof is located the forward ends of members l2 and is preferably below the platform member ID. Preferably the formed to extend laterally a short distance be 55 nut-forming member 3| comprises a bracket ?xed 2,405,685 3 by screws or bolts 34 to the underside of platform member l0 and provided with a threaded bore 35 positioned in vertical alignment with hole 30. Bolt 32 is formed at one end with a double ball joint 36 adapted to engage support 28, through aperture 29, and whereby said bolt is rotatable with respect to said support. It is necessary that aperture 29 and bore 35 be in substantial vertical in order to raise or lower said platform without tilting said platform. 2. In a window jack having a platform member and base members rigidly a?ixed thereto, support means pivotally mounted on said base members and movable vertically relative thereto, a nut-' forming member rigidly af?xed to said platform member and vertically spaced from the under side thereof, a bolt threadably carried in said nut alignment with one another and positioned below hole 30. By turning the knurled head 33 of bolt. ,10 forming member and rotatively engaged to said support member, and means provided in said plat member 32 it is possible relativetotoelevate the building and lower to which the platform it is at- ' form member in vertical alignment with said bolt whereby ready access may be had to cause manual regulation of said bolt by an operator after occu in the window jack and desire to elevate or lower himself relative to the window and may accom 15 pancy of said window jack in order to raise or tached. The operator may have assumed his seat , plish this purpose by simple manipulation of the bolt 32 by access thereto through hole 30. From the above description it is clear that there lower said platform without tilting said platform. 3. In a window jack having a platform member and base members rigidly a?ixed thereto, a pair of vertical stops adapted to abut against a rela are a number of safety'and comfort features in corporated in the window jack, namely, an ad 20 tively unmovable object, a hook member slidable justable hook member ll adapted to be positioned horizontally relative to said platform member, so that the hook portion thereof is ?xed relative to the interior moulding sill of a window; a pair means to lock said hook member in a ?xed posi tion, a sill support pivotally mounted to the un tioning of the device relative to the window member, and means formed in said platform derside of said base member, a nut-forming mem of vertical’posts I5, adapted to be positioned ad ber rigidly a?ixed to the underside of said plat 25 jacent to the interior face‘ of window frame 0, stop form member and vertically spaced therefrom, a portions l6 adapted to abut against casement D; bolt threadably carried in said nut-forming and bolt 32 adapted to regulate the vertical posi means and rotatively engaged to said support after the operator has assumed his working posi 30 member in vertical alignment with said bolt, whereby an operator may have ready access to tion. Although I have described the invention in more or less detail, it is understood that various modi?cations and variations may be practiced said bolt for manual regulation thereof after occupancy of said window jack. ' 4. In a window jack having a platform member within the spirit of the invention'and scope of the 35 and base members affixed thereto, a hook mem appended claims. ' ber slidable horizontally relative to said platform member and adapted to engage a window sill, means to ?x said hook member in rigid position, a support member pivotally and slidably mounted and base members rigidly ai?xed thereto, a hook member slidable horizontally relative to said 40 on said hook member, means to lock said support member to said hook member, a support means platform member, means to ?x said hook member pivotally mounted on said base members and in rigid position, support means pivotally mount movable vertically relative thereto, unitary means ed on said base members and movable vertically to move said support means including a nut form I claim: , , 1. In a window jack having afplatform member relative thereto, and a unitary means to move said ing member carried by said platform member, support means including a nut-forming member 45 and means formed in said platform invertical carried by said'platform member, said last named alignment with said unitary means whereby an unitary means positioned under said platform and operator may have ready access to said unitary in vertical alignment with an aperture formed means for manual regulation thereof after occu therein whereby said means may be regulated by 50 pancy of the said window jack. ' an operator after occupancy of said window jack FRANK J. CANTRELL.